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+# Test Coverage and Quality Review
+
+**Reviewed by**: polecat/gus
+**Date**: 2026-01-04
+**Issue**: gt-a02fj.9
+
+## Executive Summary
+
+- **80 test files** covering **32 out of 42 packages** (76% package coverage)
+- **631 test functions** with 192 subtests (30% use table-driven pattern)
+- **10 packages** with **0 test coverage** (2,452 lines)
+- **1 confirmed flaky test** candidate
+- Test quality is generally good with moderate mocking
+
+---
+
+## Coverage Gap Inventory
+
+### Packages Without Tests (Priority Order)
+
+| Priority | Package | Lines | Risk | Notes |
+|----------|---------|-------|------|-------|
+| **P0** | `internal/lock` | 402 | **CRITICAL** | Multi-agent lock management. Bugs cause worker collisions. Already has `execCommand` mockable for testing. |
+| **P1** | `internal/events` | 295 | HIGH | Event bus for audit trail. Mutex-protected writes. Core observability. |
+| **P1** | `internal/boot` | 242 | HIGH | Boot watchdog lifecycle. Spawns tmux sessions. |
+| **P1** | `internal/checkpoint` | 216 | HIGH | Session crash recovery. Critical for polecat continuity. |
+| **P2** | `internal/tui/convoy` | 601 | MEDIUM | TUI component. Harder to test but user-facing. |
+| **P2** | `internal/constants` | 221 | LOW | Mostly configuration constants. Low behavioral risk. |
+| **P3** | `internal/style` | 331 | LOW | Output formatting. Visual only. |
+| **P3** | `internal/claude` | 80 | LOW | Claude settings parsing. |
+| **P3** | `internal/wisp` | 52 | LOW | Ephemeral molecule I/O. Small surface. |
+| **P4** | `cmd/gt` | 12 | TRIVIAL | Main entry point. Minimal code. |
+
+**Total untested lines**: 2,452
+
+---
+
+## Flaky Test Candidates
+
+### Confirmed: `internal/feed/curator_test.go`
+
+**Issue**: Uses `time.Sleep()` for synchronization (lines 59, 71, 119, 138)
+
+```go
+// Give curator time to start
+time.Sleep(50 * time.Millisecond)
+...
+// Wait for processing
+time.Sleep(300 * time.Millisecond)
+```
+
+**Risk**: Flaky under load, CI delays, or slow machines.
+
+**Fix**: Replace with channel-based synchronization or polling with timeout:
+```go
+// Wait for condition with timeout
+deadline := time.Now().Add(time.Second)
+for time.Now().Before(deadline) {
+    if conditionMet() {
+        break
+    }
+    time.Sleep(10 * time.Millisecond)
+}
+```
+
+---
+
+## Test Quality Analysis
+
+### Strengths
+
+1. **Table-driven tests**: 30% of tests use `t.Run()` (192/631)
+2. **Good isolation**: Only 2 package-level test variables
+3. **Dedicated integration tests**: 15 files with explicit integration/e2e naming
+4. **Error handling**: 316 uses of `if err != nil` in tests
+5. **No random data**: No `rand.` usage in tests (deterministic)
+6. **Environment safety**: Uses `t.Setenv()` for clean env var handling
+
+### Areas for Improvement
+
+1. **`testing.Short()`**: Only 1 usage. Long-running tests should check this.
+2. **External dependencies**: 26 tests skip when `bd` or `tmux` unavailable - consider mocking more.
+3. **time.Sleep usage**: Found in `curator_test.go` - should be eliminated.
+
+---
+
+## Test Smells (Minor)
+
+| Smell | Location | Severity | Notes |
+|-------|----------|----------|-------|
+| Sleep-based sync | `feed/curator_test.go` | HIGH | See flaky section |
+| External dep skips | Multiple files | LOW | Reasonable for integration tests |
+| Skip-heavy file | `tmux/tmux_test.go` | LOW | Acceptable - tmux not always available |
+
+---
+
+## Priority List for New Tests
+
+### Immediate (P0)
+
+1. **`internal/lock`** - Critical path
+   - Test `Acquire()` with stale lock cleanup
+   - Test `Check()` with live/dead PIDs
+   - Test `CleanStaleLocks()` with mock tmux sessions
+   - Test `DetectCollisions()`
+   - Test concurrent lock acquisition (race detection)
+
+### High Priority (P1)
+
+2. **`internal/events`**
+   - Test `Log()` file creation and append
+   - Test `write()` mutex behavior
+   - Test payload helpers
+   - Test graceful handling when not in workspace
+
+3. **`internal/boot`**
+   - Test `IsRunning()` with stale markers
+   - Test `AcquireLock()` / `ReleaseLock()` cycle
+   - Test `SaveStatus()` / `LoadStatus()` round-trip
+   - Test degraded mode path
+
+4. **`internal/checkpoint`**
+   - Test `Read()` / `Write()` round-trip
+   - Test `Capture()` git state extraction
+   - Test `IsStale()` with various durations
+   - Test `Summary()` output
+
+### Medium Priority (P2)
+
+5. **`internal/tui/convoy`** - Consider golden file tests for view output
+6. **`internal/constants`** - Test any validation logic
+
+---
+
+## Missing Test Types
+
+| Type | Current State | Recommendation |
+|------|--------------|----------------|
+| Unit tests | Good coverage where present | Add for P0-P1 packages |
+| Integration tests | 15 dedicated files | Adequate |
+| E2E tests | `browser_e2e_test.go` | Consider more CLI E2E |
+| Fuzz tests | None | Consider for parsers (`formula/parser.go`) |
+| Benchmark tests | None visible | Add for hot paths (`lock`, `events`) |
+
+---
+
+## Actionable Next Steps
+
+1. **Fix flaky test**: Refactor `feed/curator_test.go` to use channels/polling
+2. **Add lock tests**: Highest priority - bugs here break multi-agent
+3. **Add events tests**: Core observability must be tested
+4. **Add checkpoint tests**: Session recovery is critical path
+5. **Run with race detector**: `go test -race ./...` to catch data races
+6. **Consider `-short` flag**: Add `testing.Short()` checks to slow tests