[umiyosh]

Closes #4 except the branch protection step (after merge). Part of #2.

Why

The repository had no lint, no formatter check and no CI, so nothing stopped a regression from landing. This ports kotobae's TypeScript gates so every pull request runs them.

What changed

• ESLint (eslint.config.js): kotobae's config without the React plugins, Node globals. complexity / max-depth / max-lines / max-lines-per-function / max-params stay warnings.
• Prettier (.prettierrc, .prettierignore): kotobae's settings, plus embeddedLanguageFormatting: off for Markdown. Without it Prettier added a trailing comma inside the README's settings.json example, which breaks the JSON a user pastes. The .ts files and docs are reformatted (formatting only).
• Quality baseline (scripts/quality-gate*.mjs, quality-baseline.json, knip.json): the TypeScript scope of kotobae's gate. The Rust collectors and platform handling are removed. Two fixes on the way:
  • Knip 6 reports one entry per file with an array per issue type. kotobae's collector expects a type field per issue and so collects nothing. knipIssuesFromReport reads the new shape and has a test.
  • The ESLint message parser only read Function '...'. Async function 'main' ... fell back to a line-based key, so editing lines above main would have shown up as a new violation. It now reads async functions and methods, with a test.
• Knip findings fixed instead of baselined: runFfmpeg, FilmPart, Scene and TimingScene were exported but unused outside their file. The ffmpeg binary is ignored (it is the PATH fallback on purpose).
• Baseline: one entry, main in cli.ts with complexity 25 (limit 20).
• Makefile: lint, fmt, fmt-check, typecheck, quality-test, lint-quality, lint-quality-ts, quality-baseline, and check (everything CI runs). test / test-coverage come with Add unit tests, the coverage gate and a render smoke test #5.
• CI (.github/workflows/ci.yml): the node-suite job on pull_request, Node 22, npm ci, concurrency cancel, contents: read.
• PR template in English, and a Development section in both READMEs.

Verification

• make check: ESLint 0 errors / 1 baselined warning, Prettier clean, tsc clean, 21 quality gate tests pass, baseline gate unchanged
• The reformatted CLI still behaves the same on a real work dir: narrate leaves timing.json byte-identical, and stills at 30 s and 57.5 s match earlier PNGs byte for byte
• Plugin users do not get the new devDependencies: Claude Code 2.1.296 builds the plugin install from dependencies, optionalDependencies and peerDependencies only (read from the CLI's code, not from docs)
• CI passes on this pull request (node-suite)

Not verified

• After merge: add node-suite as a required status check on the Protect master ruleset (adding it before merge would block every open pull request that has no CI yet).