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feat(core): support MCP events in the MCP client - #63254
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Co-authored-by: Adam <2363879+adamdotdevin@users.noreply.github.com>
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The change looks sound. The PR's new tests pass consistently (mcp-events.test.ts 7/7 on 8 runs; the new mcp.test.ts cases pass), and tsc -b passes in packages/core. The one mcp.test.ts failure (MCP descendants termination) also fails on the base branch. I also checked that events are buffered without a size limit, so none are dropped, that the 60s idle timeout resets on each message rather than capping the whole stream, and that the pool key keeps connections with and without the flag apart.
Public API: adds the mcp_events boolean flag to the config schema, the OpenAPI spec and the generated client types (backwards compatible, off by default). Other additions (Connection.events, Mcp.Service.events, the onRequestId SDK option) are internal to core.
One small point: a possible flake in the idle-timeout test (inline).
Related: #48855
| ) | ||
| yield* until(() => server.state.streams.length === 1) | ||
| const id = server.state.streams[0].id | ||
| const settle = Effect.promise(() => Bun.sleep(5)) |
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This waits a fixed 5 ms of real time so the heartbeat is handled before the next 59-second clock jump. On a loaded CI runner the heartbeat might not be handled in time, and the idle timeout would then fire early. It was stable here over 8 runs. Waiting for the heartbeat to actually arrive (for example by tapping the stream and using until(() => seen.length === 1)) would avoid relying on the 5 ms.
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The new commit only rewords comments in script/upgrade-mcp-sdk.ts. Nothing new to raise. The earlier point about the fixed 5 ms real-time sleep in the idle-timeout test is still open. Public API impact is as before: it adds the mcp_events config flag (backwards compatible, off by default).
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The idle-timeout test now waits for the heartbeat to be received instead of a fixed 5 ms sleep, which resolves my earlier point. It passed 7/7 on 5 runs in a row, and tsc -b passes. Nothing new to raise. Public API impact is as before: it adds the mcp_events config flag (backwards compatible, off by default).
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The new commit only adds "experimental" wording to doc comments and to the mcp_events flag description; behaviour is unchanged. Nothing new to raise. The idle-test sleep point was fixed in the previous push. Public API impact is as before: it adds the mcp_events config flag (backwards compatible, off by default).
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* chore(site): remove the unused arcade sound library from the media manifest (anomalyco#62611) * fix(site): bring the latest site fixes from the new-website workshop (anomalyco#62613) Co-authored-by: Adam <2363879+adamdotdevin@users.noreply.github.com> * feat(data): switch the mono font to OpenTUI Mono (anomalyco#62623) * feat(site): add the shared product and logo menus to every nav (anomalyco#62654) Co-authored-by: Adam <2363879+adamdotdevin@users.noreply.github.com> * fix(data): keep native light-dark() so the shared nav menus get their colours (anomalyco#62660) * feat(core): wake sessions on Console event watches (anomalyco#62662) * fix(site): match the product chevron to the docs chevron (anomalyco#62665) Co-authored-by: Adam <2363879+adamdotdevin@users.noreply.github.com> * fix(site): stop the page dimming when a product card opens (anomalyco#62622) * perf(core): fetch Console instructions and skills concurrently (anomalyco#62672) * docs: antivirus HTTPS scanning and W-9 tax 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changed in credential.updated (anomalyco#62762) * chore(perf): bench with strobe 0.23.0 (anomalyco#62799) * chore: let bun resolve strobe's Windows on Arm package (anomalyco#62804) * feat(core): tag shell, tool and model-stream spans with session, agent and command (anomalyco#62806) * fix(server): stop waiting for plugins in request handlers (anomalyco#62796) * fix(core): refresh the Copilot API endpoint with the model list (anomalyco#62171) Co-authored-by: exe.dev user <exedev@anton.exe.xyz> * feat(ai): support predicate criteria in decisions (anomalyco#62819) * fix(core): stop retrying ChatGPT workspace usage limits (anomalyco#62823) * feat(acp): support _session/steering (anomalyco#54394) Co-authored-by: Dan Smolsky <dannysmo@gmail.com> * docs: document cache.ttl and per-model cache.warming (anomalyco#62829) * fix(core): stop applying well-known remote config after logout (anomalyco#62760) Co-authored-by: 2SinceJuly <202121119+2SinceJuly@users.noreply.github.com> * fix(core): refresh MCP OAuth tokens under the shared credential lock (anomalyco#62827) * refactor(core): run GitHub Copilot on native ai protocols (anomalyco#62034) Co-authored-by: exe.dev user <exedev@anton.exe.xyz> * fix(app): drop the dead plugin-boot retry on catalog syncs (anomalyco#62830) * docs(go): add LongCat 2.5 Free to Free and Go (anomalyco#62878) Co-authored-by: Jack <jack@anoma.ly> * refactor(tui): remove the import cycle in plugin (anomalyco#62884) * refactor(core): remove the import cycle in v1 migration (anomalyco#62885) * refactor(codemode): remove the import cycle in interpreter (anomalyco#62886) * docs(console): lower Claude Sonnet 5.5 cached read price to $0.10 (anomalyco#62887) * feat(app): mark sessions read or unread from their menus (anomalyco#62889) * fix(session-ui): show the picked question answer as a raised card (anomalyco#62896) * chore(perf): bench with strobe 0.24.0 (anomalyco#62895) * feat(core): return usage from session generate (anomalyco#62835) * fix(tui): use keyboard-navigable buttons in update and confirm dialogs (anomalyco#62906) * fix(ui): remove focus form borderless inline input while editing (anomalyco#62919) * fix(ui): keep selects, menus, tooltips and toasts reachable from a dialog (anomalyco#62913) * fix(ui): list types before import in packed exports and export select.css (anomalyco#62914) * chore(infra): drop stripe and aws from deploy, move share to its own worker (anomalyco#62908) * fix(site): align Copy as Markdown with the end of the docs page footer (anomalyco#62933) * chore(infra): drop SiteDomain and retain zen buckets and trust dns before untracking (anomalyco#62938) * docs(console): add Muse Ember 1.0 (anomalyco#62935) Co-authored-by: Daniel <daniel@anoma.ly> * fix(core): hold Console watch wakes after 5 in 10 minutes or 20 since the prompt (anomalyco#62924) * fix(tui): use the base text color for the dialog search cursor (anomalyco#62939) * chore(infra): untrack zen buckets and trust dns now that they are retained (anomalyco#62940) * fix(tui): drop usage and the model detail line from the model picker (anomalyco#62927) * fix(tui): remove dark gap between execute detail and its footer (anomalyco#62928) * fix(tui): add a blank row under the OAuth dialog title (anomalyco#62929) * fix(tui): give the shell output dialog new-design footer actions (anomalyco#62932) * docs(console): add Claude Fable 5.2 (anomalyco#62949) Co-authored-by: Daniel <daniel@anoma.ly> * fix(core): time warming from the model's cache.ttl by default (anomalyco#62831) Co-authored-by: Ryan Skidmore <4580448+ryanskidmore@users.noreply.github.com> * chore(perf): bench with strobe 0.26.0 (anomalyco#62931) * feat(app): close side panel tabs to the right and make ⌘W/⌘⇧T side-panel aware (anomalyco#62922) * ci: read deploy and release secrets from aws secrets manager (anomalyco#62954) * fix(perf): type navigation.bench.ts's setup key on its target (anomalyco#62952) * fix(core): stop warming a session after a ping misses the cache (anomalyco#62926) Co-authored-by: Ryan Skidmore <4580448+ryanskidmore@users.noreply.github.com> * fix(core): count the warming interval from when the request was sent (anomalyco#62941) * fix(site): keep open menus under the pinned header (anomalyco#62968) * docs: match Gemini Flash intro pricing on Console models (anomalyco#62937) Co-authored-by: Frank <frank@anoma.ly> * docs(console): deprecate Crouton Alpha Free (anomalyco#62975) Co-authored-by: Daniel <daniel@anoma.ly> * fix(site): fetch the docs' status bars from a 79-byte endpoint when the footer comes near (anomalyco#62962) * fix(site): stop idle polling and scroll layout thrashing (anomalyco#62966) * fix(files): cache the site's media for a year (anomalyco#62980) * fix(site): flatten masked logo SVGs so they render sharp (anomalyco#62946) * refactor(site): keep dev-only code out of production pages and group small shared chunks (anomalyco#62964) * fix(site): load the nav menus, console API and Hex pop-up on intent (anomalyco#62965) * fix(site): serve AV1/HEVC card videos and load card media after the page (anomalyco#62971) * refactor(core): give each warmed session one owned loop (anomalyco#62972) * chore(perf): bench with strobe 0.27.0 (anomalyco#62985) * refactor(site): parameterize src/docs for multiple docs sets (anomalyco#62950) * feat(site): serve V1 docs in the new design at /v1/docs (anomalyco#62951) * feat(site): translate the V1 docs' chrome and missing pages (anomalyco#62956) * feat(app): keep assistant copy visible on dev builds (anomalyco#62992) * chore(core): update MCP SDK to 2.4.0 (anomalyco#62982) * refactor(site): prune component CSS variants and split shell from route stylesheets (anomalyco#62990) * fix(stats): map crouton alpha to muse ember (anomalyco#62994) * chore(infra): point docs.opencode.ai at the site worker (anomalyco#62999) * docs(console): add MiniMax M3.1 Flash Free (anomalyco#63005) Co-authored-by: MrMushrooooom <19261047+MrMushrooooom@users.noreply.github.com> * fix(core): count session generate requests in the session's cost (anomalyco#63006) * feat(ai): add embedding models with the OpenAI embeddings protocol (anomalyco#62832) * refactor(ai): remove the ImageResponse.image shortcut (anomalyco#63011) * fix(core): keep MCP OAuth credentials when a refresh fails temporarily (anomalyco#63012) * feat(ai): add Google embedContent embeddings (anomalyco#62843) * feat(core): add GitHub Copilot Auto and a model resolve hook (anomalyco#62997) * refactor(plugin): edit the model in place in experimental.model.resolve (anomalyco#63015) * feat(ai): add Vertex predict embeddings (anomalyco#62844) * feat(ai): add Google and Vertex embedding entry points (anomalyco#63017) * refactor(core): share OAuth credential refresh between provider logins and MCP (anomalyco#63022) * fix(core): keep background compaction from stopping a running Claude Agent session (anomalyco#63025) * fix(core): keep catalog capabilities when a v1 model override sets only some (anomalyco#62573) * fix(site): build the Worker as one file so its chunks can't import each other (anomalyco#63031) * feat(site): serve the reading pages as static HTML (anomalyco#63032) * fix(core): send gatewayApiKey to Cloudflare AI Gateway (anomalyco#62574) * fix(core): put Console event watches behind the console_watches flag (anomalyco#63036) * fix(core): stop splitting an emoji when read truncates a long line (anomalyco#62575) * fix(core): list Console's watch tool and say pull requests wake with their checks (anomalyco#63039) * fix(core): stop interrupting Claude Agent tool calls when instructions or tools change (anomalyco#63033) * ignore: wait for plugins again where managed policy applies (anomalyco#63040) * refactor(site): share the static pages' behaviour with their components (anomalyco#63041) * chore(perf): bench with strobe 0.28.0 (anomalyco#63043) * release: v2.2.6 (anomalyco#62450) Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com> * feat(site): serve the home and product pages as static HTML (anomalyco#63060) * refactor(site): make every page static and stop shipping the app's JavaScript (anomalyco#63067) * feat(app): make session IDs easier to find and copy (anomalyco#63083) * release: v2.2.7 (anomalyco#63085) Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com> * feat(app): show tab shortcut numbers while holding the mod key (anomalyco#63089) * fix(site): answer other methods on pages with a 405 (anomalyco#63102) * fix(site): send every unhandled method a 405 listing what the address takes (anomalyco#63104) * fix(app): tighten gap between titlebar search and first tab to 10px (anomalyco#63108) * chore(release): mint short-lived cloudflare token for r2 uploads (anomalyco#63115) * docs(console): list Muse Ember 1.0's over-200K price (anomalyco#63116) * feat(app): queue a follow-up first with Alt+Enter (anomalyco#63109) * feat(app): steer the next queued prompt with Mod+Enter (anomalyco#63111) * fix(site): load the changelog's collapsed lists when opened (anomalyco#63122) * chore(web): move the V1 docs into services/site and remove packages/web (anomalyco#63117) * fix(release): publish platform packages before the cli package (anomalyco#63124) * feat(app): link Console MCPs and skills in Extensions settings (anomalyco#63125) * fix(site): serve 1344-wide hero videos to 1x screens and phones (anomalyco#63135) * refactor(site): keep Solid off the static pages until an overlay opens (anomalyco#63140) * refactor(site): drop code only the hydrated production pages used (anomalyco#63147) * fix(core): retry failed streams cleanly and keep finished work on interrupt (anomalyco#60674) * fix(core): send Copilot requests to the login's own endpoint until models load (anomalyco#63146) * feat(core): background shell commands when their timeout expires (anomalyco#63024) * docs(console): add Gemini 4 Carbon to Zen (anomalyco#63153) Co-authored-by: Daniel <daniel@anoma.ly> * refactor(core): remove the import cycle between provider and aisdk-native (anomalyco#62883) Co-authored-by: Aiden Cline <63023139+rekram1-node@users.noreply.github.com> * refactor(ai): remove the import cycles between media modules and their clients (anomalyco#62882) Co-authored-by: Aiden Cline <63023139+rekram1-node@users.noreply.github.com> * refactor(site): share the docs' and static pages' shell code (anomalyco#63161) * fix(site): keep the Like letters? bar's look when the announcement banner is off (anomalyco#63157) * docs(console): document paying for Go with credit (anomalyco#63162) * fix(site): give the not-found page one stylesheet of what it renders (anomalyco#63169) * feat(app): add an experimental customizable sessions sidebar (anomalyco#63143) * feat(core): speak opencode-pty protocol v8 (anomalyco#62976) * fix(app): slide the file tree sidebar open and shut again (anomalyco#62773) * fix(core): keep a shell command's output when the user interrupts its call (anomalyco#62977) * fix(app): name the main checkout by its branch instead of Local (anomalyco#63187) * feat(core): run shell commands in the process daemon across handoffs (anomalyco#62978) * feat(plugin): let promise tools stop cooperatively through their signal (anomalyco#63127) * feat(core): use freeform tool input on models that support it (anomalyco#61703) * fix(core): accept decision-type models from LM Studio (anomalyco#56214) * fix(tui): draw paste chip text dark in dark mode and light in light mode (anomalyco#62930) * fix(tui): open the right activity tab and make tabs clickable (anomalyco#60168) * feat(app): add Recent sessions sidebar experiment and iOS-style recency (anomalyco#63177) * feat(tui): default transcript verbosity to low (anomalyco#63207) * fix(app): show Recent sidebar rows exactly like side tabs (anomalyco#63211) * fix(desktop): stop freezing the main process during the login shell env probe (anomalyco#63208) * v0.8.4 (anomalyco#63055) * fix(core): accept null context length from LM Studio models (anomalyco#63198) * fix(core): report a refused Console auto-watch (anomalyco#63217) * fix(cli): update npm installs through their own prefix (anomalyco#63152) * feat(codemode): rank tool search with name-weighted BM25 (anomalyco#62984) * feat(core): run LM Studio decision models (anomalyco#63200) * fix(core): describe the execute program as plain JavaScript for every tool shape (anomalyco#63226) * chore(ci): keep the heavy test tier off pull requests pull requests now run the affected unit tests on linux only. the windows unit tests, the compiled builds and the four playwright suites still run on every push to dev and beta, on nightly runs, and as a release.yml gate before a stable release publishes. * chore(skills): describe the test tiers as they now run * chore(ci): gate a stable release on the linux browser suites the windows playwright legs still fail on dev pushes often enough that a release gate over them would stall shipping. unit tests and builds still cover both OSes, and dev pushes and nightly runs still cover the windows browser legs. * feat(tui): open sessions from session IDs in messages (anomalyco#63224) * chore: move the api worker into the legacy service * fix(tui): only re-highlight blocks whose session link changed (anomalyco#63247) * chore: move the data site off sst the stats site, its og worker and the sync workflow deploy from services/data with cf as opencode-data-<stage>, opencode-data-og-<stage> and opencode-data-sync-<stage>. the beta web app and the whole sst setup (sst.config.ts, infra/, sst-env.d.ts, the sst dependency) are gone, so nothing deploys through sst anymore (security finding anomalyco#920). * chore: drop the sst-env.d.ts files sst regenerated * fix(core): refresh MCP OAuth tokens before they expire (anomalyco#63028) * fix(site): keep the bare host as a custom domain * fix(ai): keep exhausted request rate limits retryable (anomalyco#59816) * fix(codemode): return compact JSON results (anomalyco#63258) * feat(core): support MCP events in the MCP client (anomalyco#63254) Co-authored-by: Adam <2363879+adamdotdevin@users.noreply.github.com> * ci(deploy): mint short-lived cloudflare tokens from the token issuer * feat(core): wake a session on MCP events with a watch tool (anomalyco#63269) Co-authored-by: Adam <2363879+adamdotdevin@users.noreply.github.com> * fix(core): send saved keys during local model discovery (anomalyco#63266) * refactor(data): strict dev/production stages and data naming - services/data/stage.ts: stage(mode) throws on anything but dev or production, used by all three configs, build.ts and deploy.ts - packages/stats -> packages/data (@opencode/data-app, -core, -server) - StatsSyncWorkflow -> DataSyncWorkflow, instance ids data-hourly-/data-history-, Data* resource keys, data sync log lines - worker, route, workflow and cron names unchanged * feat(core): tell agents when they are in a fork (anomalyco#63235) Co-authored-by: OpenCode Agent <opencode-agent[bot]@users.noreply.github.com> * fix(deploy): run Cloudflare deploys from verified artifacts behind pinned targets Repository code outside .github/ needs no review, but every deploy job held a Cloudflare token strong enough to write any Worker on the account (the data sync Workflow PUT has no per-Worker permission). A dev merge could therefore overwrite production Workers. Split each service into a build job with no environment, secrets, or OIDC token that uploads a SHA256SUMS artifact, and a deploy job in dev|production that checks out only .github/release/, verifies the artifact against the build job's digest, installs the cf/wrangler CLI pinned here, and runs only deploy-*.sh. The deploy scripts treat the artifact as data and refuse it unless its resolved config equals the pinned target in .github/release/targets/ exactly: Worker names, routes, custom domains, crons, Workflow names, and bindings. For cf services the pinned config is what cf reads. That is what makes an account-wide token safe, and it keeps production out of reach of a dev merge. Adds the cf 1.0.0-beta.12 and wrangler 4.110.0 lockfiles the deploy jobs install with npm ci --ignore-scripts. * fix(core): fetch Console instructions and skills only when the config says the workspace has them (anomalyco#63259) * fix(ci): treat require-digests=false as off in verify-artifacts The download action always sets OPENCODE_REQUIRE_DIGESTS (false by default), so testing for a non-empty value required digests for release artifacts that legitimately have none and broke sign-macos, sign-windows and publish-attestations. Compare the value to true instead. * fix(site): show download and install menus again after closing them (anomalyco#63311) * feat(app): add the New timeline experiment (anomalyco#63295) * fix(app): snap vertical tab preview to its tab (anomalyco#63074) * feat(app): limit Recent sidebar to 7 days and 30 rows, align its hover preview (anomalyco#63313) * fix(tui): give plugins a live theme view (anomalyco#63306) * fix(app): accept a pasted redirect URL for provider sign-in (anomalyco#63315) Co-authored-by: Aiden Cline <aidenpcline@gmail.com> * fix(session): measure tps from the first streamed token (anomalyco#63321) * chore(protocol): refresh generated openapi for the first-token event (anomalyco#63324) * fix(app): show only the branch in the new session row (anomalyco#63182) * refactor(codemode): remove the legacy interpreter; the VM is the only engine (anomalyco#62642) * fix(core): keep the truncated preview when tool output can't be saved (anomalyco#63334) * fix(app): show the agent switcher by default (anomalyco#63337) * feat(process-daemon): pipe mode on Windows (anomalyco#63196) * fix(update): verify access identity on admin routes (anomalyco#63340) * fix(app): remeasure the desktop drag area when direction changes (anomalyco#63347) * chore: remove beta what's new and visual svgs (anomalyco#63325) * feat(core): report subagent results to the parent every time a child goes idle (anomalyco#63209) * chore(process-daemon): release 0.5.1 (anomalyco#63366) * refactor(process-daemon): simplify Windows pipe mode (anomalyco#63346) * chore(process-daemon): allow 60 minutes for Windows release builds (anomalyco#63378) * feat(core): always run subagents in the background (anomalyco#63382) * refactor(core): remove the unused foreground path from SubagentJob (anomalyco#63223) * fix(core): defer restart wakes until parent attempts are counted (anomalyco#63367) * chore(process-daemon): release 0.5.2 (anomalyco#63381) * feat(ai): add Google Decisions (anomalyco#63369) * fix(acp): stream the parent's reaction to background subagent reports (anomalyco#63395) * chore(core): bump gitlab-ai-provider to 6.24.0 (anomalyco#63342) * ci: deploy dev workers in anomaly-dev (anomalyco#63379) * read dev data sync from the dev lake * fix(core): show the start of tool output that exceeds the limit (anomalyco#63272) * feat(site): simplify the docs header menu and move the V1 notice into the header (anomalyco#63399) * chore(site): update OpenCode link cards (anomalyco#63401) * refactor(core): remove leftover foreground subagent and reattach code (anomalyco#63392) * refactor(app): remove leftover foreground subagent UI (anomalyco#63391) * fix(tui): show the subagent card instead of launch instructions in mini scrollback (anomalyco#63389) * chore(site): remove the /ide page (anomalyco#63386) Co-authored-by: Adam <2363879+adamdotdevin@users.noreply.github.com> * ci: run macos build jobs on blacksmith (anomalyco#63397) * fix(storybook): provide settings context to stories * fix(app): avoid transforms on scrolling composer suggestions * fix(app): keep mobile tab menu open when closing tabs * fix(desktop): update build-windows.bat to post-merge workflow The merge adopted the upstream desktop workflow, which folded prebuild into build and removed package:win. Drop the stale prebuild step and package the Windows NSIS installer directly with electron-builder. * chore: ignore Astro and Cloudflare build artifacts Ignore the generated .astro content modules, .wrangler miniflare state, and the generated services/www/public/cli.json schema so local builds of the site packages no longer show up as untracked files. * fix(core): keep ephemeral server credentials from wiping shared auth sessions A stdio/ACP auxiliary server mints its own random password and shares the data directory (and database) with the canonical server. On startup, AuthSession.configure treated the verifier mismatch as a credential change: it deleted the whole auth_session table, wiping the canonical server's remembered logins, and adopted a random verifier. Thread an ephemeral flag from the CLI (set when the password was minted, not from env/config) down to configure, which now skips the reconcile for such a process. The canonical server's behavior, including invalidation on a real credential change, is unchanged. * fix(desktop): update build-mac.sh to the post-merge build workflow The script called bun run prebuild and bun run package:mac, neither of which exists in packages/desktop/package.json, so it aborted before producing a build. Mirror build-windows.bat: run bun run build, then bunx electron-builder --mac --publish never --config electron-builder.config.ts. * feat(app): add sortable schedule list with persisted preference The schedules panel gains a sort selector with three modes: name (alphabetical, the default), lastRun (most recent first, never-run tasks last), and status (enabled first, name order within each group). The choice is stored with the app's local preference storage (home.schedules.sort) and restored when the panel reopens. A neutral review pass pinned the never-run ordering (second undefined fixture plus a numeric-aware name pair) and replaced the -Infinity comparator sentinel with -1, since lastRunAtMs is a NonNegativeInt, so the comparator always returns a finite number. * feat(session-ui): show full input in expanded generic tool calls --------- Co-authored-by: David Hill <1879069+iamdavidhill@users.noreply.github.com> Co-authored-by: Adam <2363879+adamdotdevin@users.noreply.github.com> Co-authored-by: Kit Langton <kit.langton@gmail.com> Co-authored-by: vprdev <mail@alanrice.me> Co-authored-by: Aiden Cline <aidenpcline@gmail.com> Co-authored-by: Aiden Cline <63023139+rekram1-node@users.noreply.github.com> Co-authored-by: Luke Parker <10430890+Hona@users.noreply.github.com> Co-authored-by: exe.dev user <exedev@anton.exe.xyz> Co-authored-by: James Long <longster@gmail.com> Co-authored-by: Dan Smolsky <78942835+Tarquinen@users.noreply.github.com> Co-authored-by: opencode-agent[bot] <219766164+opencode-agent[bot]@users.noreply.github.com> Co-authored-by: Daniel <daniel@anoma.ly> Co-authored-by: smagnuso <smagnuso@gmail.com> Co-authored-by: Dan Smolsky <dannysmo@gmail.com> Co-authored-by: 2SinceJuly <202121119+2SinceJuly@users.noreply.github.com> Co-authored-by: Jack <jack@anoma.ly> Co-authored-by: Stefan Avram <98915060+Slickstef11@users.noreply.github.com> Co-authored-by: usrnk1 <7547651+usrnk1@users.noreply.github.com> Co-authored-by: Ludvig Rask <74653458+ludvigrask@users.noreply.github.com> Co-authored-by: Dax <mail@thdxr.com> Co-authored-by: Ryan Skidmore <4580448+ryanskidmore@users.noreply.github.com> Co-authored-by: Frank <frank@anoma.ly> Co-authored-by: Jay <air@live.ca> Co-authored-by: MrMushrooooom <19261047+MrMushrooooom@users.noreply.github.com> Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com> Co-authored-by: Liyang Zhu <tomzhu1024@outlook.com> Co-authored-by: OpeOginni <107570612+OpeOginni@users.noreply.github.com> Co-authored-by: Simon Klee <hello@simonklee.dk> Co-authored-by: Dax Raad <d@ironbay.co> Co-authored-by: Kyle Bush <157062883+Kyle-j-bush@users.noreply.github.com> Co-authored-by: Sebastian <hasta84@gmail.com> Co-authored-by: OpenCode Agent <opencode-agent[bot]@users.noreply.github.com> Co-authored-by: Aarav Sareen <96787824+arvsrn@users.noreply.github.com> Co-authored-by: Swapnil Devesh <sid.swapnildevesh@gmail.com> Co-authored-by: Filip <34747899+neriousy@users.noreply.github.com> Co-authored-by: Vladimir Glafirov <vglafirov@gitlab.com>
Problem
MCP servers can now offer events (SEP-3415, the draft
io.modelcontextprotocol/eventsextension), but our MCP client can't declare, list or stream them, so nothing in OpenCode can build on them.Change
The MCP client layer from #63178, without the tool. Behind the
mcp_eventsflag, a connection declares the extension, and for a server that offers itConnection.events(andMcp.Service.events(server)) exposes:list(): every event type, followingnextCursor(capped at 100 pages).stream({ name, arguments, cursor, maxAgeMs }): aStreamofactive,event,heartbeatanderrormessages, each with the cursor to persist. It ends when the server closes it, fails withEventStreamTerminatedErroronterminated, and fails when nothing (not even a heartbeat) arrives for 60 seconds, so a consumer can reopen it from its cursor. Interrupting it cancels the request.Changes from #63178:
script/upgrade-mcp-sdk.ts): anonRequestIdrequest option, used to route a stream's notifications by its JSON-RPC id. This replaces wrappingtransport.sendand the custom_metatoken.timeout: Infinitynow disables the request timeout, replacing the 24-day timeout.Mcp-Nameis now taken fromparams.nameonevents/stream,poll,subscribeandunsubscribe.activewithtruncated,heartbeat, recoverableerror,terminated), not onlyevent.events/listfollows pagination.Guarded by the
mcp_eventsflag.Tests
test/mcp-events.test.tsruns a fake in-memory server and covers list pagination, ordered delivery of all message types, graceful close, termination, two concurrent streams routed by subscription id, cancellation when the consumer stops, the 60-second idle timeout underTestClock, and noeventswhen the server doesn't offer it or the connection doesn't declare it.test/mcp.test.tsstreams over Streamable HTTP (2026-07-28) and checksMcp-Name, and checks that no events are offered with the flag off or from a server without them.Visual
Added by the opencode bot (AI-generated).
Related: #48855
Public API: adds the experimental
mcp_eventsconfig flag (backwards compatible, off by default)