---
phase: 16-integration-hardening
verified: 2026-02-24T12:00:00Z
status: passed
score: 10/10 must-haves verified
re_verification: false
gaps: []
human_verification: []
---

# Phase 16: Integration Hardening Verification Report

**Phase Goal:** The TypeScript chunker is production-safe under adversarial inputs (minified files, missing package install) and the full codebase passes the zero-violation quality gate
**Verified:** 2026-02-24
**Status:** PASSED
**Re-verification:** No — initial verification

## Goal Achievement

### Observable Truths

| #  | Truth | Status | Evidence |
|----|-------|--------|----------|
| 1  | Files exceeding 50,000 characters fall back to chunk_lines() — no chunk_name in output | VERIFIED | `if len(source) > 50_000: return chunk_lines(path)` at ts_chunker.py:119; test passes |
| 2  | chunk_typescript() completes normally when _get_cached_parser raises ImportError — returns chunk_lines() output | VERIFIED | `except ImportError: return chunk_lines(path)` at ts_chunker.py:126-127; test passes |
| 3  | ImportError and Exception are separate except clauses — not merged into except (ImportError, Exception) | VERIFIED | Lines 126-129 of ts_chunker.py show two distinct clauses: `except ImportError:` then `except Exception:` |
| 4  | tree_sitter imports are no longer at module level — importing ts_chunker succeeds when tree-sitter is absent | VERIFIED | `grep -n "^from tree_sitter" ts_chunker.py` returns nothing; import is inside `_get_cached_parser()` body at line 46; `if TYPE_CHECKING:` guard at line 14 for Parser type annotation |
| 5  | All 320 tests pass (318 pre-existing + 2 new tests from 16-01) | VERIFIED | `uv run pytest --tb=no -q` reports `320 passed in 3.35s` |
| 6  | uv run ruff check . exits 0 — zero violations across all source and test files | VERIFIED | `All checks passed!` exit 0 confirmed |
| 7  | uv run mypy src/ exits 0 — zero type errors in 54 source files | VERIFIED | `Success: no issues found in 54 source files` exit 0 confirmed |
| 8  | test_large_file_falls_back_to_chunk_lines exists in TestChunkTypeScript and passes | VERIFIED | Present at test_chunker.py:475; PASSED confirmed via pytest run |
| 9  | test_import_error_falls_back_to_chunk_lines exists in TestChunkTypeScript and passes | VERIFIED | Present at test_chunker.py:487; PASSED confirmed via pytest run |
| 10 | PROJECT.md v1.5 requirements IDX-08, IDX-09, QUAL-01 marked Validated | VERIFIED | All three IDs appear in two locations in PROJECT.md: checkbox list (lines 72-74) and Milestone Validation table (lines 82-84) |

**Score:** 10/10 truths verified

### Required Artifacts

| Artifact | Expected | Status | Details |
|----------|----------|--------|---------|
| `src/corpus_analyzer/ingest/ts_chunker.py` | Size guard: `if len(source) > 50_000: return chunk_lines(path)` | VERIFIED | Line 119, confirmed `50_000` present |
| `src/corpus_analyzer/ingest/ts_chunker.py` | ImportError branch: separate `except ImportError:` clause before `except Exception:` | VERIFIED | Lines 126 and 128 — two distinct clauses |
| `src/corpus_analyzer/ingest/ts_chunker.py` | Lazy import `from tree_sitter_language_pack import get_parser` inside `_get_cached_parser()` body | VERIFIED | Line 46 inside function body, not at module level |
| `tests/ingest/test_chunker.py` | Two new test methods in TestChunkTypeScript | VERIFIED | Lines 475 and 487 — both present and substantive |
| `.planning/PROJECT.md` | IDX-08, IDX-09, QUAL-01 marked Validated | VERIFIED | Lines 72-74 (checkboxes) and 82-84 (table) |

### Key Link Verification

| From | To | Via | Status | Details |
|------|----|-----|--------|---------|
| `ts_chunker.py::chunk_typescript` | `corpus_analyzer.ingest.chunker.chunk_lines` | size guard `len(source) > 50_000` early return | WIRED | Line 119-120 — guard present, chunk_lines called |
| `ts_chunker.py::chunk_typescript` | `corpus_analyzer.ingest.chunker.chunk_lines` | `except ImportError` branch after `_get_cached_parser()` | WIRED | Lines 126-127 — separate except clause calls chunk_lines |
| `ts_chunker.py::_get_cached_parser` | `tree_sitter_language_pack.get_parser` | lazy function-local import inside `_get_cached_parser` body | WIRED | Line 46 — import inside function, not module level |
| `tests/ingest/test_chunker.py::test_large_file_falls_back_to_chunk_lines` | `corpus_analyzer.ingest.ts_chunker.chunk_typescript` | direct call with 50,001-char file | WIRED | Lines 478-481 — writes 50,001 chars, calls chunk_typescript |
| `tests/ingest/test_chunker.py::test_import_error_falls_back_to_chunk_lines` | `corpus_analyzer.ingest.ts_chunker._get_cached_parser` | `unittest.mock.patch` with `side_effect=ImportError` | WIRED | Lines 494-498 — patch target matches `corpus_analyzer.ingest.ts_chunker._get_cached_parser` |
| `uv run ruff check .` | `tests/ingest/test_chunker.py` and `src/corpus_analyzer/ingest/ts_chunker.py` | full-repo lint sweep | WIRED | Exit 0; `All checks passed!` |
| `uv run mypy src/` | `src/corpus_analyzer/ingest/ts_chunker.py` | strict type check after lazy import restructure | WIRED | Exit 0; `Success: no issues found in 54 source files` |

### Requirements Coverage

| Requirement | Source Plan | Description | Status | Evidence |
|-------------|-------------|-------------|--------|----------|
| IDX-08 | 16-01-PLAN, 16-02-PLAN | Files exceeding 50,000 characters skip AST parse and fall back to `chunk_lines()` | SATISFIED | `if len(source) > 50_000: return chunk_lines(path)` at ts_chunker.py:119; test at test_chunker.py:475 passes; REQUIREMENTS.md line 23 marked `[x]` |
| IDX-09 | 16-01-PLAN, 16-02-PLAN | ImportError guard in chunk_typescript() — if tree-sitter absent, fall back to line chunking | SATISFIED | `except ImportError: return chunk_lines(path)` at ts_chunker.py:126; lazy import at line 46; test at test_chunker.py:487 passes; REQUIREMENTS.md line 24 marked `[x]` |
| QUAL-01 | 16-03-PLAN | ruff + mypy + 320 tests all pass | SATISFIED | ruff exit 0; mypy exit 0 (54 files); pytest 320 passed; REQUIREMENTS.md line 33 marked `[x]` |

No orphaned requirements: REQUIREMENTS.md traceability table (lines 68-72) maps IDX-08 and IDX-09 to Phase 16 with status `Complete`; QUAL-01 at line 72 likewise Phase 16.

### Anti-Patterns Found

No anti-patterns detected.

Scanned key files:
- `src/corpus_analyzer/ingest/ts_chunker.py` — no TODO/FIXME/placeholder comments; size guard returns real chunk_lines output; ImportError branch returns real chunk_lines output; no empty implementations
- `tests/ingest/test_chunker.py` — new test methods are substantive (write real files, make real assertions on chunk_name absence); no console.log or placeholder assertions

### Human Verification Required

None. All truths are programmatically verifiable:
- Quality gate commands are deterministic CLI invocations with exit codes
- Test pass/fail status is objective
- Code structure (separate except clauses, lazy import location, size guard constant) is directly grep-verifiable

### Gaps Summary

No gaps. All 10 observable truths verified. All 3 required artifacts exist, are substantive, and are wired. All 5 key links confirmed present. All 3 requirement IDs (IDX-08, IDX-09, QUAL-01) satisfied with evidence. Quality gate (ruff + mypy + 320 tests) confirmed passing against the live codebase.

---

## Verification Evidence Log

```
$ uv run ruff check .
All checks passed!
Exit: 0

$ uv run mypy src/
Success: no issues found in 54 source files
Exit: 0

$ uv run pytest --tb=no -q
320 passed in 3.35s
Exit: 0

$ uv run pytest tests/ingest/test_chunker.py::TestChunkTypeScript::test_large_file_falls_back_to_chunk_lines tests/ingest/test_chunker.py::TestChunkTypeScript::test_import_error_falls_back_to_chunk_lines -v
2 passed in 0.01s

$ grep -n "except ImportError\|except Exception" src/corpus_analyzer/ingest/ts_chunker.py
126:    except ImportError:
128:    except Exception:

$ grep -n "^from tree_sitter" src/corpus_analyzer/ingest/ts_chunker.py
(no output — zero module-level tree_sitter imports)

$ grep -n "50_000" src/corpus_analyzer/ingest/ts_chunker.py
119:    if len(source) > 50_000:

$ grep -E "IDX-08|IDX-09|QUAL-01" .planning/PROJECT.md
72: - [x] Size guard: 50K+ char files fall back to chunk_lines (IDX-08) — Validated
73: - [x] ImportError fallback when tree-sitter absent (IDX-09) — Validated
74: - [x] ruff + mypy + 320 tests all pass (QUAL-01) — Validated
82: | IDX-08 | Size guard: 50K+ char files fall back to chunk_lines | Validated |
83: | IDX-09 | ImportError fallback when tree-sitter absent | Validated |
84: | QUAL-01 | ruff + mypy + 320 tests all pass | Validated |
```

---

_Verified: 2026-02-24_
_Verifier: Claude (gsd-verifier)_
