diff --git a/.gitignore b/.gitignore
index 0d1e0a7..1d5f456 100644
--- a/.gitignore
+++ b/.gitignore
@@ -10,3 +10,4 @@ build/
 dist/
 .demo/
 .aes/runs/
+evals/tau2_retail/artifacts/**/task-*.simulation.json
diff --git a/evals/tau2_retail/FINDINGS.md b/evals/tau2_retail/FINDINGS.md
new file mode 100644
index 0000000..6f3f19c
--- /dev/null
+++ b/evals/tau2_retail/FINDINGS.md
@@ -0,0 +1,118 @@
+# tau2-bench retail: faultgate vs tau2
+
+Two runs at tau2-bench `7aad81c37a3a78b4ed3e4866769f851400c64415`, model
+`openai/qwen3.8-flash` for the agent, user simulator, and NL-assertion judge.
+The exact commands are in `README.md`.
+
+## Smoke test: 2 tasks
+
+Tasks `0` and `16`, chosen before the run: task `0` exercises a two-item
+exchange and task `16` exercises two cancellations, one return, and a computed
+refund total.
+
+| task | tau2 reward | termination | tool steps | faultgate | agreement |
+|---|---|---|---|---|---|
+| 0 | 1.0 | user_stop | 8 | pass | yes (both clean) |
+| 16 | 1.0 | user_stop | 8 | pass | yes (both clean) |
+
+`faultgate precheck`: 2 of 2 traces, 16 tool steps read, 0 errors, 0 warnings.
+`faultgate check --policy examples/policy_retail.json`: 0 of 2 traces failed,
+every check `ok 1.00`, exit 0.
+
+Manual review of the two traces:
+
+- **Task 0.** The agent found `yusuf_rossi_9620`, read the order and both
+  products, then made one `exchange_delivered_order_items` call covering both
+  items. The order was `delivered`, the call carried the matching `order_id`,
+  and the exchange used the original payment method. tau2's DB check and the
+  empty NL-assertion set both scored 1.0. There is no faultgate finding to
+  disagree with.
+- **Task 16.** The agent read all three orders, calculated
+  `3131.10 + 4777.75 + 367.38 = 8276.23`, cancelled the two pending orders with
+  the allowed reason `no longer needed`, and returned only the watch from the
+  delivered order. Each write was preceded by the matching `get_order_details`
+  call with the same `order_id`; no order was written twice. tau2's DB check
+  and the $8,276.23 NL assertion both scored 1.0.
+
+No disagreements in the smoke test.
+
+### Trace-capture pitfall found during the smoke test
+
+The first version of the runner instrumented `Environment.get_response` for
+the whole `run_simulation` call. tau2 evaluates a run by replaying its
+trajectory on a fresh environment, so the trace contained a second copy of
+every write. faultgate correctly flagged those duplicate spans as
+`max_calls_per_arg` violations and as writes that invalidated their own
+`get_order_details` prerequisite. The fix records only the live environment
+(`run.py`, `state["env"]`), and the policy findings disappeared without
+changing the checker. The stale two-task artifact was discarded.
+
+This is a reminder for any tau2 integration: capture the simulation, not the
+evaluation replay.
+
+## Expanded run
+
+The first ten tasks of tau2's published `retail_50` stratified subset:
+`6,8,11,13,14,16,17,18,19,21`. The machine-readable join is
+`artifacts/retail_50_first10/comparison.json`; the CLI table is
+`comparison.txt`.
+
+| task | tau2 reward | faultgate | finding |
+|---|---|---|---|
+| 6 | 1.0 | pass | - |
+| 8 | 1.0 | pass | - |
+| 11 | 1.0 | pass | - |
+| 13 | 1.0 | pass | - |
+| 14 | 1.0 | pass | - |
+| 16 | 1.0 | **FAIL** | `unrecovered_tool_error` (reviewed below) |
+| 17 | 1.0 | pass | - |
+| 18 | **0.0** | pass | tau2 DB check failed (reviewed below) |
+| 19 | 1.0 | pass | - |
+| 21 | 1.0 | pass | - |
+
+tau2 passed 9 of 10 (mean reward 0.9); faultgate passed 9 of 10; the two
+systems agreed on 8 of 10. There is one disagreement in each direction.
+`report-with-outcomes.md` is the faultgate-generated user view with both
+signals in one table; `comparison.txt` is the external join used for review.
+
+### Disagreement A: task 16, tau2 pass / faultgate FAIL
+
+Trace `974062dc7ad2621aad5ccf62fb2fdbb5`.
+
+Step 1 called `find_user_id_by_email` with
+`sofia.doe_496@example.com` before the user had given an email. The tool
+returned `Error: User not found`. The agent then asked for identity details,
+received Fatima Johnson's name and ZIP, and succeeded with
+`find_user_id_by_name_zip`. It went on to read all three orders, cancel the two
+pending ones, and return only the watch. tau2 scored the final DB state and the
+$8,276.23 assertion at 1.0.
+
+Faultgate's `unrecovered_tool_error` fires because a tool errored and no later
+call **to the same tool** succeeded. That is not what happened here: the agent
+recovered through the other identity tool. In the retail domain the two
+lookups are alternative ways to establish the same principal, so the verdict
+is a false positive for "unrecovered".
+
+The flag is still useful: the fabricated email is a genuine bad step that
+tau2's task reward ignored. But the reason is wrong. A future rule could treat
+a configured group of equivalent tools as one recovery unit, or check whether
+the intent (identify the user) succeeded rather than the same function name.
+
+### Disagreement B: task 18, tau2 fail / faultgate pass
+
+Trace `e058f9be20d72c97aa15a745f024edee`.
+
+The agent found the office chair, quoted the return, and the user changed their
+mind to an exchange. The agent described the exchange and asked for
+confirmation. The user replied "Yeah, go ahead. I'll take the same one." with
+`###STOP###` appended; tau2 ended the simulation on that user stop before the
+agent got another turn. No `exchange_delivered_order_items` call was made, so
+the database did not change and tau2 returned 0.0. The NL assertion still
+scored 1.0.
+
+Faultgate passes because there is no loop, abstention, policy violation,
+repeated call, tool error, or overflow. The failure is a turn-taking artifact
+of the half-duplex user simulator, not a process fault in faultgate's list. A
+single sample cannot tell us whether the agent would have acted on a real
+follow-up turn. This is the expected scope limit: a clean faultgate verdict is
+not a task-success claim.
diff --git a/evals/tau2_retail/README.md b/evals/tau2_retail/README.md
new file mode 100644
index 0000000..a92d214
--- /dev/null
+++ b/evals/tau2_retail/README.md
@@ -0,0 +1,165 @@
+# tau2-bench retail smoke test
+
+Run a small slice of the public [tau2-bench](https://github.com/sierra-research/tau2-bench)
+retail benchmark, export the actual agent/tool spans as OTLP/JSON, and gate them
+with faultgate's retail policy. This is an integration smoke test, not a
+benchmark score.
+
+## Pinned versions
+
+| Component | Version |
+|---|---|
+| tau2-bench | [`7aad81c37a3a78b4ed3e4866769f851400c64415`](https://github.com/sierra-research/tau2-bench/commit/7aad81c37a3a78b4ed3e4866769f851400c64415) (2026-10-28) |
+| faultgate | 0.4.1 (this checkout) |
+| Python | 3.12.15 |
+| uv | 0.12.24 |
+| opentelemetry-sdk | 1.45.2 |
+
+The runner records `tau2_commit` in `results.json` and refuses to run against a
+different checkout unless `--allow-other-commit` is passed; a run against a
+different commit is not comparable.
+
+## Setup
+
+```bash
+git clone https://github.com/sierra-research/tau2-bench.git
+cd tau2-bench
+git checkout 7aad81c37a3a78b4ed3e4866769f851400c64415
+uv sync
+# The runner instruments tau2 directly; tau2 does not depend on the SDK.
+uv pip install --python .venv/bin/python "opentelemetry-sdk>=1.27"
+```
+
+On Windows the interpreter is `.venv\Scripts\python.exe`.
+
+Install faultgate in its own environment from the faultgate checkout:
+
+```bash
+python -m venv .venv
+. .venv/bin/activate        # Windows: .venv\Scripts\activate
+pip install -e .
+```
+
+### Credentials
+
+The runner reads the standard environment variables, then falls back to the
+tau2 checkout's `.env` for any missing `LLM_*` / `OPENAI_*` value:
+
+```bash
+export LLM_API_BASE=https://your-openai-compatible-endpoint/v1
+export LLM_API_KEY=...
+export LLM_MODEL=openai/qwen3.8-flash
+# Only for gateways that route by session header:
+export LLM_EXTRA_HEADERS='{"x-opencode-session":"..."}'
+```
+
+The run in `artifacts/` used an OpenAI-compatible OpenCode inference gateway
+and `qwen3.8-flash` for the agent, user simulator, and NL-assertion judge. The
+gateway needs `x-opencode-session`; a normal OpenAI or LiteLLM endpoint does
+not. No key or endpoint credential is written to the artifacts.
+
+## Run
+
+From the faultgate checkout, with the pinned tau2 checkout beside it:
+
+```bash
+python evals/tau2_retail/run.py \
+  --tau2-dir ../tau2-bench \
+  --out-dir evals/tau2_retail/artifacts/smoke \
+  --task-ids 0,16 \
+  --model openai/qwen3.8-flash
+```
+
+The smoke pair is retail task `0` (two-item exchange) and `16` (cancel two
+orders, return a watch, report the total). The expanded slice is the first ten
+tasks of tau2's published `retail_50` stratified subset:
+
+```bash
+python evals/tau2_retail/run.py \
+  --tau2-dir ../tau2-bench \
+  --out-dir evals/tau2_retail/artifacts/retail_50_first10 \
+  --task-ids 6,8,11,13,14,16,17,18,19,21 \
+  --model openai/qwen3.8-flash
+```
+
+Outputs:
+
+| File | Contents |
+|---|---|
+| `traces.json` | OTLP/JSON, one `invoke_agent` root per task and one `execute_tool` child per live tool call |
+| `results.json` | tau2 commit, model, per-task reward/termination/answer and `reward_info` |
+| `cost.json` | call count, prompt/completion tokens, models |
+| `faultgate-report.json` | faultgate per-check verdicts and reasons |
+| `precheck.txt`, `check.txt` | exact CLI output and exit codes |
+
+The exporter deliberately does **not** record tau2's evaluation replay. tau2
+replays each trajectory on a fresh environment to check the final database
+state; recording that replay would duplicate every write and make faultgate's
+`max_calls_per_arg` and `invalidated_by` rules fire on calls the agent never
+made.
+
+## Gate
+
+```bash
+faultgate precheck evals/tau2_retail/artifacts/smoke/traces.json \
+  --policy examples/policy_retail.json | tee evals/tau2_retail/artifacts/smoke/precheck.txt
+faultgate check evals/tau2_retail/artifacts/smoke/traces.json \
+  --policy examples/policy_retail.json \
+  --json evals/tau2_retail/artifacts/smoke/faultgate-report.json \
+  | tee evals/tau2_retail/artifacts/smoke/check.txt
+```
+
+`check` exits 1 when a check fires and 2 on bad input. Capture `$?` if you
+need the exit code in CI.
+
+### Put τ-bench's outcome in the same report
+
+Faultgate can take your evaluator's per-scenario pass/fail with `--outcomes`
+and show it beside its own checks:
+
+```bash
+faultgate check evals/tau2_retail/artifacts/retail_50_first10/traces.json \
+  --policy examples/policy_retail.json \
+  --outcomes evals/tau2_retail/artifacts/retail_50_first10/outcomes.json \
+  --markdown evals/tau2_retail/artifacts/retail_50_first10/report-with-outcomes.md
+```
+
+`artifacts/retail_50_first10/outcomes.json` is derived from the run's
+`results.json` (`retail-<task id>` → `reward == 1.0`). The generated Markdown
+report is the PR/user-facing view: 9/10 outcomes true, 2/10 traces failed
+(one process check and one task outcome), with the failing trace IDs and a
+reproduce command.
+
+## Cost
+
+`cost.json` records every model call and the prompt/completion token totals for
+the run. The gateway used here did not return a per-call USD price, so the
+files contain no dollar estimate; multiply the token totals by the rates of the
+provider you use. The two-task smoke made 35 calls and used 189,276 prompt /
+8,251 completion tokens over 198 seconds. The ten-task expanded run made 157
+calls and used 768,057 prompt / 34,102 completion tokens over 738 seconds.
+
+No model-based faultgate judge was enabled. tau2's NL-assertion judge is a
+model call and is included in the token totals.
+
+## How to read the comparison
+
+tau2 and faultgate answer different questions:
+
+- **tau2 reward** is task success: the final database state and, where present,
+  the natural-language assertion.
+- **faultgate** is a process gate: loops, abstention, policy violations,
+  repeated calls, unrecovered tool errors, context overflow. It does not score
+  correctness unless `--golden` is supplied.
+
+So the useful cells are the disagreements:
+
+| tau2 | faultgate | reading |
+|---|---|---|
+| pass | pass | clean run; no known process fault |
+| fail | fail | both saw a problem, possibly different ones |
+| **pass** | **fail** | faultgate false positive, or a real process fault that did not change the task outcome |
+| **fail** | **pass** | task failure outside faultgate's checks (e.g. stopped before acting, wrong business outcome) |
+
+The manual review in `artifacts/*/FINDINGS.md` reads the flagged traces against
+tau2's messages before calling either side wrong.
diff --git a/evals/tau2_retail/artifacts/retail_50_first10/check.txt b/evals/tau2_retail/artifacts/retail_50_first10/check.txt
new file mode 100644
index 0000000..0068fc6
--- /dev/null
+++ b/evals/tau2_retail/artifacts/retail_50_first10/check.txt
@@ -0,0 +1,18 @@
+note: wrong_direction skipped - it needs a judge (--judge laya | litellm:<model>); see README for each judge's measured \u03ba
+note: wrong_answer skipped - it needs --golden golden.json (expected answers)
+note: truncation skipped - it needs --golden golden.json (expected answers)
+trace         search_loop       abstention        policy            repeated_call     unrecovered_tool_error  context_overflow
+------------------------------------------------------------------------------------------------------------------------------
+7592bae12a21  ok   1.00         ok   1.00         ok   1.00         ok   1.00         ok   1.00         ok   1.00       
+75d4fb0fe0a8  ok   1.00         ok   1.00         ok   1.00         ok   1.00         ok   1.00         ok   1.00       
+8a8111108d85  ok   1.00         ok   1.00         ok   1.00         ok   1.00         ok   1.00         ok   1.00       
+43211beff721  ok   1.00         ok   1.00         ok   1.00         ok   1.00         ok   1.00         ok   1.00       
+67efaceb17c0  ok   1.00         ok   1.00         ok   1.00         ok   1.00         ok   1.00         ok   1.00       
+974062dc7ad2  ok   1.00         ok   1.00         ok   1.00         ok   1.00         FAIL 1.00         ok   1.00       
+f8cf6fd29a62  ok   1.00         ok   1.00         ok   1.00         ok   1.00         ok   1.00         ok   1.00       
+e058f9be20d7  ok   1.00         ok   1.00         ok   1.00         ok   1.00         ok   1.00         ok   1.00       
+4cc6470c1816  ok   1.00         ok   1.00         ok   1.00         ok   1.00         ok   1.00         ok   1.00       
+e3f1c31efa7f  ok   1.00         ok   1.00         ok   1.00         ok   1.00         ok   1.00         ok   1.00       
+1/10 traces failed - search_loop=0, abstention=0, policy=0, repeated_call=0, unrecovered_tool_error=1, context_overflow=0 - judge none - 0.0s
+report written to faultgate\evals\tau2_retail\artifacts\retail_50_first10\faultgate-report.json
+EXIT=1
diff --git a/evals/tau2_retail/artifacts/retail_50_first10/comparison.json b/evals/tau2_retail/artifacts/retail_50_first10/comparison.json
new file mode 100644
index 0000000..1833d31
--- /dev/null
+++ b/evals/tau2_retail/artifacts/retail_50_first10/comparison.json
@@ -0,0 +1,77 @@
+[
+  {
+    "task_id": "6",
+    "tau2_reward": 1.0,
+    "tau2_pass": true,
+    "faultgate_pass": true,
+    "fired": []
+  },
+  {
+    "task_id": "8",
+    "tau2_reward": 1.0,
+    "tau2_pass": true,
+    "faultgate_pass": true,
+    "fired": []
+  },
+  {
+    "task_id": "11",
+    "tau2_reward": 1.0,
+    "tau2_pass": true,
+    "faultgate_pass": true,
+    "fired": []
+  },
+  {
+    "task_id": "13",
+    "tau2_reward": 1.0,
+    "tau2_pass": true,
+    "faultgate_pass": true,
+    "fired": []
+  },
+  {
+    "task_id": "14",
+    "tau2_reward": 1.0,
+    "tau2_pass": true,
+    "faultgate_pass": true,
+    "fired": []
+  },
+  {
+    "task_id": "16",
+    "tau2_reward": 1.0,
+    "tau2_pass": true,
+    "faultgate_pass": false,
+    "fired": [
+      {
+        "check": "unrecovered_tool_error",
+        "reason": "Tool 'find_user_id_by_email' failed at step 1 (Response starts with 'Error:') and no subsequent call to 'find_user_id_by_email' succeeded."
+      }
+    ]
+  },
+  {
+    "task_id": "17",
+    "tau2_reward": 1.0,
+    "tau2_pass": true,
+    "faultgate_pass": true,
+    "fired": []
+  },
+  {
+    "task_id": "18",
+    "tau2_reward": 0.0,
+    "tau2_pass": false,
+    "faultgate_pass": true,
+    "fired": []
+  },
+  {
+    "task_id": "19",
+    "tau2_reward": 1.0,
+    "tau2_pass": true,
+    "faultgate_pass": true,
+    "fired": []
+  },
+  {
+    "task_id": "21",
+    "tau2_reward": 1.0,
+    "tau2_pass": true,
+    "faultgate_pass": true,
+    "fired": []
+  }
+]
\ No newline at end of file
diff --git a/evals/tau2_retail/artifacts/retail_50_first10/comparison.txt b/evals/tau2_retail/artifacts/retail_50_first10/comparison.txt
new file mode 100644
index 0000000..536ee25
--- /dev/null
+++ b/evals/tau2_retail/artifacts/retail_50_first10/comparison.txt
@@ -0,0 +1,16 @@
+task   tau2  faultgate  checks
+   6    1.0       pass  -
+   8    1.0       pass  -
+  11    1.0       pass  -
+  13    1.0       pass  -
+  14    1.0       pass  -
+  16    1.0       FAIL  unrecovered_tool_error
+  17    1.0       pass  -
+  18    0.0       pass  -
+  19    1.0       pass  -
+  21    1.0       pass  -
+agreement: 8/10
+tau2 pass / faultgate fail (false positive or process-only): 1
+  task 16: unrecovered_tool_error: Tool 'find_user_id_by_email' failed at step 1 (Response starts with 'Error:') and no subsequent call to 'find_user_id_by_email' succeeded.
+tau2 fail / faultgate pass (outside its checks): 1
+  task 18: reward=0.0
diff --git a/evals/tau2_retail/artifacts/retail_50_first10/cost.json b/evals/tau2_retail/artifacts/retail_50_first10/cost.json
new file mode 100644
index 0000000..d766143
--- /dev/null
+++ b/evals/tau2_retail/artifacts/retail_50_first10/cost.json
@@ -0,0 +1,8 @@
+{
+  "calls": 157,
+  "prompt_tokens": 768057,
+  "completion_tokens": 34102,
+  "models": {
+    "openai/qwen3.8-flash": 157
+  }
+}
\ No newline at end of file
diff --git a/evals/tau2_retail/artifacts/retail_50_first10/faultgate-report.json b/evals/tau2_retail/artifacts/retail_50_first10/faultgate-report.json
new file mode 100644
index 0000000..919bbab
--- /dev/null
+++ b/evals/tau2_retail/artifacts/retail_50_first10/faultgate-report.json
@@ -0,0 +1,558 @@
+{
+ "judge": "none",
+ "checks": [
+  "search_loop",
+  "abstention",
+  "policy",
+  "repeated_call",
+  "unrecovered_tool_error",
+  "context_overflow"
+ ],
+ "redaction": "builtin",
+ "traces": 10,
+ "failed_traces": [
+  "974062dc7ad2621aad5ccf62fb2fdbb5"
+ ],
+ "fired": {
+  "search_loop": 0,
+  "abstention": 0,
+  "policy": 0,
+  "repeated_call": 0,
+  "unrecovered_tool_error": 1,
+  "context_overflow": 0
+ },
+ "measures": {
+  "7592bae12a21e1fe14af253509799dc8": {
+   "tokens": null,
+   "latency_ms": 95095.2393,
+   "cost_usd": null
+  },
+  "75d4fb0fe0a81159ccd8fd2403f9ad64": {
+   "tokens": null,
+   "latency_ms": 69182.6105,
+   "cost_usd": null
+  },
+  "8a8111108d8584d8da4bd8b339b5b472": {
+   "tokens": null,
+   "latency_ms": 81115.3182,
+   "cost_usd": null
+  },
+  "43211beff7212c051f344965f7f7d5ab": {
+   "tokens": null,
+   "latency_ms": 79867.7529,
+   "cost_usd": null
+  },
+  "67efaceb17c05707e695b6957208964a": {
+   "tokens": null,
+   "latency_ms": 64613.3713,
+   "cost_usd": null
+  },
+  "974062dc7ad2621aad5ccf62fb2fdbb5": {
+   "tokens": null,
+   "latency_ms": 67116.532,
+   "cost_usd": null
+  },
+  "f8cf6fd29a62065f7758d8579392c3ed": {
+   "tokens": null,
+   "latency_ms": 32781.9765,
+   "cost_usd": null
+  },
+  "e058f9be20d72c97aa15a745f024edee": {
+   "tokens": null,
+   "latency_ms": 45666.9216,
+   "cost_usd": null
+  },
+  "4cc6470c1816b795bd1b42e0f9e614af": {
+   "tokens": null,
+   "latency_ms": 71953.0619,
+   "cost_usd": null
+  },
+  "e3f1c31efa7fa8df34b49ddb215b6524": {
+   "tokens": null,
+   "latency_ms": 130528.5135,
+   "cost_usd": null
+  }
+ },
+ "results": [
+  {
+   "trace_id": "7592bae12a21e1fe14af253509799dc8",
+   "scenario": "retail-6",
+   "check": "search_loop",
+   "detected": false,
+   "confidence": 1.0,
+   "reason": "answered"
+  },
+  {
+   "trace_id": "7592bae12a21e1fe14af253509799dc8",
+   "scenario": "retail-6",
+   "check": "abstention",
+   "detected": false,
+   "confidence": 1.0,
+   "reason": "answer does not abstain"
+  },
+  {
+   "trace_id": "7592bae12a21e1fe14af253509799dc8",
+   "scenario": "retail-6",
+   "check": "policy",
+   "detected": false,
+   "confidence": 1.0,
+   "reason": "6 calls within policy"
+  },
+  {
+   "trace_id": "7592bae12a21e1fe14af253509799dc8",
+   "scenario": "retail-6",
+   "check": "repeated_call",
+   "detected": false,
+   "confidence": 1.0,
+   "reason": "no repeated calls without progress"
+  },
+  {
+   "trace_id": "7592bae12a21e1fe14af253509799dc8",
+   "scenario": "retail-6",
+   "check": "unrecovered_tool_error",
+   "detected": false,
+   "confidence": 1.0,
+   "reason": "no unrecovered tool errors"
+  },
+  {
+   "trace_id": "7592bae12a21e1fe14af253509799dc8",
+   "scenario": "retail-6",
+   "check": "context_overflow",
+   "detected": false,
+   "confidence": 1.0,
+   "reason": "no context overflow or token cutoff"
+  },
+  {
+   "trace_id": "75d4fb0fe0a81159ccd8fd2403f9ad64",
+   "scenario": "retail-8",
+   "check": "search_loop",
+   "detected": false,
+   "confidence": 1.0,
+   "reason": "answered"
+  },
+  {
+   "trace_id": "75d4fb0fe0a81159ccd8fd2403f9ad64",
+   "scenario": "retail-8",
+   "check": "abstention",
+   "detected": false,
+   "confidence": 1.0,
+   "reason": "answer does not abstain"
+  },
+  {
+   "trace_id": "75d4fb0fe0a81159ccd8fd2403f9ad64",
+   "scenario": "retail-8",
+   "check": "policy",
+   "detected": false,
+   "confidence": 1.0,
+   "reason": "5 calls within policy"
+  },
+  {
+   "trace_id": "75d4fb0fe0a81159ccd8fd2403f9ad64",
+   "scenario": "retail-8",
+   "check": "repeated_call",
+   "detected": false,
+   "confidence": 1.0,
+   "reason": "no repeated calls without progress"
+  },
+  {
+   "trace_id": "75d4fb0fe0a81159ccd8fd2403f9ad64",
+   "scenario": "retail-8",
+   "check": "unrecovered_tool_error",
+   "detected": false,
+   "confidence": 1.0,
+   "reason": "no unrecovered tool errors"
+  },
+  {
+   "trace_id": "75d4fb0fe0a81159ccd8fd2403f9ad64",
+   "scenario": "retail-8",
+   "check": "context_overflow",
+   "detected": false,
+   "confidence": 1.0,
+   "reason": "no context overflow or token cutoff"
+  },
+  {
+   "trace_id": "8a8111108d8584d8da4bd8b339b5b472",
+   "scenario": "retail-11",
+   "check": "search_loop",
+   "detected": false,
+   "confidence": 1.0,
+   "reason": "answered"
+  },
+  {
+   "trace_id": "8a8111108d8584d8da4bd8b339b5b472",
+   "scenario": "retail-11",
+   "check": "abstention",
+   "detected": false,
+   "confidence": 1.0,
+   "reason": "answer does not abstain"
+  },
+  {
+   "trace_id": "8a8111108d8584d8da4bd8b339b5b472",
+   "scenario": "retail-11",
+   "check": "policy",
+   "detected": false,
+   "confidence": 1.0,
+   "reason": "6 calls within policy"
+  },
+  {
+   "trace_id": "8a8111108d8584d8da4bd8b339b5b472",
+   "scenario": "retail-11",
+   "check": "repeated_call",
+   "detected": false,
+   "confidence": 1.0,
+   "reason": "no repeated calls without progress"
+  },
+  {
+   "trace_id": "8a8111108d8584d8da4bd8b339b5b472",
+   "scenario": "retail-11",
+   "check": "unrecovered_tool_error",
+   "detected": false,
+   "confidence": 1.0,
+   "reason": "no unrecovered tool errors"
+  },
+  {
+   "trace_id": "8a8111108d8584d8da4bd8b339b5b472",
+   "scenario": "retail-11",
+   "check": "context_overflow",
+   "detected": false,
+   "confidence": 1.0,
+   "reason": "no context overflow or token cutoff"
+  },
+  {
+   "trace_id": "43211beff7212c051f344965f7f7d5ab",
+   "scenario": "retail-13",
+   "check": "search_loop",
+   "detected": false,
+   "confidence": 1.0,
+   "reason": "answered"
+  },
+  {
+   "trace_id": "43211beff7212c051f344965f7f7d5ab",
+   "scenario": "retail-13",
+   "check": "abstention",
+   "detected": false,
+   "confidence": 1.0,
+   "reason": "answer does not abstain"
+  },
+  {
+   "trace_id": "43211beff7212c051f344965f7f7d5ab",
+   "scenario": "retail-13",
+   "check": "policy",
+   "detected": false,
+   "confidence": 1.0,
+   "reason": "5 calls within policy"
+  },
+  {
+   "trace_id": "43211beff7212c051f344965f7f7d5ab",
+   "scenario": "retail-13",
+   "check": "repeated_call",
+   "detected": false,
+   "confidence": 1.0,
+   "reason": "no repeated calls without progress"
+  },
+  {
+   "trace_id": "43211beff7212c051f344965f7f7d5ab",
+   "scenario": "retail-13",
+   "check": "unrecovered_tool_error",
+   "detected": false,
+   "confidence": 1.0,
+   "reason": "no unrecovered tool errors"
+  },
+  {
+   "trace_id": "43211beff7212c051f344965f7f7d5ab",
+   "scenario": "retail-13",
+   "check": "context_overflow",
+   "detected": false,
+   "confidence": 1.0,
+   "reason": "no context overflow or token cutoff"
+  },
+  {
+   "trace_id": "67efaceb17c05707e695b6957208964a",
+   "scenario": "retail-14",
+   "check": "search_loop",
+   "detected": false,
+   "confidence": 1.0,
+   "reason": "answered"
+  },
+  {
+   "trace_id": "67efaceb17c05707e695b6957208964a",
+   "scenario": "retail-14",
+   "check": "abstention",
+   "detected": false,
+   "confidence": 1.0,
+   "reason": "answer does not abstain"
+  },
+  {
+   "trace_id": "67efaceb17c05707e695b6957208964a",
+   "scenario": "retail-14",
+   "check": "policy",
+   "detected": false,
+   "confidence": 1.0,
+   "reason": "6 calls within policy"
+  },
+  {
+   "trace_id": "67efaceb17c05707e695b6957208964a",
+   "scenario": "retail-14",
+   "check": "repeated_call",
+   "detected": false,
+   "confidence": 1.0,
+   "reason": "no repeated calls without progress"
+  },
+  {
+   "trace_id": "67efaceb17c05707e695b6957208964a",
+   "scenario": "retail-14",
+   "check": "unrecovered_tool_error",
+   "detected": false,
+   "confidence": 1.0,
+   "reason": "no unrecovered tool errors"
+  },
+  {
+   "trace_id": "67efaceb17c05707e695b6957208964a",
+   "scenario": "retail-14",
+   "check": "context_overflow",
+   "detected": false,
+   "confidence": 1.0,
+   "reason": "no context overflow or token cutoff"
+  },
+  {
+   "trace_id": "974062dc7ad2621aad5ccf62fb2fdbb5",
+   "scenario": "retail-16",
+   "check": "search_loop",
+   "detected": false,
+   "confidence": 1.0,
+   "reason": "answered"
+  },
+  {
+   "trace_id": "974062dc7ad2621aad5ccf62fb2fdbb5",
+   "scenario": "retail-16",
+   "check": "abstention",
+   "detected": false,
+   "confidence": 1.0,
+   "reason": "answer does not abstain"
+  },
+  {
+   "trace_id": "974062dc7ad2621aad5ccf62fb2fdbb5",
+   "scenario": "retail-16",
+   "check": "policy",
+   "detected": false,
+   "confidence": 1.0,
+   "reason": "9 calls within policy"
+  },
+  {
+   "trace_id": "974062dc7ad2621aad5ccf62fb2fdbb5",
+   "scenario": "retail-16",
+   "check": "repeated_call",
+   "detected": false,
+   "confidence": 1.0,
+   "reason": "no repeated calls without progress"
+  },
+  {
+   "trace_id": "974062dc7ad2621aad5ccf62fb2fdbb5",
+   "scenario": "retail-16",
+   "check": "unrecovered_tool_error",
+   "detected": true,
+   "confidence": 1.0,
+   "reason": "Tool 'find_user_id_by_email' failed at step 1 (Response starts with 'Error:') and no subsequent call to 'find_user_id_by_email' succeeded."
+  },
+  {
+   "trace_id": "974062dc7ad2621aad5ccf62fb2fdbb5",
+   "scenario": "retail-16",
+   "check": "context_overflow",
+   "detected": false,
+   "confidence": 1.0,
+   "reason": "no context overflow or token cutoff"
+  },
+  {
+   "trace_id": "f8cf6fd29a62065f7758d8579392c3ed",
+   "scenario": "retail-17",
+   "check": "search_loop",
+   "detected": false,
+   "confidence": 1.0,
+   "reason": "answered"
+  },
+  {
+   "trace_id": "f8cf6fd29a62065f7758d8579392c3ed",
+   "scenario": "retail-17",
+   "check": "abstention",
+   "detected": false,
+   "confidence": 1.0,
+   "reason": "answer does not abstain"
+  },
+  {
+   "trace_id": "f8cf6fd29a62065f7758d8579392c3ed",
+   "scenario": "retail-17",
+   "check": "policy",
+   "detected": false,
+   "confidence": 1.0,
+   "reason": "3 calls within policy"
+  },
+  {
+   "trace_id": "f8cf6fd29a62065f7758d8579392c3ed",
+   "scenario": "retail-17",
+   "check": "repeated_call",
+   "detected": false,
+   "confidence": 1.0,
+   "reason": "no repeated calls without progress"
+  },
+  {
+   "trace_id": "f8cf6fd29a62065f7758d8579392c3ed",
+   "scenario": "retail-17",
+   "check": "unrecovered_tool_error",
+   "detected": false,
+   "confidence": 1.0,
+   "reason": "no unrecovered tool errors"
+  },
+  {
+   "trace_id": "f8cf6fd29a62065f7758d8579392c3ed",
+   "scenario": "retail-17",
+   "check": "context_overflow",
+   "detected": false,
+   "confidence": 1.0,
+   "reason": "no context overflow or token cutoff"
+  },
+  {
+   "trace_id": "e058f9be20d72c97aa15a745f024edee",
+   "scenario": "retail-18",
+   "check": "search_loop",
+   "detected": false,
+   "confidence": 1.0,
+   "reason": "answered"
+  },
+  {
+   "trace_id": "e058f9be20d72c97aa15a745f024edee",
+   "scenario": "retail-18",
+   "check": "abstention",
+   "detected": false,
+   "confidence": 1.0,
+   "reason": "answer does not abstain"
+  },
+  {
+   "trace_id": "e058f9be20d72c97aa15a745f024edee",
+   "scenario": "retail-18",
+   "check": "policy",
+   "detected": false,
+   "confidence": 1.0,
+   "reason": "5 calls within policy"
+  },
+  {
+   "trace_id": "e058f9be20d72c97aa15a745f024edee",
+   "scenario": "retail-18",
+   "check": "repeated_call",
+   "detected": false,
+   "confidence": 1.0,
+   "reason": "no repeated calls without progress"
+  },
+  {
+   "trace_id": "e058f9be20d72c97aa15a745f024edee",
+   "scenario": "retail-18",
+   "check": "unrecovered_tool_error",
+   "detected": false,
+   "confidence": 1.0,
+   "reason": "no unrecovered tool errors"
+  },
+  {
+   "trace_id": "e058f9be20d72c97aa15a745f024edee",
+   "scenario": "retail-18",
+   "check": "context_overflow",
+   "detected": false,
+   "confidence": 1.0,
+   "reason": "no context overflow or token cutoff"
+  },
+  {
+   "trace_id": "4cc6470c1816b795bd1b42e0f9e614af",
+   "scenario": "retail-19",
+   "check": "search_loop",
+   "detected": false,
+   "confidence": 1.0,
+   "reason": "answered"
+  },
+  {
+   "trace_id": "4cc6470c1816b795bd1b42e0f9e614af",
+   "scenario": "retail-19",
+   "check": "abstention",
+   "detected": false,
+   "confidence": 1.0,
+   "reason": "answer does not abstain"
+  },
+  {
+   "trace_id": "4cc6470c1816b795bd1b42e0f9e614af",
+   "scenario": "retail-19",
+   "check": "policy",
+   "detected": false,
+   "confidence": 1.0,
+   "reason": "7 calls within policy"
+  },
+  {
+   "trace_id": "4cc6470c1816b795bd1b42e0f9e614af",
+   "scenario": "retail-19",
+   "check": "repeated_call",
+   "detected": false,
+   "confidence": 1.0,
+   "reason": "no repeated calls without progress"
+  },
+  {
+   "trace_id": "4cc6470c1816b795bd1b42e0f9e614af",
+   "scenario": "retail-19",
+   "check": "unrecovered_tool_error",
+   "detected": false,
+   "confidence": 1.0,
+   "reason": "no unrecovered tool errors"
+  },
+  {
+   "trace_id": "4cc6470c1816b795bd1b42e0f9e614af",
+   "scenario": "retail-19",
+   "check": "context_overflow",
+   "detected": false,
+   "confidence": 1.0,
+   "reason": "no context overflow or token cutoff"
+  },
+  {
+   "trace_id": "e3f1c31efa7fa8df34b49ddb215b6524",
+   "scenario": "retail-21",
+   "check": "search_loop",
+   "detected": false,
+   "confidence": 1.0,
+   "reason": "answered"
+  },
+  {
+   "trace_id": "e3f1c31efa7fa8df34b49ddb215b6524",
+   "scenario": "retail-21",
+   "check": "abstention",
+   "detected": false,
+   "confidence": 1.0,
+   "reason": "answer does not abstain"
+  },
+  {
+   "trace_id": "e3f1c31efa7fa8df34b49ddb215b6524",
+   "scenario": "retail-21",
+   "check": "policy",
+   "detected": false,
+   "confidence": 1.0,
+   "reason": "12 calls within policy"
+  },
+  {
+   "trace_id": "e3f1c31efa7fa8df34b49ddb215b6524",
+   "scenario": "retail-21",
+   "check": "repeated_call",
+   "detected": false,
+   "confidence": 1.0,
+   "reason": "no repeated calls without progress"
+  },
+  {
+   "trace_id": "e3f1c31efa7fa8df34b49ddb215b6524",
+   "scenario": "retail-21",
+   "check": "unrecovered_tool_error",
+   "detected": false,
+   "confidence": 1.0,
+   "reason": "no unrecovered tool errors"
+  },
+  {
+   "trace_id": "e3f1c31efa7fa8df34b49ddb215b6524",
+   "scenario": "retail-21",
+   "check": "context_overflow",
+   "detected": false,
+   "confidence": 1.0,
+   "reason": "no context overflow or token cutoff"
+  }
+ ]
+}
\ No newline at end of file
diff --git a/evals/tau2_retail/artifacts/retail_50_first10/outcomes.json b/evals/tau2_retail/artifacts/retail_50_first10/outcomes.json
new file mode 100644
index 0000000..9d11066
--- /dev/null
+++ b/evals/tau2_retail/artifacts/retail_50_first10/outcomes.json
@@ -0,0 +1,12 @@
+{
+  "retail-6": true,
+  "retail-8": true,
+  "retail-11": true,
+  "retail-13": true,
+  "retail-14": true,
+  "retail-16": true,
+  "retail-17": true,
+  "retail-18": false,
+  "retail-19": true,
+  "retail-21": true
+}
\ No newline at end of file
diff --git a/evals/tau2_retail/artifacts/retail_50_first10/precheck.txt b/evals/tau2_retail/artifacts/retail_50_first10/precheck.txt
new file mode 100644
index 0000000..8d40488
--- /dev/null
+++ b/evals/tau2_retail/artifacts/retail_50_first10/precheck.txt
@@ -0,0 +1,3 @@
+policy keys: allow, max_calls_per_arg, required_args, requires (after, invalidated_by, latest, result, same_arg, success, tool), values
+precheck: OK - format otlp - checked 10 of 10 traces - 64 tool steps read - 0 error(s), 0 warning(s)
+EXIT=0
diff --git a/evals/tau2_retail/artifacts/retail_50_first10/report-with-outcomes.md b/evals/tau2_retail/artifacts/retail_50_first10/report-with-outcomes.md
new file mode 100644
index 0000000..42fc1ed
--- /dev/null
+++ b/evals/tau2_retail/artifacts/retail_50_first10/report-with-outcomes.md
@@ -0,0 +1,30 @@
+<!-- faultgate -->
+## faultgate: FAIL
+
+2/10 traces failed · judge none · redaction builtin
+
+**Outcome:** 9/10 true (0.90) · 0 without an outcome · structural clean rate 0.90
+
+| check | fired |
+|---|---|
+| search_loop | 0 |
+| abstention | 0 |
+| policy | 0 |
+| repeated_call | 0 |
+| unrecovered_tool_error | 1 |
+| context_overflow | 0 |
+| outcome | 1 |
+
+### Failing traces
+
+| scenario | trace | check | reason |
+|---|---|---|---|
+| retail-16 | `974062dc7ad2` | unrecovered_tool_error | Tool 'find_user_id_by_email' failed at step 1 (Response starts with 'Error:') and no subsequent call to 'find_user_id_by_email' succeeded. |
+| retail-18 | `e058f9be20d7` | outcome | outcome false in the outcomes file |
+
+### Reproduce locally
+
+```sh
+pip install 'faultgate==0.4.1'
+faultgate check faultgate/evals/tau2_retail/artifacts/retail_50_first10/traces.json --policy policy_retail.json --outcomes faultgate/evals/tau2_retail/artifacts/retail_50_first10/outcomes.json
+```
diff --git a/evals/tau2_retail/artifacts/retail_50_first10/results.json b/evals/tau2_retail/artifacts/retail_50_first10/results.json
new file mode 100644
index 0000000..6c4e9ae
--- /dev/null
+++ b/evals/tau2_retail/artifacts/retail_50_first10/results.json
@@ -0,0 +1,1527 @@
+{
+  "tau2_commit": "7aad81c37a3a78b4ed3e4866769f851400c64415",
+  "model": "openai/qwen3.8-flash",
+  "user_model": "openai/qwen3.8-flash",
+  "task_ids": [
+    "6",
+    "8",
+    "11",
+    "13",
+    "14",
+    "16",
+    "17",
+    "18",
+    "19",
+    "21"
+  ],
+  "generated_at": "2026-10-29T20:58:10Z",
+  "wall_s": 738.419,
+  "tasks": [
+    {
+      "task_id": "6",
+      "purpose": "You want to exchange the water bottle and the desk lamp. You want to exchange the water bottle to a bigger one, and the desk lamp to a less bright one (prefer battery > USB > AC). If the agent asks for confirmation, only exchange the desk lamp.",
+      "reward": 1.0,
+      "termination_reason": "TerminationReason.USER_STOP",
+      "duration_s": 94.919,
+      "answer": "Your exchange has been processed successfully. Here's the confirmation:\n\n**Order #W6390527** \u2014 status: **exchange requested**\n\n| | Details |\n|---|---|\n| Exchanging | Desk Lamp: white / medium brightness / USB |\n| New item | Desk Lamp: silver / low brightness / battery (item #7453605304) |\n| Price difference | $12.07 charged to your PayPal account |\n| Unchanged | Water Bottle (500ml / glass / black) and Hiking Boots |\n\nYou'll receive an email shortly with instructions on how and where to return the original desk lamp. Is there anything else I can help you with?",
+      "reward_info": {
+        "reward": 1.0,
+        "db_check": {
+          "db_match": true,
+          "db_reward": 1.0
+        },
+        "env_assertions": [],
+        "action_checks": [
+          {
+            "action": {
+              "action_id": "6_0",
+              "requestor": "assistant",
+              "name": "find_user_id_by_name_zip",
+              "arguments": {
+                "first_name": "Mei",
+                "last_name": "Kovacs",
+                "zip": "28236"
+              },
+              "info": null,
+              "compare_args": null
+            },
+            "action_match": true,
+            "action_reward": 1.0,
+            "tool_type": "read"
+          },
+          {
+            "action": {
+              "action_id": "6_1",
+              "requestor": "assistant",
+              "name": "get_user_details",
+              "arguments": {
+                "user_id": "mei_kovacs_8020"
+              },
+              "info": null,
+              "compare_args": null
+            },
+            "action_match": true,
+            "action_reward": 1.0,
+            "tool_type": "read"
+          },
+          {
+            "action": {
+              "action_id": "6_2",
+              "requestor": "assistant",
+              "name": "get_order_details",
+              "arguments": {
+                "order_id": "#W6390527"
+              },
+              "info": null,
+              "compare_args": null
+            },
+            "action_match": true,
+            "action_reward": 1.0,
+            "tool_type": "read"
+          },
+          {
+            "action": {
+              "action_id": "6_3",
+              "requestor": "assistant",
+              "name": "get_product_details",
+              "arguments": {
+                "product_id": "8310926033"
+              },
+              "info": null,
+              "compare_args": null
+            },
+            "action_match": true,
+            "action_reward": 1.0,
+            "tool_type": "read"
+          },
+          {
+            "action": {
+              "action_id": "6_4",
+              "requestor": "assistant",
+              "name": "get_product_details",
+              "arguments": {
+                "product_id": "6817146515"
+              },
+              "info": null,
+              "compare_args": null
+            },
+            "action_match": true,
+            "action_reward": 1.0,
+            "tool_type": "read"
+          },
+          {
+            "action": {
+              "action_id": "6_5",
+              "requestor": "assistant",
+              "name": "exchange_delivered_order_items",
+              "arguments": {
+                "order_id": "#W6390527",
+                "item_ids": [
+                  "8384507844"
+                ],
+                "new_item_ids": [
+                  "7453605304"
+                ],
+                "payment_method_id": "paypal_7644869"
+              },
+              "info": null,
+              "compare_args": null
+            },
+            "action_match": true,
+            "action_reward": 1.0,
+            "tool_type": "write"
+          }
+        ],
+        "nl_assertions": [],
+        "communicate_checks": null,
+        "reward_basis": [
+          "DB",
+          "NL_ASSERTION"
+        ],
+        "reward_breakdown": {
+          "DB": 1.0,
+          "NL_ASSERTION": 1.0
+        },
+        "info": {
+          "env": null,
+          "nl": {
+            "note": "No nl_assertions to evaluate"
+          },
+          "communicate": null,
+          "action": null
+        }
+      },
+      "tool_steps": 6,
+      "wall_s": 95.095,
+      "authenticated_user_id": "mei_kovacs_8020"
+    },
+    {
+      "task_id": "8",
+      "purpose": "You want to exchange the water bottle and the desk lamp. You want to exchange the water bottle to a bigger one, and the desk lamp to a brighter one (prefer battery > USB > AC). If the agent asks for confirmation, only exchange the desk lamp.",
+      "reward": 1.0,
+      "termination_reason": "TerminationReason.USER_STOP",
+      "duration_s": 69.011,
+      "answer": "Your exchange has been processed successfully. \u2705\n\n**Order #W6390527 \u2014 status: exchange requested**\n\n| | Details |\n|---|---|\n| Exchanged | Desk Lamp (8384507844) white / medium / USB \u2192 **Desk Lamp (9083642334) white / high / USB** |\n| Price difference | **$26.34** charged to your PayPal account (paypal_7644869) |\n| Unchanged | Water Bottle (500ml / glass / black), Hiking Boots (size 10 / synthetic / waterproof) |\n\nYou'll receive an email shortly with instructions on how and where to return the original desk lamp.\n\nIs there anything else I can help you with?",
+      "reward_info": {
+        "reward": 1.0,
+        "db_check": {
+          "db_match": true,
+          "db_reward": 1.0
+        },
+        "env_assertions": [],
+        "action_checks": [
+          {
+            "action": {
+              "action_id": "8_0",
+              "requestor": "assistant",
+              "name": "find_user_id_by_name_zip",
+              "arguments": {
+                "first_name": "Mei",
+                "last_name": "Kovacs",
+                "zip": "28236"
+              },
+              "info": null,
+              "compare_args": null
+            },
+            "action_match": true,
+            "action_reward": 1.0,
+            "tool_type": "read"
+          },
+          {
+            "action": {
+              "action_id": "8_1",
+              "requestor": "assistant",
+              "name": "get_user_details",
+              "arguments": {
+                "user_id": "mei_kovacs_8020"
+              },
+              "info": null,
+              "compare_args": null
+            },
+            "action_match": true,
+            "action_reward": 1.0,
+            "tool_type": "read"
+          },
+          {
+            "action": {
+              "action_id": "8_2",
+              "requestor": "assistant",
+              "name": "get_order_details",
+              "arguments": {
+                "order_id": "#W6390527"
+              },
+              "info": null,
+              "compare_args": null
+            },
+            "action_match": true,
+            "action_reward": 1.0,
+            "tool_type": "read"
+          },
+          {
+            "action": {
+              "action_id": "8_3",
+              "requestor": "assistant",
+              "name": "get_product_details",
+              "arguments": {
+                "product_id": "8310926033"
+              },
+              "info": null,
+              "compare_args": null
+            },
+            "action_match": false,
+            "action_reward": 0.0,
+            "tool_type": "read"
+          },
+          {
+            "action": {
+              "action_id": "8_4",
+              "requestor": "assistant",
+              "name": "get_product_details",
+              "arguments": {
+                "product_id": "6817146515"
+              },
+              "info": null,
+              "compare_args": null
+            },
+            "action_match": true,
+            "action_reward": 1.0,
+            "tool_type": "read"
+          },
+          {
+            "action": {
+              "action_id": "8_5",
+              "requestor": "assistant",
+              "name": "exchange_delivered_order_items",
+              "arguments": {
+                "order_id": "#W6390527",
+                "item_ids": [
+                  "8384507844"
+                ],
+                "new_item_ids": [
+                  "9083642334"
+                ],
+                "payment_method_id": "paypal_7644869"
+              },
+              "info": null,
+              "compare_args": null
+            },
+            "action_match": true,
+            "action_reward": 1.0,
+            "tool_type": "write"
+          }
+        ],
+        "nl_assertions": [],
+        "communicate_checks": null,
+        "reward_basis": [
+          "DB",
+          "NL_ASSERTION"
+        ],
+        "reward_breakdown": {
+          "DB": 1.0,
+          "NL_ASSERTION": 1.0
+        },
+        "info": {
+          "env": null,
+          "nl": {
+            "note": "No nl_assertions to evaluate"
+          },
+          "communicate": null,
+          "action": null
+        }
+      },
+      "tool_steps": 5,
+      "wall_s": 69.183,
+      "authenticated_user_id": "mei_kovacs_8020"
+    },
+    {
+      "task_id": "11",
+      "purpose": "For some reason, you want to return all things ordered. You have two payment methods and two orders, and you want to refund each order to the other order's payment method. If not possible, you are angry and swear for a few times, then agree to return all things with the original payment method.",
+      "reward": 1.0,
+      "termination_reason": "TerminationReason.USER_STOP",
+      "duration_s": 80.938,
+      "answer": "Both returns are submitted.\n\n**Order #W5490111** \u2014 status: return requested\nAll 4 items (Water Bottle, Mechanical Keyboard, Action Camera, Backpack) \u2192 **$1,023.16** back to your Visa ending 7285\n\n**Order #W7387996** \u2014 status: return requested\nGaming Mouse \u2192 **$158.89** back to your PayPal account\n\nYou'll get an email at mia.garcia2723@example.com with instructions on how and where to ship the items back. Card refunds typically take 5\u20137 business days to appear.\n\nAnd apologies for the runaround on the refund routing \u2014 the restriction is on my end, not something I could override. Anything else I can do for you?",
+      "reward_info": {
+        "reward": 1.0,
+        "db_check": {
+          "db_match": true,
+          "db_reward": 1.0
+        },
+        "env_assertions": [],
+        "action_checks": [
+          {
+            "action": {
+              "action_id": "11_0",
+              "requestor": "assistant",
+              "name": "find_user_id_by_email",
+              "arguments": {
+                "email": "mia.garcia2723@example.com"
+              },
+              "info": null,
+              "compare_args": null
+            },
+            "action_match": true,
+            "action_reward": 1.0,
+            "tool_type": "read"
+          },
+          {
+            "action": {
+              "action_id": "11_1",
+              "requestor": "assistant",
+              "name": "get_user_details",
+              "arguments": {
+                "user_id": "mia_garcia_4516"
+              },
+              "info": null,
+              "compare_args": null
+            },
+            "action_match": true,
+            "action_reward": 1.0,
+            "tool_type": "read"
+          },
+          {
+            "action": {
+              "action_id": "11_2",
+              "requestor": "assistant",
+              "name": "get_order_details",
+              "arguments": {
+                "order_id": "#W5490111"
+              },
+              "info": null,
+              "compare_args": null
+            },
+            "action_match": true,
+            "action_reward": 1.0,
+            "tool_type": "read"
+          },
+          {
+            "action": {
+              "action_id": "11_3",
+              "requestor": "assistant",
+              "name": "get_order_details",
+              "arguments": {
+                "order_id": "#W7387996"
+              },
+              "info": null,
+              "compare_args": null
+            },
+            "action_match": true,
+            "action_reward": 1.0,
+            "tool_type": "read"
+          },
+          {
+            "action": {
+              "action_id": "11_4",
+              "requestor": "assistant",
+              "name": "return_delivered_order_items",
+              "arguments": {
+                "order_id": "#W5490111",
+                "item_ids": [
+                  "4579334072",
+                  "1421289881",
+                  "6117189161",
+                  "4947717507"
+                ],
+                "payment_method_id": "credit_card_3124723"
+              },
+              "info": null,
+              "compare_args": null
+            },
+            "action_match": true,
+            "action_reward": 1.0,
+            "tool_type": "write"
+          },
+          {
+            "action": {
+              "action_id": "11_5",
+              "requestor": "assistant",
+              "name": "return_delivered_order_items",
+              "arguments": {
+                "order_id": "#W7387996",
+                "item_ids": [
+                  "5796612084"
+                ],
+                "payment_method_id": "paypal_9497703"
+              },
+              "info": null,
+              "compare_args": null
+            },
+            "action_match": true,
+            "action_reward": 1.0,
+            "tool_type": "write"
+          }
+        ],
+        "nl_assertions": [],
+        "communicate_checks": null,
+        "reward_basis": [
+          "DB",
+          "NL_ASSERTION"
+        ],
+        "reward_breakdown": {
+          "DB": 1.0,
+          "NL_ASSERTION": 1.0
+        },
+        "info": {
+          "env": null,
+          "nl": {
+            "note": "No nl_assertions to evaluate"
+          },
+          "communicate": null,
+          "action": null
+        }
+      },
+      "tool_steps": 6,
+      "wall_s": 81.115,
+      "authenticated_user_id": "mia_garcia_4516"
+    },
+    {
+      "task_id": "13",
+      "purpose": "You just got into gaming and want to cancel or return everything not associated with it. (Everything except a keyboard and a mouse, but do not reveal it to the agent). PayPal is prefered for refund, but otherwise credit card can be accepted.",
+      "reward": 1.0,
+      "termination_reason": "TerminationReason.USER_STOP",
+      "duration_s": 79.588,
+      "answer": "Done \u2014 the return has been requested for the following items from order **#W5490111**:\n\n- Water Bottle \u2014 $54.85  \n- Action Camera \u2014 $481.50  \n- Backpack \u2014 $218.04  \n\n**Total refund: $754.39**, to be sent to your Visa credit card ending in **7285**, estimated within **5\u20137 business days**.\n\nThe Mechanical Keyboard will remain on the order. You\u2019ll also receive an email with return instructions and where to send the items.",
+      "reward_info": {
+        "reward": 1.0,
+        "db_check": {
+          "db_match": true,
+          "db_reward": 1.0
+        },
+        "env_assertions": [],
+        "action_checks": [
+          {
+            "action": {
+              "action_id": "13_0",
+              "requestor": "assistant",
+              "name": "find_user_id_by_email",
+              "arguments": {
+                "email": "mia.garcia2723@example.com"
+              },
+              "info": null,
+              "compare_args": null
+            },
+            "action_match": true,
+            "action_reward": 1.0,
+            "tool_type": "read"
+          },
+          {
+            "action": {
+              "action_id": "13_1",
+              "requestor": "assistant",
+              "name": "get_user_details",
+              "arguments": {
+                "user_id": "mia_garcia_4516"
+              },
+              "info": null,
+              "compare_args": null
+            },
+            "action_match": true,
+            "action_reward": 1.0,
+            "tool_type": "read"
+          },
+          {
+            "action": {
+              "action_id": "13_2",
+              "requestor": "assistant",
+              "name": "get_order_details",
+              "arguments": {
+                "order_id": "#W5490111"
+              },
+              "info": null,
+              "compare_args": null
+            },
+            "action_match": true,
+            "action_reward": 1.0,
+            "tool_type": "read"
+          },
+          {
+            "action": {
+              "action_id": "13_3",
+              "requestor": "assistant",
+              "name": "get_order_details",
+              "arguments": {
+                "order_id": "#W7387996"
+              },
+              "info": null,
+              "compare_args": null
+            },
+            "action_match": true,
+            "action_reward": 1.0,
+            "tool_type": "read"
+          },
+          {
+            "action": {
+              "action_id": "13_4",
+              "requestor": "assistant",
+              "name": "return_delivered_order_items",
+              "arguments": {
+                "order_id": "#W5490111",
+                "item_ids": [
+                  "4579334072",
+                  "6117189161",
+                  "4947717507"
+                ],
+                "payment_method_id": "credit_card_3124723"
+              },
+              "info": null,
+              "compare_args": null
+            },
+            "action_match": true,
+            "action_reward": 1.0,
+            "tool_type": "write"
+          }
+        ],
+        "nl_assertions": [],
+        "communicate_checks": null,
+        "reward_basis": [
+          "DB",
+          "NL_ASSERTION"
+        ],
+        "reward_breakdown": {
+          "DB": 1.0,
+          "NL_ASSERTION": 1.0
+        },
+        "info": {
+          "env": null,
+          "nl": {
+            "note": "No nl_assertions to evaluate"
+          },
+          "communicate": null,
+          "action": null
+        }
+      },
+      "tool_steps": 5,
+      "wall_s": 79.868,
+      "authenticated_user_id": "mia_garcia_4516"
+    },
+    {
+      "task_id": "14",
+      "purpose": "You just quit gaming and want to cancel or return everything associated with it. (It's just a keyboard and a mouse, but do not reveal it to the agent). Original payment is preferred.",
+      "reward": 1.0,
+      "termination_reason": "TerminationReason.USER_STOP",
+      "duration_s": 64.444,
+      "answer": "Both returns are submitted \u2705\n\n| Order | Item | Refund | Destination |\n|---|---|---|---|\n| #W5490111 | Mechanical Keyboard | $268.77 | Visa ending 7285 |\n| #W7387996 | Gaming Mouse | $158.89 | PayPal |\n\nTotal refund: **$427.66**\n\nBoth orders are now marked **\"return requested\"**, and you'll receive an email with instructions on how and where to send the items back. Refunds typically process after the items are received.\n\nYour other items in #W5490111 (water bottle, action camera, backpack) remain untouched. Good luck with your studies!",
+      "reward_info": {
+        "reward": 1.0,
+        "db_check": {
+          "db_match": true,
+          "db_reward": 1.0
+        },
+        "env_assertions": [],
+        "action_checks": [
+          {
+            "action": {
+              "action_id": "14_0",
+              "requestor": "assistant",
+              "name": "find_user_id_by_email",
+              "arguments": {
+                "email": "mia.garcia2723@example.com"
+              },
+              "info": null,
+              "compare_args": null
+            },
+            "action_match": true,
+            "action_reward": 1.0,
+            "tool_type": "read"
+          },
+          {
+            "action": {
+              "action_id": "14_1",
+              "requestor": "assistant",
+              "name": "get_user_details",
+              "arguments": {
+                "user_id": "mia_garcia_4516"
+              },
+              "info": null,
+              "compare_args": null
+            },
+            "action_match": true,
+            "action_reward": 1.0,
+            "tool_type": "read"
+          },
+          {
+            "action": {
+              "action_id": "14_2",
+              "requestor": "assistant",
+              "name": "get_order_details",
+              "arguments": {
+                "order_id": "#W5490111"
+              },
+              "info": null,
+              "compare_args": null
+            },
+            "action_match": true,
+            "action_reward": 1.0,
+            "tool_type": "read"
+          },
+          {
+            "action": {
+              "action_id": "14_3",
+              "requestor": "assistant",
+              "name": "get_order_details",
+              "arguments": {
+                "order_id": "#W7387996"
+              },
+              "info": null,
+              "compare_args": null
+            },
+            "action_match": true,
+            "action_reward": 1.0,
+            "tool_type": "read"
+          },
+          {
+            "action": {
+              "action_id": "14_4",
+              "requestor": "assistant",
+              "name": "return_delivered_order_items",
+              "arguments": {
+                "order_id": "#W5490111",
+                "item_ids": [
+                  "1421289881"
+                ],
+                "payment_method_id": "credit_card_3124723"
+              },
+              "info": null,
+              "compare_args": null
+            },
+            "action_match": true,
+            "action_reward": 1.0,
+            "tool_type": "write"
+          },
+          {
+            "action": {
+              "action_id": "14_5",
+              "requestor": "assistant",
+              "name": "return_delivered_order_items",
+              "arguments": {
+                "order_id": "#W7387996",
+                "item_ids": [
+                  "5796612084"
+                ],
+                "payment_method_id": "paypal_9497703"
+              },
+              "info": null,
+              "compare_args": null
+            },
+            "action_match": true,
+            "action_reward": 1.0,
+            "tool_type": "write"
+          }
+        ],
+        "nl_assertions": [],
+        "communicate_checks": null,
+        "reward_basis": [
+          "DB",
+          "NL_ASSERTION"
+        ],
+        "reward_breakdown": {
+          "DB": 1.0,
+          "NL_ASSERTION": 1.0
+        },
+        "info": {
+          "env": null,
+          "nl": {
+            "note": "No nl_assertions to evaluate"
+          },
+          "communicate": null,
+          "action": null
+        }
+      },
+      "tool_steps": 6,
+      "wall_s": 64.613,
+      "authenticated_user_id": "mia_garcia_4516"
+    },
+    {
+      "task_id": "16",
+      "purpose": "You want to cancel all pending orders (since they are no longer needed) and return the watch you have received (but nothing else), and you want to know the total amount you can get back.",
+      "reward": 1.0,
+      "termination_reason": "TerminationReason.USER_STOP",
+      "duration_s": 63.582,
+      "answer": "All done. \u2705\n\n**Completed actions:**\n- **#W5199551** \u2014 cancelled (no longer needed) \u2192 $3,131.10 refund to PayPal\n- **#W8665881** \u2014 cancelled (no longer needed) \u2192 $4,777.75 refund to PayPal\n- **#W9389413** \u2014 return requested for Smart Watch (item 2554056026) only \u2192 $367.38 refund to PayPal\n\n**Total refund across everything: $8,276.23**, all going back to your PayPal account (paypal_5364164).\n\nA couple of notes:\n- The cancellation refunds will appear in **5\u20137 business days** since PayPal isn't an instant-refund method.\n- You'll receive an email shortly with instructions on how and where to ship back the Smart Watch. The other three items from that order (Hiking Boots, Mechanical Keyboard, T-Shirt) stay with you \u2014 no action needed.",
+      "reward_info": {
+        "reward": 1.0,
+        "db_check": {
+          "db_match": true,
+          "db_reward": 1.0
+        },
+        "env_assertions": [],
+        "action_checks": [
+          {
+            "action": {
+              "action_id": "16_0",
+              "requestor": "assistant",
+              "name": "find_user_id_by_name_zip",
+              "arguments": {
+                "first_name": "Fatima",
+                "last_name": "Johnson",
+                "zip": "78712"
+              },
+              "info": null,
+              "compare_args": null
+            },
+            "action_match": true,
+            "action_reward": 1.0,
+            "tool_type": "read"
+          },
+          {
+            "action": {
+              "action_id": "16_1",
+              "requestor": "assistant",
+              "name": "get_user_details",
+              "arguments": {
+                "user_id": "fatima_johnson_7581"
+              },
+              "info": null,
+              "compare_args": null
+            },
+            "action_match": true,
+            "action_reward": 1.0,
+            "tool_type": "read"
+          },
+          {
+            "action": {
+              "action_id": "16_2",
+              "requestor": "assistant",
+              "name": "get_order_details",
+              "arguments": {
+                "order_id": "#W5199551"
+              },
+              "info": null,
+              "compare_args": null
+            },
+            "action_match": true,
+            "action_reward": 1.0,
+            "tool_type": "read"
+          },
+          {
+            "action": {
+              "action_id": "16_3",
+              "requestor": "assistant",
+              "name": "get_order_details",
+              "arguments": {
+                "order_id": "#W8665881"
+              },
+              "info": null,
+              "compare_args": null
+            },
+            "action_match": true,
+            "action_reward": 1.0,
+            "tool_type": "read"
+          },
+          {
+            "action": {
+              "action_id": "16_4",
+              "requestor": "assistant",
+              "name": "get_order_details",
+              "arguments": {
+                "order_id": "#W9389413"
+              },
+              "info": null,
+              "compare_args": null
+            },
+            "action_match": true,
+            "action_reward": 1.0,
+            "tool_type": "read"
+          },
+          {
+            "action": {
+              "action_id": "16_5",
+              "requestor": "assistant",
+              "name": "calculate",
+              "arguments": {
+                "expression": "3131.1 + 4777.75 + 367.38"
+              },
+              "info": null,
+              "compare_args": null
+            },
+            "action_match": false,
+            "action_reward": 0.0,
+            "tool_type": "generic"
+          },
+          {
+            "action": {
+              "action_id": "16_6",
+              "requestor": "assistant",
+              "name": "cancel_pending_order",
+              "arguments": {
+                "order_id": "#W5199551",
+                "reason": "no longer needed"
+              },
+              "info": null,
+              "compare_args": null
+            },
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+              "requestor": "assistant",
+              "name": "cancel_pending_order",
+              "arguments": {
+                "order_id": "#W8665881",
+                "reason": "no longer needed"
+              },
+              "info": null,
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+            },
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+          },
+          {
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+              "requestor": "assistant",
+              "name": "return_delivered_order_items",
+              "arguments": {
+                "order_id": "#W9389413",
+                "item_ids": [
+                  "2554056026"
+                ],
+                "payment_method_id": "paypal_5364164"
+              },
+              "info": null,
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+            },
+            "action_match": true,
+            "action_reward": 1.0,
+            "tool_type": "write"
+          }
+        ],
+        "nl_assertions": [
+          {
+            "nl_assertion": "Agent should tell the user the total refund amount is $8,276.23.",
+            "met": true,
+            "justification": "The assistant explicitly stated that the total refund amount is $8,276.23 and that it will go to the user's PayPal account."
+          }
+        ],
+        "communicate_checks": null,
+        "reward_basis": [
+          "DB",
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+      },
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+    },
+    {
+      "task_id": "17",
+      "purpose": "You want to change #W8665881 to be delivered to Suite 641 instead.",
+      "reward": 1.0,
+      "termination_reason": "TerminationReason.USER_STOP",
+      "duration_s": 32.604,
+      "answer": "Done! The delivery address for order #W8665881 has been updated to:\n\n- 123 Elm Street, **Suite 641**, Austin, TX, USA, 78712\n\nIs there anything else I can help you with?",
+      "reward_info": {
+        "reward": 1.0,
+        "db_check": {
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+          "db_reward": 1.0
+        },
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+              "requestor": "assistant",
+              "name": "find_user_id_by_name_zip",
+              "arguments": {
+                "first_name": "Fatima",
+                "last_name": "Johnson",
+                "zip": "78712"
+              },
+              "info": null,
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+            },
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+          },
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+              "name": "get_user_details",
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+                "user_id": "fatima_johnson_7581"
+              },
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+            },
+            "action_match": false,
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+          {
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+              "arguments": {
+                "order_id": "#W8665881"
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+          },
+          {
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+            },
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+          {
+            "action": {
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+              "requestor": "assistant",
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+              "arguments": {
+                "order_id": "#W8665881",
+                "address1": "123 Elm Street",
+                "address2": "Suite 641",
+                "city": "Austin",
+                "state": "TX",
+                "country": "USA",
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+              },
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+            },
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+        }
+      },
+      "tool_steps": 3,
+      "wall_s": 32.782,
+      "authenticated_user_id": "fatima_johnson_7581"
+    },
+    {
+      "task_id": "18",
+      "purpose": "You want to return the office chair because it came with some broken pieces. But if the agent asks you for confirm, you say you want to rethink for a while, and then change your mind to exchange for the same item. If the agent mentions that the same product is not available, ask for a gray office chair with fixed armrest made of leather instead.",
+      "reward": 0.0,
+      "termination_reason": "TerminationReason.USER_STOP",
+      "duration_s": 45.389,
+      "answer": "Understood \u2014 an **exchange** (replacement chair) instead of a return. Here are the details for order **#W2890441** (status: delivered):\n\n- **Item being exchanged:** 8069050545 \u2014 Office Chair, leather, blue, no armrests, high-back ($499.28)\n- **New item:** 8069050545 \u2014 the exact same chair, currently **in stock**\n- **Price difference:** $0.00 (nothing extra to pay)\n- **Payment method for any difference:** Mastercard ending in 1037\n\nTwo things to note before we proceed:\n1. An exchange can only be done **once** per order, so this will replace the broken chair with a new identical one and no further exchanges/returns will be possible on this order.\n2. After confirming, the order status becomes **\"exchange requested\"** and you'll receive an email with instructions on how to send back the broken chair and its pieces.\n\nShall I go ahead and request the exchange of the office chair (8069050545) for the same chair? **(yes/no)**",
+      "reward_info": {
+        "reward": 0.0,
+        "db_check": {
+          "db_match": false,
+          "db_reward": 0.0
+        },
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+            "action": {
+              "action_id": "18_0",
+              "requestor": "assistant",
+              "name": "find_user_id_by_name_zip",
+              "arguments": {
+                "first_name": "Mei",
+                "last_name": "Davis",
+                "zip": "80217"
+              },
+              "info": null,
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+            },
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+              },
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+              "name": "get_order_details",
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+                "order_id": "#W2890441"
+              },
+              "info": null,
+              "compare_args": null
+            },
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+          {
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+              "requestor": "assistant",
+              "name": "get_product_details",
+              "arguments": {
+                "product_id": "4794339885"
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+              "info": null,
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+            },
+            "action_match": true,
+            "action_reward": 1.0,
+            "tool_type": "read"
+          },
+          {
+            "action": {
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+              "requestor": "assistant",
+              "name": "exchange_delivered_order_items",
+              "arguments": {
+                "order_id": "#W2890441",
+                "item_ids": [
+                  "8069050545"
+                ],
+                "new_item_ids": [
+                  "1071497737"
+                ],
+                "payment_method_id": "credit_card_1061405"
+              },
+              "info": null,
+              "compare_args": null
+            },
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+            "tool_type": "write"
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+        "reward_breakdown": {
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+          "NL_ASSERTION": 1.0
+        },
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+            "note": "No nl_assertions to evaluate"
+          },
+          "communicate": null,
+          "action": null
+        }
+      },
+      "tool_steps": 5,
+      "wall_s": 45.668,
+      "authenticated_user_id": "mei_davis_8935"
+    },
+    {
+      "task_id": "19",
+      "purpose": "You want to return the water bottle, and exchange the pet bed and office chair to the cheapest version. Mention the two things together and you want to get both done. If and only if you can only do one of the two things, you prefer to do whatever saves you most money. Ask the agent how much money you can save in both options.",
+      "reward": 1.0,
+      "termination_reason": "TerminationReason.USER_STOP",
+      "duration_s": 65.46,
+      "answer": "Done! Your return is all set. \u2705\n\n**Order #W2890441 \u2014 Return requested**\n- **Item:** Water Bottle (1000ml, stainless steel, blue)\n- **Refund:** **$54.04** to your Mastercard ending 1037\n- **Timeline:** 5\u20137 business days for the refund to appear\n\nYou'll receive an email shortly with instructions on how and where to send the water bottle back. The other items in the order (Pet Bed, Office Chair, Skateboard) are unaffected \u2014 though please note the order is now in \"return requested\" status, so no further exchanges or returns can be made on it.\n\nHang in there, Mei. Anything else I can help with?",
+      "reward_info": {
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+        "db_check": {
+          "db_match": true,
+          "db_reward": 1.0
+        },
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+        "action_checks": [
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+              "requestor": "assistant",
+              "name": "find_user_id_by_name_zip",
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+                "first_name": "Mei",
+                "last_name": "Davis",
+                "zip": "80217"
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+              "requestor": "assistant",
+              "name": "get_order_details",
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+                "order_id": "#W2890441"
+              },
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+              "compare_args": null
+            },
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+          {
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+          {
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+            },
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+            "tool_type": "read"
+          },
+          {
+            "action": {
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+              "requestor": "assistant",
+              "name": "return_delivered_order_items",
+              "arguments": {
+                "order_id": "#W2890441",
+                "item_ids": [
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+                ],
+                "payment_method_id": "credit_card_1061405"
+              },
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+            },
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+            "tool_type": "write"
+          }
+        ],
+        "nl_assertions": [
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+            "nl_assertion": "Agent should tell the user that returning the water bottle gives a refund of $54.04.",
+            "met": true,
+            "justification": "The agent explicitly stated that returning the Water Bottle would provide a refund of $54.04 and later confirmed the return would issue a $54.04 refund."
+          },
+          {
+            "nl_assertion": "Agent should tell the user that exchanging the pet bed and office chair saves $41.64 total.",
+            "met": true,
+            "justification": "The agent calculated the savings for exchanging the Pet Bed ($14.18) and Office Chair ($27.46) and explicitly stated the total savings were $41.64."
+          }
+        ],
+        "communicate_checks": null,
+        "reward_basis": [
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+        ],
+        "reward_breakdown": {
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+        },
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+      },
+      "tool_steps": 7,
+      "wall_s": 71.953,
+      "authenticated_user_id": "mei_davis_8935"
+    },
+    {
+      "task_id": "21",
+      "purpose": "You want to exchange your shoes to item ID 4107812777, and use your gift card to cover possible charges. But when the agent asks for final confirmation, you add another request and also want to change item ID 1656367028 to item ID 1421289881. IF the agent cannot find item with ID 1656367028, mention that it could be a product ID. You are not familiar with the domain and might confuse product and item ids, so ask the agent to figure out the details on its own if needed. You want to know your gift card balance after all these changes are complete.",
+      "reward": 1.0,
+      "termination_reason": "TerminationReason.USER_STOP",
+      "duration_s": 126.056,
+      "answer": "All set! Both changes have been applied to order **#W9911714**.\n\n**What changed**\n- Running Shoes: 9791469541 (size 9, yellow) \u2192 **4107812777** (size 9, black)\n- Mechanical Keyboard: 1340995114 (tactile, full size) \u2192 **1421289881** (linear, 80%)\n\n**Charges**\n- Total difference paid to gift card 4332117: **$41.92** ($8.28 + $33.64)\n- Starting balance: $86.00 \u2192 **Current gift card balance: $44.08**\n\nThe order status is now **\"pending (item modified)\"** \u2014 it will still ship, but please note it can't be modified or cancelled any further.\n\nOne heads-up: the system record displays the shoes line with the keyboard's option details, which appears to be a display glitch \u2014 your payment total is correct. If you'd like that cleaned up on the order record, I can connect you with a human agent.",
+      "reward_info": {
+        "reward": 1.0,
+        "db_check": {
+          "db_match": true,
+          "db_reward": 1.0
+        },
+        "env_assertions": [],
+        "action_checks": [
+          {
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+              "requestor": "assistant",
+              "name": "find_user_id_by_name_zip",
+              "arguments": {
+                "first_name": "Ethan",
+                "last_name": "Garcia",
+                "zip": "80280"
+              },
+              "info": null,
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+            },
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+              "name": "get_product_details",
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+            "tool_type": "read"
+          },
+          {
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+              "action_id": "21_10",
+              "requestor": "assistant",
+              "name": "calculate",
+              "arguments": {
+                "expression": "155.33 - 147.05 + 268.77 - 235.13"
+              },
+              "info": null,
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+            },
+            "action_match": false,
+            "action_reward": 0.0,
+            "tool_type": "generic"
+          },
+          {
+            "action": {
+              "action_id": "21_11",
+              "requestor": "assistant",
+              "name": "modify_pending_order_items",
+              "arguments": {
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+                "item_ids": [
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+                  "1340995114"
+                ],
+                "new_item_ids": [
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+                  "1421289881"
+                ],
+                "payment_method_id": "gift_card_4332117"
+              },
+              "info": null,
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+            },
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+            "tool_type": "write"
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+        "reward_breakdown": {
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+          "communicate": null,
+          "action": null
+        }
+      },
+      "tool_steps": 12,
+      "wall_s": 130.53,
+      "authenticated_user_id": "ethan_garcia_1261"
+    }
+  ]
+}
\ No newline at end of file
diff --git a/evals/tau2_retail/artifacts/retail_50_first10/traces.json b/evals/tau2_retail/artifacts/retail_50_first10/traces.json
new file mode 100644
index 0000000..7e730d7
--- /dev/null
+++ b/evals/tau2_retail/artifacts/retail_50_first10/traces.json
@@ -0,0 +1,3126 @@
+{
+  "resourceSpans": [
+    {
+      "scopeSpans": [
+        {
+          "spans": [
+            {
+              "traceId": "7592bae12a21e1fe14af253509799dc8",
+              "spanId": "016e84b154fa9786",
+              "name": "execute_tool",
+              "startTimeUnixNano": "1793306766398730200",
+              "endTimeUnixNano": "1793306766398730200",
+              "attributes": [
+                {
+                  "key": "gen_ai.operation.name",
+                  "value": {
+                    "stringValue": "execute_tool"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.name",
+                  "value": {
+                    "stringValue": "find_user_id_by_name_zip"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.call.arguments",
+                  "value": {
+                    "stringValue": "{\"first_name\": \"Mei\", \"last_name\": \"Kovacs\", \"zip\": \"28236\"}"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.call.result",
+                  "value": {
+                    "stringValue": "mei_kovacs_8020"
+                  }
+                }
+              ],
+              "status": {
+                "code": 0,
+                "message": ""
+              },
+              "parentSpanId": "bbc27ebf7a370ce5"
+            },
+            {
+              "traceId": "7592bae12a21e1fe14af253509799dc8",
+              "spanId": "24c5af92e1d52c90",
+              "name": "execute_tool",
+              "startTimeUnixNano": "1793306768888134200",
+              "endTimeUnixNano": "1793306768888134200",
+              "attributes": [
+                {
+                  "key": "gen_ai.operation.name",
+                  "value": {
+                    "stringValue": "execute_tool"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.name",
+                  "value": {
+                    "stringValue": "get_user_details"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.call.arguments",
+                  "value": {
+                    "stringValue": "{\"user_id\": \"mei_kovacs_8020\"}"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.call.result",
+                  "value": {
+                    "stringValue": "{\"user_id\": \"mei_kovacs_8020\", \"name\": {\"first_name\": \"Mei\", \"last_name\": \"Kovacs\"}, \"address\": {\"address1\": \"317 Elm Street\", \"address2\": \"Suite 461\", \"city\": \"Charlotte\", \"country\": \"USA\", \"state\": \"NC\", \"zip\": \"28236\"}, \"email\": \"mei.kovacs8232@example.com\", \"payment_methods\": {\"paypal_7644869\": {\"source\": \"paypal\", \"id\": \"paypal_7644869\"}}, \"orders\": [\"#W6390527\", \"#W7800651\", \"#W8065207\"]}"
+                  }
+                }
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+              "status": {
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+                "message": ""
+              },
+              "parentSpanId": "bbc27ebf7a370ce5"
+            },
+            {
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+              "spanId": "910100c79923e9a1",
+              "name": "execute_tool",
+              "startTimeUnixNano": "1793306771709910500",
+              "endTimeUnixNano": "1793306771709910500",
+              "attributes": [
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+                  "key": "gen_ai.operation.name",
+                  "value": {
+                    "stringValue": "execute_tool"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.name",
+                  "value": {
+                    "stringValue": "get_order_details"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.call.arguments",
+                  "value": {
+                    "stringValue": "{\"order_id\": \"#W6390527\"}"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.call.result",
+                  "value": {
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+              "status": {
+                "code": 0,
+                "message": ""
+              },
+              "parentSpanId": "bbc27ebf7a370ce5"
+            },
+            {
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+              "endTimeUnixNano": "1793306776365032700",
+              "attributes": [
+                {
+                  "key": "gen_ai.operation.name",
+                  "value": {
+                    "stringValue": "execute_tool"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.name",
+                  "value": {
+                    "stringValue": "get_product_details"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.call.arguments",
+                  "value": {
+                    "stringValue": "{\"product_id\": \"8310926033\"}"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.call.result",
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+              "status": {
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+            },
+            {
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+              "startTimeUnixNano": "1793306778565711800",
+              "endTimeUnixNano": "1793306778565711800",
+              "attributes": [
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+                  "key": "gen_ai.operation.name",
+                  "value": {
+                    "stringValue": "execute_tool"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.name",
+                  "value": {
+                    "stringValue": "get_product_details"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.call.arguments",
+                  "value": {
+                    "stringValue": "{\"product_id\": \"6817146515\"}"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.call.result",
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+              "endTimeUnixNano": "1793306840546257200",
+              "attributes": [
+                {
+                  "key": "gen_ai.operation.name",
+                  "value": {
+                    "stringValue": "execute_tool"
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+                },
+                {
+                  "key": "gen_ai.tool.name",
+                  "value": {
+                    "stringValue": "exchange_delivered_order_items"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.call.arguments",
+                  "value": {
+                    "stringValue": "{\"order_id\": \"#W6390527\", \"item_ids\": [\"8384507844\"], \"new_item_ids\": [\"7453605304\"], \"payment_method_id\": \"paypal_7644869\"}"
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+                {
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+              "spanId": "bbc27ebf7a370ce5",
+              "name": "invoke_agent",
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+              "endTimeUnixNano": "1793306847308167300",
+              "attributes": [
+                {
+                  "key": "gen_ai.operation.name",
+                  "value": {
+                    "stringValue": "invoke_agent"
+                  }
+                },
+                {
+                  "key": "gen_ai.agent.name",
+                  "value": {
+                    "stringValue": "tau2-retail"
+                  }
+                },
+                {
+                  "key": "gen_ai.agent.id",
+                  "value": {
+                    "stringValue": "tau2-retail-6"
+                  }
+                },
+                {
+                  "key": "faultgate.scenario",
+                  "value": {
+                    "stringValue": "retail-6"
+                  }
+                },
+                {
+                  "key": "metadata.scenario",
+                  "value": {
+                    "stringValue": "retail-6"
+                  }
+                },
+                {
+                  "key": "gen_ai.prompt",
+                  "value": {
+                    "stringValue": "You want to exchange the water bottle and the desk lamp. You want to exchange the water bottle to a bigger one, and the desk lamp to a less bright one (prefer battery > USB > AC). If the agent asks for confirmation, only exchange the desk lamp."
+                  }
+                },
+                {
+                  "key": "gen_ai.completion",
+                  "value": {
+                    "stringValue": "Your exchange has been processed successfully. Here's the confirmation:\n\n**Order #W6390527** \u2014 status: **exchange requested**\n\n| | Details |\n|---|---|\n| Exchanging | Desk Lamp: white / medium brightness / USB |\n| New item | Desk Lamp: silver / low brightness / battery (item #7453605304) |\n| Price difference | $12.07 charged to your PayPal account |\n| Unchanged | Water Bottle (500ml / glass / black) and Hiking Boots |\n\nYou'll receive an email shortly with instructions on how and where to return the original desk lamp. Is there anything else I can help you with?"
+                  }
+                },
+                {
+                  "key": "faultgate.termination",
+                  "value": {
+                    "stringValue": "TerminationReason.USER_STOP"
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+                {
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+                  "value": {
+                    "stringValue": "mei_kovacs_8020"
+                  }
+                }
+              ],
+              "status": {
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+                "message": ""
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+              "attributes": [
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+                  "value": {
+                    "stringValue": "execute_tool"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.name",
+                  "value": {
+                    "stringValue": "find_user_id_by_name_zip"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.call.arguments",
+                  "value": {
+                    "stringValue": "{\"first_name\": \"Mei\", \"last_name\": \"Kovacs\", \"zip\": \"28236\"}"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.call.result",
+                  "value": {
+                    "stringValue": "mei_kovacs_8020"
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+              "name": "execute_tool",
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+              "endTimeUnixNano": "1793306868699542500",
+              "attributes": [
+                {
+                  "key": "gen_ai.operation.name",
+                  "value": {
+                    "stringValue": "execute_tool"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.name",
+                  "value": {
+                    "stringValue": "get_user_details"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.call.arguments",
+                  "value": {
+                    "stringValue": "{\"user_id\": \"mei_kovacs_8020\"}"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.call.result",
+                  "value": {
+                    "stringValue": "{\"user_id\": \"mei_kovacs_8020\", \"name\": {\"first_name\": \"Mei\", \"last_name\": \"Kovacs\"}, \"address\": {\"address1\": \"317 Elm Street\", \"address2\": \"Suite 461\", \"city\": \"Charlotte\", \"country\": \"USA\", \"state\": \"NC\", \"zip\": \"28236\"}, \"email\": \"mei.kovacs8232@example.com\", \"payment_methods\": {\"paypal_7644869\": {\"source\": \"paypal\", \"id\": \"paypal_7644869\"}}, \"orders\": [\"#W6390527\", \"#W7800651\", \"#W8065207\"]}"
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+              "endTimeUnixNano": "1793306872886606700",
+              "attributes": [
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+                  "key": "gen_ai.operation.name",
+                  "value": {
+                    "stringValue": "execute_tool"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.name",
+                  "value": {
+                    "stringValue": "get_order_details"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.call.arguments",
+                  "value": {
+                    "stringValue": "{\"order_id\": \"#W6390527\"}"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.call.result",
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+                  }
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+              "status": {
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+              "startTimeUnixNano": "1793306892314965100",
+              "endTimeUnixNano": "1793306892314965100",
+              "attributes": [
+                {
+                  "key": "gen_ai.operation.name",
+                  "value": {
+                    "stringValue": "execute_tool"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.name",
+                  "value": {
+                    "stringValue": "get_product_details"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.call.arguments",
+                  "value": {
+                    "stringValue": "{\"product_id\": \"6817146515\"}"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.call.result",
+                  "value": {
+                    "stringValue": "{\"name\": \"Desk Lamp\", \"product_id\": \"6817146515\", \"variants\": {\"9083642334\": {\"item_id\": \"9083642334\", \"options\": {\"color\": \"white\", \"brightness\": \"high\", \"power source\": \"USB\"}, \"available\": true, \"price\": 164.28}, \"4385534692\": {\"item_id\": \"4385534692\", \"options\": {\"color\": \"white\", \"brightness\": \"high\", \"power source\": \"AC adapter\"}, \"available\": false, \"price\": 138.07}, \"7624783998\": {\"item_id\": \"7624783998\", \"options\": {\"color\": \"black\", \"brightness\": \"high\", \"power source\": \"AC adapter\"}, \"available\": true, \"price\": 154.17}, \"1270145486\": {\"item_id\": \"1270145486\", \"options\": {\"color\": \"white\", \"brightness\": \"high\", \"power source\": \"battery\"}, \"available\": false, \"price\": 144.07}, \"5320792178\": {\"item_id\": \"5320792178\", \"options\": {\"color\": \"black\", \"brightness\": \"medium\", \"power source\": \"AC adapter\"}, \"available\": true, \"price\": 135.24}, \"5370728469\": {\"item_id\": \"5370728469\", \"options\": {\"color\": \"silver\", \"brightness\": \"medium\", \"power source\": \"USB\"}, \"available\": true, \"price\": 164.97}, \"6805564527\": {\"item_id\": \"6805564527\", \"options\": {\"color\": \"black\", \"brightness\": \"medium\", \"power source\": \"USB\"}, \"available\": true, \"price\": 158.41}, \"1569765161\": {\"item_id\": \"1569765161\", \"options\": {\"color\": \"silver\", \"brightness\": \"low\", \"power source\": \"AC adapter\"}, \"available\": true, \"price\": 143.02}, \"7453605304\": {\"item_id\": \"7453605304\", \"options\": {\"color\": \"silver\", \"brightness\": \"low\", \"power source\": \"battery\"}, \"available\": true, \"price\": 150.01}, \"9190635437\": {\"item_id\": \"9190635437\", \"options\": {\"color\": \"black\", \"brightness\": \"low\", \"power source\": \"USB\"}, \"available\": true, \"price\": 153.23}, \"4447749792\": {\"item_id\": \"4447749792\", \"options\": {\"color\": \"white\", \"brightness\": \"medium\", \"power source\": \"AC adapter\"}, \"available\": false, \"price\": 139.8}, \"8384507844\": {\"item_id\": \"8384507844\", \"options\": {\"color\": \"white\", \"brightness\": \"medium\", \"power source\": \"USB\"}, \"available\": false, \"price\": 137.94}}}"
+                  }
+                }
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+                "message": ""
+              },
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+              "spanId": "92cbab76ef7843aa",
+              "name": "execute_tool",
+              "startTimeUnixNano": "1793306910080501600",
+              "endTimeUnixNano": "1793306910080501600",
+              "attributes": [
+                {
+                  "key": "gen_ai.operation.name",
+                  "value": {
+                    "stringValue": "execute_tool"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.name",
+                  "value": {
+                    "stringValue": "exchange_delivered_order_items"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.call.arguments",
+                  "value": {
+                    "stringValue": "{\"order_id\": \"#W6390527\", \"item_ids\": [\"8384507844\"], \"new_item_ids\": [\"9083642334\"], \"payment_method_id\": \"paypal_7644869\"}"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.call.result",
+                  "value": {
+                    "stringValue": "{\"order_id\": \"#W6390527\", \"user_id\": \"mei_kovacs_8020\", \"address\": {\"address1\": \"317 Elm Street\", \"address2\": \"Suite 461\", \"city\": \"Charlotte\", \"country\": \"USA\", \"state\": \"NC\", \"zip\": \"28236\"}, \"items\": [{\"name\": \"Desk Lamp\", \"product_id\": \"6817146515\", \"item_id\": \"8384507844\", \"price\": 137.94, \"options\": {\"color\": \"white\", \"brightness\": \"medium\", \"power source\": \"USB\"}}, {\"name\": \"Hiking Boots\", \"product_id\": \"7363354090\", \"item_id\": \"1615379700\", \"price\": 253.89, \"options\": {\"size\": \"10\", \"material\": \"synthetic\", \"waterproof\": \"yes\"}}, {\"name\": \"Water Bottle\", \"product_id\": \"8310926033\", \"item_id\": \"8538875209\", \"price\": 45.13, \"options\": {\"capacity\": \"500ml\", \"material\": \"glass\", \"color\": \"black\"}}], \"status\": \"exchange requested\", \"fulfillments\": [{\"tracking_id\": [\"745984883162\"], \"item_ids\": [\"8384507844\", \"1615379700\", \"8538875209\"]}], \"payment_history\": [{\"transaction_type\": \"payment\", \"amount\": 436.96, \"payment_method_id\": \"paypal_7644869\"}], \"cancel_reason\": null, \"exchange_items\": [\"8384507844\"], \"exchange_new_items\": [\"9083642334\"], \"exchange_payment_method_id\": \"paypal_7644869\", \"exchange_price_difference\": 26.34, \"return_items\": null, \"return_payment_method_id\": null}"
+                  }
+                }
+              ],
+              "status": {
+                "code": 0,
+                "message": ""
+              },
+              "parentSpanId": "fdf1329b6fd52002"
+            },
+            {
+              "traceId": "75d4fb0fe0a81159ccd8fd2403f9ad64",
+              "spanId": "fdf1329b6fd52002",
+              "name": "invoke_agent",
+              "startTimeUnixNano": "1793306847348128500",
+              "endTimeUnixNano": "1793306916530739000",
+              "attributes": [
+                {
+                  "key": "gen_ai.operation.name",
+                  "value": {
+                    "stringValue": "invoke_agent"
+                  }
+                },
+                {
+                  "key": "gen_ai.agent.name",
+                  "value": {
+                    "stringValue": "tau2-retail"
+                  }
+                },
+                {
+                  "key": "gen_ai.agent.id",
+                  "value": {
+                    "stringValue": "tau2-retail-8"
+                  }
+                },
+                {
+                  "key": "faultgate.scenario",
+                  "value": {
+                    "stringValue": "retail-8"
+                  }
+                },
+                {
+                  "key": "metadata.scenario",
+                  "value": {
+                    "stringValue": "retail-8"
+                  }
+                },
+                {
+                  "key": "gen_ai.prompt",
+                  "value": {
+                    "stringValue": "You want to exchange the water bottle and the desk lamp. You want to exchange the water bottle to a bigger one, and the desk lamp to a brighter one (prefer battery > USB > AC). If the agent asks for confirmation, only exchange the desk lamp."
+                  }
+                },
+                {
+                  "key": "gen_ai.completion",
+                  "value": {
+                    "stringValue": "Your exchange has been processed successfully. \u2705\n\n**Order #W6390527 \u2014 status: exchange requested**\n\n| | Details |\n|---|---|\n| Exchanged | Desk Lamp (8384507844) white / medium / USB \u2192 **Desk Lamp (9083642334) white / high / USB** |\n| Price difference | **$26.34** charged to your PayPal account (paypal_7644869) |\n| Unchanged | Water Bottle (500ml / glass / black), Hiking Boots (size 10 / synthetic / waterproof) |\n\nYou'll receive an email shortly with instructions on how and where to return the original desk lamp.\n\nIs there anything else I can help you with?"
+                  }
+                },
+                {
+                  "key": "faultgate.termination",
+                  "value": {
+                    "stringValue": "TerminationReason.USER_STOP"
+                  }
+                },
+                {
+                  "key": "enduser.id",
+                  "value": {
+                    "stringValue": "mei_kovacs_8020"
+                  }
+                }
+              ],
+              "status": {
+                "code": 0,
+                "message": ""
+              }
+            },
+            {
+              "traceId": "8a8111108d8584d8da4bd8b339b5b472",
+              "spanId": "0908554ea70b4700",
+              "name": "execute_tool",
+              "startTimeUnixNano": "1793306926066826200",
+              "endTimeUnixNano": "1793306926066826200",
+              "attributes": [
+                {
+                  "key": "gen_ai.operation.name",
+                  "value": {
+                    "stringValue": "execute_tool"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.name",
+                  "value": {
+                    "stringValue": "find_user_id_by_email"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.call.arguments",
+                  "value": {
+                    "stringValue": "{\"email\": \"mia.garcia2723@example.com\"}"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.call.result",
+                  "value": {
+                    "stringValue": "mia_garcia_4516"
+                  }
+                }
+              ],
+              "status": {
+                "code": 0,
+                "message": ""
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+              "parentSpanId": "fe75b06172fcf883"
+            },
+            {
+              "traceId": "8a8111108d8584d8da4bd8b339b5b472",
+              "spanId": "7df4176da41d2d47",
+              "name": "execute_tool",
+              "startTimeUnixNano": "1793306927848015000",
+              "endTimeUnixNano": "1793306927848015000",
+              "attributes": [
+                {
+                  "key": "gen_ai.operation.name",
+                  "value": {
+                    "stringValue": "execute_tool"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.name",
+                  "value": {
+                    "stringValue": "get_user_details"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.call.arguments",
+                  "value": {
+                    "stringValue": "{\"user_id\": \"mia_garcia_4516\"}"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.call.result",
+                  "value": {
+                    "stringValue": "{\"user_id\": \"mia_garcia_4516\", \"name\": {\"first_name\": \"Mia\", \"last_name\": \"Garcia\"}, \"address\": {\"address1\": \"537 Main Street\", \"address2\": \"Suite 572\", \"city\": \"Indianapolis\", \"country\": \"USA\", \"state\": \"IN\", \"zip\": \"46229\"}, \"email\": \"mia.garcia2723@example.com\", \"payment_methods\": {\"paypal_9497703\": {\"source\": \"paypal\", \"id\": \"paypal_9497703\"}, \"credit_card_3124723\": {\"source\": \"credit_card\", \"id\": \"credit_card_3124723\", \"brand\": \"visa\", \"last_four\": \"7285\"}}, \"orders\": [\"#W5490111\", \"#W7387996\"]}"
+                  }
+                }
+              ],
+              "status": {
+                "code": 0,
+                "message": ""
+              },
+              "parentSpanId": "fe75b06172fcf883"
+            },
+            {
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+              "spanId": "10251f966848dd16",
+              "name": "execute_tool",
+              "startTimeUnixNano": "1793306938231853700",
+              "endTimeUnixNano": "1793306938232826700",
+              "attributes": [
+                {
+                  "key": "gen_ai.operation.name",
+                  "value": {
+                    "stringValue": "execute_tool"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.name",
+                  "value": {
+                    "stringValue": "get_order_details"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.call.arguments",
+                  "value": {
+                    "stringValue": "{\"order_id\": \"#W5490111\"}"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.call.result",
+                  "value": {
+                    "stringValue": "{\"order_id\": \"#W5490111\", \"user_id\": \"mia_garcia_4516\", \"address\": {\"address1\": \"537 Main Street\", \"address2\": \"Suite 572\", \"city\": \"Indianapolis\", \"country\": \"USA\", \"state\": \"IN\", \"zip\": \"46229\"}, \"items\": [{\"name\": \"Water Bottle\", \"product_id\": \"8310926033\", \"item_id\": \"4579334072\", \"price\": 54.85, \"options\": {\"capacity\": \"750ml\", \"material\": \"glass\", \"color\": \"black\"}}, {\"name\": \"Mechanical Keyboard\", \"product_id\": \"1656367028\", \"item_id\": \"1421289881\", \"price\": 268.77, \"options\": {\"switch type\": \"linear\", \"backlight\": \"none\", \"size\": \"80%\"}}, {\"name\": \"Action Camera\", \"product_id\": \"3377618313\", \"item_id\": \"6117189161\", \"price\": 481.5, \"options\": {\"resolution\": \"4K\", \"waterproof\": \"yes\", \"color\": \"silver\"}}, {\"name\": \"Backpack\", \"product_id\": \"2524789262\", \"item_id\": \"4947717507\", \"price\": 218.04, \"options\": {\"color\": \"green\", \"size\": \"medium\", \"material\": \"leather\", \"compartment\": \"camera\"}}], \"status\": \"delivered\", \"fulfillments\": [{\"tracking_id\": [\"574297338433\"], \"item_ids\": [\"4579334072\", \"1421289881\", \"6117189161\", \"4947717507\"]}], \"payment_history\": [{\"transaction_type\": \"payment\", \"amount\": 1023.16, \"payment_method_id\": \"credit_card_3124723\"}], \"cancel_reason\": null, \"exchange_items\": null, \"exchange_new_items\": null, \"exchange_payment_method_id\": null, \"exchange_price_difference\": null, \"return_items\": null, \"return_payment_method_id\": null}"
+                  }
+                }
+              ],
+              "status": {
+                "code": 0,
+                "message": ""
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+              "parentSpanId": "fe75b06172fcf883"
+            },
+            {
+              "traceId": "8a8111108d8584d8da4bd8b339b5b472",
+              "spanId": "6bd1679eef1592ef",
+              "name": "execute_tool",
+              "startTimeUnixNano": "1793306940834380500",
+              "endTimeUnixNano": "1793306940834380500",
+              "attributes": [
+                {
+                  "key": "gen_ai.operation.name",
+                  "value": {
+                    "stringValue": "execute_tool"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.name",
+                  "value": {
+                    "stringValue": "get_order_details"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.call.arguments",
+                  "value": {
+                    "stringValue": "{\"order_id\": \"#W7387996\"}"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.call.result",
+                  "value": {
+                    "stringValue": "{\"order_id\": \"#W7387996\", \"user_id\": \"mia_garcia_4516\", \"address\": {\"address1\": \"537 Main Street\", \"address2\": \"Suite 572\", \"city\": \"Indianapolis\", \"country\": \"USA\", \"state\": \"IN\", \"zip\": \"46229\"}, \"items\": [{\"name\": \"Gaming Mouse\", \"product_id\": \"5713490933\", \"item_id\": \"5796612084\", \"price\": 158.89, \"options\": {\"color\": \"RGB\", \"sensor type\": \"optical\", \"connectivity\": \"wired\"}}], \"status\": \"delivered\", \"fulfillments\": [{\"tracking_id\": [\"200246490130\"], \"item_ids\": [\"5796612084\"]}], \"payment_history\": [{\"transaction_type\": \"payment\", \"amount\": 158.89, \"payment_method_id\": \"paypal_9497703\"}], \"cancel_reason\": null, \"exchange_items\": null, \"exchange_new_items\": null, \"exchange_payment_method_id\": null, \"exchange_price_difference\": null, \"return_items\": null, \"return_payment_method_id\": null}"
+                  }
+                }
+              ],
+              "status": {
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+                "message": ""
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+            },
+            {
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+              "spanId": "ebe53f8fc26160d7",
+              "name": "execute_tool",
+              "startTimeUnixNano": "1793306984660566500",
+              "endTimeUnixNano": "1793306984661549500",
+              "attributes": [
+                {
+                  "key": "gen_ai.operation.name",
+                  "value": {
+                    "stringValue": "execute_tool"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.name",
+                  "value": {
+                    "stringValue": "return_delivered_order_items"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.call.arguments",
+                  "value": {
+                    "stringValue": "{\"order_id\": \"#W5490111\", \"item_ids\": [\"4579334072\", \"1421289881\", \"6117189161\", \"4947717507\"], \"payment_method_id\": \"credit_card_3124723\"}"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.call.result",
+                  "value": {
+                    "stringValue": "{\"order_id\": \"#W5490111\", \"user_id\": \"mia_garcia_4516\", \"address\": {\"address1\": \"537 Main Street\", \"address2\": \"Suite 572\", \"city\": \"Indianapolis\", \"country\": \"USA\", \"state\": \"IN\", \"zip\": \"46229\"}, \"items\": [{\"name\": \"Water Bottle\", \"product_id\": \"8310926033\", \"item_id\": \"4579334072\", \"price\": 54.85, \"options\": {\"capacity\": \"750ml\", \"material\": \"glass\", \"color\": \"black\"}}, {\"name\": \"Mechanical Keyboard\", \"product_id\": \"1656367028\", \"item_id\": \"1421289881\", \"price\": 268.77, \"options\": {\"switch type\": \"linear\", \"backlight\": \"none\", \"size\": \"80%\"}}, {\"name\": \"Action Camera\", \"product_id\": \"3377618313\", \"item_id\": \"6117189161\", \"price\": 481.5, \"options\": {\"resolution\": \"4K\", \"waterproof\": \"yes\", \"color\": \"silver\"}}, {\"name\": \"Backpack\", \"product_id\": \"2524789262\", \"item_id\": \"4947717507\", \"price\": 218.04, \"options\": {\"color\": \"green\", \"size\": \"medium\", \"material\": \"leather\", \"compartment\": \"camera\"}}], \"status\": \"return requested\", \"fulfillments\": [{\"tracking_id\": [\"574297338433\"], \"item_ids\": [\"4579334072\", \"1421289881\", \"6117189161\", \"4947717507\"]}], \"payment_history\": [{\"transaction_type\": \"payment\", \"amount\": 1023.16, \"payment_method_id\": \"credit_card_3124723\"}], \"cancel_reason\": null, \"exchange_items\": null, \"exchange_new_items\": null, \"exchange_payment_method_id\": null, \"exchange_price_difference\": null, \"return_items\": [\"1421289881\", \"4579334072\", \"4947717507\", \"6117189161\"], \"return_payment_method_id\": \"credit_card_3124723\"}"
+                  }
+                }
+              ],
+              "status": {
+                "code": 0,
+                "message": ""
+              },
+              "parentSpanId": "fe75b06172fcf883"
+            },
+            {
+              "traceId": "8a8111108d8584d8da4bd8b339b5b472",
+              "spanId": "6d6d3b9ba4908531",
+              "name": "execute_tool",
+              "startTimeUnixNano": "1793306989367403200",
+              "endTimeUnixNano": "1793306989367403200",
+              "attributes": [
+                {
+                  "key": "gen_ai.operation.name",
+                  "value": {
+                    "stringValue": "execute_tool"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.name",
+                  "value": {
+                    "stringValue": "return_delivered_order_items"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.call.arguments",
+                  "value": {
+                    "stringValue": "{\"item_ids\": [\"5796612084\"], \"order_id\": \"#W7387996\", \"payment_method_id\": \"paypal_9497703\"}"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.call.result",
+                  "value": {
+                    "stringValue": "{\"order_id\": \"#W7387996\", \"user_id\": \"mia_garcia_4516\", \"address\": {\"address1\": \"537 Main Street\", \"address2\": \"Suite 572\", \"city\": \"Indianapolis\", \"country\": \"USA\", \"state\": \"IN\", \"zip\": \"46229\"}, \"items\": [{\"name\": \"Gaming Mouse\", \"product_id\": \"5713490933\", \"item_id\": \"5796612084\", \"price\": 158.89, \"options\": {\"color\": \"RGB\", \"sensor type\": \"optical\", \"connectivity\": \"wired\"}}], \"status\": \"return requested\", \"fulfillments\": [{\"tracking_id\": [\"200246490130\"], \"item_ids\": [\"5796612084\"]}], \"payment_history\": [{\"transaction_type\": \"payment\", \"amount\": 158.89, \"payment_method_id\": \"paypal_9497703\"}], \"cancel_reason\": null, \"exchange_items\": null, \"exchange_new_items\": null, \"exchange_payment_method_id\": null, \"exchange_price_difference\": null, \"return_items\": [\"5796612084\"], \"return_payment_method_id\": \"paypal_9497703\"}"
+                  }
+                }
+              ],
+              "status": {
+                "code": 0,
+                "message": ""
+              },
+              "parentSpanId": "fe75b06172fcf883"
+            },
+            {
+              "traceId": "8a8111108d8584d8da4bd8b339b5b472",
+              "spanId": "fe75b06172fcf883",
+              "name": "invoke_agent",
+              "startTimeUnixNano": "1793306916579219200",
+              "endTimeUnixNano": "1793306997694537400",
+              "attributes": [
+                {
+                  "key": "gen_ai.operation.name",
+                  "value": {
+                    "stringValue": "invoke_agent"
+                  }
+                },
+                {
+                  "key": "gen_ai.agent.name",
+                  "value": {
+                    "stringValue": "tau2-retail"
+                  }
+                },
+                {
+                  "key": "gen_ai.agent.id",
+                  "value": {
+                    "stringValue": "tau2-retail-11"
+                  }
+                },
+                {
+                  "key": "faultgate.scenario",
+                  "value": {
+                    "stringValue": "retail-11"
+                  }
+                },
+                {
+                  "key": "metadata.scenario",
+                  "value": {
+                    "stringValue": "retail-11"
+                  }
+                },
+                {
+                  "key": "gen_ai.prompt",
+                  "value": {
+                    "stringValue": "For some reason, you want to return all things ordered. You have two payment methods and two orders, and you want to refund each order to the other order's payment method. If not possible, you are angry and swear for a few times, then agree to return all things with the original payment method."
+                  }
+                },
+                {
+                  "key": "gen_ai.completion",
+                  "value": {
+                    "stringValue": "Both returns are submitted.\n\n**Order #W5490111** \u2014 status: return requested\nAll 4 items (Water Bottle, Mechanical Keyboard, Action Camera, Backpack) \u2192 **$1,023.16** back to your Visa ending 7285\n\n**Order #W7387996** \u2014 status: return requested\nGaming Mouse \u2192 **$158.89** back to your PayPal account\n\nYou'll get an email at mia.garcia2723@example.com with instructions on how and where to ship the items back. Card refunds typically take 5\u20137 business days to appear.\n\nAnd apologies for the runaround on the refund routing \u2014 the restriction is on my end, not something I could override. Anything else I can do for you?"
+                  }
+                },
+                {
+                  "key": "faultgate.termination",
+                  "value": {
+                    "stringValue": "TerminationReason.USER_STOP"
+                  }
+                },
+                {
+                  "key": "enduser.id",
+                  "value": {
+                    "stringValue": "mia_garcia_4516"
+                  }
+                }
+              ],
+              "status": {
+                "code": 0,
+                "message": ""
+              }
+            },
+            {
+              "traceId": "43211beff7212c051f344965f7f7d5ab",
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+                    "stringValue": "{\"item_ids\": [\"5796612084\"], \"order_id\": \"#W7387996\", \"payment_method_id\": \"paypal_9497703\"}"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.call.result",
+                  "value": {
+                    "stringValue": "{\"order_id\": \"#W7387996\", \"user_id\": \"mia_garcia_4516\", \"address\": {\"address1\": \"537 Main Street\", \"address2\": \"Suite 572\", \"city\": \"Indianapolis\", \"country\": \"USA\", \"state\": \"IN\", \"zip\": \"46229\"}, \"items\": [{\"name\": \"Gaming Mouse\", \"product_id\": \"5713490933\", \"item_id\": \"5796612084\", \"price\": 158.89, \"options\": {\"color\": \"RGB\", \"sensor type\": \"optical\", \"connectivity\": \"wired\"}}], \"status\": \"return requested\", \"fulfillments\": [{\"tracking_id\": [\"200246490130\"], \"item_ids\": [\"5796612084\"]}], \"payment_history\": [{\"transaction_type\": \"payment\", \"amount\": 158.89, \"payment_method_id\": \"paypal_9497703\"}], \"cancel_reason\": null, \"exchange_items\": null, \"exchange_new_items\": null, \"exchange_payment_method_id\": null, \"exchange_price_difference\": null, \"return_items\": [\"5796612084\"], \"return_payment_method_id\": \"paypal_9497703\"}"
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+              "parentSpanId": "0c322872e254f797"
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+            {
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+              "spanId": "0c322872e254f797",
+              "name": "invoke_agent",
+              "startTimeUnixNano": "1793307077649386300",
+              "endTimeUnixNano": "1793307142262757600",
+              "attributes": [
+                {
+                  "key": "gen_ai.operation.name",
+                  "value": {
+                    "stringValue": "invoke_agent"
+                  }
+                },
+                {
+                  "key": "gen_ai.agent.name",
+                  "value": {
+                    "stringValue": "tau2-retail"
+                  }
+                },
+                {
+                  "key": "gen_ai.agent.id",
+                  "value": {
+                    "stringValue": "tau2-retail-14"
+                  }
+                },
+                {
+                  "key": "faultgate.scenario",
+                  "value": {
+                    "stringValue": "retail-14"
+                  }
+                },
+                {
+                  "key": "metadata.scenario",
+                  "value": {
+                    "stringValue": "retail-14"
+                  }
+                },
+                {
+                  "key": "gen_ai.prompt",
+                  "value": {
+                    "stringValue": "You just quit gaming and want to cancel or return everything associated with it. (It's just a keyboard and a mouse, but do not reveal it to the agent). Original payment is preferred."
+                  }
+                },
+                {
+                  "key": "gen_ai.completion",
+                  "value": {
+                    "stringValue": "Both returns are submitted \u2705\n\n| Order | Item | Refund | Destination |\n|---|---|---|---|\n| #W5490111 | Mechanical Keyboard | $268.77 | Visa ending 7285 |\n| #W7387996 | Gaming Mouse | $158.89 | PayPal |\n\nTotal refund: **$427.66**\n\nBoth orders are now marked **\"return requested\"**, and you'll receive an email with instructions on how and where to send the items back. Refunds typically process after the items are received.\n\nYour other items in #W5490111 (water bottle, action camera, backpack) remain untouched. Good luck with your studies!"
+                  }
+                },
+                {
+                  "key": "faultgate.termination",
+                  "value": {
+                    "stringValue": "TerminationReason.USER_STOP"
+                  }
+                },
+                {
+                  "key": "enduser.id",
+                  "value": {
+                    "stringValue": "mia_garcia_4516"
+                  }
+                }
+              ],
+              "status": {
+                "code": 0,
+                "message": ""
+              }
+            },
+            {
+              "traceId": "974062dc7ad2621aad5ccf62fb2fdbb5",
+              "spanId": "92cdce68d372d394",
+              "name": "execute_tool",
+              "startTimeUnixNano": "1793307149030839600",
+              "endTimeUnixNano": "1793307149030839600",
+              "attributes": [
+                {
+                  "key": "gen_ai.operation.name",
+                  "value": {
+                    "stringValue": "execute_tool"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.name",
+                  "value": {
+                    "stringValue": "find_user_id_by_email"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.call.arguments",
+                  "value": {
+                    "stringValue": "{\"email\": \"sofia.doe_496@example.com\"}"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.call.result",
+                  "value": {
+                    "stringValue": "Error: User not found"
+                  }
+                },
+                {
+                  "key": "error.type",
+                  "value": {
+                    "stringValue": "ToolError"
+                  }
+                }
+              ],
+              "status": {
+                "code": 2,
+                "message": "ToolError"
+              },
+              "parentSpanId": "eef822dfd92a2213"
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+            {
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+              "name": "execute_tool",
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+              "endTimeUnixNano": "1793307156030064000",
+              "attributes": [
+                {
+                  "key": "gen_ai.operation.name",
+                  "value": {
+                    "stringValue": "execute_tool"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.name",
+                  "value": {
+                    "stringValue": "find_user_id_by_name_zip"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.call.arguments",
+                  "value": {
+                    "stringValue": "{\"first_name\": \"Fatima\", \"last_name\": \"Johnson\", \"zip\": \"78712\"}"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.call.result",
+                  "value": {
+                    "stringValue": "fatima_johnson_7581"
+                  }
+                }
+              ],
+              "status": {
+                "code": 0,
+                "message": ""
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+              "parentSpanId": "eef822dfd92a2213"
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+            {
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+              "name": "execute_tool",
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+              "endTimeUnixNano": "1793307157833358000",
+              "attributes": [
+                {
+                  "key": "gen_ai.operation.name",
+                  "value": {
+                    "stringValue": "execute_tool"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.name",
+                  "value": {
+                    "stringValue": "get_user_details"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.call.arguments",
+                  "value": {
+                    "stringValue": "{\"user_id\": \"fatima_johnson_7581\"}"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.call.result",
+                  "value": {
+                    "stringValue": "{\"user_id\": \"fatima_johnson_7581\", \"name\": {\"first_name\": \"Fatima\", \"last_name\": \"Johnson\"}, \"address\": {\"address1\": \"123 Elm Street\", \"address2\": \"Suite 640\", \"city\": \"Austin\", \"country\": \"USA\", \"state\": \"TX\", \"zip\": \"78712\"}, \"email\": \"fatima.johnson2300@example.com\", \"payment_methods\": {\"paypal_5364164\": {\"source\": \"paypal\", \"id\": \"paypal_5364164\"}, \"gift_card_1675628\": {\"source\": \"gift_card\", \"id\": \"gift_card_1675628\", \"balance\": 99.0}}, \"orders\": [\"#W5199551\", \"#W8665881\", \"#W9389413\"]}"
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+                }
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+              "status": {
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+                "message": ""
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+            {
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+              "name": "execute_tool",
+              "startTimeUnixNano": "1793307160597399500",
+              "endTimeUnixNano": "1793307160597399500",
+              "attributes": [
+                {
+                  "key": "gen_ai.operation.name",
+                  "value": {
+                    "stringValue": "execute_tool"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.name",
+                  "value": {
+                    "stringValue": "get_order_details"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.call.arguments",
+                  "value": {
+                    "stringValue": "{\"order_id\": \"#W5199551\"}"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.call.result",
+                  "value": {
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+              "endTimeUnixNano": "1793307163099886900",
+              "attributes": [
+                {
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+                  "value": {
+                    "stringValue": "execute_tool"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.name",
+                  "value": {
+                    "stringValue": "get_order_details"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.call.arguments",
+                  "value": {
+                    "stringValue": "{\"order_id\": \"#W8665881\"}"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.call.result",
+                  "value": {
+                    "stringValue": "{\"order_id\": \"#W8665881\", \"user_id\": \"fatima_johnson_7581\", \"address\": {\"address1\": \"123 Elm Street\", \"address2\": \"Suite 640\", \"city\": \"Austin\", \"country\": \"USA\", \"state\": \"TX\", \"zip\": \"78712\"}, \"items\": [{\"name\": \"Bluetooth Speaker\", \"product_id\": \"4768869376\", \"item_id\": \"5855700373\", \"price\": 293.46, \"options\": {\"color\": \"black\", \"battery life\": \"10 hours\", \"water resistance\": \"yes\"}}, {\"name\": \"Smart Watch\", \"product_id\": \"6945232052\", \"item_id\": \"9408160950\", \"price\": 381.26, \"options\": {\"color\": \"gold\", \"band material\": \"leather\", \"display\": \"LCD\"}}, {\"name\": \"Dumbbell Set\", \"product_id\": \"7233192239\", \"item_id\": \"4422467033\", \"price\": 483.47, \"options\": {\"weight range\": \"30-50 lbs\", \"material\": \"urethane\", \"set type\": \"adjustable\"}}, {\"name\": \"Espresso Machine\", \"product_id\": \"4354588079\", \"item_id\": \"1157853815\", \"price\": 3096.7, \"options\": {\"pressure\": \"19 bar\", \"capacity\": \"2L\", \"type\": \"capsule\"}}, {\"name\": \"Action Camera\", \"product_id\": \"3377618313\", \"item_id\": \"8725040869\", \"price\": 522.86, \"options\": {\"resolution\": \"4K\", \"waterproof\": \"no\", \"color\": \"black\"}}], \"status\": \"pending\", \"fulfillments\": [], \"payment_history\": [{\"transaction_type\": \"payment\", \"amount\": 4777.75, \"payment_method_id\": \"paypal_5364164\"}], \"cancel_reason\": null, \"exchange_items\": null, \"exchange_new_items\": null, \"exchange_payment_method_id\": null, \"exchange_price_difference\": null, \"return_items\": null, \"return_payment_method_id\": null}"
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+                  "key": "gen_ai.tool.name",
+                  "value": {
+                    "stringValue": "get_order_details"
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+                {
+                  "key": "gen_ai.tool.call.arguments",
+                  "value": {
+                    "stringValue": "{\"order_id\": \"#W9389413\"}"
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+                {
+                  "key": "gen_ai.tool.name",
+                  "value": {
+                    "stringValue": "cancel_pending_order"
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+                },
+                {
+                  "key": "gen_ai.tool.call.arguments",
+                  "value": {
+                    "stringValue": "{\"order_id\": \"#W5199551\", \"reason\": \"no longer needed\"}"
+                  }
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+                {
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+                {
+                  "key": "gen_ai.tool.name",
+                  "value": {
+                    "stringValue": "cancel_pending_order"
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+                  "value": {
+                    "stringValue": "{\"order_id\": \"#W8665881\", \"reason\": \"no longer needed\"}"
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+                {
+                  "key": "gen_ai.tool.name",
+                  "value": {
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+                {
+                  "key": "gen_ai.tool.call.arguments",
+                  "value": {
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+                  "key": "gen_ai.agent.name",
+                  "value": {
+                    "stringValue": "tau2-retail"
+                  }
+                },
+                {
+                  "key": "gen_ai.agent.id",
+                  "value": {
+                    "stringValue": "tau2-retail-16"
+                  }
+                },
+                {
+                  "key": "faultgate.scenario",
+                  "value": {
+                    "stringValue": "retail-16"
+                  }
+                },
+                {
+                  "key": "metadata.scenario",
+                  "value": {
+                    "stringValue": "retail-16"
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+                },
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+                  "key": "gen_ai.prompt",
+                  "value": {
+                    "stringValue": "You want to cancel all pending orders (since they are no longer needed) and return the watch you have received (but nothing else), and you want to know the total amount you can get back."
+                  }
+                },
+                {
+                  "key": "gen_ai.completion",
+                  "value": {
+                    "stringValue": "All done. \u2705\n\n**Completed actions:**\n- **#W5199551** \u2014 cancelled (no longer needed) \u2192 $3,131.10 refund to PayPal\n- **#W8665881** \u2014 cancelled (no longer needed) \u2192 $4,777.75 refund to PayPal\n- **#W9389413** \u2014 return requested for Smart Watch (item 2554056026) only \u2192 $367.38 refund to PayPal\n\n**Total refund across everything: $8,276.23**, all going back to your PayPal account (paypal_5364164).\n\nA couple of notes:\n- The cancellation refunds will appear in **5\u20137 business days** since PayPal isn't an instant-refund method.\n- You'll receive an email shortly with instructions on how and where to ship back the Smart Watch. The other three items from that order (Hiking Boots, Mechanical Keyboard, T-Shirt) stay with you \u2014 no action needed."
+                  }
+                },
+                {
+                  "key": "faultgate.termination",
+                  "value": {
+                    "stringValue": "TerminationReason.USER_STOP"
+                  }
+                },
+                {
+                  "key": "enduser.id",
+                  "value": {
+                    "stringValue": "fatima_johnson_7581"
+                  }
+                }
+              ],
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+                "message": ""
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+                },
+                {
+                  "key": "gen_ai.tool.name",
+                  "value": {
+                    "stringValue": "find_user_id_by_name_zip"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.call.arguments",
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+                    "stringValue": "{\"first_name\": \"Fatima\", \"last_name\": \"Johnson\", \"zip\": \"78712\"}"
+                  }
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+                  "value": {
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+                  }
+                },
+                {
+                  "key": "gen_ai.tool.call.arguments",
+                  "value": {
+                    "stringValue": "{\"order_id\": \"#W8665881\"}"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.call.result",
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+                    "stringValue": "execute_tool"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.name",
+                  "value": {
+                    "stringValue": "modify_pending_order_address"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.call.arguments",
+                  "value": {
+                    "stringValue": "{\"order_id\": \"#W8665881\", \"address1\": \"123 Elm Street\", \"address2\": \"Suite 641\", \"city\": \"Austin\", \"state\": \"TX\", \"country\": \"USA\", \"zip\": \"78712\"}"
+                  }
+                },
+                {
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+                  "value": {
+                    "stringValue": "{\"order_id\": \"#W8665881\", \"user_id\": \"fatima_johnson_7581\", \"address\": {\"address1\": \"123 Elm Street\", \"address2\": \"Suite 641\", \"city\": \"Austin\", \"country\": \"USA\", \"state\": \"TX\", \"zip\": \"78712\"}, \"items\": [{\"name\": \"Bluetooth Speaker\", \"product_id\": \"4768869376\", \"item_id\": \"5855700373\", \"price\": 293.46, \"options\": {\"color\": \"black\", \"battery life\": \"10 hours\", \"water resistance\": \"yes\"}}, {\"name\": \"Smart Watch\", \"product_id\": \"6945232052\", \"item_id\": \"9408160950\", \"price\": 381.26, \"options\": {\"color\": \"gold\", \"band material\": \"leather\", \"display\": \"LCD\"}}, {\"name\": \"Dumbbell Set\", \"product_id\": \"7233192239\", \"item_id\": \"4422467033\", \"price\": 483.47, \"options\": {\"weight range\": \"30-50 lbs\", \"material\": \"urethane\", \"set type\": \"adjustable\"}}, {\"name\": \"Espresso Machine\", \"product_id\": \"4354588079\", \"item_id\": \"1157853815\", \"price\": 3096.7, \"options\": {\"pressure\": \"19 bar\", \"capacity\": \"2L\", \"type\": \"capsule\"}}, {\"name\": \"Action Camera\", \"product_id\": \"3377618313\", \"item_id\": \"8725040869\", \"price\": 522.86, \"options\": {\"resolution\": \"4K\", \"waterproof\": \"no\", \"color\": \"black\"}}], \"status\": \"pending\", \"fulfillments\": [], \"payment_history\": [{\"transaction_type\": \"payment\", \"amount\": 4777.75, \"payment_method_id\": \"paypal_5364164\"}], \"cancel_reason\": null, \"exchange_items\": null, \"exchange_new_items\": null, \"exchange_payment_method_id\": null, \"exchange_price_difference\": null, \"return_items\": null, \"return_payment_method_id\": null}"
+                  }
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+              ],
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+                "message": ""
+              },
+              "parentSpanId": "a1bebd860e76c448"
+            },
+            {
+              "traceId": "f8cf6fd29a62065f7758d8579392c3ed",
+              "spanId": "a1bebd860e76c448",
+              "name": "invoke_agent",
+              "startTimeUnixNano": "1793307209474803700",
+              "endTimeUnixNano": "1793307242256780200",
+              "attributes": [
+                {
+                  "key": "gen_ai.operation.name",
+                  "value": {
+                    "stringValue": "invoke_agent"
+                  }
+                },
+                {
+                  "key": "gen_ai.agent.name",
+                  "value": {
+                    "stringValue": "tau2-retail"
+                  }
+                },
+                {
+                  "key": "gen_ai.agent.id",
+                  "value": {
+                    "stringValue": "tau2-retail-17"
+                  }
+                },
+                {
+                  "key": "faultgate.scenario",
+                  "value": {
+                    "stringValue": "retail-17"
+                  }
+                },
+                {
+                  "key": "metadata.scenario",
+                  "value": {
+                    "stringValue": "retail-17"
+                  }
+                },
+                {
+                  "key": "gen_ai.prompt",
+                  "value": {
+                    "stringValue": "You want to change #W8665881 to be delivered to Suite 641 instead."
+                  }
+                },
+                {
+                  "key": "gen_ai.completion",
+                  "value": {
+                    "stringValue": "Done! The delivery address for order #W8665881 has been updated to:\n\n- 123 Elm Street, **Suite 641**, Austin, TX, USA, 78712\n\nIs there anything else I can help you with?"
+                  }
+                },
+                {
+                  "key": "faultgate.termination",
+                  "value": {
+                    "stringValue": "TerminationReason.USER_STOP"
+                  }
+                },
+                {
+                  "key": "enduser.id",
+                  "value": {
+                    "stringValue": "fatima_johnson_7581"
+                  }
+                }
+              ],
+              "status": {
+                "code": 0,
+                "message": ""
+              }
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+              "attributes": [
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+                    "stringValue": "execute_tool"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.name",
+                  "value": {
+                    "stringValue": "find_user_id_by_name_zip"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.call.arguments",
+                  "value": {
+                    "stringValue": "{\"first_name\": \"Mei\", \"last_name\": \"Davis\", \"zip\": \"80217\"}"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.call.result",
+                  "value": {
+                    "stringValue": "mei_davis_8935"
+                  }
+                }
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+              "status": {
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+                "message": ""
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+              "parentSpanId": "32862204e9fc955a"
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+              "endTimeUnixNano": "1793307252416150100",
+              "attributes": [
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+                  "value": {
+                    "stringValue": "execute_tool"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.name",
+                  "value": {
+                    "stringValue": "get_user_details"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.call.arguments",
+                  "value": {
+                    "stringValue": "{\"user_id\": \"mei_davis_8935\"}"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.call.result",
+                  "value": {
+                    "stringValue": "{\"user_id\": \"mei_davis_8935\", \"name\": {\"first_name\": \"Mei\", \"last_name\": \"Davis\"}, \"address\": {\"address1\": \"698 Maple Drive\", \"address2\": \"Suite 465\", \"city\": \"Denver\", \"country\": \"USA\", \"state\": \"CO\", \"zip\": \"80217\"}, \"email\": \"mei.davis6811@example.com\", \"payment_methods\": {\"credit_card_1061405\": {\"source\": \"credit_card\", \"id\": \"credit_card_1061405\", \"brand\": \"mastercard\", \"last_four\": \"1037\"}}, \"orders\": [\"#W2890441\", \"#W1267569\"]}"
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+                  "value": {
+                    "stringValue": "get_order_details"
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+                {
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+                  "value": {
+                    "stringValue": "{\"order_id\": \"#W2890441\"}"
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+                {
+                  "key": "gen_ai.tool.call.result",
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+                  "key": "gen_ai.tool.name",
+                  "value": {
+                    "stringValue": "get_order_details"
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+                {
+                  "key": "gen_ai.tool.call.arguments",
+                  "value": {
+                    "stringValue": "{\"order_id\": \"#W1267569\"}"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.call.result",
+                  "value": {
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+                  "value": {
+                    "stringValue": "get_product_details"
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+                {
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+                  "value": {
+                    "stringValue": "{\"product_id\": \"4794339885\"}"
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+                  "key": "gen_ai.tool.call.result",
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+                    "stringValue": "{\"name\": \"Office Chair\", \"product_id\": \"4794339885\", \"variants\": {\"1793929609\": {\"item_id\": \"1793929609\", \"options\": {\"material\": \"fabric\", \"color\": \"black\", \"armrest\": \"none\", \"backrest height\": \"high-back\"}, \"available\": true, \"price\": 514.34}, \"4274709903\": {\"item_id\": \"4274709903\", \"options\": {\"material\": \"mesh\", \"color\": \"red\", \"armrest\": \"none\", \"backrest height\": \"standard\"}, \"available\": true, \"price\": 544.29}, \"8426249116\": {\"item_id\": \"8426249116\", \"options\": {\"material\": \"fabric\", \"color\": \"black\", \"armrest\": \"fixed\", \"backrest height\": \"standard\"}, \"available\": true, \"price\": 488.81}, \"1071497737\": {\"item_id\": \"1071497737\", \"options\": {\"material\": \"leather\", \"color\": \"gray\", \"armrest\": \"fixed\", \"backrest height\": \"high-back\"}, \"available\": true, \"price\": 483.95}, \"4168944673\": {\"item_id\": \"4168944673\", \"options\": {\"material\": \"leather\", \"color\": \"blue\", \"armrest\": \"none\", \"backrest height\": \"standard\"}, \"available\": true, \"price\": 471.82}, \"3704016729\": {\"item_id\": \"3704016729\", \"options\": {\"material\": \"mesh\", \"color\": \"blue\", \"armrest\": \"fixed\", \"backrest height\": \"standard\"}, \"available\": true, \"price\": 487.67}, \"8069050545\": {\"item_id\": \"8069050545\", \"options\": {\"material\": \"leather\", \"color\": \"blue\", \"armrest\": \"none\", \"backrest height\": \"high-back\"}, \"available\": true, \"price\": 499.28}, \"8323284863\": {\"item_id\": \"8323284863\", \"options\": {\"material\": \"fabric\", \"color\": \"blue\", \"armrest\": \"adjustable\", \"backrest height\": \"standard\"}, \"available\": true, \"price\": 511.24}, \"3609437808\": {\"item_id\": \"3609437808\", \"options\": {\"material\": \"leather\", \"color\": \"red\", \"armrest\": \"none\", \"backrest height\": \"high-back\"}, \"available\": false, \"price\": 466.44}, \"4648362606\": {\"item_id\": \"4648362606\", \"options\": {\"material\": \"leather\", \"color\": \"black\", \"armrest\": \"adjustable\", \"backrest height\": \"high-back\"}, \"available\": true, \"price\": 503.76}, \"2386562819\": {\"item_id\": \"2386562819\", \"options\": {\"material\": \"mesh\", \"color\": \"gray\", \"armrest\": \"fixed\", \"backrest height\": \"high-back\"}, \"available\": true, \"price\": 508.21}, \"3915604618\": {\"item_id\": \"3915604618\", \"options\": {\"material\": \"leather\", \"color\": \"blue\", \"armrest\": \"fixed\", \"backrest height\": \"standard\"}, \"available\": true, \"price\": 487.6}, \"9459890810\": {\"item_id\": \"9459890810\", \"options\": {\"material\": \"fabric\", \"color\": \"gray\", \"armrest\": \"none\", \"backrest height\": \"high-back\"}, \"available\": true, \"price\": 510.1}}}"
+                  }
+                }
+              ],
+              "status": {
+                "code": 0,
+                "message": ""
+              },
+              "parentSpanId": "32862204e9fc955a"
+            },
+            {
+              "traceId": "e058f9be20d72c97aa15a745f024edee",
+              "spanId": "32862204e9fc955a",
+              "name": "invoke_agent",
+              "startTimeUnixNano": "1793307242310056200",
+              "endTimeUnixNano": "1793307287976977800",
+              "attributes": [
+                {
+                  "key": "gen_ai.operation.name",
+                  "value": {
+                    "stringValue": "invoke_agent"
+                  }
+                },
+                {
+                  "key": "gen_ai.agent.name",
+                  "value": {
+                    "stringValue": "tau2-retail"
+                  }
+                },
+                {
+                  "key": "gen_ai.agent.id",
+                  "value": {
+                    "stringValue": "tau2-retail-18"
+                  }
+                },
+                {
+                  "key": "faultgate.scenario",
+                  "value": {
+                    "stringValue": "retail-18"
+                  }
+                },
+                {
+                  "key": "metadata.scenario",
+                  "value": {
+                    "stringValue": "retail-18"
+                  }
+                },
+                {
+                  "key": "gen_ai.prompt",
+                  "value": {
+                    "stringValue": "You want to return the office chair because it came with some broken pieces. But if the agent asks you for confirm, you say you want to rethink for a while, and then change your mind to exchange for the same item. If the agent mentions that the same product is not available, ask for a gray office chair with fixed armrest made of leather instead."
+                  }
+                },
+                {
+                  "key": "gen_ai.completion",
+                  "value": {
+                    "stringValue": "Understood \u2014 an **exchange** (replacement chair) instead of a return. Here are the details for order **#W2890441** (status: delivered):\n\n- **Item being exchanged:** 8069050545 \u2014 Office Chair, leather, blue, no armrests, high-back ($499.28)\n- **New item:** 8069050545 \u2014 the exact same chair, currently **in stock**\n- **Price difference:** $0.00 (nothing extra to pay)\n- **Payment method for any difference:** Mastercard ending in 1037\n\nTwo things to note before we proceed:\n1. An exchange can only be done **once** per order, so this will replace the broken chair with a new identical one and no further exchanges/returns will be possible on this order.\n2. After confirming, the order status becomes **\"exchange requested\"** and you'll receive an email with instructions on how to send back the broken chair and its pieces.\n\nShall I go ahead and request the exchange of the office chair (8069050545) for the same chair? **(yes/no)**"
+                  }
+                },
+                {
+                  "key": "faultgate.termination",
+                  "value": {
+                    "stringValue": "TerminationReason.USER_STOP"
+                  }
+                },
+                {
+                  "key": "enduser.id",
+                  "value": {
+                    "stringValue": "mei_davis_8935"
+                  }
+                }
+              ],
+              "status": {
+                "code": 0,
+                "message": ""
+              }
+            },
+            {
+              "traceId": "4cc6470c1816b795bd1b42e0f9e614af",
+              "spanId": "1d5e04d8278f1e1d",
+              "name": "execute_tool",
+              "startTimeUnixNano": "1793307295727303100",
+              "endTimeUnixNano": "1793307295727303100",
+              "attributes": [
+                {
+                  "key": "gen_ai.operation.name",
+                  "value": {
+                    "stringValue": "execute_tool"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.name",
+                  "value": {
+                    "stringValue": "find_user_id_by_name_zip"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.call.arguments",
+                  "value": {
+                    "stringValue": "{\"first_name\": \"Mei\", \"last_name\": \"Davis\", \"zip\": \"80217\"}"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.call.result",
+                  "value": {
+                    "stringValue": "mei_davis_8935"
+                  }
+                }
+              ],
+              "status": {
+                "code": 0,
+                "message": ""
+              },
+              "parentSpanId": "4a746cbb982b89a9"
+            },
+            {
+              "traceId": "4cc6470c1816b795bd1b42e0f9e614af",
+              "spanId": "4d39929f49b88792",
+              "name": "execute_tool",
+              "startTimeUnixNano": "1793307297440763600",
+              "endTimeUnixNano": "1793307297440763600",
+              "attributes": [
+                {
+                  "key": "gen_ai.operation.name",
+                  "value": {
+                    "stringValue": "execute_tool"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.name",
+                  "value": {
+                    "stringValue": "get_user_details"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.call.arguments",
+                  "value": {
+                    "stringValue": "{\"user_id\": \"mei_davis_8935\"}"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.call.result",
+                  "value": {
+                    "stringValue": "{\"user_id\": \"mei_davis_8935\", \"name\": {\"first_name\": \"Mei\", \"last_name\": \"Davis\"}, \"address\": {\"address1\": \"698 Maple Drive\", \"address2\": \"Suite 465\", \"city\": \"Denver\", \"country\": \"USA\", \"state\": \"CO\", \"zip\": \"80217\"}, \"email\": \"mei.davis6811@example.com\", \"payment_methods\": {\"credit_card_1061405\": {\"source\": \"credit_card\", \"id\": \"credit_card_1061405\", \"brand\": \"mastercard\", \"last_four\": \"1037\"}}, \"orders\": [\"#W2890441\", \"#W1267569\"]}"
+                  }
+                }
+              ],
+              "status": {
+                "code": 0,
+                "message": ""
+              },
+              "parentSpanId": "4a746cbb982b89a9"
+            },
+            {
+              "traceId": "4cc6470c1816b795bd1b42e0f9e614af",
+              "spanId": "0b08089bc60b88fe",
+              "name": "execute_tool",
+              "startTimeUnixNano": "1793307299142526100",
+              "endTimeUnixNano": "1793307299142526100",
+              "attributes": [
+                {
+                  "key": "gen_ai.operation.name",
+                  "value": {
+                    "stringValue": "execute_tool"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.name",
+                  "value": {
+                    "stringValue": "get_order_details"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.call.arguments",
+                  "value": {
+                    "stringValue": "{\"order_id\": \"#W2890441\"}"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.call.result",
+                  "value": {
+                    "stringValue": "{\"order_id\": \"#W2890441\", \"user_id\": \"mei_davis_8935\", \"address\": {\"address1\": \"698 Maple Drive\", \"address2\": \"Suite 465\", \"city\": \"Denver\", \"country\": \"USA\", \"state\": \"CO\", \"zip\": \"80217\"}, \"items\": [{\"name\": \"Water Bottle\", \"product_id\": \"8310926033\", \"item_id\": \"2366567022\", \"price\": 54.04, \"options\": {\"capacity\": \"1000ml\", \"material\": \"stainless steel\", \"color\": \"blue\"}}, {\"name\": \"Pet Bed\", \"product_id\": \"2747247837\", \"item_id\": \"2751999929\", \"price\": 195.11, \"options\": {\"size\": \"large\", \"material\": \"memory foam\", \"color\": \"grey\"}}, {\"name\": \"Office Chair\", \"product_id\": \"4794339885\", \"item_id\": \"8069050545\", \"price\": 499.28, \"options\": {\"material\": \"leather\", \"color\": \"blue\", \"armrest\": \"none\", \"backrest height\": \"high-back\"}}, {\"name\": \"Skateboard\", \"product_id\": \"1968349452\", \"item_id\": \"3877188862\", \"price\": 182.03, \"options\": {\"deck material\": \"plastic\", \"length\": \"31 inch\", \"design\": \"plain\"}}], \"status\": \"delivered\", \"fulfillments\": [{\"tracking_id\": [\"642796688644\"], \"item_ids\": [\"2366567022\", \"2751999929\", \"8069050545\", \"3877188862\"]}], \"payment_history\": [{\"transaction_type\": \"payment\", \"amount\": 930.46, \"payment_method_id\": \"credit_card_1061405\"}], \"cancel_reason\": null, \"exchange_items\": null, \"exchange_new_items\": null, \"exchange_payment_method_id\": null, \"exchange_price_difference\": null, \"return_items\": null, \"return_payment_method_id\": null}"
+                  }
+                }
+              ],
+              "status": {
+                "code": 0,
+                "message": ""
+              },
+              "parentSpanId": "4a746cbb982b89a9"
+            },
+            {
+              "traceId": "4cc6470c1816b795bd1b42e0f9e614af",
+              "spanId": "21f8c65263ce1580",
+              "name": "execute_tool",
+              "startTimeUnixNano": "1793307301513900200",
+              "endTimeUnixNano": "1793307301514905600",
+              "attributes": [
+                {
+                  "key": "gen_ai.operation.name",
+                  "value": {
+                    "stringValue": "execute_tool"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.name",
+                  "value": {
+                    "stringValue": "get_order_details"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.call.arguments",
+                  "value": {
+                    "stringValue": "{\"order_id\": \"#W1267569\"}"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.call.result",
+                  "value": {
+                    "stringValue": "{\"order_id\": \"#W1267569\", \"user_id\": \"mei_davis_8935\", \"address\": {\"address1\": \"698 Maple Drive\", \"address2\": \"Suite 465\", \"city\": \"Denver\", \"country\": \"USA\", \"state\": \"CO\", \"zip\": \"80217\"}, \"items\": [{\"name\": \"Gaming Mouse\", \"product_id\": \"5713490933\", \"item_id\": \"7420906769\", \"price\": 138.47, \"options\": {\"color\": \"white\", \"sensor type\": \"laser\", \"connectivity\": \"wireless\"}}, {\"name\": \"Headphones\", \"product_id\": \"6992792935\", \"item_id\": \"7493556126\", \"price\": 346.97, \"options\": {\"type\": \"over-ear\", \"connectivity\": \"wireless\", \"color\": \"black\"}}, {\"name\": \"Air Purifier\", \"product_id\": \"3821016478\", \"item_id\": \"1327854740\", \"price\": 492.65, \"options\": {\"room size\": \"medium\", \"filter type\": \"HEPA\", \"features\": \"night mode\"}}, {\"name\": \"Smart Thermostat\", \"product_id\": \"4896585277\", \"item_id\": \"6243148452\", \"price\": 247.0, \"options\": {\"compatibility\": \"Amazon Alexa\", \"color\": \"stainless steel\"}}, {\"name\": \"Wireless Earbuds\", \"product_id\": \"9924732112\", \"item_id\": \"5565631513\", \"price\": 267.9, \"options\": {\"color\": \"black\", \"battery life\": \"6 hours\", \"water resistance\": \"IPX7\"}}], \"status\": \"pending\", \"fulfillments\": [], \"payment_history\": [{\"transaction_type\": \"payment\", \"amount\": 1492.99, \"payment_method_id\": \"credit_card_1061405\"}], \"cancel_reason\": null, \"exchange_items\": null, \"exchange_new_items\": null, \"exchange_payment_method_id\": null, \"exchange_price_difference\": null, \"return_items\": null, \"return_payment_method_id\": null}"
+                  }
+                }
+              ],
+              "status": {
+                "code": 0,
+                "message": ""
+              },
+              "parentSpanId": "4a746cbb982b89a9"
+            },
+            {
+              "traceId": "4cc6470c1816b795bd1b42e0f9e614af",
+              "spanId": "c9cefd7fe8bb3f8d",
+              "name": "execute_tool",
+              "startTimeUnixNano": "1793307306302940500",
+              "endTimeUnixNano": "1793307306302940500",
+              "attributes": [
+                {
+                  "key": "gen_ai.operation.name",
+                  "value": {
+                    "stringValue": "execute_tool"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.name",
+                  "value": {
+                    "stringValue": "get_product_details"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.call.arguments",
+                  "value": {
+                    "stringValue": "{\"product_id\": \"2747247837\"}"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.call.result",
+                  "value": {
+                    "stringValue": "{\"name\": \"Pet Bed\", \"product_id\": \"2747247837\", \"variants\": {\"3360679910\": {\"item_id\": \"3360679910\", \"options\": {\"size\": \"medium\", \"material\": \"memory foam\", \"color\": \"beige\"}, \"available\": true, \"price\": 195.26}, \"4537595158\": {\"item_id\": \"4537595158\", \"options\": {\"size\": \"small\", \"material\": \"fleece\", \"color\": \"brown\"}, \"available\": false, \"price\": 193.79}, \"6499892866\": {\"item_id\": \"6499892866\", \"options\": {\"size\": \"medium\", \"material\": \"polyester\", \"color\": \"beige\"}, \"available\": true, \"price\": 191.21}, \"4982943126\": {\"item_id\": \"4982943126\", \"options\": {\"size\": \"small\", \"material\": \"fleece\", \"color\": \"beige\"}, \"available\": false, \"price\": 214.33}, \"2751999929\": {\"item_id\": \"2751999929\", \"options\": {\"size\": \"large\", \"material\": \"memory foam\", \"color\": \"grey\"}, \"available\": true, \"price\": 195.11}, \"7729002517\": {\"item_id\": \"7729002517\", \"options\": {\"size\": \"large\", \"material\": \"polyester\", \"color\": \"brown\"}, \"available\": true, \"price\": 193.0}, \"8056198669\": {\"item_id\": \"8056198669\", \"options\": {\"size\": \"small\", \"material\": \"polyester\", \"color\": \"brown\"}, \"available\": true, \"price\": 208.32}, \"5067898160\": {\"item_id\": \"5067898160\", \"options\": {\"size\": \"medium\", \"material\": \"memory foam\", \"color\": \"brown\"}, \"available\": false, \"price\": 209.95}, \"6857426243\": {\"item_id\": \"6857426243\", \"options\": {\"size\": \"medium\", \"material\": \"fleece\", \"color\": \"grey\"}, \"available\": true, \"price\": 196.53}, \"2405281423\": {\"item_id\": \"2405281423\", \"options\": {\"size\": \"medium\", \"material\": \"polyester\", \"color\": \"grey\"}, \"available\": true, \"price\": 204.09}, \"7917269097\": {\"item_id\": \"7917269097\", \"options\": {\"size\": \"large\", \"material\": \"polyester\", \"color\": \"grey\"}, \"available\": true, \"price\": 184.25}, \"6942241102\": {\"item_id\": \"6942241102\", \"options\": {\"size\": \"large\", \"material\": \"memory foam\", \"color\": \"beige\"}, \"available\": true, \"price\": 180.93}, \"8941974610\": {\"item_id\": \"8941974610\", \"options\": {\"size\": \"large\", \"material\": \"fleece\", \"color\": \"beige\"}, \"available\": false, \"price\": 200.66}, \"7381052709\": {\"item_id\": \"7381052709\", \"options\": {\"size\": \"large\", \"material\": \"memory foam\", \"color\": \"brown\"}, \"available\": true, \"price\": 193.22}, \"5109407456\": {\"item_id\": \"5109407456\", \"options\": {\"size\": \"small\", \"material\": \"fleece\", \"color\": \"grey\"}, \"available\": true, \"price\": 182.48}}}"
+                  }
+                }
+              ],
+              "status": {
+                "code": 0,
+                "message": ""
+              },
+              "parentSpanId": "4a746cbb982b89a9"
+            },
+            {
+              "traceId": "4cc6470c1816b795bd1b42e0f9e614af",
+              "spanId": "1c829006d1da14c0",
+              "name": "execute_tool",
+              "startTimeUnixNano": "1793307311229280200",
+              "endTimeUnixNano": "1793307311229849300",
+              "attributes": [
+                {
+                  "key": "gen_ai.operation.name",
+                  "value": {
+                    "stringValue": "execute_tool"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.name",
+                  "value": {
+                    "stringValue": "get_product_details"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.call.arguments",
+                  "value": {
+                    "stringValue": "{\"product_id\": \"4794339885\"}"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.call.result",
+                  "value": {
+                    "stringValue": "{\"name\": \"Office Chair\", \"product_id\": \"4794339885\", \"variants\": {\"1793929609\": {\"item_id\": \"1793929609\", \"options\": {\"material\": \"fabric\", \"color\": \"black\", \"armrest\": \"none\", \"backrest height\": \"high-back\"}, \"available\": true, \"price\": 514.34}, \"4274709903\": {\"item_id\": \"4274709903\", \"options\": {\"material\": \"mesh\", \"color\": \"red\", \"armrest\": \"none\", \"backrest height\": \"standard\"}, \"available\": true, \"price\": 544.29}, \"8426249116\": {\"item_id\": \"8426249116\", \"options\": {\"material\": \"fabric\", \"color\": \"black\", \"armrest\": \"fixed\", \"backrest height\": \"standard\"}, \"available\": true, \"price\": 488.81}, \"1071497737\": {\"item_id\": \"1071497737\", \"options\": {\"material\": \"leather\", \"color\": \"gray\", \"armrest\": \"fixed\", \"backrest height\": \"high-back\"}, \"available\": true, \"price\": 483.95}, \"4168944673\": {\"item_id\": \"4168944673\", \"options\": {\"material\": \"leather\", \"color\": \"blue\", \"armrest\": \"none\", \"backrest height\": \"standard\"}, \"available\": true, \"price\": 471.82}, \"3704016729\": {\"item_id\": \"3704016729\", \"options\": {\"material\": \"mesh\", \"color\": \"blue\", \"armrest\": \"fixed\", \"backrest height\": \"standard\"}, \"available\": true, \"price\": 487.67}, \"8069050545\": {\"item_id\": \"8069050545\", \"options\": {\"material\": \"leather\", \"color\": \"blue\", \"armrest\": \"none\", \"backrest height\": \"high-back\"}, \"available\": true, \"price\": 499.28}, \"8323284863\": {\"item_id\": \"8323284863\", \"options\": {\"material\": \"fabric\", \"color\": \"blue\", \"armrest\": \"adjustable\", \"backrest height\": \"standard\"}, \"available\": true, \"price\": 511.24}, \"3609437808\": {\"item_id\": \"3609437808\", \"options\": {\"material\": \"leather\", \"color\": \"red\", \"armrest\": \"none\", \"backrest height\": \"high-back\"}, \"available\": false, \"price\": 466.44}, \"4648362606\": {\"item_id\": \"4648362606\", \"options\": {\"material\": \"leather\", \"color\": \"black\", \"armrest\": \"adjustable\", \"backrest height\": \"high-back\"}, \"available\": true, \"price\": 503.76}, \"2386562819\": {\"item_id\": \"2386562819\", \"options\": {\"material\": \"mesh\", \"color\": \"gray\", \"armrest\": \"fixed\", \"backrest height\": \"high-back\"}, \"available\": true, \"price\": 508.21}, \"3915604618\": {\"item_id\": \"3915604618\", \"options\": {\"material\": \"leather\", \"color\": \"blue\", \"armrest\": \"fixed\", \"backrest height\": \"standard\"}, \"available\": true, \"price\": 487.6}, \"9459890810\": {\"item_id\": \"9459890810\", \"options\": {\"material\": \"fabric\", \"color\": \"gray\", \"armrest\": \"none\", \"backrest height\": \"high-back\"}, \"available\": true, \"price\": 510.1}}}"
+                  }
+                }
+              ],
+              "status": {
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+                "message": ""
+              },
+              "parentSpanId": "4a746cbb982b89a9"
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+            {
+              "traceId": "4cc6470c1816b795bd1b42e0f9e614af",
+              "spanId": "129a36d225a3638c",
+              "name": "execute_tool",
+              "startTimeUnixNano": "1793307342593787500",
+              "endTimeUnixNano": "1793307342593787500",
+              "attributes": [
+                {
+                  "key": "gen_ai.operation.name",
+                  "value": {
+                    "stringValue": "execute_tool"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.name",
+                  "value": {
+                    "stringValue": "return_delivered_order_items"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.call.arguments",
+                  "value": {
+                    "stringValue": "{\"order_id\": \"#W2890441\", \"item_ids\": [\"2366567022\"], \"payment_method_id\": \"credit_card_1061405\"}"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.call.result",
+                  "value": {
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+                  "key": "gen_ai.tool.call.result",
+                  "value": {
+                    "stringValue": "{\"name\": \"Mechanical Keyboard\", \"product_id\": \"1656367028\", \"variants\": {\"9690244451\": {\"item_id\": \"9690244451\", \"options\": {\"switch type\": \"clicky\", \"backlight\": \"RGB\", \"size\": \"60%\"}, \"available\": false, \"price\": 236.51}, \"7706410293\": {\"item_id\": \"7706410293\", \"options\": {\"switch type\": \"clicky\", \"backlight\": \"none\", \"size\": \"full size\"}, \"available\": true, \"price\": 269.16}, \"3616838507\": {\"item_id\": \"3616838507\", \"options\": {\"switch type\": \"tactile\", \"backlight\": \"white\", \"size\": \"full size\"}, \"available\": true, \"price\": 226.11}, \"8484921793\": {\"item_id\": \"8484921793\", \"options\": {\"switch type\": \"linear\", \"backlight\": \"RGB\", \"size\": \"80%\"}, \"available\": true, \"price\": 230.15}, \"1340995114\": {\"item_id\": \"1340995114\", \"options\": {\"switch type\": \"tactile\", \"backlight\": \"none\", \"size\": \"full size\"}, \"available\": false, \"price\": 235.13}, \"6342039236\": {\"item_id\": \"6342039236\", \"options\": {\"switch type\": \"clicky\", \"backlight\": \"white\", \"size\": \"full size\"}, \"available\": true, \"price\": 244.91}, \"1421289881\": {\"item_id\": \"1421289881\", \"options\": {\"switch type\": \"linear\", \"backlight\": \"none\", \"size\": \"80%\"}, \"available\": true, \"price\": 268.77}, \"7867398203\": {\"item_id\": \"7867398203\", \"options\": {\"switch type\": \"linear\", \"backlight\": \"RGB\", \"size\": \"60%\"}, \"available\": true, \"price\": 232.7}, \"4648814700\": {\"item_id\": \"4648814700\", \"options\": {\"switch type\": \"linear\", \"backlight\": \"white\", \"size\": \"60%\"}, \"available\": false, \"price\": 228.84}, \"5222576926\": {\"item_id\": \"5222576926\", \"options\": {\"switch type\": \"linear\", \"backlight\": \"white\", \"size\": \"full size\"}, \"available\": false, \"price\": 249.95}, \"4402162122\": {\"item_id\": \"4402162122\", \"options\": {\"switch type\": \"tactile\", \"backlight\": \"RGB\", \"size\": \"60%\"}, \"available\": true, \"price\": 233.9}, \"1151293680\": {\"item_id\": \"1151293680\", \"options\": {\"switch type\": \"linear\", \"backlight\": \"RGB\", \"size\": \"full size\"}, \"available\": true, \"price\": 272.33}, \"2299424241\": {\"item_id\": \"2299424241\", \"options\": {\"switch type\": \"clicky\", \"backlight\": \"RGB\", \"size\": \"80%\"}, \"available\": true, \"price\": 237.48}, \"4843487907\": {\"item_id\": \"4843487907\", \"options\": {\"switch type\": \"clicky\", \"backlight\": \"white\", \"size\": \"80%\"}, \"available\": false, \"price\": 254.84}, \"9025753381\": {\"item_id\": \"9025753381\", \"options\": {\"switch type\": \"clicky\", \"backlight\": \"RGB\", \"size\": \"full size\"}, \"available\": false, \"price\": 231.58}, \"6439196450\": {\"item_id\": \"6439196450\", \"options\": {\"switch type\": \"tactile\", \"backlight\": \"none\", \"size\": \"60%\"}, \"available\": false, \"price\": 254.56}, \"9991484137\": {\"item_id\": \"9991484137\", \"options\": {\"switch type\": \"tactile\", \"backlight\": \"white\", \"size\": \"80%\"}, \"available\": true, \"price\": 240.97}, \"9665000388\": {\"item_id\": \"9665000388\", \"options\": {\"switch type\": \"clicky\", \"backlight\": \"none\", \"size\": \"80%\"}, \"available\": true, \"price\": 269.46}, \"9570044148\": {\"item_id\": \"9570044148\", \"options\": {\"switch type\": \"linear\", \"backlight\": \"none\", \"size\": \"full size\"}, \"available\": true, \"price\": 231.37}, \"7658724607\": {\"item_id\": \"7658724607\", \"options\": {\"switch type\": \"tactile\", \"backlight\": \"none\", \"size\": \"80%\"}, \"available\": true, \"price\": 256.73}}}"
+                  }
+                }
+              ],
+              "status": {
+                "code": 0,
+                "message": ""
+              },
+              "parentSpanId": "e933ccab124f8f30"
+            },
+            {
+              "traceId": "e3f1c31efa7fa8df34b49ddb215b6524",
+              "spanId": "dbe505f530ff52ed",
+              "name": "execute_tool",
+              "startTimeUnixNano": "1793307465811580000",
+              "endTimeUnixNano": "1793307465811580000",
+              "attributes": [
+                {
+                  "key": "gen_ai.operation.name",
+                  "value": {
+                    "stringValue": "execute_tool"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.name",
+                  "value": {
+                    "stringValue": "modify_pending_order_items"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.call.arguments",
+                  "value": {
+                    "stringValue": "{\"new_item_ids\": [\"4107812777\", \"1421289881\"], \"order_id\": \"#W9911714\", \"item_ids\": [\"9791469541\", \"1340995114\"], \"payment_method_id\": \"gift_card_4332117\"}"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.call.result",
+                  "value": {
+                    "stringValue": "{\"order_id\": \"#W9911714\", \"user_id\": \"ethan_garcia_1261\", \"address\": {\"address1\": \"667 Highland Drive\", \"address2\": \"Suite 865\", \"city\": \"Denver\", \"country\": \"USA\", \"state\": \"CO\", \"zip\": \"80280\"}, \"items\": [{\"name\": \"Water Bottle\", \"product_id\": \"8310926033\", \"item_id\": \"2366567022\", \"price\": 54.04, \"options\": {\"capacity\": \"1000ml\", \"material\": \"stainless steel\", \"color\": \"blue\"}}, {\"name\": \"Mechanical Keyboard\", \"product_id\": \"1656367028\", \"item_id\": \"1421289881\", \"price\": 268.77, \"options\": {\"switch type\": \"linear\", \"backlight\": \"none\", \"size\": \"80%\"}}, {\"name\": \"Running Shoes\", \"product_id\": \"6938111410\", \"item_id\": \"4107812777\", \"price\": 268.77, \"options\": {\"switch type\": \"linear\", \"backlight\": \"none\", \"size\": \"80%\"}}, {\"name\": \"Makeup Kit\", \"product_id\": \"5149340237\", \"item_id\": \"1763705424\", \"price\": 235.44, \"options\": {\"skin tone\": \"dark\", \"kit size\": \"professional\", \"brand\": \"Brand C\"}}], \"status\": \"pending (item modified)\", \"fulfillments\": [], \"payment_history\": [{\"transaction_type\": \"payment\", \"amount\": 671.66, \"payment_method_id\": \"paypal_3798357\"}, {\"transaction_type\": \"payment\", \"amount\": 41.91999999999999, \"payment_method_id\": \"gift_card_4332117\"}], \"cancel_reason\": null, \"exchange_items\": null, \"exchange_new_items\": null, \"exchange_payment_method_id\": null, \"exchange_price_difference\": null, \"return_items\": null, \"return_payment_method_id\": null}"
+                  }
+                }
+              ],
+              "status": {
+                "code": 0,
+                "message": ""
+              },
+              "parentSpanId": "e933ccab124f8f30"
+            },
+            {
+              "traceId": "e3f1c31efa7fa8df34b49ddb215b6524",
+              "spanId": "6982a18eb5c10cc1",
+              "name": "execute_tool",
+              "startTimeUnixNano": "1793307469740117800",
+              "endTimeUnixNano": "1793307469740117800",
+              "attributes": [
+                {
+                  "key": "gen_ai.operation.name",
+                  "value": {
+                    "stringValue": "execute_tool"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.name",
+                  "value": {
+                    "stringValue": "get_user_details"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.call.arguments",
+                  "value": {
+                    "stringValue": "{\"user_id\": \"ethan_garcia_1261\"}"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.call.result",
+                  "value": {
+                    "stringValue": "{\"user_id\": \"ethan_garcia_1261\", \"name\": {\"first_name\": \"Ethan\", \"last_name\": \"Garcia\"}, \"address\": {\"address1\": \"667 Highland Drive\", \"address2\": \"Suite 865\", \"city\": \"Denver\", \"country\": \"USA\", \"state\": \"CO\", \"zip\": \"80280\"}, \"email\": \"ethan.garcia8085@example.com\", \"payment_methods\": {\"paypal_3798357\": {\"source\": \"paypal\", \"id\": \"paypal_3798357\"}, \"gift_card_4332117\": {\"source\": \"gift_card\", \"id\": \"gift_card_4332117\", \"balance\": 44.08}}, \"orders\": [\"#W4967593\", \"#W9911714\", \"#W5733668\"]}"
+                  }
+                }
+              ],
+              "status": {
+                "code": 0,
+                "message": ""
+              },
+              "parentSpanId": "e933ccab124f8f30"
+            },
+            {
+              "traceId": "e3f1c31efa7fa8df34b49ddb215b6524",
+              "spanId": "e933ccab124f8f30",
+              "name": "invoke_agent",
+              "startTimeUnixNano": "1793307360064533500",
+              "endTimeUnixNano": "1793307490593047000",
+              "attributes": [
+                {
+                  "key": "gen_ai.operation.name",
+                  "value": {
+                    "stringValue": "invoke_agent"
+                  }
+                },
+                {
+                  "key": "gen_ai.agent.name",
+                  "value": {
+                    "stringValue": "tau2-retail"
+                  }
+                },
+                {
+                  "key": "gen_ai.agent.id",
+                  "value": {
+                    "stringValue": "tau2-retail-21"
+                  }
+                },
+                {
+                  "key": "faultgate.scenario",
+                  "value": {
+                    "stringValue": "retail-21"
+                  }
+                },
+                {
+                  "key": "metadata.scenario",
+                  "value": {
+                    "stringValue": "retail-21"
+                  }
+                },
+                {
+                  "key": "gen_ai.prompt",
+                  "value": {
+                    "stringValue": "You want to exchange your shoes to item ID 4107812777, and use your gift card to cover possible charges. But when the agent asks for final confirmation, you add another request and also want to change item ID 1656367028 to item ID 1421289881. IF the agent cannot find item with ID 1656367028, mention that it could be a product ID. You are not familiar with the domain and might confuse product and item ids, so ask the agent to figure out the details on its own if needed. You want to know your gift card balance after all these changes are complete."
+                  }
+                },
+                {
+                  "key": "gen_ai.completion",
+                  "value": {
+                    "stringValue": "All set! Both changes have been applied to order **#W9911714**.\n\n**What changed**\n- Running Shoes: 9791469541 (size 9, yellow) \u2192 **4107812777** (size 9, black)\n- Mechanical Keyboard: 1340995114 (tactile, full size) \u2192 **1421289881** (linear, 80%)\n\n**Charges**\n- Total difference paid to gift card 4332117: **$41.92** ($8.28 + $33.64)\n- Starting balance: $86.00 \u2192 **Current gift card balance: $44.08**\n\nThe order status is now **\"pending (item modified)\"** \u2014 it will still ship, but please note it can't be modified or cancelled any further.\n\nOne heads-up: the system record displays the shoes line with the keyboard's option details, which appears to be a display glitch \u2014 your payment total is correct. If you'd like that cleaned up on the order record, I can connect you with a human agent."
+                  }
+                },
+                {
+                  "key": "faultgate.termination",
+                  "value": {
+                    "stringValue": "TerminationReason.USER_STOP"
+                  }
+                },
+                {
+                  "key": "enduser.id",
+                  "value": {
+                    "stringValue": "ethan_garcia_1261"
+                  }
+                }
+              ],
+              "status": {
+                "code": 0,
+                "message": ""
+              }
+            }
+          ]
+        }
+      ]
+    }
+  ]
+}
\ No newline at end of file
diff --git a/evals/tau2_retail/artifacts/smoke/check.txt b/evals/tau2_retail/artifacts/smoke/check.txt
new file mode 100644
index 0000000..c3ce133
--- /dev/null
+++ b/evals/tau2_retail/artifacts/smoke/check.txt
@@ -0,0 +1,10 @@
+note: wrong_direction skipped - it needs a judge (--judge laya | litellm:<model>); see README for each judge's measured \u03ba
+note: wrong_answer skipped - it needs --golden golden.json (expected answers)
+note: truncation skipped - it needs --golden golden.json (expected answers)
+trace         search_loop       abstention        policy            repeated_call     unrecovered_tool_error  context_overflow
+------------------------------------------------------------------------------------------------------------------------------
+dea22d765390  ok   1.00         ok   1.00         ok   1.00         ok   1.00         ok   1.00         ok   1.00       
+5ff059f89003  ok   1.00         ok   1.00         ok   1.00         ok   1.00         ok   1.00         ok   1.00       
+0/2 traces failed - search_loop=0, abstention=0, policy=0, repeated_call=0, unrecovered_tool_error=0, context_overflow=0 - judge none - 0.0s
+report written to faultgate\evals\tau2_retail\artifacts\smoke\faultgate-report.json
+EXIT=0
diff --git a/evals/tau2_retail/artifacts/smoke/comparison.json b/evals/tau2_retail/artifacts/smoke/comparison.json
new file mode 100644
index 0000000..062c952
--- /dev/null
+++ b/evals/tau2_retail/artifacts/smoke/comparison.json
@@ -0,0 +1,16 @@
+[
+  {
+    "task_id": "0",
+    "tau2_reward": 1.0,
+    "tau2_pass": true,
+    "faultgate_pass": true,
+    "fired": []
+  },
+  {
+    "task_id": "16",
+    "tau2_reward": 1.0,
+    "tau2_pass": true,
+    "faultgate_pass": true,
+    "fired": []
+  }
+]
\ No newline at end of file
diff --git a/evals/tau2_retail/artifacts/smoke/comparison.txt b/evals/tau2_retail/artifacts/smoke/comparison.txt
new file mode 100644
index 0000000..5b304e7
--- /dev/null
+++ b/evals/tau2_retail/artifacts/smoke/comparison.txt
@@ -0,0 +1,6 @@
+task   tau2  faultgate  checks
+   0    1.0       pass  -
+  16    1.0       pass  -
+agreement: 2/2
+tau2 pass / faultgate fail (false positive or process-only): 0
+tau2 fail / faultgate pass (outside its checks): 0
diff --git a/evals/tau2_retail/artifacts/smoke/cost.json b/evals/tau2_retail/artifacts/smoke/cost.json
new file mode 100644
index 0000000..8c5e157
--- /dev/null
+++ b/evals/tau2_retail/artifacts/smoke/cost.json
@@ -0,0 +1,8 @@
+{
+  "calls": 35,
+  "prompt_tokens": 189276,
+  "completion_tokens": 8251,
+  "models": {
+    "openai/qwen3.8-flash": 35
+  }
+}
\ No newline at end of file
diff --git a/evals/tau2_retail/artifacts/smoke/faultgate-report.json b/evals/tau2_retail/artifacts/smoke/faultgate-report.json
new file mode 100644
index 0000000..c728d09
--- /dev/null
+++ b/evals/tau2_retail/artifacts/smoke/faultgate-report.json
@@ -0,0 +1,132 @@
+{
+ "judge": "none",
+ "checks": [
+  "search_loop",
+  "abstention",
+  "policy",
+  "repeated_call",
+  "unrecovered_tool_error",
+  "context_overflow"
+ ],
+ "redaction": "builtin",
+ "traces": 2,
+ "failed_traces": [],
+ "fired": {
+  "search_loop": 0,
+  "abstention": 0,
+  "policy": 0,
+  "repeated_call": 0,
+  "unrecovered_tool_error": 0,
+  "context_overflow": 0
+ },
+ "measures": {
+  "dea22d7653904b435a847b96375feb16": {
+   "tokens": null,
+   "latency_ms": 120965.511,
+   "cost_usd": null
+  },
+  "5ff059f8900378f7eed85f1f2bb62c58": {
+   "tokens": null,
+   "latency_ms": 77032.1665,
+   "cost_usd": null
+  }
+ },
+ "results": [
+  {
+   "trace_id": "dea22d7653904b435a847b96375feb16",
+   "scenario": "retail-0",
+   "check": "search_loop",
+   "detected": false,
+   "confidence": 1.0,
+   "reason": "answered"
+  },
+  {
+   "trace_id": "dea22d7653904b435a847b96375feb16",
+   "scenario": "retail-0",
+   "check": "abstention",
+   "detected": false,
+   "confidence": 1.0,
+   "reason": "answer does not abstain"
+  },
+  {
+   "trace_id": "dea22d7653904b435a847b96375feb16",
+   "scenario": "retail-0",
+   "check": "policy",
+   "detected": false,
+   "confidence": 1.0,
+   "reason": "8 calls within policy"
+  },
+  {
+   "trace_id": "dea22d7653904b435a847b96375feb16",
+   "scenario": "retail-0",
+   "check": "repeated_call",
+   "detected": false,
+   "confidence": 1.0,
+   "reason": "no repeated calls without progress"
+  },
+  {
+   "trace_id": "dea22d7653904b435a847b96375feb16",
+   "scenario": "retail-0",
+   "check": "unrecovered_tool_error",
+   "detected": false,
+   "confidence": 1.0,
+   "reason": "no unrecovered tool errors"
+  },
+  {
+   "trace_id": "dea22d7653904b435a847b96375feb16",
+   "scenario": "retail-0",
+   "check": "context_overflow",
+   "detected": false,
+   "confidence": 1.0,
+   "reason": "no context overflow or token cutoff"
+  },
+  {
+   "trace_id": "5ff059f8900378f7eed85f1f2bb62c58",
+   "scenario": "retail-16",
+   "check": "search_loop",
+   "detected": false,
+   "confidence": 1.0,
+   "reason": "answered"
+  },
+  {
+   "trace_id": "5ff059f8900378f7eed85f1f2bb62c58",
+   "scenario": "retail-16",
+   "check": "abstention",
+   "detected": false,
+   "confidence": 1.0,
+   "reason": "answer does not abstain"
+  },
+  {
+   "trace_id": "5ff059f8900378f7eed85f1f2bb62c58",
+   "scenario": "retail-16",
+   "check": "policy",
+   "detected": false,
+   "confidence": 1.0,
+   "reason": "8 calls within policy"
+  },
+  {
+   "trace_id": "5ff059f8900378f7eed85f1f2bb62c58",
+   "scenario": "retail-16",
+   "check": "repeated_call",
+   "detected": false,
+   "confidence": 1.0,
+   "reason": "no repeated calls without progress"
+  },
+  {
+   "trace_id": "5ff059f8900378f7eed85f1f2bb62c58",
+   "scenario": "retail-16",
+   "check": "unrecovered_tool_error",
+   "detected": false,
+   "confidence": 1.0,
+   "reason": "no unrecovered tool errors"
+  },
+  {
+   "trace_id": "5ff059f8900378f7eed85f1f2bb62c58",
+   "scenario": "retail-16",
+   "check": "context_overflow",
+   "detected": false,
+   "confidence": 1.0,
+   "reason": "no context overflow or token cutoff"
+  }
+ ]
+}
\ No newline at end of file
diff --git a/evals/tau2_retail/artifacts/smoke/precheck.txt b/evals/tau2_retail/artifacts/smoke/precheck.txt
new file mode 100644
index 0000000..2eac18b
--- /dev/null
+++ b/evals/tau2_retail/artifacts/smoke/precheck.txt
@@ -0,0 +1,3 @@
+policy keys: allow, max_calls_per_arg, required_args, requires (after, invalidated_by, latest, result, same_arg, success, tool), values
+precheck: OK - format otlp - checked 2 of 2 traces - 16 tool steps read - 0 error(s), 0 warning(s)
+EXIT=0
diff --git a/evals/tau2_retail/artifacts/smoke/results.json b/evals/tau2_retail/artifacts/smoke/results.json
new file mode 100644
index 0000000..4466607
--- /dev/null
+++ b/evals/tau2_retail/artifacts/smoke/results.json
@@ -0,0 +1,324 @@
+{
+  "tau2_commit": "7aad81c37a3a78b4ed3e4866769f851400c64415",
+  "model": "openai/qwen3.8-flash",
+  "user_model": "openai/qwen3.8-flash",
+  "task_ids": [
+    "0",
+    "16"
+  ],
+  "generated_at": "2026-10-29T20:45:15Z",
+  "wall_s": 198.084,
+  "tasks": [
+    {
+      "task_id": "0",
+      "purpose": "You received your order #W2378156 and wish to exchange the mechanical keyboard for the same one but with clicky switches and the smart thermostat for one compatible with Google Home instead of Apple HomeKit. If there is no keyboard that is clicky, RGB backlight, full size, you'd go for no backlight.",
+      "reward": 1.0,
+      "termination_reason": "TerminationReason.USER_STOP",
+      "duration_s": 120.802,
+      "answer": "The exchange has been submitted successfully.\n\n- **Order:** #W2378156  \n- **Status:** Exchange requested  \n- **Keyboard:** Clicky, no backlight, full size  \n- **Thermostat:** Google Assistant, black  \n- **Refund:** $16.63 to the Mastercard ending in **2478**\n\nYour email address associated with the account is **yusuf.rossi7301@example.com**. The return instructions will be sent to that address, and the exchange is recorded in the order details. If the email doesn\u2019t arrive, you can contact us with the order ID to check its status.",
+      "reward_info": {
+        "reward": 1.0,
+        "db_check": {
+          "db_match": true,
+          "db_reward": 1.0
+        },
+        "env_assertions": [],
+        "action_checks": [
+          {
+            "action": {
+              "action_id": "0_0",
+              "requestor": "assistant",
+              "name": "find_user_id_by_name_zip",
+              "arguments": {
+                "first_name": "Yusuf",
+                "last_name": "Rossi",
+                "zip": "19122"
+              },
+              "info": null,
+              "compare_args": null
+            },
+            "action_match": true,
+            "action_reward": 1.0,
+            "tool_type": "read"
+          },
+          {
+            "action": {
+              "action_id": "0_1",
+              "requestor": "assistant",
+              "name": "get_order_details",
+              "arguments": {
+                "order_id": "#W2378156"
+              },
+              "info": null,
+              "compare_args": null
+            },
+            "action_match": true,
+            "action_reward": 1.0,
+            "tool_type": "read"
+          },
+          {
+            "action": {
+              "action_id": "0_2",
+              "requestor": "assistant",
+              "name": "get_product_details",
+              "arguments": {
+                "product_id": "1656367028"
+              },
+              "info": null,
+              "compare_args": null
+            },
+            "action_match": true,
+            "action_reward": 1.0,
+            "tool_type": "read"
+          },
+          {
+            "action": {
+              "action_id": "0_3",
+              "requestor": "assistant",
+              "name": "get_product_details",
+              "arguments": {
+                "product_id": "4896585277"
+              },
+              "info": null,
+              "compare_args": null
+            },
+            "action_match": true,
+            "action_reward": 1.0,
+            "tool_type": "read"
+          },
+          {
+            "action": {
+              "action_id": "0_4",
+              "requestor": "assistant",
+              "name": "exchange_delivered_order_items",
+              "arguments": {
+                "order_id": "#W2378156",
+                "item_ids": [
+                  "1151293680",
+                  "4983901480"
+                ],
+                "new_item_ids": [
+                  "7706410293",
+                  "7747408585"
+                ],
+                "payment_method_id": "credit_card_9513926"
+              },
+              "info": null,
+              "compare_args": null
+            },
+            "action_match": true,
+            "action_reward": 1.0,
+            "tool_type": "write"
+          }
+        ],
+        "nl_assertions": [],
+        "communicate_checks": null,
+        "reward_basis": [
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+          "NL_ASSERTION"
+        ],
+        "reward_breakdown": {
+          "DB": 1.0,
+          "NL_ASSERTION": 1.0
+        },
+        "info": {
+          "env": null,
+          "nl": {
+            "note": "No nl_assertions to evaluate"
+          },
+          "communicate": null,
+          "action": null
+        }
+      },
+      "tool_steps": 8,
+      "wall_s": 120.966,
+      "authenticated_user_id": "yusuf_rossi_9620"
+    },
+    {
+      "task_id": "16",
+      "purpose": "You want to cancel all pending orders (since they are no longer needed) and return the watch you have received (but nothing else), and you want to know the total amount you can get back.",
+      "reward": 1.0,
+      "termination_reason": "TerminationReason.USER_STOP",
+      "duration_s": 71.739,
+      "answer": "All done, Fatima! Here's a summary of what was completed:\n\n**Cancelled orders (reason: \"no longer needed\"):**\n- **#W5199551** \u2014 $3,131.10 refunded to PayPal (5\u20137 business days)\n- **#W8665881** \u2014 $4,777.75 refunded to PayPal (5\u20137 business days)\n\n**Return requested:**\n- **#W9389413** \u2014 Smart Watch (gold / metal band / AMOLED, $367.38) only. The Hiking Boots, Mechanical Keyboard, and T-Shirt from that order remain yours. Refund goes to your original PayPal (5\u20137 business days). You'll receive an email with instructions on how and where to return the watch.\n\n**Total amount you'll get back: $8,276.23**\n\nIs there anything else I can help you with?",
+      "reward_info": {
+        "reward": 1.0,
+        "db_check": {
+          "db_match": true,
+          "db_reward": 1.0
+        },
+        "env_assertions": [],
+        "action_checks": [
+          {
+            "action": {
+              "action_id": "16_0",
+              "requestor": "assistant",
+              "name": "find_user_id_by_name_zip",
+              "arguments": {
+                "first_name": "Fatima",
+                "last_name": "Johnson",
+                "zip": "78712"
+              },
+              "info": null,
+              "compare_args": null
+            },
+            "action_match": true,
+            "action_reward": 1.0,
+            "tool_type": "read"
+          },
+          {
+            "action": {
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+              "name": "get_user_details",
+              "arguments": {
+                "user_id": "fatima_johnson_7581"
+              },
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+            "action": {
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+              "requestor": "assistant",
+              "name": "get_order_details",
+              "arguments": {
+                "order_id": "#W5199551"
+              },
+              "info": null,
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+            },
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+            "tool_type": "read"
+          },
+          {
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+              "requestor": "assistant",
+              "name": "get_order_details",
+              "arguments": {
+                "order_id": "#W8665881"
+              },
+              "info": null,
+              "compare_args": null
+            },
+            "action_match": true,
+            "action_reward": 1.0,
+            "tool_type": "read"
+          },
+          {
+            "action": {
+              "action_id": "16_4",
+              "requestor": "assistant",
+              "name": "get_order_details",
+              "arguments": {
+                "order_id": "#W9389413"
+              },
+              "info": null,
+              "compare_args": null
+            },
+            "action_match": true,
+            "action_reward": 1.0,
+            "tool_type": "read"
+          },
+          {
+            "action": {
+              "action_id": "16_5",
+              "requestor": "assistant",
+              "name": "calculate",
+              "arguments": {
+                "expression": "3131.1 + 4777.75 + 367.38"
+              },
+              "info": null,
+              "compare_args": null
+            },
+            "action_match": false,
+            "action_reward": 0.0,
+            "tool_type": "generic"
+          },
+          {
+            "action": {
+              "action_id": "16_6",
+              "requestor": "assistant",
+              "name": "cancel_pending_order",
+              "arguments": {
+                "order_id": "#W5199551",
+                "reason": "no longer needed"
+              },
+              "info": null,
+              "compare_args": null
+            },
+            "action_match": true,
+            "action_reward": 1.0,
+            "tool_type": "write"
+          },
+          {
+            "action": {
+              "action_id": "16_7",
+              "requestor": "assistant",
+              "name": "cancel_pending_order",
+              "arguments": {
+                "order_id": "#W8665881",
+                "reason": "no longer needed"
+              },
+              "info": null,
+              "compare_args": null
+            },
+            "action_match": true,
+            "action_reward": 1.0,
+            "tool_type": "write"
+          },
+          {
+            "action": {
+              "action_id": "16_8",
+              "requestor": "assistant",
+              "name": "return_delivered_order_items",
+              "arguments": {
+                "order_id": "#W9389413",
+                "item_ids": [
+                  "2554056026"
+                ],
+                "payment_method_id": "paypal_5364164"
+              },
+              "info": null,
+              "compare_args": null
+            },
+            "action_match": true,
+            "action_reward": 1.0,
+            "tool_type": "write"
+          }
+        ],
+        "nl_assertions": [
+          {
+            "nl_assertion": "Agent should tell the user the total refund amount is $8,276.23.",
+            "met": true,
+            "justification": "The assistant explicitly told the customer the total refund amount was $8,276.23 both before taking action and again in the final summary after completing the cancellations and return request."
+          }
+        ],
+        "communicate_checks": null,
+        "reward_basis": [
+          "DB",
+          "NL_ASSERTION"
+        ],
+        "reward_breakdown": {
+          "DB": 1.0,
+          "NL_ASSERTION": 1.0
+        },
+        "info": {
+          "env": null,
+          "nl": null,
+          "communicate": null,
+          "action": null
+        }
+      },
+      "tool_steps": 8,
+      "wall_s": 77.032,
+      "authenticated_user_id": "fatima_johnson_7581"
+    }
+  ]
+}
\ No newline at end of file
diff --git a/evals/tau2_retail/artifacts/smoke/traces.json b/evals/tau2_retail/artifacts/smoke/traces.json
new file mode 100644
index 0000000..07ecd13
--- /dev/null
+++ b/evals/tau2_retail/artifacts/smoke/traces.json
@@ -0,0 +1,760 @@
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+              "attributes": [
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+                {
+                  "key": "gen_ai.tool.name",
+                  "value": {
+                    "stringValue": "get_user_details"
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+                },
+                {
+                  "key": "gen_ai.tool.call.arguments",
+                  "value": {
+                    "stringValue": "{\"user_id\": \"yusuf_rossi_9620\"}"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.call.result",
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+                {
+                  "key": "gen_ai.agent.name",
+                  "value": {
+                    "stringValue": "tau2-retail"
+                  }
+                },
+                {
+                  "key": "gen_ai.agent.id",
+                  "value": {
+                    "stringValue": "tau2-retail-0"
+                  }
+                },
+                {
+                  "key": "faultgate.scenario",
+                  "value": {
+                    "stringValue": "retail-0"
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+                },
+                {
+                  "key": "metadata.scenario",
+                  "value": {
+                    "stringValue": "retail-0"
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+                  "value": {
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+                  "value": {
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+                },
+                {
+                  "key": "faultgate.termination",
+                  "value": {
+                    "stringValue": "TerminationReason.USER_STOP"
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+                {
+                  "key": "enduser.id",
+                  "value": {
+                    "stringValue": "yusuf_rossi_9620"
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+                "message": ""
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+                {
+                  "key": "gen_ai.tool.name",
+                  "value": {
+                    "stringValue": "find_user_id_by_name_zip"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.call.arguments",
+                  "value": {
+                    "stringValue": "{\"first_name\": \"Fatima\", \"last_name\": \"Johnson\", \"zip\": \"78712\"}"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.call.result",
+                  "value": {
+                    "stringValue": "fatima_johnson_7581"
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+                  "value": {
+                    "stringValue": "get_user_details"
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+                  "value": {
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+                  "value": {
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+                {
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+                  "value": {
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+                {
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+                  "value": {
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+                  "value": {
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+                  "value": {
+                    "stringValue": "{\"item_ids\": [\"2554056026\"], \"order_id\": \"#W9389413\", \"payment_method_id\": \"paypal_5364164\"}"
+                  }
+                },
+                {
+                  "key": "gen_ai.tool.call.result",
+                  "value": {
+                    "stringValue": "{\"order_id\": \"#W9389413\", \"user_id\": \"fatima_johnson_7581\", \"address\": {\"address1\": \"123 Elm Street\", \"address2\": \"Suite 640\", \"city\": \"Austin\", \"country\": \"USA\", \"state\": \"TX\", \"zip\": \"78712\"}, \"items\": [{\"name\": \"Hiking Boots\", \"product_id\": \"7363354090\", \"item_id\": \"4127323219\", \"price\": 251.82, \"options\": {\"size\": \"10\", \"material\": \"synthetic\", \"waterproof\": \"no\"}}, {\"name\": \"Smart Watch\", \"product_id\": \"6945232052\", \"item_id\": \"2554056026\", \"price\": 367.38, \"options\": {\"color\": \"gold\", \"band material\": \"metal\", \"display\": \"AMOLED\"}}, {\"name\": \"Mechanical Keyboard\", \"product_id\": \"1656367028\", \"item_id\": \"6342039236\", \"price\": 244.91, \"options\": {\"switch type\": \"clicky\", \"backlight\": \"white\", \"size\": \"full size\"}}, {\"name\": \"T-Shirt\", \"product_id\": \"9523456873\", \"item_id\": \"5047954489\", \"price\": 54.84, \"options\": {\"color\": \"blue\", \"size\": \"S\", \"material\": \"polyester\", \"style\": \"v-neck\"}}], \"status\": \"return requested\", \"fulfillments\": [{\"tracking_id\": [\"967556659983\"], \"item_ids\": [\"4127323219\", \"2554056026\", \"6342039236\", \"5047954489\"]}], \"payment_history\": [{\"transaction_type\": \"payment\", \"amount\": 918.95, \"payment_method_id\": \"paypal_5364164\"}], \"cancel_reason\": null, \"exchange_items\": null, \"exchange_new_items\": null, \"exchange_payment_method_id\": null, \"exchange_price_difference\": null, \"return_items\": [\"2554056026\"], \"return_payment_method_id\": \"paypal_5364164\"}"
+                  }
+                }
+              ],
+              "status": {
+                "code": 0,
+                "message": ""
+              },
+              "parentSpanId": "d3ab6bca4368b4be"
+            },
+            {
+              "traceId": "5ff059f8900378f7eed85f1f2bb62c58",
+              "spanId": "d3ab6bca4368b4be",
+              "name": "invoke_agent",
+              "startTimeUnixNano": "1793306637977728200",
+              "endTimeUnixNano": "1793306715009894700",
+              "attributes": [
+                {
+                  "key": "gen_ai.operation.name",
+                  "value": {
+                    "stringValue": "invoke_agent"
+                  }
+                },
+                {
+                  "key": "gen_ai.agent.name",
+                  "value": {
+                    "stringValue": "tau2-retail"
+                  }
+                },
+                {
+                  "key": "gen_ai.agent.id",
+                  "value": {
+                    "stringValue": "tau2-retail-16"
+                  }
+                },
+                {
+                  "key": "faultgate.scenario",
+                  "value": {
+                    "stringValue": "retail-16"
+                  }
+                },
+                {
+                  "key": "metadata.scenario",
+                  "value": {
+                    "stringValue": "retail-16"
+                  }
+                },
+                {
+                  "key": "gen_ai.prompt",
+                  "value": {
+                    "stringValue": "You want to cancel all pending orders (since they are no longer needed) and return the watch you have received (but nothing else), and you want to know the total amount you can get back."
+                  }
+                },
+                {
+                  "key": "gen_ai.completion",
+                  "value": {
+                    "stringValue": "All done, Fatima! Here's a summary of what was completed:\n\n**Cancelled orders (reason: \"no longer needed\"):**\n- **#W5199551** \u2014 $3,131.10 refunded to PayPal (5\u20137 business days)\n- **#W8665881** \u2014 $4,777.75 refunded to PayPal (5\u20137 business days)\n\n**Return requested:**\n- **#W9389413** \u2014 Smart Watch (gold / metal band / AMOLED, $367.38) only. The Hiking Boots, Mechanical Keyboard, and T-Shirt from that order remain yours. Refund goes to your original PayPal (5\u20137 business days). You'll receive an email with instructions on how and where to return the watch.\n\n**Total amount you'll get back: $8,276.23**\n\nIs there anything else I can help you with?"
+                  }
+                },
+                {
+                  "key": "faultgate.termination",
+                  "value": {
+                    "stringValue": "TerminationReason.USER_STOP"
+                  }
+                },
+                {
+                  "key": "enduser.id",
+                  "value": {
+                    "stringValue": "fatima_johnson_7581"
+                  }
+                }
+              ],
+              "status": {
+                "code": 0,
+                "message": ""
+              }
+            }
+          ]
+        }
+      ]
+    }
+  ]
+}
\ No newline at end of file
diff --git a/evals/tau2_retail/compare.py b/evals/tau2_retail/compare.py
new file mode 100644
index 0000000..0364dd4
--- /dev/null
+++ b/evals/tau2_retail/compare.py
@@ -0,0 +1,61 @@
+#!/usr/bin/env python3
+"""Join a tau2 results file with a faultgate JSON report and list disagreements."""
+from __future__ import annotations
+
+import argparse
+import json
+from pathlib import Path
+
+
+def main() -> int:
+    p = argparse.ArgumentParser(description=__doc__)
+    p.add_argument("results", type=Path)
+    p.add_argument("report", type=Path)
+    p.add_argument("--json", type=Path, help="also write the joined rows here")
+    args = p.parse_args()
+
+    results = json.loads(args.results.read_text(encoding="utf-8"))
+    report = json.loads(args.report.read_text(encoding="utf-8"))
+    fired: dict[str, list[dict]] = {}
+    for item in report.get("results", []):
+        if item.get("detected"):
+            fired.setdefault(item["scenario"], []).append(item)
+
+    rows = []
+    for task in results["tasks"]:
+        scenario = f"retail-{task['task_id']}"
+        checks = fired.get(scenario, [])
+        tau2_pass = task.get("reward") == 1.0
+        faultgate_pass = not checks
+        rows.append({
+            "task_id": task["task_id"],
+            "tau2_reward": task.get("reward"),
+            "tau2_pass": tau2_pass,
+            "faultgate_pass": faultgate_pass,
+            "fired": [{"check": c["check"], "reason": c["reason"]} for c in checks],
+        })
+
+    print(f"{'task':>4}  {'tau2':>5}  {'faultgate':>9}  checks")
+    for row in rows:
+        checks = ", ".join(c["check"] for c in row["fired"]) or "-"
+        print(f"{row['task_id']:>4}  {str(row['tau2_reward']):>5}  "
+              f"{'pass' if row['faultgate_pass'] else 'FAIL':>9}  {checks}")
+
+    false_positives = [r for r in rows if r["tau2_pass"] and not r["faultgate_pass"]]
+    misses = [r for r in rows if not r["tau2_pass"] and r["faultgate_pass"]]
+    print(f"\nagreement: {len(rows) - len(false_positives) - len(misses)}/{len(rows)}")
+    print(f"tau2 pass / faultgate fail (false positive or process-only): {len(false_positives)}")
+    for row in false_positives:
+        print(f"  task {row['task_id']}: " + "; ".join(
+            f"{c['check']}: {c['reason']}" for c in row["fired"]))
+    print(f"tau2 fail / faultgate pass (outside its checks): {len(misses)}")
+    for row in misses:
+        print(f"  task {row['task_id']}: reward={row['tau2_reward']}")
+
+    if args.json:
+        args.json.write_text(json.dumps(rows, indent=2), encoding="utf-8")
+    return 0
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())
diff --git a/evals/tau2_retail/run.py b/evals/tau2_retail/run.py
new file mode 100644
index 0000000..c5eb3ec
--- /dev/null
+++ b/evals/tau2_retail/run.py
@@ -0,0 +1,291 @@
+#!/usr/bin/env python3
+"""Run selected tau2-bench retail tasks and export OTLP/JSON traces.
+
+The exporter writes the GenAI semantic-convention attributes faultgate reads:
+one root ``invoke_agent`` span per task, one ``execute_tool`` child per tool
+call.  Credentials are injected only at the LiteLLM transport boundary and are
+never written to the output directory.
+"""
+from __future__ import annotations
+
+import argparse
+import json
+import os
+import subprocess
+import sys
+import time
+from pathlib import Path
+from typing import Any
+
+
+PINNED_COMMIT = "7aad81c37a3a78b4ed3e4866769f851400c64415"
+
+
+def parse_args() -> argparse.Namespace:
+    p = argparse.ArgumentParser(description=__doc__)
+    p.add_argument("--tau2-dir", required=True, type=Path, help="tau2-bench checkout")
+    p.add_argument("--out-dir", required=True, type=Path, help="where traces/results are written")
+    p.add_argument("--task-ids", default="0,16", help="comma-separated retail task ids")
+    p.add_argument("--model", default=None)
+    p.add_argument("--user-model", default=None, help="defaults to --model")
+    p.add_argument("--api-base", default=None)
+    p.add_argument("--api-key", default=None)
+    p.add_argument("--extra-headers", default=None,
+                   help='JSON object, e.g. {"x-opencode-session":"..."}')
+    p.add_argument("--max-steps", type=int, default=80)
+    p.add_argument("--timeout", type=float, default=600)
+    p.add_argument("--seed", type=int, default=300)
+    p.add_argument("--expected-commit", default=PINNED_COMMIT,
+                   help="refuse to run against another tau2 commit; empty disables")
+    p.add_argument("--allow-other-commit", action="store_true")
+    return p.parse_args()
+
+
+def load_dotenv(tau2_dir: Path) -> None:
+    """Load LLM_* / OPENAI_* keys from the checkout's .env without overriding."""
+    try:
+        from dotenv import dotenv_values
+    except ImportError:
+        return
+    env_file = tau2_dir / ".env"
+    if not env_file.exists():
+        return
+    for key, value in dotenv_values(env_file).items():
+        if value and key not in os.environ:
+            os.environ[key] = value
+
+
+def main() -> int:
+    args = parse_args()
+    tau2_dir = args.tau2_dir.resolve()
+    out_dir = args.out_dir.resolve()
+    out_dir.mkdir(parents=True, exist_ok=True)
+    sys.path.insert(0, str(tau2_dir / "src"))
+    load_dotenv(tau2_dir)
+
+    model = args.model or os.environ.get("LLM_MODEL") or "openai/gpt-4.1-nano"
+    user_model = args.user_model or model
+    api_base = args.api_base or os.environ.get("LLM_API_BASE") or os.environ.get("OPENAI_API_BASE")
+    api_key = args.api_key or os.environ.get("LLM_API_KEY") or os.environ.get("OPENAI_API_KEY")
+    extra_headers = args.extra_headers or os.environ.get("LLM_EXTRA_HEADERS", "")
+    if not api_key or not api_base:
+        print("set LLM_API_KEY and LLM_API_BASE (or pass --api-key/--api-base)", file=sys.stderr)
+        return 2
+    headers = json.loads(extra_headers) if extra_headers else {}
+
+    # Imported after the path is fixed so the pinned checkout wins.
+    import litellm
+    from loguru import logger
+    logger.remove()
+
+    from opentelemetry import trace
+    from opentelemetry.sdk.trace import TracerProvider
+    from opentelemetry.sdk.trace.export import SimpleSpanProcessor, SpanExporter, SpanExportResult
+
+    import tau2.config as tau2_config
+    import tau2.evaluator.evaluator_nl_assertions as nl_eval
+    import tau2.utils.llm_utils as llm_utils
+    from tau2.environment.environment import Environment
+    from tau2.orchestrator.orchestrator import Orchestrator
+    from tau2.runner.build import build_agent, build_environment, build_user
+    from tau2.runner.helpers import load_tasks
+    from tau2.runner.simulation import run_simulation
+
+    nl_eval.DEFAULT_LLM_NL_ASSERTIONS = model
+    tau2_config.DEFAULT_LLM_NL_ASSERTIONS = model
+
+    ledger: dict[str, Any] = {"calls": 0, "prompt_tokens": 0, "completion_tokens": 0, "models": {}}
+    original_completion = llm_utils.completion
+
+    def tracked_completion(*call_args: Any, **kwargs: Any) -> Any:
+        kwargs.setdefault("api_base", api_base)
+        kwargs.setdefault("api_key", api_key)
+        kwargs["num_retries"] = 0
+        kwargs.setdefault("timeout", args.timeout)
+        if headers:
+            kwargs.setdefault("extra_headers", headers)
+        response = original_completion(*call_args, **kwargs)
+        usage = getattr(response, "usage", None)
+        with_tokens = int(getattr(usage, "prompt_tokens", 0) or 0)
+        out_tokens = int(getattr(usage, "completion_tokens", 0) or 0)
+        ledger["calls"] += 1
+        ledger["prompt_tokens"] += with_tokens
+        ledger["completion_tokens"] += out_tokens
+        name = str(kwargs.get("model", "unknown"))
+        ledger["models"][name] = ledger["models"].get(name, 0) + 1
+        cost = getattr(response, "_hidden_params", {}).get("response_cost")
+        if isinstance(cost, (int, float)):
+            ledger["response_cost_usd"] = round(ledger.get("response_cost_usd", 0.0) + float(cost), 6)
+        return response
+
+    llm_utils.completion = tracked_completion
+    llm_utils.get_response_cost = lambda response: 0.0  # tracked above; unpriced proxy models are common
+    litellm.suppress_debug_info = True
+
+    class MemoryExporter(SpanExporter):
+        def __init__(self) -> None:
+            self.spans: list[Any] = []
+
+        def export(self, spans: Any) -> SpanExportResult:
+            self.spans.extend(spans)
+            return SpanExportResult.SUCCESS
+
+        def shutdown(self) -> None:
+            pass
+
+    exporter = MemoryExporter()
+    provider = TracerProvider()
+    provider.add_span_processor(SimpleSpanProcessor(exporter))
+    trace.set_tracer_provider(provider)
+    tracer = trace.get_tracer("faultgate-tau2-retail")
+
+    # Capture the authenticated customer id from tau2's own lookup result.  A
+    # policy identity rule reads it from the root span.
+    state: dict[str, Any] = {"user_id": None, "env": None}
+    original_get_response = Environment.get_response
+
+    def instrumented_tool(self: Environment, message: Any) -> Any:
+        # Evaluation replays the trajectory on a fresh environment; only the
+        # live run's environment belongs in the trace.
+        if self is not state.get("env"):
+            return original_get_response(self, message)
+        with tracer.start_as_current_span("execute_tool") as span:
+            span.set_attribute("gen_ai.operation.name", "execute_tool")
+            span.set_attribute("gen_ai.tool.name", message.name)
+            span.set_attribute("gen_ai.tool.call.arguments", json.dumps(message.arguments))
+            result = original_get_response(self, message)
+            span.set_attribute("gen_ai.tool.call.result", result.content or "")
+            if result.error:
+                span.set_attribute("error.type", "ToolError")
+                span.set_status(trace.Status(trace.StatusCode.ERROR, "ToolError"))
+            elif message.name.startswith("find_user_id_by"):
+                raw = (result.content or "").strip()
+                try:
+                    value = json.loads(raw)
+                except (TypeError, ValueError):
+                    value = raw.strip('"')
+                if isinstance(value, str) and value:
+                    state["user_id"] = value
+            return result
+
+    Environment.get_response = instrumented_tool
+
+    def attr_value(value: Any) -> str:
+        return value if isinstance(value, str) else json.dumps(value, default=str)
+
+    def to_otlp(spans: list[Any]) -> dict[str, Any]:
+        out = []
+        for span in spans:
+            item: dict[str, Any] = {
+                "traceId": format(span.context.trace_id, "032x"),
+                "spanId": format(span.context.span_id, "016x"),
+                "name": span.name,
+                "startTimeUnixNano": str(span.start_time),
+                "endTimeUnixNano": str(span.end_time),
+                "attributes": [
+                    {"key": key, "value": {"stringValue": attr_value(value)}}
+                    for key, value in (span.attributes or {}).items()
+                ],
+                "status": {
+                    "code": 2 if span.status.status_code.name == "ERROR" else 0,
+                    "message": span.status.description or "",
+                },
+            }
+            if span.parent is not None:
+                item["parentSpanId"] = format(span.parent.span_id, "016x")
+            out.append(item)
+        return {"resourceSpans": [{"scopeSpans": [{"spans": out}]}]}
+
+    tasks = load_tasks("retail", "base")
+    wanted = [task_id.strip() for task_id in args.task_ids.split(",") if task_id.strip()]
+    by_id = {task.id: task for task in tasks}
+    missing = [task_id for task_id in wanted if task_id not in by_id]
+    if missing:
+        print(f"unknown retail task ids: {missing}", file=sys.stderr)
+        return 2
+    selected = [by_id[task_id] for task_id in wanted]
+
+    commit = subprocess.check_output(
+        ["git", "-C", str(tau2_dir), "rev-parse", "HEAD"], text=True
+    ).strip()
+    if args.expected_commit and commit != args.expected_commit and not args.allow_other_commit:
+        print(f"tau2 checkout is {commit}; expected {args.expected_commit} "
+              "(pass --allow-other-commit to override)", file=sys.stderr)
+        return 2
+    started = time.time()
+    all_spans: list[Any] = []
+    results: list[dict[str, Any]] = []
+    trace_file = out_dir / "traces.json"
+
+    for index, task in enumerate(selected, 1):
+        exporter.spans = []
+        state["user_id"] = None
+        env = build_environment("retail")
+        state["env"] = env
+        agent = build_agent("llm_agent", env, llm=model, llm_args={"num_retries": 0})
+        user = build_user("user_simulator", env, task, llm=user_model, llm_args={"num_retries": 0})
+        orchestrator = Orchestrator(
+            domain="retail", agent=agent, user=user, environment=env, task=task,
+            max_steps=args.max_steps, max_errors=10, seed=args.seed, timeout=args.timeout,
+        )
+        row: dict[str, Any] = {"task_id": task.id, "purpose": task.user_scenario.instructions.reason_for_call}
+        started_task = time.time()
+        with tracer.start_as_current_span("invoke_agent") as root:
+            root.set_attribute("gen_ai.operation.name", "invoke_agent")
+            root.set_attribute("gen_ai.agent.name", "tau2-retail")
+            root.set_attribute("gen_ai.agent.id", f"tau2-retail-{task.id}")
+            root.set_attribute("faultgate.scenario", f"retail-{task.id}")
+            root.set_attribute("metadata.scenario", f"retail-{task.id}")
+            root.set_attribute("gen_ai.prompt", task.user_scenario.instructions.reason_for_call)
+            try:
+                simulation = run_simulation(orchestrator)
+                messages = simulation.get_messages()
+                answers = [m.content for m in messages if m.role == "assistant" and m.content]
+                answer = answers[-1] if answers else ""
+                root.set_attribute("gen_ai.completion", answer)
+                root.set_attribute("faultgate.termination", str(simulation.termination_reason))
+                if state["user_id"]:
+                    root.set_attribute("enduser.id", state["user_id"])
+                reward_info = simulation.reward_info
+                row.update({
+                    "reward": reward_info.reward if reward_info else None,
+                    "termination_reason": str(simulation.termination_reason),
+                    "duration_s": round(simulation.duration, 3),
+                    "answer": answer,
+                    "reward_info": reward_info.model_dump(mode="json") if reward_info else None,
+                })
+                (out_dir / f"task-{task.id}.simulation.json").write_text(
+                    simulation.model_dump_json(indent=2), encoding="utf-8"
+                )
+                print(f"[{index}/{len(selected)}] task {task.id} reward={row['reward']} "
+                      f"termination={row['termination_reason']}", flush=True)
+            except Exception as exc:  # keep the other task and the trace
+                root.set_status(trace.Status(trace.StatusCode.ERROR, type(exc).__name__))
+                root.set_attribute("faultgate.termination", f"agent error: {type(exc).__name__}")
+                row.update({"reward": None, "error": type(exc).__name__})
+                print(f"[{index}/{len(selected)}] task {task.id} FAILED {type(exc).__name__}", flush=True)
+        row["tool_steps"] = sum(1 for span in exporter.spans if span.name == "execute_tool")
+        row["wall_s"] = round(time.time() - started_task, 3)
+        row["authenticated_user_id"] = state["user_id"]
+        results.append(row)
+        all_spans.extend(exporter.spans)
+        trace_file.write_text(json.dumps(to_otlp(all_spans), indent=2), encoding="utf-8")
+
+    report = {
+        "tau2_commit": commit,
+        "model": model,
+        "user_model": user_model,
+        "task_ids": wanted,
+        "generated_at": time.strftime("%Y-%m-%dT%H:%M:%SZ", time.gmtime()),
+        "wall_s": round(time.time() - started, 3),
+        "tasks": results,
+    }
+    (out_dir / "results.json").write_text(json.dumps(report, indent=2), encoding="utf-8")
+    (out_dir / "cost.json").write_text(json.dumps(ledger, indent=2), encoding="utf-8")
+    print(f"wrote {trace_file} ({len(all_spans)} spans), results.json, cost.json", flush=True)
+    provider.shutdown()
+    return 0
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())