Agent-Skills.md

Agent Skills: ln-740-quality-setup

Sets up linters, pre-commit hooks, and test infrastructure. Use when adding code quality tooling to a project.

UncategorizedID: levnikolaevich/claude-code-skills/ln-740-quality-setup

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levnikolaevich/claude-code-skills
levnikolaevichLicense: MIT
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skills-catalog/ln-740-quality-setup/SKILL.md

Skill Metadata

Name
ln-740-quality-setup
Description
"Sets up linters, pre-commit hooks, and test infrastructure. Use when adding code quality tooling to a project."

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. If shared/ is missing, fetch files via WebFetch from https://raw.githubusercontent.com/levnikolaevich/claude-code-skills/master/skills/{path}.

ln-740-quality-setup

Type: L2 Domain Coordinator Category: 7XX Project Bootstrap Parent: ln-700-project-bootstrap

Coordinates code quality tooling configuration for the project.

Purpose & Scope

Does:

  • Detects project technology stack (TypeScript/React, .NET, Python)
  • Checks for existing quality configurations
  • Delegates to specialized workers for each quality aspect
  • Verifies final configuration works correctly

Does NOT:

  • Generate configuration files directly (workers do this)
  • Modify source code
  • Run in isolation (requires ln-720 structure first)

When to Use

| Trigger | Action | |---------|--------| | After ln-720-structure-migrator completes | Automatic delegation from ln-700 | | Manual quality setup needed | Invoke directly with project path | | Existing project needs quality tools | Run with existing config detection |

Workflow Overview

| Phase | Action | Output | |-------|--------|--------| | 1 | Stack Detection | Identified technologies | | 2 | Existing Config Check | Skip/merge/replace decisions | | 3 | Parallel Delegation | Worker invocations | | 4 | Verification | Working quality pipeline |

Phase 1: Stack Detection

Detect project technologies to determine which quality tools to configure.

Detection Rules:

| File Pattern | Technology | Linter Stack | |--------------|------------|--------------| | package.json + tsconfig.json | TypeScript/React | ESLint + Prettier | | *.csproj or *.sln | .NET | editorconfig + Roslyn | | pyproject.toml or requirements.txt | Python | Ruff | | Multiple detected | Mixed | Configure all detected |

Actions:

  1. Glob for technology indicators
  2. Build technology list
  3. Log detected stack to user

Phase 2: Existing Configuration Check

Before delegating, check what configurations already exist.

Config Files to Check:

| Technology | Config Files | |------------|--------------| | TypeScript | eslint.config.*, .prettierrc*, tsconfig.json | | .NET | .editorconfig, Directory.Build.props | | Python | ruff.toml, pyproject.toml [tool.ruff] | | Pre-commit | .husky/, .pre-commit-config.yaml | | Tests | vitest.config.*, pytest.ini, *.Tests.csproj |

Decision Matrix:

| Existing Config | Action | Confirmation | |-----------------|--------|--------------| | None found | Create from template | No | | Exists but incomplete | Extend to match template | No | | Exists and matches template | Skip | Inform user |

Completeness Check (Python): evaluate against ln-741's Completeness Check table (7 aspects: Ruff rules, per-file-ignores, advanced settings, MyPy strict, advanced tools, lint script, editorconfig). If ANY aspect is incomplete, delegate to ln-741 with instruction to EXTEND (not replace).

Phase 3: Parallel Delegation

Invoke workers for each quality aspect. Workers can run in parallel as they configure independent tools.

Delegation Order:

ln-740 (this)
    |
    +---> ln-741-linter-configurator
    |         - ESLint/Prettier (TypeScript)
    |         - editorconfig/Roslyn (.NET)
    |         - Ruff (Python)
    |
    +---> ln-742-precommit-setup
    |         - Husky + lint-staged (Node.js)
    |         - pre-commit framework (Python)
    |         - commitlint
    |
    +---> ln-743-test-infrastructure
              - Vitest (TypeScript)
              - xUnit (.NET)
              - pytest (Python)

Pass detected stack and existing configs to workers via direct Skill tool invocation. For Python: instruct ln-741 to apply full quality stack per its Completeness Check table.

Invocations:

Skill(skill: "ln-741-linter-configurator", args: "{projectPath}")
Skill(skill: "ln-742-precommit-setup", args: "{projectPath}")
Skill(skill: "ln-743-test-infrastructure", args: "{projectPath}")

Phase 4: Verification

After all workers complete, verify the quality pipeline works.

Verification Steps:

| Check | TypeScript | Python | .NET | |-------|-----------|--------|------| | Lint | ESLint | ruff check | dotnet format --verify-no-changes | | Format | Prettier | ruff format --check | dotnet format | | Type check | tsc --noEmit | mypy | Roslyn (build) | | Import boundaries | depcruise | lint-imports | -- | | Unused deps | knip | deptry | -- | | Dead code | knip | vulture | -- | | Vulnerability scan | npm audit | pip-audit | -- | | Unified script | bash scripts/lint.sh | bash scripts/lint.sh | bash scripts/lint.sh | | Tests | npm test | pytest | dotnet test | | Hooks | Create test commit | Create test commit | Create test commit |

On Failure:

  1. Log specific failure
  2. Suggest fix or re-run specific worker
  3. Do NOT mark as complete until verification passes

Critical Rules

RULE 1: Never overwrite existing user configurations without explicit confirmation.

RULE 2: Workers run AFTER stack detection - do not invoke workers without knowing the stack.

RULE 3: Verification phase is MANDATORY - quality setup is not complete until tools run successfully.

RULE 4: eslint-config-prettier is REQUIRED when both ESLint and Prettier are configured.

TodoWrite format (mandatory):

- Invoke ln-741-linter-configurator (pending)
- Invoke ln-742-precommit-setup (pending)
- Invoke ln-743-test-infrastructure (pending)
- Verify quality pipeline (pending)

Worker Invocation (MANDATORY)

| Phase | Worker | Context | |-------|--------|---------| | 3a | ln-741-linter-configurator | Shared (Skill tool) — ESLint/Prettier, editorconfig, Ruff | | 3b | ln-742-precommit-setup | Shared (Skill tool) — Husky, lint-staged, commitlint | | 3c | ln-743-test-infrastructure | Shared (Skill tool) — Vitest, xUnit, pytest |

All workers: Invoke via Skill tool — workers see coordinator context.

Definition of Done

  • [ ] All detected technology stacks have appropriate quality tools
  • [ ] Existing configurations preserved or backed up
  • [ ] Lint command runs without errors
  • [ ] Format command runs without errors
  • [ ] Test command runs and sample tests pass
  • [ ] Pre-commit hooks trigger on test commit
  • [ ] User informed of all installed tools and commands

Phase 5: Meta-Analysis

MANDATORY READ: Load shared/references/meta_analysis_protocol.md

Skill type: execution-orchestrator. Analyze this session per protocol §7. Output per protocol format.

Reference Files

| File | Purpose | |------|---------| | stack_detection.md | Detailed detection rules | | verification_checklist.md | Full verification checklist |

Error Handling

| Error | Cause | Resolution | |-------|-------|------------| | No stack detected | Empty project | Ask user for intended stack | | Worker failed | Missing dependencies | Install prerequisites, retry | | Verification failed | Config error | Check specific tool output, fix | | Hooks not working | Git not initialized | Run git init first |

Version: 3.0.0 Last Updated: 2026-03-18

ln-740-quality-setup Skill | Agent Skills