connectionTimeout defaulted to 0, which InspectorClient.connect() read as
"no bound at all" — so out of the box nothing the Inspector owns bounded a
connect attempt, and the only thing ending a hung handshake was the SDK's
60 s per-request timeout on initialize, reporting "Request timed out".
- Add DEFAULT_CONNECTION_TIMEOUT_MS (30000) to core/mcp/types.ts. An absent
value resolves to it on the client, on disk read, in the web form draft,
and in the CLI's header-only settings shell. An explicit 0 keeps its
documented meaning (no timeout; --connect-timeout 0) and is now persisted
so the opt-out round-trips; the default is the omit-sentinel, as for
taskTtl.
- Key the post-timeout transport teardown to the timer actually firing, not
to connectionTimeout > 0 — otherwise a non-zero default would tear down
every failed connect, including a recoverable 401 whose transport the
auth recovery holds open.
- The timeout message names the bound and where to raise it: "Connection
timed out after N ms. To accommodate a slower server, you may increase
the timeout value in Server Settings."
- The CLI's UNREACHABLE classifier now matches that message.
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01M4h8Xa6Ed9zwtv5ojX35MT
Signed-off-by: cliffhall <cliff@futurescale.com>
Copilot review round 7.
- Add `contentSchema` to the traversal. It holds the schema the decoded
string content must satisfy, so a bare `true` or a remote `$ref` under
it is a real finding all three clients were walking past. Also admit
the three content keywords to `CONSTRAINING_KEYWORDS` on the same
documented grounds as `format` — annotation-only by vocabulary, but
plainly an attempt to constrain, so reporting such a schema as
accepting anything would be noise. The comment now names that
category rather than singling `format` out.
- Make `handleError` async and await the envelope write. Round 6 made
the `--strict` report await its write and stopped one line short: the
envelope emitted for the very same throw still raced `process.exit()`,
so the machine-readable line a CI caller parses could be lost on a
pipe. The launcher's comment claiming the envelope was "well inside
the pipe buffer" was wrong reasoning and is replaced — fitting in the
buffer says nothing about whether the write was performed. Its call
site now awaits; the bin's `.catch(handleError)` needed no change.
- The CLI README called its sample block the "complete output" when the
error envelope follows it on every non-zero exit. Now scoped to "the
complete report", with the envelope named and linked.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01UL9retfvAXRgvi6EWk4SY4
Signed-off-by: cliffhall <cliff@futurescale.com>
Copilot review round 4.
- Add `SCHEMA_UNPORTABLE` to `codeForExit`. `CliExitCodeError` lets a
caller omit the envelope, so without the case an envelope-less throw
reported the generic `error` — the same silent mislabelling the rename
was meant to prevent, one layer down. Covered via the envelope-less
construction that exposed it.
- Keep a local `type` (and the preset's `required`) alongside the remote
`$ref` in the showcase config. The TUI's `schemaToForm` dispatches on
`type`, so a `$ref`-only property fell through to a string field that
`add`'s numeric handler then rejected — making the README's "every
showcase tool is runnable" claim false there. The `remote-ref` finding
is unaffected, since that rule reads `$ref` independently.
- Restrict `type-union` to well-formed unions: non-empty, unique, and
all recognized JSON Schema type names. Its message asserts the
construct is *legal* JSON Schema, which is false for `[]`, `[3]` or
`["bananas"]`, and the `anyOf` it suggested for those would be invalid
too. Malformed schemas stay the SDK parser's business.
- Drop `if`/`then`/`else` from the presence-only allowlist. They only
constrain as a pair, so `{"if": {"const": 1}}` accepts every value and
was evading `untyped-schema`; the pairing is now checked explicitly.
- Distinguish the web sidebar severities by SHAPE, not just colour — a
circle for an error, a triangle for a warning — and name the severity
in the tooltip. Colour alone left a colour-blind reader unable to tell
them apart.
- Fix the stale "across 2 tools" count in the CLI README's hint sample.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01UL9retfvAXRgvi6EWk4SY4
Signed-off-by: cliffhall <cliff@futurescale.com>
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>
Address @claude review of #1583:
- statusOf() now only treats a numeric `.code` as an HTTP status when it
is in the 100-599 range, so an MCP SDK McpError JSON-RPC code (e.g.
-32601 MethodNotFound) is no longer leaked into the envelope `status`
or misclassified as AUTH_REQUIRED (it falls back to USAGE).
- causeOf() now carries a depth cap (MAX_CAUSE_DEPTH) so a cyclic/
self-referential `error.cause` chain terminates instead of recursing
infinitely.
- Add tests for both: a -32601 McpError-shaped error (status undefined,
exit USAGE) and a self-referential cause chain (finite string).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01S3fTN8H3R8YV4yUGvZjYnX
Give the CLI a stable machine-readable failure surface:
- EXIT_CODES map (0 ok / 1 usage / 2 no-app / 3 auth-required /
4 unreachable / 5 tool-error)
- ErrorEnvelope interface + CliExitCodeError for pre-classified exits
- pure classifyError() (status/cause/pattern heuristics) and
formatErrorOutput()/handleError() that emit one JSON line on stderr
- in-process cli-runner mirrors the binary via formatErrorOutput so tests
observe the real exit code and envelope
- document the exit-code map + envelope shape in clients/cli/README.md
Wave 1 foundation of the PR #1510 decomposition; shapes kept clean for
reuse by --app-info (exit 2), stored-auth (exit 3), and --format json.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01S3fTN8H3R8YV4yUGvZjYnX
* test(cli,tui): add in-process source coverage gates (#1484)
CLI and TUI source had no coverage gate: CLI tests spawned the built
binary out-of-process (coverage never saw clients/cli/src) and the TUI
had only two smoke tests. Regressions there were invisible to CI.
CLI:
- Rewrite __tests__/helpers/cli-runner.ts to invoke runCli() in-process
(capture process.std*.write, map thrown errors to an exit code),
preserving the CliResult shape so all existing tests run unchanged and
clients/cli/src is now measured under v8 instrumentation.
- cli.ts: program.exitOverride() so a commander usage error throws
(catchable in-process) instead of tearing down the worker; --help /
--version still exit cleanly. Drop the dead, never-imported main().
- Add a thin out-of-process e2e.test.ts that spawns the built binary for
the shebang / process.exit paths the in-process runner can't reach.
- Add @vitest/coverage-v8, a per-file gate (90/85/80/50) excluding only
src/index.ts (binary bootstrap), and pool: 'forks' for capture
isolation. cli.ts lands at ~98% lines / 100% functions.
TUI:
- Add @vitest/coverage-v8 and an interim per-file gate over the
non-React logic (logger.ts, components/tabsConfig.ts, utils/*); the
Ink components, App.tsx, and hooks/ are excluded with a documented
follow-up (#1501). Add tests covering the included modules (100%).
Wiring + docs:
- CI runs each client's test:coverage; root test:cli / test:tui (used by
validate) and root test:coverage now enforce the gates.
- gitignore clients/**/coverage; update AGENTS.md and client READMEs.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
* docs(cli): clarify in-process runner footguns from PR #1502 review
Review notes on the in-process CLI test runner (no behavior change):
- Warn in runCli's docblock that --help/--version must NOT go through the
in-process runner: exitOverride only re-throws non-zero exits, so exitCode
0 falls through to process.exit(0) and would kill the vitest worker. Those
belong in the out-of-process e2e.test.ts layer.
- Document that a timeout orphans the uncancellable invokeCli promise (its
stdio subprocess stays alive; later writes hit the restored stdout) — a
known, acceptable trade-off on the hang-only failure path.
- Fix a stale reference to the removed main() (errors now route through
index.ts).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
* docs(cli): fix remaining stale main() reference in vitest exclusion comment
PR #1502 re-review caught a second stale `main()` mention (the first was
fixed in 52c23e41). src/index.ts inlines the bootstrap as
runCli(process.argv).then(...).catch(handleError) — there is no main().
Comment-only; no behavior change.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
* chore: compose root test:coverage from per-client scripts
Replace the brittle inline cd-chain with a composition of the existing
test:cli / test:tui scripts plus a new matching test:web. Behavior is
unchanged (web → cli → tui coverage gates) but there's a single source of
truth for each client's coverage invocation.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
---------
Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
