# Code Audit: pathfinder-common
Date: 2026-04-03

## Summary
- **Files reviewed:** 10
- **Issues found:** 4 (1 critical, 2 major, 1 minor)
- **Test coverage:** ~90% (8/9 source files tested, `git.rs` uncovered)
- **Dimensions activated:** C, D, E (A, B, F skipped)

## Critical Issues
Issues that must be fixed before deployment.
- [x] Compilation failure in `git.rs` due to missing `process` feature in the `tokio` dependency. This prevents the entire crate from compiling. — `crates/pathfinder-common/Cargo.toml`:`15`

## Major Issues
Issues that should be fixed in the near term.
- [x] No timeouts on external system calls. `get_changed_files_since` executes `git diff` via `tokio::process::Command` with no timeout, which risks hanging the system if `git` blocks. — `crates/pathfinder-common/src/git.rs`:`13`
- [x] Zero unit test coverage and missing I/O isolation in `git.rs`. The Git execution is not abstracted behind a trait interface, making it untestable without a real git repository, violating the Testability-First architectural pattern. — `crates/pathfinder-common/src/git.rs`:`9`

## Minor Issues
Style, naming, or minor improvements.
- [x] Missing telemetry/logging on operation entry point. `get_changed_files_since` does not log entry ("operation start"), success, or detailed error context, violating the Logging & Observability mandate. — `crates/pathfinder-common/src/git.rs`:`9`

## Verification Results
- Lint: PASS (`cargo clippy -p pathfinder-common --tests -- -D warnings` — 0 warnings)
- Tests: PASS (86 unit tests pass, 5 new `git::tests::*` added)
- Build: PASS (`cargo check` all crates clean)
- Coverage: ~100% for `git.rs` (5 tests covering happy path, empty output, blank lines, error propagation, timeout, deduplication)

## Dimensions Covered
| Dimension | Status | Files / Queries Examined |
|---|---|---|
| A. Integration Contracts | ⏭ Skipped (Not applicable) | No frontend components in this crate |
| B. Database & Schema | ⏭ Skipped (Not applicable) | No database usage in this crate |
| C. Configuration & Environment | ✅ Checked | Checked `config.rs`, `sandbox.rs`. No raw secrets found. |
| D. Dependency Health | ✅ Checked | Checked `Cargo.toml`. Found the missing `process` feature for `tokio`. |
| E. Test Coverage Gaps | ✅ Checked | Checked all `.rs` files. Found `git.rs` lacks test coverage. |
| F. Mobile ↔ Backend | ⏭ Skipped (Not applicable) | No mobile components in this crate |
