feat: monorepo consolidation — forge pipeline, MACP protocol, framework plugin, profiles/guides/skills

Work packages completed:
- WP1: packages/forge — pipeline runner, stage adapter, board tasks, brief classifier,
  persona loader with project-level overrides. 89 tests, 95.62% coverage.
- WP2: packages/macp — credential resolver, gate runner, event emitter, protocol types.
  65 tests, 96.24% coverage. Full Python-to-TS port preserving all behavior.
- WP3: plugins/mosaic-framework — OC rails injection plugin (before_agent_start +
  subagent_spawning hooks for Mosaic contract enforcement).
- WP4: profiles/ (domains, tech-stacks, workflows), guides/ (17 docs),
  skills/ (5 universal skills), forge pipeline assets (48 markdown files).

Board deliberation: docs/reviews/consolidation-board-memo.md
Brief: briefs/monorepo-consolidation.md

Consolidates mosaic/stack (forge, MACP, bootstrap framework) into mosaic/mosaic-stack.
154 new tests total. Zero Python — all TypeScript/ESM.

profiles/README.md

@@ -0,0 +1,22 @@
+# Mosaic Profiles
+
+Profiles are runtime-neutral context packs that can be consumed by any agent runtime.
+
+## Layout
+
+- `domains/`: regulated-domain and security context (HIPAA, fintech, crypto, etc.)
+- `tech-stacks/`: stack-specific conventions and quality checks
+- `workflows/`: reusable execution workflows
+
+## Runtime Split
+
+- Runtime-neutral content belongs here under `~/.config/mosaic/profiles`.
+- Runtime-specific settings belong under `~/.config/mosaic/runtime/<runtime>/...`.
+
+Current runtime overlay example:
+
+- `~/.config/mosaic/runtime/claude/settings-overlays/jarvis-loop.json`
+
+## Claude Compatibility
+
+`mosaic-link-runtime-assets` prunes legacy preset symlink trees from `~/.claude` so Mosaic remains canonical and Claude uses runtime overlays that reference Mosaic paths directly.