Migrate all three clients + core + test-servers from
@modelcontextprotocol/sdk@1.29 to SDK v2 (2.0.0-beta.4), keeping behavior
identical against legacy (2025-11-25) servers. Foundation for the SDK V2 +
New Spec stack.
Packages
- Split @modelcontextprotocol/sdk -> @modelcontextprotocol/client (Client,
transports, OAuth, error taxonomy, protocol types) + core (Zod schemas);
stdio -> client/stdio, Ajv -> client/validators/ajv. Test-servers ->
@modelcontextprotocol/server (+ server-legacy/sse). Deterministic import
rewrite (schemas -> core, everything else -> client); the codemod misroutes
client code to /server so it was not used for path routing.
- new Client(..., { versionNegotiation: { mode: 'legacy' } }) — nothing
2026-era goes on the wire.
Runtime (core/mcp/inspectorClient.ts)
- Error taxonomy: McpError -> ProtocolError, ErrorCode -> ProtocolErrorCode;
RequestTimeout -> SdkError/SdkErrorCode.
- Handlers take method strings; task methods (tasks/*, notifications/tasks/*)
use the 3-arg custom form (excluded from v2's spec-method set).
- Legacy tasks kept working (per project requirement): requestor tasks re-
implemented over raw client.request + explicit deprecated schemas;
experimental.tasks.callToolStream replaced by a local pollTaskToolCall
async generator (with _progressHandlers revival so task-execution progress
still reaches the caller). Receiver (server-initiated) tasks: the v2 Client
validates a sampling/elicit handler result and rejects the legacy { task }
response with -32602 — installReceiverTaskResponseBypass swaps the wrapped
entry in the private _requestHandlers map for the task-augmented branch so
{ task } reaches the wire (fixes server-initiated sampling-via-task).
- Pagination: list verbs use raw client.request({method}, List*ResultSchema)
for single-page behavior (v2's client.listX() auto-aggregate all pages).
Web / auth / apps
- Rename local JsonSchemaType -> InspectorFormSchema + add toFormSchema()
structural narrowing at the SDK-schema -> form boundary.
- ext-apps still peers on SDK v1: one compat boundary with documented casts
(remove when ext-apps#702 lands a v2 peer).
- OAuth provider saveClientInformation reconciled with v2's
OAuthClientInformationContext; InvalidClientMetadataError re-homed as a
local class (server-legacy/auth is not browser-safe).
- vitest.shared.mts dedupes @modelcontextprotocol/client+core to one copy so
vi.mock intercepts the SUT's import.
Accepted v2 behavior changes (per #1624 / spec §9.2): unknown-tool call
rejects with -32602; cancellation is stream-abort (no guaranteed
notifications/cancelled frame); output-schema strictness restored via the
Inspector's own Ajv check on the default path.
npm run ci green: validate (web 3087 / cli 212 / tui 274 / launcher 5),
coverage (>=90 per-file, all clients), smoke (launcher/cli/web), storybook
(410).
Closes#1624
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
* test(tui): cover useSelectableList hook + leaf Ink components (#1501)
Add ink-testing-library and renderer-based tests for useSelectableList,
SelectableItem, and Tabs. Widen the vitest include glob to .test.tsx and
lift these files from the interim React-surface coverage exclusion. The
blanket src/components/**/*.tsx exclude is expanded into an explicit
per-file list so remaining components can be lifted incrementally.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
* test(tui): add ink-scroll-view passthrough mock for renderer tests (#1501)
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
* test(tui): add ink-form passthrough mock for modal renderer tests (#1501)
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
* test(tui): cover all Ink tab + modal components via renderer tests (#1501)
Add ink-testing-library tests for the 12 Ink components (InfoTab, AuthTab,
ResourcesTab, PromptsTab, ToolsTab, NotificationsTab, HistoryTab,
RequestsTab, and the Tool/Resource/Prompt test modals + DetailsModal),
mounting them through the ink-scroll-view / ink-form passthrough doubles
and driving keypresses via stdin. Modal components render position:absolute
(empty frame under the test renderer) so their tests assert on behavior —
injected InspectorClient fakes and onClose — while the passthrough
ScrollView still mounts the inner JSX for coverage.
Lift these 12 components from the interim React-surface exclusion in
vitest.config.ts; only App.tsx remains excluded. All files clear the
uniform 90/90/90/90 per-file gate.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
* test(tui): add App.tsx renderer-test harness + foundation tests (#1501)
Mock the full @inspector/core surface (InspectorClient, the 7 managed-state
classes, the 8 react hooks, transport + auth) behind a controllable harness,
plus the ink-scroll-view/ink-form passthroughs, so App renders under
ink-testing-library and its keyboard state machine can be driven via stdin.
Concurrent ink mounts share raw-mode stdin, so each render is unmounted in
afterEach. Foundation covers server-list nav, tab accelerators, connect/
disconnect, OAuth-tab gating, and connected-status rendering (~50% baseline).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
* test(tui): cover App.tsx via mocked-core renderer tests; lift final exclusion (#1501)
Extend App.test.tsx to 67 tests driving the keyboard state machine, tab
content, modals, OAuth flows, and connect/disconnect across the controllable
@inspector/core mock. App.tsx now clears the 90/90/90/90 per-file gate
(94.6/90.6/94.5/96.6).
Remove the last React-surface exclusion (src/App.tsx) from
clients/tui/vitest.config.ts. The whole clients/tui/src tree is now under
the uniform per-file coverage gate with no React-surface exclusions,
completing the interim-scope lift from #1484.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
* test(tui): raise stdout max-listeners in App test to silence warning (#1501)
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
* test(tui): raise App.tsx branch coverage >90 and de-flake coverage runs (#1501)
Add targeted App.tsx tests for the OAuth handlers' non-Error throw arms
(quick onCallback, guided start/advance, run-to-completion) and a re-entrant
quick-auth guard, lifting App.tsx branch coverage 90.6% -> 91.48% for a
safer margin above the 90 gate.
Harden the App renderer tests against the heavier v8 coverage instrumentation,
where React+ink's multi-macrotask render scheduling races fixed ticks:
- press() now settles two ticks per key so focus/tab changes flush before the
next key is routed (ink re-subscribes useInput on re-render);
- expectFrame()/waitUntil() poll for frame content and async flow state
(callbackServer opts) instead of asserting after a single fixed tick;
- ResourcesTab's content-clear test polls for fetched content likewise.
Plain 'npm test' (the CI path) was already stable; this makes the local
coverage gate stable too (13/13 clean runs vs ~2/8 flaky before).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
* test(tui): de-flake component renderer tests under slow CI (#1501)
CI flaked on AuthTab's 'renders quick auth results' under the plain test run:
its oauthFlowState is populated by a post-mount useEffect reading the
inspectorClient, and a single-macrotask tick can race that effect -> setState
-> re-render chain on a slow/loaded CI runner.
Make each component test file's tick() flush several macrotask cycles so such
chains settle deterministically before assertions (no test relies on precise
tick timing — no fake timers / debounce). App.test.tsx already polls via
expectFrame/waitUntil and passed CI, so it's unchanged.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
* test(tui): address review — shared setupFile for max-listeners, consume-once ink-form global (#1501)
Review follow-ups on #1538 (both non-blocking cleanups):
- Hoist process.std{out,in}.setMaxListeners into a shared vitest setupFile
(__tests__/setup.ts) wired via setupFiles, so every renderer test file
inherits it and the MaxListenersExceededWarning is silenced across the
whole suite — not just App.test.tsx. Remove the per-file call.
- Make the ink-form double consume (clear) __INK_FORM_SUBMIT_VALUE__ on
submit, eliminating the latent cross-test coupling on the shared global
regardless of how the modal test files are organized.
No production code changed; suite + coverage gate stay green (App.tsx
94.8/91.5/94.5/96.6), and the warning no longer prints.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
---------
Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
cliffhall