* fix: send HTTP DELETE to terminate server sessions after each scenario
The conformance test harness opened sessions against servers under test but never issued an HTTP DELETE to terminate them, leaving a dangling session on the server after each scenario.
This violates the "hermetic" expectation called out in the Streamable HTTP transport spec.
- `connection/sdk-client.connectToServer` now calls `transport.terminateSession()` before `client.close()`. A 405 response (DELETE not supported) is tolerated because the spec allows the server to refuse.
- A new `terminateSessionRaw` helper handles scenarios that bypass the SDK client and open sessions via raw `fetch` (`lifecycle.ts`, `http-standard-headers.ts`).
- `sse-polling.ts` and `sse-multiple-streams.ts`, which manage their own transport, now terminate the session in their existing `finally` block before closing the client.
- `lifecycle.test.ts` gains two cases asserting that DELETE is sent with the issued session ID and that no DELETE is sent when the server did not assign one.
Verified manually against `examples/servers/typescript/everything-server.ts` that running a server scenario now causes the server to log `Received session termination request for session <id>`.
Fixes#79
Signed-off-by: Satoshi Ito <satoshi.ito.tf@hitachi.com>
* Use negotiated protocol version for teardown DELETE and bound it
Review follow-ups on the session-termination change:
- terminateSessionRaw: abort the DELETE after 5s so a wedged server
cannot stall suite teardown.
- terminateSessionBestEffort: shared SDK-path teardown helper that
delegates to terminateSessionRaw with the transport's negotiated
protocol version, so the socket is truly released at the bound and
the version-mismatch 400 on strict servers (the failure mode of
issue #79) goes away. Used by connectToServer close() and both SSE
scenarios, replacing their inline try/catch blocks.
- lifecycle.ts: the raw session-id probe and its teardown DELETE now
use ctx.specVersion instead of a hardcoded 2025-11-25, matching the
negotiated-version convention from #415/#416.
- Add sdk-client.test.ts regression tests asserting close() sends a
DELETE with the issued session ID (and none without one), so a bad
future merge cannot silently drop the fix.
---------
Signed-off-by: Satoshi Ito <satoshi.ito.tf@hitachi.com>
Co-authored-by: Paul Carleton <paulc@anthropic.com>
c5af5673ba