feat: complete framework migration — PowerShell, adapters, guides, profiles, tests

Completes the bootstrap repo migration with remaining files:
- PowerShell scripts (.ps1) for Windows support (bin/ + tools/)
- Runtime adapters (claude, codex, generic, pi)
- Guides (17 .md files) and profiles (domains, tech-stacks, workflows)
- Wizard test suite (6 test files from bootstrap tests/)
- Memory placeholder, audit history

Bootstrap repo (mosaic/bootstrap) is now fully superseded:
- All 335 files accounted for
- 5 build config files (package.json, tsconfig, etc.) not needed —
  monorepo has its own at packages/mosaic/
- skills-local/ superseded by monorepo skills/ with mosaic-* naming
- src/ already lives at packages/mosaic/src/

packages/mosaic/framework/guides/MEMORY.md

@@ -0,0 +1,51 @@
+# Memory and Retention Rules
+
+## Primary Memory Layer: OpenBrain
+
+**OpenBrain is the canonical shared memory for all Mosaic agents across all harnesses and sessions.**
+
+Use the `capture` MCP tool (or REST `POST /v1/thoughts`) to store:
+
+- Discovered gotchas and workarounds
+- Architectural decisions and rationale
+- Project state and context for handoffs
+- Anything a future agent should know
+
+Use `search` or `recent` at session start to load prior context before acting.
+
+This is not optional. An agent that uses local file-based memory instead of OpenBrain is a broken agent — its knowledge is invisible to every other agent on the platform.
+
+## Hard Rules
+
+1. Agent learnings MUST go to OpenBrain — not to any file-based memory location.
+2. You MUST NOT write to runtime-native memory silos (they are write-blocked by hook).
+3. Active execution state belongs in project `docs/` — not in memory files.
+4. `~/.config/mosaic/memory/` is for mosaic framework technical notes only, not project knowledge.
+
+## Runtime-Native Memory Silos (WRITE-BLOCKED)
+
+These locations are blocked by PreToolUse hooks. Attempting to write there fails at the tool level.
+
+| Runtime     | Blocked silo                       | Use instead         |
+| ----------- | ---------------------------------- | ------------------- |
+| Claude Code | `~/.claude/projects/*/memory/*.md` | OpenBrain `capture` |
+| Codex       | Runtime session memory             | OpenBrain `capture` |
+| OpenCode    | Runtime session memory             | OpenBrain `capture` |
+
+MEMORY.md files may only contain behavioral guardrails that must be injected at load-path — not knowledge.
+
+## Project Continuity Files (MANDATORY)
+
+| File                             | Purpose                                   | Location                    |
+| -------------------------------- | ----------------------------------------- | --------------------------- |
+| `docs/PRD.md` or `docs/PRD.json` | Source of requirements                    | Project `docs/`             |
+| `docs/TASKS.md`                  | Task tracking, milestones, issues, status | Project `docs/`             |
+| `docs/scratchpads/<task>.md`     | Task-specific working memory              | Project `docs/scratchpads/` |
+| `AGENTS.md`                      | Project-local patterns and conventions    | Project root                |
+
+## How the Block Works
+
+`~/.config/mosaic/tools/qa/prevent-memory-write.sh` is registered as a `PreToolUse` hook in
+`~/.claude/settings.json`. It intercepts Write/Edit/MultiEdit calls and rejects any targeting
+`~/.claude/projects/*/memory/*.md` before the tool executes. Exit code 2 blocks the call and
+the agent sees a message directing it to OpenBrain instead.