- The loopback MCP server moves from Director into libs/ai/services (mcp::server); Director re-exports it, its lane tokens and tests unchanged. The dispatcher now names the server and its instructions; a TokenStore can live in memory only (ephemeral).
- mcp::host: while Claude Desktop is the provider the panel serves its registry's tools (service__tool names) on an ephemeral 127.0.0.1 port with a fresh bearer token, and writes ~/.makepad/mcp/<exe-stem>.json {pid, port, token, title} (0600 in a 0700 dir), removed when the provider changes or the panel goes. Calls queue to the UI thread and run through EngineCore::call_external: a card in the transcript, destructive calls held for the person's confirm (the pane opens for it), the result sent back when the card lands.
- mcp::mcpb: "Connect to Claude Desktop" writes <exe-stem>.mcpb (a stored zip, manifest_version 0.3, binary server = this executable with --mcp) and opens it so Claude Desktop shows its install dialog.
- platform mcp_relay: `<app> --mcp`, checked first in app_main before any Cx, window, GPU or audio, relays newline JSON-RPC on stdio to the running app's endpoint. It answers initialize/ping itself and tools/list from the app's last list while the app is down, starts the app (detached, MAKEPAD_AI_PROVIDER=claude-desktop, engine up with the pane closed) on the first call that needs it, waits up to 20 s for its file, and exits when stdin closes.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Squash of 8 work commits (Sep 2–10):
7b9ed2c aichat: the assistant as an app — the panel owns the engine, the bus client, settings with the local-only lock
e0c6e74 aichat: the progress bar and system lines use the theme's highlight colour
8b46ce0 aichat: the composer's hint is a dark grey Ask AI, not the typed colour
b99a631 toml_parser, rust_tokenizer: rewrite both for the code analyser
3bbcea2 aichat: add Studio evaluation-feedback widget
b61845f studio: Architecture view, the third workspace mode
d7a76cf studio: add bounded code context and source APIs
524142a Split Studio into makepad director (public) and makepad scope (private)
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
