Write scenario tests for mgw:milestone execution loop and failed-issue recovery

[snipcodeit]

Description

Cover: normal milestone execution in dependency order, failed issue triggering Retry/Skip/Abort, next-milestone GSD linkage check, rate limit guard triggering pause. Use mock agents to simulate execution results.

Acceptance Criteria

• Write scenario tests for mgw:milestone execution loop and failed-issue recovery

Milestone Context

Milestone	v6 — Local Testing & Simulation Framework
Phase	Phase 49: Command Scenario Tests
GSD Route	plan-phase
Phase Position	Phase 3 of 4 in milestone

Milestone Goal

Offline test suite with mock GitHub API and fake GSD agents to validate MGW orchestration logic without requiring live GitHub tokens or active Claude API calls.

Phase Goal

Scenario-based tests for mgw:project (all six state classes), mgw:milestone execution loop and recovery, and mgw:sync drift detection.

Dependencies

write-scenario-tests-for-mgwproject-state-detect

Scope Hints

• Estimated route: plan-phase
• Labels: testing,mgw:milestone

[snipcodeit]

MGW · work-started · 2026-03-06T10:23:45Z
Milestone: v6 — Local Testing & Simulation Framework | Phase 49: Command Scenario Tests

Work Started

Issue	#254 — Write scenario tests for mgw:milestone execution loop and failed-issue recovery
Route	plan-phase
Phase	49 — Command Scenario Tests
Position	8 of 11

Pipeline executing autonomously...

[snipcodeit]

MGW · pr-ready · 2026-03-06T10:38:00Z
Milestone: v6 — Local Testing & Simulation Framework | Phase 49: Command Scenario Tests

PR Ready

PR #265 — #265

Adds 39 vitest scenario tests for mgw:milestone execution loop covering dependency order, retry/skip/abort recovery, rate limit guard, and GSD linkage check.

Testing procedures posted on the PR.
This issue will auto-close when the PR is merged.

Pipeline Summary

Stage	Status
Triage	✓
Planning	✓
Execution	✓
PR Creation	✓

[snipcodeit]

MGW · pr-ready · 2026-03-06T10:36:21Z
Milestone: v6 — Local Testing & Simulation Framework | Phase 49: Command Scenario Tests

PR Ready

PR #265 — #265

Milestone Progress (8/11 complete)

#	Issue	Status	PR
247	Create lib/mock-github.cjs	✓ Done	#258
248	Create lib/mock-gsd-agent.cjs	✓ Done	#259
249	Add vitest test runner	✓ Done	#260
250	Integration tests: validate_and_load	✓ Done	#261
251	Tests: checkpoint read/write	✓ Done	#262
252	Pipeline stage transition tests	✓ Done	#263
253	Scenario tests: mgw:project	✓ Done	#264
254	Scenario tests: mgw:milestone	✓ Done	#265
255	Scenario tests: mgw:sync	○ Pending	—
256	GitHub Actions test workflow	○ Pending	—
257	Vitest coverage reporting	○ Pending	—