chore: pause work and save context handoff

.agent/skills/gsd-milestone-summary/SKILL.md

@@ -0,0 +1,44 @@
+---
+name: gsd-milestone-summary
+description: Generate a comprehensive project summary from milestone artifacts for team onboarding and review
+---
+
+
+<objective>
+Generate a structured milestone summary for team onboarding and project review. Reads completed milestone artifacts (ROADMAP, REQUIREMENTS, CONTEXT, SUMMARY, VERIFICATION files) and produces a human-friendly overview of what was built, how, and why.
+
+Purpose: Enable new team members to understand a completed project by reading one document and asking follow-up questions.
+Output: MILESTONE_SUMMARY written to `.planning/reports/`, presented inline, optional interactive Q&A.
+</objective>
+
+<execution_context>
+@.agent/get-shit-done/workflows/milestone-summary.md
+</execution_context>
+
+<context>
+**Project files:**
+- `.planning/ROADMAP.md`
+- `.planning/PROJECT.md`
+- `.planning/STATE.md`
+- `.planning/RETROSPECTIVE.md`
+- `.planning/milestones/v{version}-ROADMAP.md` (if archived)
+- `.planning/milestones/v{version}-REQUIREMENTS.md` (if archived)
+- `.planning/phases/*-*/` (SUMMARY.md, VERIFICATION.md, CONTEXT.md, RESEARCH.md)
+
+**User input:**
+- Version: $ARGUMENTS (optional — defaults to current/latest milestone)
+</context>
+
+<process>
+Read and execute the milestone-summary workflow from @.agent/get-shit-done/workflows/milestone-summary.md end-to-end.
+</process>
+
+<success_criteria>
+- Milestone version resolved (from args, STATE.md, or archive scan)
+- All available artifacts read (ROADMAP, REQUIREMENTS, CONTEXT, SUMMARY, VERIFICATION, RESEARCH, RETROSPECTIVE)
+- Summary document written to `.planning/reports/MILESTONE_SUMMARY-v{version}.md`
+- All 7 sections generated (Overview, Architecture, Phases, Decisions, Requirements, Tech Debt, Getting Started)
+- Summary presented inline to user
+- Interactive Q&A offered
+- STATE.md updated
+</success_criteria>