Fixes cross-host graph rendering and moves widget uploads off the JSON/base64 tool transport.
- render graph data from the launcher result without a second tool call
- stream multipart uploads through one-time, short-lived upload sessions
- remove temporary widget diagnostics and redundant unit tests
Tested with Biome, TypeScript, 17 unit tests, a Wrangler deployment dry-run, and live graph rendering in ChatGPT and Claude. Authenticated E2E setup is currently blocked by the saved OAuth refresh session returning `invalid_grant: session not found`.
Fixes MCP app submission metadata and makes widget delivery consistent across hosts.
- content-hash widget resources and set the production widget domain
- add typed structured outputs to direct tools and scope default-space calls
- keep graph rendering compatible with both initial results and app-side loading
Tested with `bun run check-types` and `bun run test:unit` (42 tests).
ChatGPT can omit nullable nested fields from structured tool results and does not reliably expose result metadata to MCP Apps. Keep graph data in `structuredContent`, tolerate missing document titles, and bundle React inside the widget so the graph renders consistently across hosts.
- use the deployable `app-v4` resource URI
- keep the graph response and widget schema aligned
- remove the `esm.sh` runtime dependency
Tested with typecheck, 42 unit tests, production widget build, 36 branch-local authenticated E2E tests, and a live ChatGPT graph render.
Moves MCP App results onto explicit runtime schemas so hosts can distinguish model-visible output from widget-only graph data.
- advertises output schemas for structured tools
- validates API, session, and widget boundaries instead of asserting response types
- marks additive app writes as non-destructive and removes redundant widget typing
Verified with MCP typecheck, 42 unit tests, and the production widget build. Claude Desktop host validation is in progress against a temporary tunnel.
