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Cliff Hall
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2259b1a3e1 |
Tasks: io.modelcontextprotocol/tasks extension on modern servers (era fork) (#1731)
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* Tasks: modern io.modelcontextprotocol/tasks extension (era fork core) Core + test-server implementation of the SEP-2663 tasks extension for modern (2026-07-28) connections, forked from the legacy 2025-11-25 tasks path. SDK v2 removed all tasks support AND era-gates the tasks/* spec methods out of the modern era on both the client (outbound) and server (inbound) sides, and its codec rejects a resultType:"task" result outright. So the Inspector drives the extension itself: task creation rides tools/call (a modern method) with the resultType:"task" frame rewritten at the transport to a CallToolResult carrying the handle in _meta; tasks/get/update/cancel go over a raw-wire request channel that bypasses the era gate (full modern envelope, string ids, consumed by the transport). input_required tasks reuse the existing pending-request modal via fulfilInputRequests, answered with tasks/update. No tasks/list, no tasks/result. Tab + run-as-task gate on the negotiated extension; the managed task store's refresh re-polls known handles on modern (no server list). Test server serves the extension via an Express interceptor (SDK can't) + a shared poll-driven runtime. Full integration coverage of both eras. Refs #1631 Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01XNdjEPKLG637X8YmhDiEk5 * Tasks modern era: tests + coverage (raw-wire, schemas, era integration) Adds unit coverage for modernTaskSchemas and the raw-wire request channel (transport-null guard, send failure, timeout, error response, teardown), plus end-to-end era integration tests (create/poll/input-required/update/cancel, synchronous passthrough, unknown-id error, modern store re-poll). Fixes the App and constructor-capabilities tests for the always-on tasks extension. Refs #1631 Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01XNdjEPKLG637X8YmhDiEk5 * Tasks modern era: docs + share test servers per era to de-flake coverage Document the tasks era-fork test configs in README and the new core/test-server files in AGENTS.md. Share one modern + one legacy test server across the era integration block (started lazily, stopped in afterAll) — starting a fresh Express server per test made connection negotiation flaky under the heavy concurrent coverage run. Refs #1631 Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01XNdjEPKLG637X8YmhDiEk5 * Restore pr-screenshots deleted inadvertently The logging/subscriptions PR screenshots + README were staged-deleted in the working tree before this branch; restore them from v2/main so this PR doesn't remove other PRs' artifacts. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01XNdjEPKLG637X8YmhDiEk5 * Tasks modern era: offer Run-as-task for any tool + PR screenshots On modern (SEP-2663) task creation is server-directed — the client declares the extension once and any tool may return a task — so the Tools screen now offers 'Run as task' for every tool on a modern connection (threaded via a modernTasks prop through InspectorView → ToolsScreen → ToolDetailPanel), rather than gating on the legacy per-tool taskSupport. Verified end-to-end in the web UI (remote proxy): create → poll tasks/get → input_required elicitation → tasks/update → inline result, plus the unchanged legacy tasks/list/result flow. Adds proof screenshots. Refs #1631 Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01XNdjEPKLG637X8YmhDiEk5 * Tasks modern era: address two follow-ups (task-input note + ordinary-path auto-poll) 1. The pending-request note now distinguishes a modern task round from an MRTR round: a new 'task-input-required' PendingRequestOrigin threads through fulfilInputRequests → the pending-request modal → MrtrOriginNote, which shows 'submitted via a tasks/update request (SEP-2663), not a retry' instead of the MRTR retry copy. 2. The ordinary (non-run-as-task) modern callTool path now auto-polls an unsolicited task handle: attemptToolCall detects the rewritten handle in the result _meta and drives it to termination (get → input_required/update → inline result), dispatching task events so the Tasks tab + toasts track it and the tool result resolves to the task's final result. The poll loop is shared with the streaming path via extracted helpers (submitModernTaskInput / modernTaskTerminalOutcome / modernTaskPollInterval). Refs #1631 Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01XNdjEPKLG637X8YmhDiEk5 * Tasks modern era: address review (negotiated envelope version, input-round cap, clarifying comment) + fresh smoke screenshots Review of #1731: 1. withModernTaskEnvelope now stamps the NEGOTIATED protocol version (getProtocolVersion() ?? MODERN_PROTOCOL_VERSION) so the envelope matches the MCP-Protocol-Version header instead of a hardcoded constant. 2. A never-completing input_required task is now bounded by MRTR_MAX_ROUNDS in the shared submitModernTaskInput (threaded through both poll loops), so a non-conformant server can't re-prompt the user forever. New modern_loop_task test-server tool + integration test cover the cap. 3. ToolDetailPanel: comment clarifying that per-tool taskSupport:"forbidden" is deliberately ignored on modern (task creation is server-directed under SEP-2663). (The abort-during-poll observation is addressed in the PR reply: the cancel path uses tasks/cancel and disconnect rejects the in-flight raw request, so the poll stops; matches legacy.) Fresh web-UI smoke screenshots (modern connected, task completed, input_required with the corrected tasks/update note, input completed). Refs #1631 Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01XNdjEPKLG637X8YmhDiEk5 * Tasks modern era: fix uncancelable input-required loop + sticky cancel Two bug fixes reported during manual testing of the tasks era-fork (#1631): 1. A modern task paused at `input_required` (e.g. `modern_loop_task`, which never advances) could not be cancelled: the poll loop blocked on the pending-request modal, so `cancelRequestorTask` sent `tasks/cancel` but the modal kept re-prompting. Now each modern poll loop registers a per-task AbortController (`registerTaskInputAbort`), `cancelRequestorTask` aborts it to reject the pending elicitation and unblock the poll, and the embedded input requests are tagged with their owning task id (`RELATED_TASK_META_KEY`) so the pending-request UI's Cancel action cancels the TASK rather than sending a "cancel" answer the server would re-prompt on. 2. On the legacy server, cancelling a task briefly showed CANCELLED then flipped to COMPLETED when the in-flight tool call resolved. Cancellation is a deliberate terminal decision, so `ManagedRequestorTasksState` now remembers cancelled task ids and ignores any later non-cancelled status update. Also: move the compact task id onto its own line in the embedded monitoring sidebar so the status badge / Cancel Task control don't wrap; DRY the duplicated task poll-interval logic into a shared `taskPollInterval` helper. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01XNdjEPKLG637X8YmhDiEk5 * Refresh tasks PR screenshots + capture both bug-fix scenarios Recapture the five tasks flow screenshots against the current build and add two demonstrating the post-review fixes: modern_loop_task cancelled from the pending-request modal (uncancelable-loop fix) and a legacy task staying CANCELLED after the in-flight call resolves (sticky-cancel fix). Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01XNdjEPKLG637X8YmhDiEk5 * Address re-review: sticky cancel on legacy refresh + App cancel-routing test Re-review of the cancelable-loop / sticky-cancel fix raised two non-blocking hardening items: 1. The legacy tasks/list refresh() rebuilt the list from the server, honoring only dismissedTaskIds — so a cooperative-cancel server that re-lists a user-cancelled task as completed could un-stick the cancel on a manual Refresh. The refresh path now pins a cancelledTaskIds task to "cancelled" (keeping it visible-as-cancelled, matching the live-merge handlers) rather than dropping it. Covered by a new state test. 2. Added an App.test.tsx case locking in the user-facing half of the fix: Cancel on a task-input-required elicitation calls cancelRequestorTask (not respond). Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01XNdjEPKLG637X8YmhDiEk5 --------- Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com> |
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Cliff Hall
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9b2c188d11 |
MRTR: drive input_required manually to keep pending-request UX (#1704) (#1719)
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* MRTR: drive input_required manually to keep pending-request UX (#1704) Follow-up to #1627/#1705. Instead of letting the SDK auto-fulfil the modern (2026-07-28) MRTR retry loop, InspectorClient now drives it itself so the Inspector keeps its pending-request UX, owns the loop, and shows era-accurate semantics. Core (core/mcp/inspectorClient.ts): - Construct the SDK Client with `inputRequired: { autoFulfill: false }` (unconditional; a no-op on legacy, which never returns input_required). - New `requestWithInputRequired()` driver: issues the request with `allowInputRequired` + `withInputRequired(schema)`, and while the result is `input_required`, fulfils each embedded request through the SAME pending sampling/elicitation plumbing, then retries the original call with `inputResponses` + the echoed `requestState` on a fresh id, bounded by MRTR_MAX_ROUNDS. - Route tools/call, prompts/get, and resources/read through the driver. - Embedded roots/list is auto-answered from configured roots (no pending UX); decline/cancel is echoed to the server (not treated as an abort); a tool-call abort mid-round settles the pending request and surfaces ToolCallCancelledError. - Extract shared `enqueuePendingSample`/`enqueuePendingElicitation` helpers used by both the legacy inbound handlers and the driver; add a per-request `origin` ("server-request" | "input-required") to the pending wrappers. Web UI: - New `MrtrOriginNote` element shows an "input_required — your answer returns as a retry" note on a modern MRTR round; legacy panels are unchanged. - Thread `origin` App -> PendingClientRequestModal -> the sampling/elicitation panels (and the inline panels). Test servers: new MRTR presets (multi-round, roots, sampling, loop, edge-case param shaping). Integration tests cover the manual round-trip (asserting the pending UI pauses and the retry carries inputResponses + requestState on a new id), multi-round, roots auto-answer, sampling, decline-echoed, maxRounds bound, abort mid-round, and requestState-only/inputRequests-only param shaping. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01XNdjEPKLG637X8YmhDiEk5 * Review: clarify sampling-reject and between-rounds abort comments (#1704) Address review nits on PR #1719 (comment-only, no behavior change): - enqueuePendingSample docstring: sampling has no decline/cancel action; the panel either sends a result (resolve) or Rejects (reject → fails the call). The shared "declined/cancelled resolves" wording was accurate only for the elicitation case. - callToolWithRetries abort comment: note the between-rounds case — when the abort lands while an MRTR round awaits an embedded pending request there is no in-flight SDK request, so nothing is sent on the wire; the outcome (ToolCallCancelledError, no failed-call record) is identical. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01XNdjEPKLG637X8YmhDiEk5 * test-servers: add mrtr-showcase config exercising every MRTR preset (#1704) A single modern-era streamable-HTTP server (port 3111) bundling all six MRTR presets — mrtr_confirm, mrtr_two_step, mrtr_sample, mrtr_roots, mrtr_edge, mrtr_loop — for manual testing of the manual-driving pending-request UX across single-round, multi-round, sampling, roots, param-shaping, and maxRounds paths. Document it in the README alongside modern-mrtr-http.json. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01XNdjEPKLG637X8YmhDiEk5 --------- Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com> |
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