# Code Audit: Full Codebase
Date: 2026-03-09
Reviewer: AI Agent (fresh context)

## Summary
- **Files reviewed:** 48 source files across 5 crates (`pathfinder`, `pathfinder-common`, `pathfinder-lsp`, `pathfinder-search`, `pathfinder-treesitter`)
- **Issues found:** 3 (0 critical, 0 major, 2 minor, 1 nit) — **all resolved**
- **Test coverage:** 264 tests, all passing

## Critical Issues
None.

## Major Issues
None.

## Minor Issues
- [x] **[OBS]** `delete_symbol_impl` is missing the `tracing::info!(... "start")` log — All 5 other edit tools (`replace_body`, `replace_full`, `insert_before`, `insert_after`, `validate_only`) emit a structured `"<tool_name>: start"` log at entry. `delete_symbol_impl` (line 436) proceeds directly to semantic path parsing without the start log. The start log provides valuable latency attribution and is part of the 3-point operation logging contract (start/complete/fail). **Fixed:** added `tracing::info!` start log. — [edit.rs:436](file:///home/irahardianto/works/projects/pathfinder/crates/pathfinder/src/server/tools/edit.rs#L436)

- [x] **[OBS]** 4 of 6 edit tools silently return sandbox denial errors without `tracing::warn!` — `replace_body_impl` (line 94) and `replace_full_impl` (line 186) both emit a `tracing::warn!` with `tool`, `semantic_path`, and `error` fields before returning `Err` on sandbox check failure. However, `insert_before_impl`, `insert_after_impl`, `delete_symbol_impl`, and `validate_only_impl` all return the error *without* logging. **Fixed:** added `tracing::warn!` with structured fields to all 4 tools. — [edit.rs](file:///home/irahardianto/works/projects/pathfinder/crates/pathfinder/src/server/tools/edit.rs)

## Nit
- [x] **[PAT]** Non-test `#[allow(clippy::unused_async)]` and `#[allow(dead_code)]` in `navigation.rs` should use `#[expect]` with a `reason` — Per the Rust idiom conventions established during the `too_many_lines` cleanup, justified lint suppressions in production code should use `#[expect(lint, reason = "...")]` instead of bare `#[allow]`. **Fixed:** converted both to `#[expect]` with descriptive reason strings. — [navigation.rs:255](file:///home/irahardianto/works/projects/pathfinder/crates/pathfinder/src/server/tools/navigation.rs#L255), [navigation.rs:320](file:///home/irahardianto/works/projects/pathfinder/crates/pathfinder/src/server/tools/navigation.rs#L320)

## Verification Results
- Lint: **PASS** (`cargo clippy --workspace --all-targets` — 0 warnings)
- Tests: **PASS** (264 passed, 0 failed)
- Build: **PASS**
- Fmt: **PASS** (`cargo fmt --all --check` — clean)
- Post-fix re-verification: **PASS** (all checks green after fixes applied)

## Recommended Fix Workflows

| Finding | Type                    | Workflow              |
| ------- | ----------------------- | --------------------- |
| Minor 1 | Missing start log       | `/quick-fix`          |
| Minor 2 | Missing sandbox logs    | `/quick-fix`          |
| Nit     | `allow` → `expect`     | Fix directly in-place |

## Rules Applied
- Logging and Observability Mandate (3-point operation logging contract)
- Rust Idioms and Patterns (`#[expect]` over bare `#[allow]` with `reason`)
- Security Mandate (sandbox checks — all tools verified present)
- Error Handling Principles (graceful degradation — verified on all LSP paths)
- Architectural Patterns (Lawyer/Surgeon/Scout traits — I/O behind interfaces, verified)
- Resources and Memory Management (LSP `did_close` — verified on all 5 code paths)
- Testing Strategy (264 tests, full coverage on critical paths)
- Code Organization Principles (function sizes, pattern consistency)
