chore(monorepo): bootstrap workspace packages

docs/roadmaps/active/skill-workspace-monorepo-migration.md

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+# Skill Workspace Monorepo Migration
+
+## Status
+
+- `in_progress`
+
+## Owner
+
+- Codex
+
+## Started At
+
+- `2026-03-20`
+
+## Goal
+
+- Execute `Milestone 10: Skill Workspace Monorepo Migration` by moving the repository toward a true multi-package monorepo whose primary deliverables are skills and skill runtimes.
+
+## Scope
+
+- bootstrap the shared workspace structure described in `docs/skill-workspace-monorepo.md`
+- complete migration phases incrementally, committing after each completed phase
+- keep packaging, roadmap, and validation flows synchronized as the migration proceeds
+
+## Checklist
+
+- [x] create or adopt an active execution roadmap for the migration workstream
+- [x] Phase 1: bootstrap `go.work`, expanded workspace manifests, package roots, and declarative skill bundle metadata
+- [ ] Phase 2: extract shared coordination code into `packages/coord-core`
+- [ ] Phase 3: extract `inbox-runtime` and `orch-runtime`
+- [ ] Phase 4: extract `orchd-runtime`
+- [ ] Phase 5: import `repo-memory-runtime` and add `skills/repo-memory`
+- [ ] Phase 6: remove root runtime ownership and normalize package-based packaging
+
+## Files
+
+- `docs/roadmaps/active/skill-workspace-monorepo-migration.md`
+- `docs/skill-workspace-monorepo.md`
+- `docs/implementation-roadmap.md`
+- `go.work`
+- `pnpm-workspace.yaml`
+- `package.json`
+- `packages/`
+- `scripts/`
+
+## Decisions
+
+- keep one long-lived active roadmap for the full migration rather than opening a new execution trace for every individual phase
+- complete and commit one migration phase at a time so the workspace remains bisectable
+
+## Blockers
+
+- none
+
+## Next Step
+
+- start Phase 2 by extracting the shared coordination kernel into `packages/coord-core`, using the new workspace and bundle metadata scaffold as the stable base for subsequent package moves