chore: planning gate — milestones, issues, and task breakdown

Break PRD into 8 milestones (Phase 0–7) with 59 issues on Gitea.
Populate TASKS.md, update mission manifest, initialize scratchpad.
Repo created at git.mosaicstack.dev/mosaic/mosaic-stack.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

docs/scratchpads/mvp-20260312.md

@@ -0,0 +1,50 @@
+# Mission Scratchpad — MVP
+
+> Append-only log. NEVER delete entries. NEVER overwrite sections.
+> This is the orchestrator's working memory across sessions.
+
+## Original Mission Prompt
+
+```
+Active mission detected: MVP. Read the mission state files and report status.
+User confirmed: start the planning gate.
+```
+
+## Planning Decisions
+
+### 2026-03-13 — Milestone and task breakdown
+
+- PRD defines 8 phases (Phase 0–7), mapped 1:1 to Gitea milestones
+- 59 issues created on git.mosaicstack.dev/mosaic/mosaic-stack (#1–#59)
+- Each phase has a verification task as the final issue
+- Task IDs use P{phase}-{seq} format (P0-001 through P7-008)
+- Repo created as `mosaic/mosaic-stack` (private) on Gitea
+- Milestones: ms-157 (Phase 0) through ms-164 (Phase 7)
+- Total: 59 tasks across 8 milestones
+
+### Phase structure
+
+| Phase | Version | Tasks | Focus |
+|-------|---------|-------|-------|
+| 0 | v0.0.1 | 9 | Foundation — monorepo, types, db, auth, OTEL, Docker, CI |
+| 1 | v0.0.2 | 9 | Core API — gateway, brain, queue, routes, WebSocket |
+| 2 | v0.0.3 | 7 | Agent Layer — Pi SDK, multi-provider, routing, coord |
+| 3 | v0.0.4 | 8 | Web Dashboard — Next.js, chat, tasks, projects, admin |
+| 4 | v0.0.5 | 7 | Memory & Intelligence — memory, log, summarization, skills |
+| 5 | v0.0.6 | 5 | Remote Control — Discord, Telegram, SSO |
+| 6 | v0.0.7 | 6 | CLI & Tools — CLI, prdy, quality-rails, installer, TUI |
+| 7 | v0.1.0 | 8 | Polish & Beta — MCP, providers, E2E, docs, release |
+
+## Session Log
+
+| Session | Date | Milestone | Tasks Done | Outcome |
+|---------|------|-----------|------------|---------|
+| 1 | 2026-03-13 | Planning | Planning gate | Milestones created, 59 issues created, TASKS.md populated, manifest updated |
+
+## Open Questions
+
+(none at this time)
+
+## Corrections
+
+(none at this time)