Paths: File paths (shared/, references/, ../ln-*) are relative to skills repo root. If not found at CWD, locate this SKILL.md directory and go up one level for repo root.

Quality Coordinator

Sequential coordinator for code quality pipeline. Invokes 4 workers in index order (511 -> 512 -> 513 -> 514) and returns aggregated results to ln-500.

Purpose & Scope

• Invoke ln-511-code-quality-checker (metrics, MCP Ref, static analysis)
• Invoke ln-512-tech-debt-cleaner (auto-fix safe findings from ln-511)
• Invoke ln-513-agent-reviewer (external agent reviews on cleaned code)
• Run Criteria Validation (Story dependencies, AC-Task Coverage, DB Creation Principle)
• Run linters from tech_stack.md
• Invoke ln-514-regression-checker (test suite after all changes)
• Return aggregated quality results to ln-500-story-quality-gate
• No verdict determination — ln-500 decides final Gate verdict

When to Use

• Invoked by ln-500-story-quality-gate Phase 2
• All implementation tasks in Story status = Done

Workflow

Phase 1: Discovery

1. Auto-discover team/config from docs/tasks/kanban_board.md
2. Load Story + task metadata from Linear (no full descriptions)

Fast-track mode: When invoked with --fast-track flag (readiness 10/10), run Phase 2 with --skip-mcp-ref (metrics + static only, no MCP Ref), skip Phase 3 (ln-512), Phase 4 (ln-513). Run Phase 5 (criteria), Phase 6 (linters), Phase 7 (ln-514).

Input: Story ID from ln-500-story-quality-gate

Phase 2: Code Quality (delegate to ln-511 — ALWAYS runs)

MANDATORY STEP: ln-511 invocation required in ALL modes. Full gate: ln-511 runs everything (metrics + MCP Ref + static analysis). Fast-track: ln-511 runs with --skip-mcp-ref (metrics + static analysis only — catches complexity, DRY, dead code without expensive MCP Ref calls).

1. Invoke ln-511-code-quality-checker via Skill tool
   • Full: ln-511 runs code metrics, MCP Ref validation (OPT/BP/PERF), static analysis
   • Fast-track: ln-511 runs code metrics + static analysis only (skips OPT-, BP-, PERF- MCP Ref checks)
   • Returns verdict (PASS/CONCERNS/ISSUES_FOUND) + code_quality_score + issues list
2. If ln-511 returns ISSUES_FOUND -> aggregate issues, continue (ln-500 decides action)

Invocation:

# Full gate:
Skill(skill: "ln-511-code-quality-checker", args: "{storyId}")
# Fast-track:
Skill(skill: "ln-511-code-quality-checker", args: "{storyId} --skip-mcp-ref")

Phase 3: Tech Debt Cleanup (delegate to ln-512 — SKIP if --fast-track)

MANDATORY STEP (full gate): ln-512 invocation required. Safe auto-fixes only (confidence >=90%). Fast-track: SKIP this phase.

1. Invoke ln-512-tech-debt-cleaner via Skill tool
   • ln-512 consumes findings from ln-511 output (passed via coordinator context)
   • Filters to auto-fixable categories (unused imports, dead code, deprecated aliases)
   • Applies safe fixes, verifies build integrity, creates commit
2. If ln-512 returns BUILD_FAILED -> all changes reverted, aggregate issue, continue

Invocation:

Skill(skill: "ln-512-tech-debt-cleaner", args: "{storyId}")

Phase 4: Agent Review (delegate to ln-513 — SKIP if --fast-track)

MANDATORY STEP (full gate): ln-513 invocation required. Returns SKIPPED gracefully if agents unavailable. Fast-track: SKIP this phase.

1. Invoke ln-513-agent-reviewer via Skill tool
   • ln-513 runs external agents (Codex + Gemini) in parallel on cleaned code
   • Critically verifies each suggestion, debates if disagreeing
   • Returns filtered suggestions with confidence scoring
2. Merge suggestions into issues list (same prefixes: SEC-, PERF-, MNT-, ARCH-, BP-, OPT-)
3. If verdict = SUGGESTIONS with area=security or area=correctness -> escalate aggregate to CONCERNS

Invocation:

Skill(skill: "ln-513-agent-reviewer", args: "{storyId}")

Phase 5: Criteria Validation

MANDATORY READ: Load references/criteria_validation.md

Phase 6: Linters

MANDATORY READ: shared/references/ci_tool_detection.md (Discovery Hierarchy + Command Registry)

1. Detect lint/typecheck commands per ci_tool_detection.md discovery hierarchy
2. Run all detected checks (timeouts per guide: 2min linters, 5min typecheck)
3. If any check fails -> aggregate issues, continue

Phase 7: Regression Tests (delegate to ln-514)

1. Invoke ln-514-regression-checker via Skill tool
   • Runs full test suite, reports PASS/FAIL
   • Runs AFTER ln-512 changes to verify nothing broke
2. If regression FAIL -> aggregate issues, continue

Invocation:

Skill(skill: "ln-514-regression-checker", args: "{storyId}")

Phase 8: Return Results

Return aggregated results to ln-500:

quality_check: PASS | CONCERNS | ISSUES_FOUND
code_quality_score: {0-100}
agent_review: CODE_ACCEPTABLE | SUGGESTIONS | SKIPPED
criteria_validation: PASS | FAIL
linters: PASS | FAIL
tech_debt_cleanup: CLEANED | NOTHING_TO_CLEAN | BUILD_FAILED | SKIPPED
regression: PASS | FAIL
issues:
  - {id: "SEC-001", severity: high, finding: "...", source: "ln-511"}
  - {id: "OPT-001", severity: medium, finding: "...", source: "ln-513"}
  - {id: "DEP-001", severity: medium, finding: "...", source: "criteria"}
  - {id: "LINT-001", severity: low, finding: "...", source: "linters"}

TodoWrite format (mandatory):

- Invoke ln-511-code-quality-checker (in_progress)
- Invoke ln-512-tech-debt-cleaner (pending)
- Invoke ln-513-agent-reviewer (pending)
- Criteria Validation (Story deps, AC coverage, DB schema) (pending)
- Run linters from tech_stack.md (pending)
- Invoke ln-514-regression-checker (pending)
- Return results to ln-500 (pending)

Worker Invocation (MANDATORY)

All workers: Invoke via Skill tool — workers see coordinator context. Sequential execution: 511 -> 512 -> 513 -> 514.

Anti-Patterns:

• Running mypy, ruff, pytest directly instead of invoking ln-511/ln-514
• Running agent reviews directly instead of invoking ln-513
• Auto-fixing code directly instead of invoking ln-512
• Marking steps as completed without invoking the actual skill
• Determining final verdict (that's ln-500's responsibility)

Critical Rules

• Return all results to ln-500; do NOT determine verdict
• Single source of truth: rely on Linear metadata for tasks
• Language preservation in comments (EN/RU)
• Do not create tasks or change statuses; ln-500 decides next actions

Definition of Done

• ln-511 invoked (ALWAYS — full or --skip-mcp-ref in fast-track), code quality score returned
• ln-512 invoked (or skipped if --fast-track), tech debt cleanup results returned
• ln-513 invoked (or skipped if --fast-track), agent review results returned
• Criteria Validation completed (3 checks)
• Linters executed
• ln-514 invoked, regression results returned
• Aggregated results returned to ln-500

Reference Files

• Criteria Validation: references/criteria_validation.md
• Gate levels: references/gate_levels.md
• Workers: ../ln-511-code-quality-checker/SKILL.md, ../ln-512-tech-debt-cleaner/SKILL.md, ../ln-513-agent-reviewer/SKILL.md, ../ln-514-regression-checker/SKILL.md
• Caller: ../ln-500-story-quality-gate/SKILL.md
• Test planning (separate coordinator): ../ln-520-test-planner/SKILL.md
• Tech stack/linters: docs/project/tech_stack.md

Version: 7.0.0 Last Updated: 2026-02-09