Fixesbilawalsidhu/gods-eye-view#927. Each stdio MCP server made its own
random panel key, and panel_request accepts only the key in the panel
page. A client that starts two server processes for one connection and
reads the page from one while sending the page's requests to the other
(seen in Claude Desktop on Windows) therefore always got "Only the God's
Eye View panel may make this request".
The stdio entry now passes a key shared by the install, created once in
.gev-cache/mcp-panel-key. The file is staged 0600 and published with
link(), so processes starting together agree on one key and never read a
half-written one. If it cannot be stored, the process keeps a key of its
own, as before. createLocalMcpServer still makes a fresh key unless given
one, so in-process servers (the /mcp HTTP plugin, tests) are unchanged.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
Panels on one MCP server share six requests in flight; further requests
wait their turn (up to 256 waiting) instead of failing, and a waiting
request leaves the queue when its caller cancels. Held responses belong to
their own MCP server rather than to the process. /mcp request bodies must
arrive within 30 seconds. Over stdio, a client's notifications/cancelled
aborts the named request, which then gets no response.
Co-Authored-By: Claude Opus 5.5 (1M context) <[email protected]>
The stdio server writes each request's method, and the tool or resource it
names, to stderr, which clients such as Claude Desktop copy into their logs.
Arguments and results are never logged.
Define tools that answer questions from the app's data once, independent
of the surface that exposes them. A tool declares its arguments and the
services it reads; applications compose tools with their own services and
optional call interceptors. Queries reuse the layers' portable source
factories, so they run wherever an application routes /api requests.
The first queries are get_earthquakes, get_active_fires and
get_recent_launches, with a shared area argument (place name, bounding
box, or point and radius) and capped lists.
gods-eye-view/tools/mcp adapts a catalog to the Model Context Protocol
with a small JSON-RPC handler and a stateless HTTP transport, adding no
dependencies. npm run mcp serves Core's tools over stdio to local clients
such as Claude Code, reading from a running app. Both exports are
portable and checked by check:boundaries; the app does not import them.
