Implement registration UX wishlist W1–W6 (260224)

W1: Document user-scope MCP config location in ~/.claude/CLAUDE.md —
    adds verification and re-registration commands, warns against
    settings.json (saves ~12K tokens per registration session).

W2: scripts/register_project.sh + make register-project —
    5-step automation: API health → topic lookup → MCP check →
    CLAUDE.md from template → progress event.

W3: state-hub/scripts/project_claude_md.template —
    parameterised CLAUDE.md with {PROJECT_NAME}/{DOMAIN}/{TOPIC_ID}
    placeholders; used by register_project.sh.

W4: Add custodian_topic_id + domain to all 6 canon project charters —
    lets agents grep for topic IDs without touching the API.

W5: state-hub/mcp_server/TOOLS.md — compact 30-line tool reference
    card; replaces reading the full server.py (~350 lines).

W6: Switch .mcp.json to absolute path + PYTHONPATH env so cwd is not
    required; add scripts/patch_mcp_cwd.py for post-registration fix.
    Update ~/.claude.json to match (cwd kept for belt-and-suspenders).

W7 (SessionStart hook) deferred: no SessionStart hook type in Claude
    Code; PreToolUse with empty matcher fires before every tool call.

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

scripts/patch_mcp_cwd.py

@@ -0,0 +1,42 @@
+#!/usr/bin/env python3
+"""
+Patch ~/.claude.json to add the cwd field to the state-hub MCP entry.
+
+claude mcp add-json silently drops the cwd field. Run this script after
+any claude mcp add-json call to restore it.
+
+Usage: python3 scripts/patch_mcp_cwd.py
+"""
+import json
+import os
+from pathlib import Path
+
+CLAUDE_JSON = Path.home() / ".claude.json"
+STATE_HUB_DIR = Path(__file__).resolve().parent.parent  # state-hub/
+
+def main() -> None:
+    if not CLAUDE_JSON.exists():
+        print(f"ERROR: {CLAUDE_JSON} not found. Run 'claude mcp add-json' first.")
+        raise SystemExit(1)
+
+    config = json.loads(CLAUDE_JSON.read_text())
+    servers = config.setdefault("mcpServers", {})
+
+    if "state-hub" not in servers:
+        print("ERROR: 'state-hub' not found in ~/.claude.json. Run 'claude mcp add-json' first.")
+        raise SystemExit(1)
+
+    entry = servers["state-hub"]
+    cwd_str = str(STATE_HUB_DIR)
+
+    if entry.get("cwd") == cwd_str:
+        print(f"OK: cwd already set to {cwd_str}")
+        return
+
+    entry["cwd"] = cwd_str
+    CLAUDE_JSON.write_text(json.dumps(config, indent=2) + "\n")
+    print(f"Patched: ~/.claude.json state-hub.cwd = {cwd_str}")
+
+
+if __name__ == "__main__":
+    main()