feat: integrate framework files into monorepo under packages/mosaic/framework/

Moves all Mosaic framework runtime files from the separate bootstrap repo
into the monorepo as canonical source. The @mosaic/mosaic npm package now
ships the complete framework — bin scripts, runtime configs, tools, and
templates — enabling standalone installation via npm install.

Structure:
  packages/mosaic/framework/
  ├── bin/          28 CLI scripts (mosaic, mosaic-doctor, mosaic-sync-skills, etc.)
  ├── runtime/      Runtime adapters (claude, codex, opencode, pi, mcp)
  ├── tools/        Shell tooling (git, prdy, orchestrator, quality, etc.)
  ├── templates/    Agent and repo templates
  ├── defaults/     Default identity files (AGENTS.md, STANDARDS.md, SOUL.md, etc.)
  ├── install.sh    Legacy bash installer
  └── remote-install.sh  One-liner remote installer

Key files with Pi support and recent fixes:
- bin/mosaic: launch_pi() with skills-local loop
- bin/mosaic-doctor: --fix auto-wiring for all 4 harnesses
- bin/mosaic-sync-skills: Pi as 4th link target, symlink-aware find
- bin/mosaic-link-runtime-assets: Pi settings.json patching
- bin/mosaic-migrate-local-skills: Pi skill roots, symlink find
- runtime/pi/RUNTIME.md + mosaic-extension.ts

Package ships 251 framework files in the npm tarball (278KB compressed).

packages/mosaic/framework/tools/qa/prevent-memory-write.sh

@@ -0,0 +1,34 @@
+#!/usr/bin/env bash
+# prevent-memory-write.sh — PreToolUse hook
+#
+# Blocks Write/Edit/MultiEdit calls targeting Claude Code's native auto-memory
+# files (~/.claude/projects/*/memory/*.md).
+#
+# These files are runtime-specific silos that no other agent harness can read.
+# All agent learnings MUST go to OpenBrain (capture MCP tool or REST API).
+# MEMORY.md files may only contain load-path behavioral guardrails — not knowledge.
+#
+# Exit codes (Claude Code PreToolUse):
+#   0 = allow
+#   2 = block with message shown to agent
+
+set -euo pipefail
+
+INPUT="$(cat)"
+
+FILE_PATH="$(echo "$INPUT" | jq -r '.tool_input.file_path // empty' 2>/dev/null || true)"
+
+[[ -z "$FILE_PATH" ]] && exit 0
+
+# Resolve ~ to HOME
+FILE_PATH="${FILE_PATH/#\~/$HOME}"
+
+# Block writes to Claude Code auto-memory files
+if [[ "$FILE_PATH" =~ /.claude/projects/.+/memory/.*\.md$ ]]; then
+  echo "BLOCKED: Do not write agent learnings to ~/.claude/projects/*/memory/ — this is a runtime-specific silo."
+  echo "Use OpenBrain instead: MCP 'capture' tool or REST POST https://brain.woltje.com/v1/thoughts"
+  echo "File blocked: $FILE_PATH"
+  exit 2
+fi
+
+exit 0