[vitali87]

Summary

• Adds move, the T12 edit operation of the Epic: CGR as an IDE for AI agents + a graph-native edit algebra #1521 edit algebra, as cgr move QN TARGET [--keep-alias] [--dry-run] and as the move MCP tool. It cuts a module-level function or class, with its decorators, docstring and adjacent comments, into the target module. It carries the imports the moved code needs, including old-module names such as a constant it reads, and rewrites every importer the graph knows. It refuses a move that would create an import cycle. The whole move is one edit transaction, held to the postcondition contract, and undone by its own transaction id when the contract fails.
• This rebuilds the old feat: move edit operation with importer rewriting and cycle refusal (#1534) #1549 split (feat: parse move spans and imports #2070 to feat: retarget move imports safely #2080) and its review fixes (fix/move-threads) onto current main. It is stacked on the change_signature stack (feat(signature): contract expectation, shared call-site helpers and constants for change_signature (#1533, 1/9) #2163 to test(signature): hierarchy, receiver and default guards for change_signature (#1533, 9/9) #2167), which the old code was built on.
• Adapted to main:
  • The definitions read passes longer_project_prefixes.
  • The MCP handler builds its re-ingest the way change_signature does, and releases the mid-update mark when the move is refused before re-ingesting.
  • A failed measure, or a failed re-ingest after a rollback, now reports graph_incomplete instead of raising. The MCP handler records it durably.
  • move is not re-exported from codebase_rag.editing, so cgr --version still loads no parsers.
• Bug found while recording the demo, fixed here: moving the last function out of a module that also binds TAX_RATE = 0.2 used to roll back. The graph has no node for a constant, so move_expectation can pass while an importer still targets the old module #1825's stale-importer check treated the old module as empty and flagged the moved function's own from shop.util import TAX_RATE. The module-import snapshot now carries each import's imported_name. An import that names only things that did not move is not stale; a whole-module import, or one with no recorded name, still is.

Demo

A real terminal session against Memgraph 3.3 on a three-file shop package, first on main and then on this branch:

• main: cgr move is No such command 'move'.
• this branch: the dry run reports 2 importers to rewrite. The move applies 4 files and passes its contract. shop/pricing.py holds the function plus from shop.util import TAX_RATE, both importers now import from shop.pricing, and the program still prints 18.0.

Type of Change

• Bug fix
• New feature
• Performance improvement
• Refactoring (no functional changes)
• Documentation
• CI/CD or tooling
• Dependencies

Related Issues

Closes #1534. Part of #1521. Stacked on #2167 (change_signature 9/9). Supersedes #1549 and its split #2070 to #2080.

Test Plan

• Unit tests pass (uv run pytest -n auto -m "not integration"): I ran the full suite locally. 15,967 passed and 93 failed. The failures are tests that download the tiktoken encoding or reach a provider, and this sandbox's proxy blocks those downloads. The same tests fail on the base branch here. CI runs the suite with network access.
• New tests added: test_move_op, test_move_safety, test_move_cli, test_move_mcp, test_move_helpers_review, test_move_import_presence and test_variadic_header_detection. The constant regression test is test_moving_the_last_function_beside_a_module_constant_passes_its_contract: it fails on this branch's previous commit and passes on this one. Its negative partner, test_an_importer_left_on_the_vacated_module_still_fails_the_contract, shows that a real stale importer still rolls the move back.
• Integration tests pass (make test-integration, requires Docker)
• Manual testing (the demo above, against a real Memgraph 3.3)

Also green: test_edit_contract, test_structural_delta*, test_rename*, test_cli_startup_imports and test_generated_docs_are_current (the CLI reference is regenerated). ruff check, ruff format and ty check are clean.

Checklist

• PR title follows Conventional Commits format
• All pre-commit checks pass (make pre-commit): ruff, format and ty pass; the full unit-test step runs in CI.
• No hardcoded strings in non-config/non-constants files
• No # type: ignore, cast(), Any, or object type hints
• New comments and docstrings explain why, not what (see Comment Policy)

Summary by CodeRabbit

• New Features
  • Added move to the CLI and MCP tools for relocating a module-level function or class to another module.
  • Moves update importers and module-qualified uses, carry required imports, and can optionally retain the old import path as an alias.
  • Dry runs preview a move without changing files. Moves that could create import cycles or cannot be applied safely are refused.
  • Applied moves are checked for parsing and consistency; changes may be rolled back if verification fails.
• Documentation
  • Added guidance for the move command and MCP tool.

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Walkthrough

Adds an operation to move module-level Python, JavaScript, and TypeScript definitions. It plans import and call-site changes, checks for new cycles, and applies edits with transactional verification. CLI and MCP interfaces provide dry-run and alias options.

Changes: Symbol move operation

Layer / File(s)	Summary
Import graph and verification inputs codebase_rag/cypher_queries.py, evals/cgr_graph.py, codebase_rag/structural_delta.py, codebase_rag/editing/contract.py, codebase_rag/tests/test_edit_contract.py, codebase_rag/constants/graph.py	Graph queries and snapshots now include imported names. Stale-importer detection checks whether imports can still reach moved names. Contract measurement accepts explicitly reshaped rename pairs.
Definition and import analysis codebase_rag/editing/move.py, codebase_rag/constants/ast_nodes.py, codebase_rag/tests/test_move_helpers_review.py, codebase_rag/tests/test_move_import_presence.py	Adds move result types and helpers for binding analysis, syntax spans, import narrowing, and relative-path rebasing. Tests cover import bindings, path changes, and insertion positions.
Move planning and transactional application codebase_rag/editing/move.py, codebase_rag/tests/test_move_op.py, codebase_rag/tests/test_move_preservation.py, codebase_rag/tests/test_move_safety.py	Planning checks definitions, dependencies, collisions, and new cycles, then builds destination, importer, and call-site edits. Application stages and parses edits, commits a transaction, and verifies the graph contract. Failed verification triggers an attempt to roll back the move’s transaction.
CLI and MCP interfaces codebase_rag/cli.py, codebase_rag/cli_help.py, codebase_rag/constants/cli.py, codebase_rag/constants/mcp.py, codebase_rag/mcp/tools.py, codebase_rag/tools/tool_descriptions.py, codebase_rag/tests/test_move_cli.py, codebase_rag/tests/test_move_mcp.py, docs/architecture/move.md, docs/guide/cli-reference.md, docs/guide/mcp-server.md, mkdocs.yml	Registers the move command and MCP tool with dry-run and alias options. The interfaces check the indexed project root and report refusal or application results. Documentation describes the operation and its contract.

Variadic header detection

Layer / File(s)	Summary
Parse function headers for variadic parameters codebase_rag/structural_delta.py, codebase_rag/tests/test_variadic_header_detection.py	Variadic detection now parses Python function headers with AST and tokenization. Tests cover multiline headers, nested expressions, comments, and strings.

Priority: Normal

Estimated code review effort: 4 (Complex) | ~75 minutes

Change: Feature

Sequence Diagram(s)

sequenceDiagram
  participant CLI
  participant MCP
  participant move
  participant Mover
  participant Patcher
  participant Reingest
  CLI->>move: qualified name and target module
  MCP->>move: qualified name and target module
  move->>Mover: plan or apply move
  Mover->>Patcher: stage and parse planned edits
  Patcher-->>Mover: staged edit results
  Mover->>Reingest: verify committed graph contract
  Reingest-->>Mover: contract result

Loading

Possibly related PRs

• vitali87/code-graph-rag#2079: Adds tests for the same MCP move tool schema, refusal response, and successful response.
• vitali87/code-graph-rag#2077: Implements and documents the same graph-aware move operation, including CLI, editing, cycle checks, importer rewrites, and transaction handling.

Suggested reviewers: claude

Merge Risk: Moderate · previous review c4eff

The new cgr move command can leave the code graph partially updated without marking it, unlike the MCP tool. Later commands could then use stale graph data. Mark the graph incomplete in the CLI path, or accept this gap explicitly, before merging.

Pre-merge checks: 4

Check name	Status	Explanation
Title check		The title clearly identifies the main change: adding a graph-aware move operation for module-level definitions. It is concise and follows Conventional Commits format.
Description check		The description includes the required summary, demo, change type, related issues, test plan, and checklist. It also documents the reported test failures and unrun integration tests.
Linked Issues check		Active issue #1534 has coding requirements. The PR adds move(qn, target_module) through the editing API, CLI, and MCP tool. The reported implementation moves module-level definitions with decorators…
Out of Scope Changes check		The changed implementation, graph import metadata, CLI and MCP interfaces, contract support, documentation, and regression tests directly support issue #1534. The Python, JavaScript, and TypeScript pr…

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[vitali87]

github-advanced-security (Code scanning AI findings) failed on 5966a1e before it reviewed anything: the Copilot code-scanning agent returned 402 You have exceeded your monthly quota. That is the account's Copilot quota, not this diff, and no code change can fix it. It will pass once the quota resets or more is added.

[greptile-apps]

Confidence Score: 4/5

[Medium impact] Adds a new refactoring operation to move module-level definitions.

Changes are needed before merging: a successful move can break functions that generate annotated Python code while still passing its contract.

Findings

1.  Generated annotations break after moving ▶

T-Rex evidence

Executable dynamic exec move reproduction

• This executed script creates a temporary package, performs the real move with the existing graph harness, and asserts the before/after runtime difference, confirming the defect.

Importer call before moving the function

• A fresh Python process calls the original function through its importer and returns the postponed annotation string, showing the program works before the move.

Importer call after the successful move

• The identical subprocess call runs after the real move and passing contract, then raises NameError inside exec, showing the successful refactor broke runtime behavior.

Complete reproduction command and observed output

• The reproduction command captures source files, move results, both subprocess outputs, and passing reproduction assertions, confirming the candidate on the supplied head.

Exact head and unchanged tracked source verification

• Git and numbered source commands verify the requested commit, a clean tracked diff, and the relevant future-import filtering lines, tying the defect to the exact candidate.

Initial run with a stale Python interpreter link

• The initial reproduction attempt could not start the setup environment's missing interpreter, recording an environment issue that was subsequently resolved.

Python environment restoration

• Installing Python 3.12 and syncing frozen test dependencies replaces the stale interpreter environment successfully, enabling runtime validation without tracked manifest changes.

Evidence from the check

• This executed script creates a temporary package, performs the real move with the existing graph harness, and asserts the before/after runtime difference, confirming the defect.

Command output from the check

• A fresh Python process calls the original function through its importer and returns the postponed annotation string, showing the program works before the move.

Command output from the check

• The identical subprocess call runs after the real move and passing contract, then raises NameError inside exec, showing the successful refactor broke runtime behavior.

Command output from the check

• The reproduction command captures source files, move results, both subprocess outputs, and passing reproduction assertions, confirming the candidate on the supplied head.

Command output from the check

• Git and numbered source commands verify the requested commit, a clean tracked diff, and the relevant future-import filtering lines, tying the defect to the exact candidate.

Command output from the check

• The initial reproduction attempt could not start the setup environment's missing interpreter, recording an environment issue that was subsequently resolved.

Command output from the check

• Installing Python 3.12 and syncing frozen test dependencies replaces the stale interpreter environment successfully, enabling runtime validation without tracked manifest changes.

Summary

Adds move through the CLI and MCP. It carries needed imports, rewrites importers, checks for cycles, and records the changes in one transaction.

• The latest fixes refuse unsupported star-import dependencies and preserve complete multiline function headers.
• Static annotation mismatches are now refused before writing.
• One remaining issue in codebase_rag/editing/move.py drops future settings needed by dynamically built Python code. A real move applied three files and passed its contract, but the same caller then raised NameError. This must be fixed before merging.
• The supplied previous threads are unnumbered. Their reported examples are addressed by the current code; none was reposted.

_{Reviews (4) · Last reviewed commit: "fix(move): refuse star-provided names an..." · Reviewed by Greptile}

[vitali87]

All 6 Greptile findings are addressed in 1ecd20a..6bcd873. Each one has a regression test in test_move_preservation.py that runs the moved code: Python in a subprocess, JS with node. 16 of the new tests fail on fcf1d12, and all of them pass now.

Finding	Outcome	Commit
Copied imports replace existing names	Refused. Every name the move adds (the moved name, copied imports, imports back from the old module) is checked against what the destination already binds. Binding a name to the same thing again does not count as a conflict.	86417ac
Moved functions lose constants	A name bound on every path through module-level if/try travels with the function. Refused when some path may leave it unbound.	f85ce37
Optional imports become required	Imports inside the moved definition stay where they are. Only the old module's top-level imports are copied.	f85ce37
Old exports stop working	With keep_alias and continued use, the old JS module both imports and re-exports the name.	f72f852
Moved exports disappear	A separate export { helper } follows the definition to the destination and is removed from the old list unless keep_alias is set.	f72f852
Concurrent edits get erased	Refused. Each file's starting contents are compared with what planning read (absent for a new destination). On a mismatch the move rolls back.	1ecd20a

Two related fixes:

• _cut_span deleted JS code that shared a line with the moved definition. It now cuts only the definition's own bytes (eebcb9c).
• Imports under if TYPE_CHECKING: are carried under the same guard instead of being copied unconditionally (6bcd873).

[vitali87]

@greptile review

[vitali87]

Greptile's second review (on 6bcd873) found four more cases where a move applied and passed its contract but changed behavior. All four are fixed on 7dce072, each with a test that runs the program before and after the move; 17 of the 23 new tests in test_move_preservation.py fail on 6bcd873 (the other 6 check that a correct move still applies).

Thread	Fix
Shared state splits apart	8fd3143: refuses (MOVE_SPLIT_GLOBAL) when the moved code rebinds a name through global that the rest of the old module binds or reads, and when it reads a global the old module keeps rebinding. JS/TS refuses (MOVE_ASSIGNS_IMPORT) when the moved definition writes a name it would import from the old module. A global only the moved code creates and uses still moves.
Local imports change their target	a59a933: each relative import inside the moved definition is resolved from the old file's package and respelled for the destination, staying in its function: relative when both files share a package, absolute otherwise. One that climbs above the top-level package refuses (MOVE_RELATIVE_IMPORT_ESCAPES). The contract accepts the respelled definition as the same symbol only for the pair the move declares it rewrote.
Unrelated code gets deleted	1eb47a0: a sole export { helper }; sharing its line with other code now loses only its own bytes, through the same _own_span that _cut_span uses.
Wildcard exports lose the helper	007fe1c: the planner refuses (MOVE_WILDCARD_IMPORTER, naming the importers and suggesting keep_alias) when a * importer of the old module would stop reaching the moved name, unless the old module imports it back or the star never carried it (a private name, or one outside a literal __all__). structural_delta also counts a wildcard importer of an emptied module as stale, so the contract rolls such a move back.

The branch also merges the latest main (through the updated signature stack); main's named-import checks from #2516 and the move's own import tracking both stay, and all their tests pass.

[vitali87]

@greptile review

[vitali87]

@greptile review

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Actionable comments posted: 1

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Inline comments:
Review comments at @codebase_rag/structural_delta.py:
- Around line 2197-2204: Update the import-staleness check in _imports_what_left
so an import whose bound name matches the target module’s final dotted component
remains stale when that module is vacated. Preserve the existing wildcard and
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• codebase_rag/editing/contract.py
• codebase_rag/editing/move.py
• codebase_rag/mcp/tools.py
• codebase_rag/structural_delta.py
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• codebase_rag/tests/test_variadic_header_detection.py
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Review comments at @codebase_rag/editing/move.py:
- Around line 533-535: Update the attribute check in _has_annotations so it
detects names in _PY_DYNAMIC_CODE only when the attribute is accessed through
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Review comments at @codebase_rag/cli.py:
- Line 2274: Replace the direct updater.reingest callback in the CLI move flow
with a guarded callback that durably marks the graph incomplete if re-ingestion
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• codebase_rag/cypher_queries.py
• codebase_rag/editing/contract.py
• codebase_rag/mcp/tools.py
• codebase_rag/structural_delta.py
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[sonarqubecloud]

Quality Gate passed

Issues
5 New issues
0 Accepted issues

Measures
0 Security Hotspots
91.4% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud