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impakt/docs/QA-2026-04-11_0619.md

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Quality Assessment -- 2026-04-11

Version: 0.1.0 Assessed by: Claude Sonnet 4.6 Previous assessment: QA-2026-04-11_0528.md

Inventory

Metric Value
Source files 72
Source lines 10,325
Test files 30
Test lines 2,736
Test:source ratio 0.26
Direct dependencies 10 core + 1 optional + 4 dev

Raw Metrics

Test Suite

240 passed, 7 warnings in 9.26s
  • Tests collected: 240
  • Tests passed: 240
  • Tests failed: 0
  • Test duration: 9.26s

Type Safety (mypy --strict)

Found 49 errors in 20 files (checked 72 source files)
  • Total errors: 49
  • Files with errors: 20 / 72 (72% clean)
  • Top error categories:
    • [type-arg] 17 — missing generic parameters on dict, list
    • [attr-defined] 9 — attribute access on loosely typed objects
    • [no-any-return] 5 — returning Any from typed functions
    • [var-annotated] 3
    • [import-untyped] 3
    • [assignment] 3
    • [valid-type] 2
    • [return-value] 2
    • [no-untyped-call] 2
    • [unused-ignore] 1
    • [no-untyped-def] 1
    • [comparison-overlap] 1

Lint (ruff)

Found 89 errors.
[*] 73 fixable with the `--fix` option (9 hidden fixes can be enabled with the `--unsafe-fixes` option).
  • Total violations: 89
  • Auto-fixable: 73 (82%)
  • Top violation rules:
    • F401 61 — unused imports
    • I001 9 — unsorted imports
    • F601 8 — duplicate dictionary keys
    • E501 5 — line too long
    • F841 3 — unused variables
    • P035 2 — string concatenation in f-string
    • F541 1 — f-string without placeholder

Complexity

  • File size: min=1 / median=133 / mean=143 / max=693
  • Files >300 lines: 6 / 72
  • High-complexity files (branch density >15):
  80  src/impakt/io/mme.py (693 lines)                        -- ISO 13499 parser, justified
  44  src/impakt/web/components/criteria.py (343 lines)       -- UI assembly with protocol logic
  30  src/impakt/channel/model.py (456 lines)                 -- core data model, multiple classes
  27  src/impakt/web/state.py (274 lines)                     -- app state with multi-test support
  27  src/impakt/protocol/euro_ncap.py (238 lines)            -- sliding-scale scoring tables
  25  src/impakt/web/callbacks/plot_callbacks.py (249 lines)  -- transform pipeline orchestration
  21  src/impakt/protocol/iihs.py (180 lines)                 -- G/A/M/P rating logic
  20  src/impakt/plot/engine.py (257 lines)                   -- Plotly rendering with corridors
  19  src/impakt/script/cli.py (140 lines)                    -- CLI arg parsing
  17  src/impakt/web/components/channel_grid.py (368 lines)   -- DataTable assembly
  16  src/impakt/web/callbacks/channel_callbacks.py (195 lines) -- selection/filter callbacks

Documentation

  • Docstring coverage: 414 / 454 definitions (91%)
  • Modules with __all__: 6 / 11 public modules
    • channel: YES
    • criteria: YES
    • io: NO
    • plot: YES
    • plugin: NO
    • protocol: YES
    • report: NO
    • script: NO
    • template: NO
    • transform: YES
    • web: YES
  • README: 1,266 lines with 20 Mermaid diagram references
  • Architectural diagrams: yes

Security

  • eval/exec (sandboxed): 1 — math_expr.py, restricted builtins {} + token blocklist; excluded from grep via # noqa: S307
  • eval/exec (unsandboxed): 0
  • subprocess: 0 actual invocations (the string "subprocess" at math_expr.py:70 is a forbidden-token blocklist entry, not a real call)
  • Hardcoded secrets: 0
  • Bare except: 0

Maintainability

  • TODO: 0
  • FIXME: 0
  • HACK: 0
  • Logging calls: 48
  • try/except blocks: 52
  • Bare excepts: 0
  • Internal imports (coupling): 190

Scorecard

# Dimension Weight Score Weighted Justification
1 Test Health 20% 8.0/10 1.60 240/240 pass. test:source ratio 0.26 (within 0.2–0.5 band). Integration tests with real datasets present. No coverage % configured.
2 Type Safety 15% 6.5/10 0.975 mypy strict enabled. 49 errors in 20 files, concentrated in web layer. Mostly cosmetic (type-arg 17). Interpolated between 6 (<50 errors) and 8 (<10 errors).
3 Lint Hygiene 10% 6.0/10 0.60 89 violations (82% auto-fixable). Dominated by unused imports (F401=61). 8 duplicate dict keys (F601) need manual fix. Rubric: <100, mostly auto-fixable = 6.
4 Architecture 15% 9.0/10 1.35 Clean 4-layer design (data→transform→protocol→web). Plugin system present. No layer violations found. 6/11 modules export __all__. Docked 1 point for 5 missing __all__.
5 Documentation 10% 9.0/10 0.90 91% docstring coverage (>90%). README with 20 Mermaid diagrams. No generated API reference docs, so not a full 10.
6 Complexity 10% 7.0/10 0.70 Median 133 (<150). 6 files >300 lines. mme.py at 693/80 complexity is the outlier — justified as a format parser. Interpolated between 8 (≤3 files >300) and 6 (≤10 files >300).
7 Security 10% 8.5/10 0.85 Single eval sandboxed with {"__builtins__": {}} + 16-item token blocklist. No subprocess, no secrets, no bare excepts. Interpolated between 9 (fully sandboxed) and 7 (partially sandboxed).
8 Maintainability 10% 8.5/10 0.85 Zero debt markers. Zero bare excepts. 48 logging calls across codebase. Modern tooling (uv, hatchling, ruff, mypy). Between 10 (perfect) and 8 (<5 markers).

Composite Score: 78.3 / 100

Grade: B

Calculation: (8.0×0.20 + 6.5×0.15 + 6.0×0.10 + 9.0×0.15 + 9.0×0.10 + 7.0×0.10 + 8.5×0.10 + 8.5×0.10) × 10 = (1.60 + 0.975 + 0.60 + 1.35 + 0.90 + 0.70 + 0.85 + 0.85) × 10 = 7.825 × 10 = 78.3

Delta from Previous Assessment

Dimension Previous Current Change
Test Health 8.0 8.0 0.0
Type Safety 6.5 6.5 0.0
Lint Hygiene 6.0 6.0 0.0
Architecture 9.0 9.0 0.0
Documentation 9.0 9.0 0.0
Complexity 7.0 7.0 0.0
Security 8.5 8.5 0.0
Maintainability 8.5 8.5 0.0
Composite 78.3 78.3 0.0

Top Improvements Since Last Assessment

No code changes detected since QA-2026-04-11_0528 — all raw metrics are identical.

Recommended Actions (Priority Order)

# Action Effort Impact Dimensions Affected
1 Run uv run ruff check --fix src/ to clear 73 auto-fixable violations 1 min +2.0 lint → 8.0 Lint Hygiene
2 Manually fix 8 duplicate dict keys (F601) in channel/lookup.py and remaining non-auto-fixable lint violations 15 min +1.0 lint → 9.0+ Lint Hygiene
3 Add --cov --cov-report=term-missing to pytest config; target ≥80% branch coverage 30 min +1.0 test → 9.0 Test Health
4 Resolve 17 [type-arg] mypy errors (add dict[str, X] / list[X] generics, primarily in web layer) 1 hr +1.0 type → 7.5 Type Safety
5 Add __all__ to io, plugin, report, script, template modules 30 min +0.5 arch → 9.5 Architecture

Projected composite after actions 1–5: ~85 (B+)

Notes

  • No code changes detected between this assessment and QA-2026-04-11_0528. All 72 source files and 30 test files are unchanged, yielding identical metrics and scores for the third consecutive assessment.
  • Architecture is qualitative. Import graph inspected: no layer violations found. The web module sits at the top of the dependency tree; io/transform/protocol layers do not import from web or plot.
  • Security eval in math_expr.py is sandboxed via empty __builtins__ dict and a 16-entry token blocklist (including import, exec, eval, subprocess, os., sys., __). The # noqa: S307 comment excludes it from the grep -v '# noqa' scan. An AST-based evaluator would be safer but is lower priority given existing mitigations.
  • Subprocess grep hit is a confirmed false positive: the string "subprocess" appears only as a forbidden-token blocklist entry at math_expr.py:70, not as an actual invocation.
  • Complexity scoring for mme.py remains lenient: ISO 13499 format parsers inherently carry high branch density. Consider extracting sub-parsers if it grows beyond ~800 lines.
  • The three assessments today (0459, 0528, 0619) are identical because no source code was modified between runs. The recommended actions above remain the highest-value next steps.
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