feat!: unify mosaic CLI — native launcher, no bin/ directory

BREAKING CHANGE: ~/.config/mosaic/bin/ is removed entirely.
The mosaic npm CLI is now the only executable.

## What changed

- **bin/ → deleted**: All scripts moved to tools/_scripts/ (internal)
- **mosaic-launch → deleted**: Launcher logic is native TypeScript
  in packages/cli/src/commands/launch.ts
- **mosaic.ps1 → deleted**: PowerShell launcher removed
- **Framework install.sh**: Complete rewrite with migration system
- **Version tracking**: .framework-version file (schema v2)
- **Migration v1→v2**: Auto-removes bin/, cleans old PATH entries
  from shell profiles

## Native TypeScript launcher (commands/launch.ts)

All runtime launch logic ported from bash:
- Runtime prompt builder (AGENTS.md + RUNTIME.md + USER.md + TOOLS.md)
- Mission context injection (reads .mosaic/orchestrator/mission.json)
- PRD status injection (scans docs/PRD.md)
- Pre-flight checks (MOSAIC_HOME, AGENTS.md, SOUL.md, runtime binary)
- Session lock management with signal cleanup
- Per-runtime launch: Claude, Codex, OpenCode, Pi
- Yolo mode flags per runtime
- Pi skill discovery + extension loading
- Framework management (init, doctor, sync, bootstrap) delegates
  to tools/_scripts/ bash implementations

## Installer

- tools/install.sh: detects framework by .framework-version or AGENTS.md
- Framework install.sh: migration system with schema versioning
- Forward-compatible: add migrations as numbered blocks
- No PATH manipulation for framework (npm bin is the only PATH entry)

packages/mosaic/framework/tools/_scripts/mosaic-bootstrap-repo

@@ -0,0 +1,126 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+TARGET_DIR="$(pwd)"
+FORCE=0
+QUALITY_TEMPLATE=""
+
+while [[ $# -gt 0 ]]; do
+  case "$1" in
+    --force)
+      FORCE=1
+      shift
+      ;;
+    --quality-template)
+      QUALITY_TEMPLATE="${2:-}"
+      shift 2
+      ;;
+    *)
+      TARGET_DIR="$1"
+      shift
+      ;;
+  esac
+done
+
+if [[ ! -d "$TARGET_DIR" ]]; then
+  echo "[mosaic] Target directory does not exist: $TARGET_DIR" >&2
+  exit 1
+fi
+
+MOSAIC_HOME="${MOSAIC_HOME:-$HOME/.config/mosaic}"
+TEMPLATE_ROOT="$MOSAIC_HOME/templates/repo"
+
+if [[ ! -d "$TEMPLATE_ROOT" ]]; then
+  echo "[mosaic] Missing templates at $TEMPLATE_ROOT" >&2
+  echo "[mosaic] Install or refresh framework: ~/.config/mosaic/install.sh" >&2
+  exit 1
+fi
+
+mkdir -p "$TARGET_DIR/.mosaic" "$TARGET_DIR/scripts/agent"
+mkdir -p "$TARGET_DIR/.mosaic/orchestrator" "$TARGET_DIR/.mosaic/orchestrator/logs" "$TARGET_DIR/.mosaic/orchestrator/results"
+
+copy_file() {
+  local src="$1"
+  local dst="$2"
+
+  if [[ -f "$dst" && "$FORCE" -ne 1 ]]; then
+    echo "[mosaic] Skip existing: $dst"
+    return
+  fi
+
+  cp "$src" "$dst"
+  echo "[mosaic] Wrote: $dst"
+}
+
+copy_file "$TEMPLATE_ROOT/.mosaic/README.md" "$TARGET_DIR/.mosaic/README.md"
+copy_file "$TEMPLATE_ROOT/.mosaic/repo-hooks.sh" "$TARGET_DIR/.mosaic/repo-hooks.sh"
+copy_file "$TEMPLATE_ROOT/.mosaic/quality-rails.yml" "$TARGET_DIR/.mosaic/quality-rails.yml"
+copy_file "$TEMPLATE_ROOT/.mosaic/orchestrator/config.json" "$TARGET_DIR/.mosaic/orchestrator/config.json"
+copy_file "$TEMPLATE_ROOT/.mosaic/orchestrator/tasks.json" "$TARGET_DIR/.mosaic/orchestrator/tasks.json"
+copy_file "$TEMPLATE_ROOT/.mosaic/orchestrator/state.json" "$TARGET_DIR/.mosaic/orchestrator/state.json"
+copy_file "$TEMPLATE_ROOT/.mosaic/orchestrator/matrix_state.json" "$TARGET_DIR/.mosaic/orchestrator/matrix_state.json"
+copy_file "$TEMPLATE_ROOT/.mosaic/orchestrator/logs/.gitkeep" "$TARGET_DIR/.mosaic/orchestrator/logs/.gitkeep"
+copy_file "$TEMPLATE_ROOT/.mosaic/orchestrator/results/.gitkeep" "$TARGET_DIR/.mosaic/orchestrator/results/.gitkeep"
+
+for file in "$TEMPLATE_ROOT"/scripts/agent/*.sh; do
+  base="$(basename "$file")"
+  copy_file "$file" "$TARGET_DIR/scripts/agent/$base"
+  chmod +x "$TARGET_DIR/scripts/agent/$base"
+done
+
+if [[ ! -f "$TARGET_DIR/AGENTS.md" ]]; then
+  cat > "$TARGET_DIR/AGENTS.md" <<'AGENTS_EOF'
+# Agent Guidelines
+
+## Required Load Order
+
+1. `~/.config/mosaic/SOUL.md`
+2. `~/.config/mosaic/STANDARDS.md`
+3. `~/.config/mosaic/AGENTS.md`
+4. `~/.config/mosaic/guides/E2E-DELIVERY.md`
+5. `AGENTS.md` (this file)
+6. Runtime-specific guide: `~/.config/mosaic/runtime/<runtime>/RUNTIME.md`
+7. `.mosaic/repo-hooks.sh`
+
+## Session Lifecycle
+
+```bash
+bash scripts/agent/session-start.sh
+bash scripts/agent/critical.sh
+bash scripts/agent/session-end.sh
+```
+
+## Shared Tools
+
+- Quality and orchestration guides: `~/.config/mosaic/guides/`
+- Shared automation tools: `~/.config/mosaic/tools/`
+
+## Repo-Specific Notes
+
+- Add project constraints and workflows here.
+- Implement hook functions in `.mosaic/repo-hooks.sh`.
+- Scratchpads are mandatory for non-trivial tasks.
+AGENTS_EOF
+  echo "[mosaic] Wrote: $TARGET_DIR/AGENTS.md"
+else
+  echo "[mosaic] AGENTS.md exists; add standards load order if missing"
+fi
+
+echo "[mosaic] Repo bootstrap complete: $TARGET_DIR"
+echo "[mosaic] Next: edit $TARGET_DIR/.mosaic/repo-hooks.sh with project workflows"
+echo "[mosaic] Optional: apply quality tools via ~/.config/mosaic/bin/mosaic-quality-apply --template <template> --target $TARGET_DIR"
+echo "[mosaic] Optional: run orchestrator rail via ~/.config/mosaic/bin/mosaic-orchestrator-drain"
+echo "[mosaic] Optional: run detached orchestrator via bash $TARGET_DIR/scripts/agent/orchestrator-daemon.sh start"
+
+if [[ -n "$QUALITY_TEMPLATE" ]]; then
+  if [[ -x "$MOSAIC_HOME/tools/_scripts/mosaic-quality-apply" ]]; then
+    "$MOSAIC_HOME/tools/_scripts/mosaic-quality-apply" --template "$QUALITY_TEMPLATE" --target "$TARGET_DIR"
+    if [[ -f "$TARGET_DIR/.mosaic/quality-rails.yml" ]]; then
+      sed -i "s/^enabled:.*/enabled: true/" "$TARGET_DIR/.mosaic/quality-rails.yml"
+      sed -i "s/^template:.*/template: \"$QUALITY_TEMPLATE\"/" "$TARGET_DIR/.mosaic/quality-rails.yml"
+    fi
+    echo "[mosaic] Applied quality tools template: $QUALITY_TEMPLATE"
+  else
+    echo "[mosaic] WARN: mosaic-quality-apply not found; skipping quality tools apply" >&2
+  fi
+fi