feat: share the tool catalog with voice

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Sameh Khamis committed 2026-10-01 13:52:36 -07:00
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# Tools and the MCP server
Tools answer questions from God's Eye View data for language-model clients.
They are defined once and exposed through adapters; the Model Context Protocol
(MCP) is the first.
They are defined once and exposed through adapters: the Model Context Protocol
(MCP) and function calling, which voice uses.
## Layers
@@ -11,13 +11,17 @@ They are defined once and exposed through adapters; the Model Context Protocol
| `src/tools/` | Tool definitions, catalog composition, argument validation, shared `area` and result helpers |
| `src/tools/queries/` | Queries, one file per domain, reading only portable source contracts |
| `src/tools/mcp/` | MCP protocol (JSON-RPC) and a stateless HTTP transport; knows the catalog interface, not queries |
| `src/tools/functions.js` | Function-calling adapter: tool records and results for function-calling clients |
| `src/tools/services.js` | The default services: the layers' source factories and request services, given a resolving fetch |
| `server/mcp/` | Node composition: points the sources at a running app's `/api` routes; serves stdio and `/mcp` |
| `server/standalone/voiceTools.js`, `src/standalone/toolCatalog.js` | Standalone voice composition: the session's tool list and the browser catalog |
Dependencies point downward only. `gods-eye-view/tools` and
`gods-eye-view/tools/mcp` are portable exports: they reach no application,
rendering, Node, Cesium or browser-global code, which
`npm run check:boundaries` enforces. Nothing in the application imports them.
`npm run check:boundaries` enforces. In the application, only voice reaches
them: `withToolCatalog` in `src/voice/gevRealtime.js` imports the
function-calling adapter, and the standalone entry supplies the catalog.
## Definitions and composition
@@ -77,6 +81,27 @@ returns a `Request`-to-`Response` handler for stateless Streamable HTTP: one
JSON-RPC message per POST, answered with JSON. The host owns routing and any
access control in front of it.
## Voice
Voice offers the catalog's queries next to its app actions.
`toFunctionTools(tools, { exclude })` turns tools into
`{ type: 'function', name, description, parameters }` records, and
`toFunctionOutput(name, result)` turns a result into
`{ ok, tool, summary, data }`, counting images in `images_omitted` instead of
sending them.
The voice session token endpoint takes its tool list as `realtime.tools`.
`realtimeSessionTools(additional)` appends function tools to the app actions,
skipping names an action already uses, so `next_satellite_pass` stays the
action. The standalone server supplies every core query except
`open_in_gods_eye_view`, since voice runs inside the app.
In the browser, `initGevVoiceCommands({ toolCatalog })` takes a function that
resolves a catalog. App action names go to the action runner; other names the
catalog has go to `catalog.call` with the call's abort signal. The standalone
entry composes the catalog with `createToolServices` over the page's fetch and
loads it the first time voice calls a query.
## Running locally
Start the app (`npm run dev` or `npm run preview`), then register the stdio