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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:

Glob for technology indicators
Build technology list
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 new | No | | Partial found | Merge (add missing) | Ask user | | Complete found | Skip | Inform user | | User requests replace | Backup + replace | Yes |

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.

Phase 4: Verification

After all workers complete, verify the quality pipeline works.

Verification Steps:

| Check | Command | Expected | |-------|---------|----------| | Lint runs | npm run lint / ruff check . / dotnet format --verify-no-changes | No errors | | Format runs | npm run format:check / ruff format --check | No changes needed | | Tests run | npm test / pytest / dotnet test | Sample tests pass | | Hooks work | Create test commit | Hooks trigger |

On Failure:

Log specific failure
Suggest fix or re-run specific worker
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.

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

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: 2.0.0 Last Updated: 2026-01-10