Release v0.6.0 — Test Infrastructure & CI Hardening · snipcodeit/mgw

What's New

This release ships the complete test infrastructure for MGW and fixes CI to run cleanly on Node 18 and 20.

MGW now has a full test suite (173 tests across 6 files) backed by purpose-built mock layers:

lib/mock-github.cjs — GitHub API interceptor that routes gh CLI calls to local JSON fixtures, enabling offline pipeline tests without hitting the GitHub API
lib/mock-gsd-agent.cjs — Fake Task() agent stubs that return fixture-driven outputs for planner, executor, verifier, and comment classifier agents
lib/mock-gsd-agent.cjs + lib/mock-github.cjs — Both mocks activate via setup.js and deactivate cleanly after each test, giving tests full control over pipeline behavior

Test File	Tests	What It Covers
`checkpoint.test.js`	36	Checkpoint read/write, merge strategy, resume detection
`validate-and-load.test.js`	23	State file lifecycle, staleness detection, schema migration
`pipeline-transitions.test.js`	28	Stage transition rules, hook firing, failed-issue recovery
`project-state-detection.test.js`	19	All six `mgw:project` STATE_CLASS routing paths
`milestone-execution.test.js`	39	Dependency ordering, blocked-issue detection, abort/skip/retry
`sync-drift.test.js`	28	Drift detection, auto-sync, comment delta, label drift

Added test.yml workflow — runs npm test on Node 18 and 20 matrix on every push and PR
Added test:coverage step (Node 20 only) with 70% line threshold and artifact upload
Fixed ESM config loading failure on Node 18: renamed vitest.config.js → vitest.config.mjs
Resolved all 64 ESLint errors across lib/ and test/ files (unused vars, missing error causes, useless assignments, missing Node globals for ESM test files)

lib/retry-policy.cjs: Fixed abort listener leak in backoff Promise — the resolve reassignment pattern didn't work because setTimeout captured the original reference; restructured to properly remove the listener when the timer fires
lib/state.cjs: Added { cause: err } to re-thrown errors for better stack traces in pipeline failures
lib/diagnostic-hooks.cjs: Removed unused path/fs requires

173 tests passing. Lint clean. CI green on Node 18 and 20.

feat: add lib/mock-github.cjs with GitHub API interceptors for tests by @snipcodeit in #258
feat: add lib/mock-gsd-agent.cjs with fake Task() agent stubs by @snipcodeit in #259
feat: add vitest test runner with fixture loader and mock activation by @snipcodeit in #260
test: integration tests for validate_and_load and state lifecycle by @snipcodeit in #261
test: checkpoint read/write and resume detection tests by @snipcodeit in #262
test(pipeline): add pipeline stage transition tests for mgw:run by @snipcodeit in #263
test(project): add scenario tests for all six mgw:project STATE_CLASS paths by @snipcodeit in #264
test: add milestone execution scenario tests by @snipcodeit in #265
test(sync): add scenario tests for mgw:sync drift detection and auto-sync by @snipcodeit in #266
ci: add test.yml workflow for Node 18 and 20 matrix by @snipcodeit in #267
ci(coverage): add vitest v8 coverage with 70% line threshold by @snipcodeit in #268

Full Changelog: v0.5.1...v0.6.0