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fix(web): MCP App cards no longer flash white in dark mode while the app loads - #33352
In dark mode, MCP App cards on web and desktop are bright white blocks from the moment the frame loads until the app sends ui/initialize. For apps with a large bundle that is seconds. The <iframe> gets color-scheme: dark from the host, but the app document has no color scheme until the theme bootstrap hears from the host, so Chromium paints the child canvas opaque white.
Reproduced on main 1a43f4870d in the web app: a Claude thread called a synthetic MCP tool whose ui:// app sends ui/initialize 4 s after load. In dark mode both cards stayed white for about 4 s after switching back to the thread, and again after a full page reload. Light mode was unaffected.
Change
McpAppFrame adds a t3-color-scheme=<light|dark> query parameter to the frame URL when it first adopts it. The frame still keeps that one URL; later theme changes keep flowing through ui/notifications/host-context-changed.
The theme bootstrap that the server already injects into every app document reads that parameter and appends <meta name="color-scheme" content="…"> to the app's head before the app's own scripts run and before first paint. It uses a meta tag rather than an inline style on <html>, which would replace an app's own <html style> attribute. The captured fixture app sets no styles or color scheme of its own, so an app that sets color-scheme in its own CSS is not shown below.
The server route ignores the query string (the asset token is in the path), so older servers keep today's behaviour. Mobile sets no color scheme on its inner frame and is unchanged.
vp test run packages/shared/src/mcpApp.test.ts apps/server/src/http.test.ts: 39 passed, including a new test that the bootstrap applies only light/dark from the frame URL before any message arrives.
At e829b7b38f (main merged; upstream changes touch only mobile files): vp test run packages/shared/src/mcpApp.test.ts 15 passed; vp run check:changed: format, lint, knip, typecheck (35 packages), tests and React compiler all pass; CI 35/35 green.
Review at e829b7b38f: two independent reviewers, both merge, no findings. Both name the same trade-off, row C6 below. Neither change touches auth, sandboxing, CSP or the MCP tool surface; the parameter parse is linear (about 2 ms on 3000 malformed tokens).
Proof audit at e829b7b38f: all 57 PNGs and 10 recordings inspected; every delivered diff image recomputes exactly. C2–C5 are sufficient. An independent rebuild of C1 paints both cards dark before ui/initialize, as captured, but differs by 5,977 pixels: its seed turn (a real provider turn) wrote an extra "Worked for" row that moves the cards down 42 px. The C6 frames show the loading text losing contrast in the pre-initialize window, as described.
Real web app, headless Chromium 148, 1400×1022, DPR 1, fresh databases per side, a synthetic MCP app that initializes after 4 s. Captures at 807635d674; the later commits on the branch are a comment wording change and a merge of main that does not touch the changed files.
C1, T3 dark on a light browser preference, about 2 s after returning to the thread:
Diff0 is threshold 0, DiffT threshold 8/255, both amplified 32×. Only the two app canvases change; there are zero changed pixels outside them at threshold 0.
…app loads
The frame element declared the host's dark color scheme, but the app
document declared none until `ui/initialize` answered, so Chromium painted
the child canvas opaque white for as long as the app took to initialize.
The frame URL now carries the host's scheme in a `t3-color-scheme` query
parameter, and the injected theme bootstrap applies it before first paint.
Later theme changes still arrive through host-context-changed.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
Macroscope's review found this PR approvable — MCP App frames receive the existing host theme before initialization, preventing the white loading flash in dark mode. The change is limited to initial presentation and preserves subsequent theme updates.
No code changes detected at 7f2ac6d. Prior analysis still applies.
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Walkthrough
The MCP App frame URL now includes the host’s current theme appearance. The theme bootstrap reads that parameter before host initialization and sets a color-scheme meta tag for light or dark.
Changes: MCP App theme initialization
Layer / File(s)
Summary
Bootstrap color scheme from frame URL packages/shared/src/mcpApp.ts, packages/shared/src/mcpApp.test.ts
The bootstrap reads the t3-color-scheme parameter and adds a color-scheme meta tag when its value is light or dark. Tests cover those values, normal, and a missing parameter.
Pass host appearance to frame apps/web/src/components/chat/McpAppFrame.tsx
When the asset succeeds and the frame source is unset, the frame adds the current theme appearance to the asset URL before setting its source.
Web frames receive the initial theme; mobile behavior remains unchanged. No material merge blocker was identified.
Pre-merge checks: 4
Check name
Status
Explanation
Title check
The title names the actual change: MCP App cards stop flashing white in dark mode while the app loads. It is specific and follows the conventional commit form. The raw summary, PR objectives, and link…
Linked Issues check
Directly linked issue #33303 requires that MCP App cards not paint a white canvas in dark mode before the app sends ui/initialize. Its suggested approaches are a themed placeholder or setting the colo…
Out of Scope Changes check
The whole-PR changes touch three files in the reviewed diff: packages/shared/src/mcpApp.ts, packages/shared/src/mcpApp.test.ts, and apps/web/src/components/chat/McpAppFrame.tsx. Each change connects t…
Description check
The description covers the problem, change, linked issue, verification results, UI evidence, and untested areas. It does not identify explicit maintainer approval of the scope or explain why the fix q…
Full details: Title check
Explanation
The title names the actual change: MCP App cards stop flashing white in dark mode while the app loads. It is specific and follows the conventional commit form. The raw summary, PR objectives, and linked issue #33303 all describe this same fix, so the title matches the changeset.
Full details: Linked Issues check
Explanation
Directly linked issue #33303 requires that MCP App cards not paint a white canvas in dark mode before the app sends ui/initialize. Its suggested approaches are a themed placeholder or setting the color scheme before first paint. The PR uses the second approach.
Code evidence at head:
apps/web/src/components/chat/McpAppFrame.tsx: when the frame first adopts its URL, the code sets t3-color-scheme=<theme.appearance> on the asset URL. The URL is still set only once, so later theme changes use ui/notifications/host-context-changed as before.
packages/shared/src/mcpApp.ts: injectMcpAppThemeBootstrap reads MCP_APP_COLOR_SCHEME_PARAM from location.search. When the value is light or dark, it appends <meta name="color-scheme"> to document.head. The bootstrap script is placed after the doctype and optional CSP meta, before any app content or app script, so the parser places it in head before app scripts run.
packages/shared/src/mcpApp.test.ts: a new test runs the bootstrap in a VM with a mocked document. It asserts that dark and light apply a meta tag, and that normal or a missing parameter applies none.
The fix does not depend on the host message, so it covers the window before ui/initialize, which is the scope of #33303.
Uncertainty: I did not verify in code that theme.appearance resolves to light or dark and not system. The author reports headless Chromium captures for system and dark theme rows (C1, C3) that show the fix. Those captures are author-reported and I did not reproduce them. The unit test runs against a mocked document, not a real browser. Residual limitation (author-reported C6): a theme change before ui/initialize keeps the mount-time scheme. This is not a stated requirement of #33303.
Full details: Out of Scope Changes check
Explanation
The whole-PR changes touch three files in the reviewed diff: packages/shared/src/mcpApp.ts, packages/shared/src/mcpApp.test.ts, and apps/web/src/components/chat/McpAppFrame.tsx. Each change connects to #33303:
McpAppFrame.tsx: adds the color-scheme query parameter to the initial frame URL.
mcpApp.ts: adds the MCP_APP_COLOR_SCHEME_PARAM constant and the bootstrap logic that reads it and applies the meta tag.
mcpApp.test.ts: tests the new bootstrap behavior.
No unrelated change is present in the reviewed diff. The PR description states that the server route, mobile inner frame, and Electron app are unchanged. I did not inspect the server route or mobile code, so those statements are not verified here. They do not affect this verdict, because no server or mobile file appears in the whole-PR change set.
Full details: Description check
Explanation
The description covers the problem, change, linked issue, verification results, UI evidence, and untested areas. It does not identify explicit maintainer approval of the scope or explain why the fix qualifies without that approval.
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Reviewing files that changed from the base of the PR and between 4f0b74e and 6d93911.
Files selected for processing: 3
apps/web/src/components/chat/McpAppFrame.tsx
packages/shared/src/mcpApp.test.ts
packages/shared/src/mcpApp.ts
Included review availability: This review used your included allowance. Your plan provides up to 10 included reviews per hour; 8 remain after this review.
Both captures: real web dev servers, Chromium 157 on Linux, dark appearance, 1280×800 CSS viewport, DPR 2, separate fresh databases and identical synthetic data.
Steps: seed a synthetic ui://apps/dataviz MCP App that delays ui/initialize by four seconds; open its thread; reload the page; observe through initialization. Tool output was replayed through the real adapter and orchestration. The attachment route, chat card and sandboxed iframe used each commit's production code.
* fix(server): one finished turn looks up its branch's pull request once (pingdotgg#33752)
Co-authored-by: Claude Opus 5.5 <[email protected]>
* fix(mobile): Android Files sheet scrolls its tree instead of dragging the sheet (pingdotgg#33223)
Co-authored-by: maria-rcks <[email protected]>
Co-authored-by: Julius Marminge <[email protected]>
Co-authored-by: Claude Opus 5.5 <[email protected]>
* fix(web): prompt suggestions show after a steered turn (pingdotgg#33706)
Co-authored-by: Nathan Wong <[email protected]>
Co-authored-by: Claude Opus 5.5 <[email protected]>
Co-authored-by: Julius Marminge <[email protected]>
* fix(server): usage prices Claude Mythos 5.2 from its Bedrock rate (pingdotgg#33721)
* fix(server): Claude turns whose CLI exits before its first frame fail instead of running forever (pingdotgg#33008)
Co-authored-by: Claude Opus 5.5 <[email protected]>
* fix(web): panel resize handles follow touch drags (pingdotgg#33066)
Co-authored-by: Claude Opus 5.5 <[email protected]>
* fix(server): signed-out Claude instances with their own config dir name it in the sign-in hint (pingdotgg#32951)
Co-authored-by: Claude Opus 5.5 <[email protected]>
* perf(server): opening a long thread reads from its latest segments, not its whole history (pingdotgg#33305)
Co-authored-by: Claude Opus 5.5 <[email protected]>
* fix(server): repos without a remote no longer record failed spans on status refresh (pingdotgg#32905)
Co-authored-by: ferhtgoldaraz <[email protected]>
Co-authored-by: Claude Opus 5.5 <[email protected]>
Co-authored-by: Julius Marminge <[email protected]>
* fix(mobile): missing files in previews name the checked path instead of asking to reconnect (pingdotgg#32994)
Co-authored-by: Claude Opus 5.5 <[email protected]>
* fix(server): a restart that misses its turn starts as a new turn (pingdotgg#32899)
Co-authored-by: Claude Opus 5.5 <[email protected]>
* fix(desktop): new browser tabs no longer lose waits, clicks and snapshots for good (pingdotgg#32861)
Co-authored-by: Claude Opus 5.5 <[email protected]>
* fix(web): Go to source on a side chat quote keeps you on its parent thread (pingdotgg#33160)
Co-authored-by: Claude Opus 5.5 <[email protected]>
* fix(server): removing a queued completion message keeps its siblings' wakes (pingdotgg#32815)
Co-authored-by: Claude Opus 5.5 <[email protected]>
* fix(server): dev database seed drops active pull request watches (pingdotgg#32744)
Co-authored-by: Claude Opus 5.5 <[email protected]>
* fix(server): capture iOS screenshots on Xcode 26's simctl (pingdotgg#28353)
Co-authored-by: PR Batch Tester <[email protected]>
Co-authored-by: Claude Opus 5.5 <[email protected]>
* fix(mobile): medium Android windows keep the rail's room and the sidebar's place (pingdotgg#33021)
Co-authored-by: dongxingong <[email protected]>
Co-authored-by: Julius Marminge <[email protected]>
* fix(web): notify when a new request replaces the pending one in a run (pingdotgg#32719)
* fix(server): Codex first-request usage limits keep their reset time (pingdotgg#27791)
Co-authored-by: PR Batch Tester <[email protected]>
Co-authored-by: Claude Opus 5.5 <[email protected]>
Co-authored-by: maria-rcks <[email protected]>
* fix(web): minimap next turn is disabled at the bottom of a thread (pingdotgg#33038)
Co-authored-by: Claude Opus 5.5 <[email protected]>
* fix(cursor): a steer keeps the prompt it interrupted (pingdotgg#32583)
Co-authored-by: Claude Opus 5.5 <[email protected]>
* test: remove redundant short-string truncation test (pingdotgg#33867)
Co-authored-by: t3-code[bot] <269035359+t3-code[bot]@users.noreply.github.com>
* fix(pi): Pi models whose provider ID contains a slash can be selected (pingdotgg#32585)
Co-authored-by: Claude Opus 5.5 <[email protected]>
* perf(server): MCP tool calls no longer read the caller's whole thread (pingdotgg#33295)
Co-authored-by: Claude Opus 5.5 <[email protected]>
* fix(ssh): concurrent launches on one remote home share one server (pingdotgg#32587)
Co-authored-by: Claude Opus 5.5 <[email protected]>
* fix(mobile): iOS 18 iPad sidebar and thread feed start below the header (pingdotgg#32936)
Co-authored-by: Claude Opus 5.5 <[email protected]>
* fix(web): Tab reaches the add-project and new-project submit buttons (pingdotgg#32605)
Co-authored-by: Claude Opus 5.5 <[email protected]>
* fix(web): screen readers hear the add-project submit shortcut (pingdotgg#32576)
Co-authored-by: Claude Opus 5.5 <[email protected]>
* fix(server): Antigravity limits read the quota host the account is metered on (pingdotgg#32425)
Co-authored-by: Claude Opus 5.5 <[email protected]>
* fix(web): the thread menu works for an older settled thread the sidebar hasn't loaded (pingdotgg#32507)
Co-authored-by: Claude Opus 5.5 <[email protected]>
* fix(opencode): show questions asked while OpenCode wakes a session on its own (pingdotgg#32434)
Co-authored-by: Claude Opus 5.5 <[email protected]>
* fix(server): blank .gitignore lines no longer make checkpoints drop new files (pingdotgg#32374)
Co-authored-by: Claude Opus 5.5 <[email protected]>
* test(web): minimap next-turn test no longer flakes after a resize (pingdotgg#33964)
Co-authored-by: Claude Opus 5.5 <[email protected]>
* feat(opencode): mirror native goals across clients (pingdotgg#33758)
OpenCode native goals were missing from the shared goal projection and turn lifecycle. Synchronize goal state and continuation executions, gate dispatch on supported connected versions, and preserve older-version commands and provider-switch context.
Handle reconnect freshness, pending steers, delayed control replies, and unreadable goal updates without losing tracked work. Reuse the existing goal UI across clients.
Verified with check:changed, 264 affected tests, focused Codex/Claude goal tests, and CI. Live provider and manual client verification were not performed.
Created with GPT-6.1 Sol through the Codex harness.
* feat(web): bindable shortcut to regenerate a thread's title (pingdotgg#33987)
Co-authored-by: Sharan Yalburgi <[email protected]>
Co-authored-by: Claude Opus 5.5 <[email protected]>
* fix(server): linked projects keep their repository identity while it refreshes (pingdotgg#32359)
Co-authored-by: Claude Opus 5.5 <[email protected]>
* fix(mobile): tool call commands are highlighted and monospaced like on web (pingdotgg#33957)
Co-authored-by: Claude Opus 5.5 <[email protected]>
* fix: Claude monitor wakes no longer fire a completion alert per line (pingdotgg#32520)
Co-authored-by: Claude Opus 5.5 <[email protected]>
* fix(server): removed thread worktrees keep their project's skills in the picker (pingdotgg#32471)
Co-authored-by: Claude Opus 5.5 <[email protected]>
* fix(web): drag command palette threads into the composer (pingdotgg#33990)
* fix(shared): show zero seconds in minute durations (pingdotgg#33994)
* fix(web): closing the right panel returns focus to where it was (pingdotgg#32569)
* fix(server): say why threads without a project are unavailable (pingdotgg#32342)
Co-authored-by: Claude Opus 5.5 <[email protected]>
* fix: chat file links open the file agents cite (pingdotgg#33943)
Co-authored-by: Claude Opus 5.5 <[email protected]>
* fix(clients): scroll truncated command output notice with logs (pingdotgg#34011)
* fix(web): show app bundle icons and open apps from markdown links
macOS app-bundle links now display their native icons and offer Open app on eligible local hosts. Reuse the desktop host environment identity and direct loopback detection to keep launches local.
Resolve icons from the exact bundle path, expand home-relative icon and file-manager paths on the server, and require filesystem-read permission for path-selected icons.
Validated with focused regressions, a real Calculator icon and app launch, and green CI and automated reviews on e3e8b78. All review threads are resolved.
GPT 6.1 Sol via the Codex harness in T3 Code.
* feat(opencode): project native todo updates into checklists
Project successful OpenCode native todowrite results into T3 checklists, including reconnect recovery, status changes, cancelled tasks, and clears. Preserve failed and unrecognized tool results.
Validated with check:changed, 124 tests, full PR CI, and a real OpenCode 2.2.6 / MiniMax M3.1 Flash Free run through the dev web UI.
Model: GPT 6.1 Sol. Harness: Codex.
* fix(antigravity): recognize Gemini 4 Carbon and its quota (pingdotgg#33991)
* perf(client): reopening a finished command row no longer refetches its output (pingdotgg#34002)
Co-authored-by: Claude Opus 5.5 <[email protected]>
* perf(server): user-only message reads use the user-message index for ordinals (pingdotgg#33009)
* fix(web): keep HTML previews anchored when accordions expand (pingdotgg#34003)
* fix(web): preserve search result titles in drag previews (pingdotgg#34017)
* fix: file links with line ranges open at their first line (pingdotgg#34006)
Co-authored-by: Claude Opus 5.5 <[email protected]>
* fix(codex): show image generation tool calls
Codex image generation now appears as a timeline tool row with prompt and transparency inputs, completion results, failures, and cancellation. Retain inputs on cancellation and give image-only replies a separate message ID so they cannot replace the tool row.
Verified with a real image generation and collapsed/expanded UI captures. check:changed passes, including 152 tests; CI and agentic reviews pass on 86d2045.
Model: GPT 6.1 Sol via the Codex harness.
* fix(pi): a steer Pi has not read yet shows as waiting, not steered (pingdotgg#33982)
* fix(server): provider switches hand off started cancelled runs (pingdotgg#34016)
* fix(web,mobile): replace sparkles icons and ban them with a lint rule (pingdotgg#25422)
* fix(github): a proxy's 403 with Retry-After is no longer reported as a rate limit (pingdotgg#33676)
Co-authored-by: Claude Opus 5.5 <[email protected]>
* fix(web): sending from an empty citation comment clears the composer (pingdotgg#33440)
Co-authored-by: Claude Opus 5.5 <[email protected]>
* fix(server): text generation fallback respects project provider settings (pingdotgg#33741)
Co-authored-by: Claude Opus 5.5 <[email protected]>
Co-authored-by: Julius Marminge <[email protected]>
* feat(usage): show Muse Code limits, and xAI and Antigravity accounts from a CLIProxyAPI hub (pingdotgg#33800)
Co-authored-by: maria-rcks <[email protected]>
Co-authored-by: Julius Marminge <[email protected]>
* fix(web): preserve previews during attachment preparation (pingdotgg#33949)
* fix(desktop): input during window teardown no longer throws in the main process (pingdotgg#33620)
* fix(web): sent messages keep the numbers written on list items (pingdotgg#33820)
Co-authored-by: Claude Opus 5.5 <[email protected]>
Co-authored-by: Yash Singh <[email protected]>
* fix(server): quitting stops an agent-device daemon left by an earlier server (pingdotgg#33587)
Co-authored-by: Claude Opus 5.5 <[email protected]>
* fix(mobile): attaching larger images no longer crashes with a BigInt error (pingdotgg#34087)
Co-authored-by: Claude Opus 5.5 <[email protected]>
* feat(mobile): pick a voice environment once, then its method (pingdotgg#34073)
Co-authored-by: Claude Opus 5.5 <[email protected]>
* fix(server): a t3 thread send to a finished delegated child notifies its parent (pingdotgg#33446)
* fix(web): question panel header text sits centered in its row (pingdotgg#34095)
Co-authored-by: Claude Opus 5.5 <[email protected]>
* feat(scripts): scenarios prove a fix in the real app with e2e, on web and iOS (pingdotgg#34007)
Co-authored-by: Claude Fable 5.2 <[email protected]>
* feat(claude): Fable resets are offered and redeemed apart from weekly resets (pingdotgg#34106)
Co-authored-by: Claude Opus 5.5 <[email protected]>
* fix(desktop): desktop IPC only answers the main app window (pingdotgg#34094)
Co-authored-by: Claude Fable 5.2 <[email protected]>
* feat(server): voice models reuse copies already on disk (pingdotgg#34096)
Co-authored-by: Claude Fable 5.2 <[email protected]>
* fix(web): scroll project picker to top on first result (pingdotgg#34113)
* feat(opencode): track native image job outcomes and previews (pingdotgg#34089)
OpenCode image-generation tool success acknowledges a launched background job. Keep that job pending until its native outcome arrives, retain the outcome on the original tool item, and serve size-limited image previews through existing rendering and remote file paths.
Recover outcomes after stream loss, allow later exact-path notices to add previews, and clear descendant image tasks from parent rosters on completion or transport failure. Keep older-server fallback and the pinned SDK.
Validation: check:changed passed with 147 tests; required CI passed and review findings were addressed on 62addc8. Client screenshots use controlled fixtures; no paid image generation was used.
Model: GPT 6.1 Sol. Harness: Codex in T3 Code.
* fix(scripts): scenarios run where localhost resolves to IPv6 first (pingdotgg#34121)
Co-authored-by: Claude Fable 5.2 <[email protected]>
* ci: browser secret helper apt step fetches fewer indexes (pingdotgg#33966)
Co-authored-by: Claude Opus 5.5 <[email protected]>
* fix(client-runtime): a search query pasted from github.com lists pull requests again (pingdotgg#30150)
Co-authored-by: Claude Opus 5.5 <[email protected]>
* fix(web): tighter outdated-conversation cards in the PR code panel (pingdotgg#34140)
Co-authored-by: Claude Opus 5.5 <[email protected]>
* fix(web): MCP App cards no longer flash white in dark mode while the app loads (pingdotgg#33352)
Co-authored-by: Claude Opus 5.5 <[email protected]>
* fix(peer): link requests use the addresses the app already has for a machine (pingdotgg#34139)
Co-authored-by: Claude Mythos 5.2 <[email protected]>
* fix(server): Find frees searched thread text after one idle minute (pingdotgg#34132)
Co-authored-by: Claude Fable 5.2 <[email protected]>
* fix(web): settings search shortcuts follow the physical key on non-US layouts (pingdotgg#33395)
* fix(server): import Codex chats moved into a project from the scratch folder (pingdotgg#32880)
Co-authored-by: Claude Opus 5.5 <[email protected]>
* fix(desktop): clear stale GPU caches when the Electron version changes (pingdotgg#33641)
* fix(web): PR links jump to the comment, diff line, checks or commits they name (pingdotgg#33989)
Co-authored-by: Md.Sadiq <[email protected]>
Co-authored-by: Claude Opus 5.5 <[email protected]>
* fix(cli): installers retry transient GitHub errors (pingdotgg#32913)
Co-authored-by: Claude Opus 5.5 <[email protected]>
* fix(web): opening the terminal with Cmd+J no longer re-renders the whole sidebar (pingdotgg#33129)
Co-authored-by: Claude Opus 5.5 <[email protected]>
* refactor(web): remove icon morphing (pingdotgg#33985)
Toggle and copy icons swap instantly through lucide-react again. Drops the
MorphIcon wrapper plus the morphicons and vanilla lucide dependencies that
only it used.
* feat(opencode): track native shell jobs across turns
## Problem
OpenCode shell tools can return when a background command launches. T3 now keeps that command in its existing background activity UI until it exits or is stopped, retains captured output, and preserves native completion notifications and continuation turns.
## Change
The adapter scopes tracking and Stop to the owning session and its descendants. Recovery uses the experimental shell-job inventory on OpenCode 2.2.6+, with shell-list fallback on supported older servers. After a cold resume, recovered output, terminal state, and idle roster snapshots persist through the existing session event pump before another turn starts. New session-scoped activity is restricted to attached threads and uses the persisted run identity when available so it stays in the current timeline. Polling reads run outside the adapter lock, with stale results discarded after Stop, exit, or another read. Recovery and Stop retain bounded I/O. Final reads retain the output tail, including diagnostics beyond the first four pages. The SDK remains pinned to 2.0.28, and main's native goals, todo checklists, and image jobs are preserved.
## Scope and approval
Maintainer-directed implementation of native OpenCode background shell tracking from the T3 Code handoff. Scope covers shell lifecycle, output retention, recovery, ownership, and Stop using existing background activity services and rendering. The session event pump extension is needed to persist recovered activity while no turn is active. No SDK upgrade, new UI, or provider-wide infrastructure is included. The author, Yash-Singh1, is explicitly listed in the repository's [contribution-triage exemptions](https://github.com/pingdotgg/t3code/blob/main/.github/TRIAGE_EXEMPTIONS.td), verified against upstream main.
## Verification
Validation: `vp run check:changed` passes. Focused regressions cover output paging, exit codes, idle recovery, persisted run anchors, ownership, cancellation failures, and a stalled poll that must not block turn completion or Stop. Real OpenCode UI turns used MiniMax M3.1 Flash Free against isolated development state and covered launch, Details and retained output, natural completion, continuation, and explicit Stop. Cold-idle persistence and remote-server paths use protocol fixtures; native mobile was not exercised.
GPT 6.1 Sol through the Codex harness.
* fix(server): restart send stops a Claude turn and runs the message next (pingdotgg#32902)
Co-authored-by: Claude Opus 5.5 <[email protected]>
* fix(shared): login-shell environment probe ignores DEBUG trap output (pingdotgg#32646)
Co-authored-by: Claude Opus 5.5 <[email protected]>
* fix(web): make Q&A option outlines visible across themes (pingdotgg#34178)
* fix(web): hide empty replies when renders show the result (pingdotgg#34182)
* fix(web): mouse tilt wheel no longer switches threads on Windows and Linux desktop (pingdotgg#32963)
Co-authored-by: Claude Opus 5.5 <[email protected]>
* fix(web): timeline minimap preview no longer steals hover or jumps around (pingdotgg#32151)
Co-authored-by: Julius Marminge <[email protected]>
Co-authored-by: Claude Opus 5.5 <[email protected]>
* fix(server): auto thread sends queue while a turn is stopping (pingdotgg#34163)
Co-authored-by: Julius Marminge <[email protected]>
* fix(server): stream the usage-scan cache to disk instead of one string (pingdotgg#34030)
* fix(clients): images the agent opens stay visible in the chat (pingdotgg#30473)
Co-authored-by: maria-rcks <[email protected]>
Co-authored-by: Julius Marminge <[email protected]>
* fix(client-runtime): pasted repository page URLs clone the repository into its own folder (pingdotgg#32681)
Co-authored-by: Claude Opus 5.5 <[email protected]>
* fix(web): trackpad flicks over the right panel tabs no longer navigate back (pingdotgg#33396)
Co-authored-by: Claude Opus 5.5 <[email protected]>
* fix: new threads move from draft to Working in one step (pingdotgg#33783)
Co-authored-by: Claude Opus 5.5 <[email protected]>
* fix(gitlab): review comments can cover a range of lines (pingdotgg#30535)
Co-authored-by: Claude Opus 5.5 <[email protected]>
Co-authored-by: maria-rcks <[email protected]>
Co-authored-by: Julius Marminge <[email protected]>
* test(web): right panel tab swipe test runs as macOS on any CI host (pingdotgg#34191)
Co-authored-by: Claude Opus 5.5 <[email protected]>
* fix(shared): cite assistant messages with IDs over 512 characters (pingdotgg#28084)
Co-authored-by: Claude Opus 5.5 <[email protected]>
* fix(server): updates copy the database while the server still runs when it cannot be cloned (pingdotgg#33058)
Co-authored-by: Ajraba04 <[email protected]>
Co-authored-by: Julius Marminge <[email protected]>
* fix(mobile): file links in question cards open the file viewer (pingdotgg#29151)
Co-authored-by: Claude Opus 5.5 <[email protected]>
* fix(server): cloning into a stranded clone project's empty folder reuses that project (pingdotgg#33439)
* fix(desktop): stable updates no longer show a nightly's release notes (pingdotgg#32832)
Co-authored-by: Claude Opus 5.5 <[email protected]>
* fix(shared): Open in Zed ignores the OpenZFS zed daemon on Linux (pingdotgg#33479)
* fix(mobile): chat code blocks colour diff, kotlin, sql and other languages again (pingdotgg#33680)
Co-authored-by: Claude Opus 5.5 <[email protected]>
* fix(server): fork Claude threads after project root changes (pingdotgg#22836)
Co-authored-by: Claude Opus 5.5 <[email protected]>
* fix(web): snooze times read naturally in context menus (pingdotgg#24945)
Co-authored-by: Claude Opus 5.5 <[email protected]>
Co-authored-by: Julius Marminge <[email protected]>
* feat(web): label chips show the label's description on hover (pingdotgg#28732)
Co-authored-by: Claude Opus 5.5 <[email protected]>
Co-authored-by: maria-rcks <[email protected]>
Co-authored-by: Julius Marminge <[email protected]>
* feat(web): composer strip names the worktree folder (pingdotgg#28459)
Co-authored-by: Claude Opus 5.5 <[email protected]>
Co-authored-by: Julius Marminge <[email protected]>
* feat(gitlab): revert a merged merge request (pingdotgg#30556)
Co-authored-by: Claude Opus 5.5 <[email protected]>
Co-authored-by: maria-rcks <[email protected]>
Co-authored-by: Julius Marminge <[email protected]>
* fix(claude): version errors from a custom endpoint no longer say to run claude update (pingdotgg#34176)
Co-authored-by: Julius Marminge <[email protected]>
* fix(web): files marked Viewed stay folded when a pull request's Code tab opens again (pingdotgg#34168)
Co-authored-by: Claude Opus 5.5 <[email protected]>
Co-authored-by: Julius Marminge <[email protected]>
* feat(server): watched GitHub pull requests react to host events, not only the 2-minute sweep (pingdotgg#33548)
Co-authored-by: Claude Opus 5.5 <[email protected]>
* fix(server): hide passive Claude Stop-hook summaries (pingdotgg#22964)
* fix(web): dismiss image path tooltips after preview and scroll (pingdotgg#30620)
Co-authored-by: Julius Marminge <[email protected]>
* fix(server): PR sync and run-status checks stop reading whole thread histories (pingdotgg#25728)
Co-authored-by: Claude Opus 5.5 <[email protected]>
* fix(server): preview snapshots keep page text beside large accessibility trees (pingdotgg#33745)
Co-authored-by: Claude Opus 5.5 <[email protected]>
* feat(web): screen readers can hear the agent's messages and steps during a turn (pingdotgg#33900)
Co-authored-by: Claude Fable 5.2 <[email protected]>
* fix(server): thread search finds phrases inside quotes and their comments (pingdotgg#22553)
Co-authored-by: Claude Opus 5.5 <[email protected]>
Co-authored-by: Julius Marminge <[email protected]>
* fix(web): local server cards in the browser empty state take pointer clicks (pingdotgg#34050)
* fix(server): worktrees cut from a non-default base no longer show the base's PR (pingdotgg#22861)
Co-authored-by: Claude Opus 5.5 <[email protected]>
Co-authored-by: Julius Marminge <[email protected]>
* fix(desktop): wait for the local server to exit when quitting (pingdotgg#22996)
Co-authored-by: Claude Opus 5.5 <[email protected]>
* fix(server): agent continuations preserve the working timer start (pingdotgg#22947)
Co-authored-by: Claude Opus 5.5 <[email protected]>
* fix(web): disable the git actions menu when nothing in it is usable (pingdotgg#31972)
Co-authored-by: Julius Marminge <[email protected]>
* fix(server): preserve active turns when switching provider instances (pingdotgg#22755)
Co-authored-by: Claude Opus 5.5 <[email protected]>
* fix(server): scheduled task updates keep the saved workspace unless the binding changes (pingdotgg#32494)
Co-authored-by: Claude Opus 5.5 <[email protected]>
* fix(web): full-screen HTML pages fit their content and zoom by reflowing (pingdotgg#22349)
Co-authored-by: Claude Opus 5.5 <[email protected]>
Co-authored-by: Julius Marminge <[email protected]>
* fix(web): project actions auto-open Preview in web clients (pingdotgg#34048)
* fix(server): a follow-up delegated task waits for a run its child queued on its own thread (pingdotgg#32504)
* fix(server): new worktrees refresh their index once, so captures and status stop re-hashing every file (pingdotgg#21341)
Co-authored-by: maria-rcks <[email protected]>
Co-authored-by: Julius Marminge <[email protected]>
* fix(usage): Grok and Cursor usage limits show pace and the even-spend line (pingdotgg#21897)
Co-authored-by: Claude Opus 5.5 <[email protected]>
Co-authored-by: maria-rcks <[email protected]>
Co-authored-by: Julius Marminge <[email protected]>
* fix(web): retain diff selection across navigation (pingdotgg#22347)
Co-authored-by: Lukas Tomondy <[email protected]>
Co-authored-by: Julius Marminge <[email protected]>
* fix(mobile): subscription widget no longer expires on a window that already reset (pingdotgg#22993)
Co-authored-by: Claude Opus 5.5 <[email protected]>
* fix(opencode): verify CLI updates when loopback server is still running (pingdotgg#22839)
Co-authored-by: maria-rcks <[email protected]>
Co-authored-by: Julius Marminge <[email protected]>
* fix(usage): Claude subagent output is no longer undercounted (pingdotgg#20276)
Co-authored-by: Julius Marminge <[email protected]>
Co-authored-by: Claude Opus 5.5 <[email protected]>
* fix(server): a remote update points the service unit at the runtime it committed (pingdotgg#19652)
Co-authored-by: Julius Marminge <[email protected]>
* fix(server): a limited provider's queue stays held after another provider's turn succeeds (pingdotgg#22425)
Co-authored-by: Mantas Kantautas <[email protected]>
Co-authored-by: maria-rcks <[email protected]>
Co-authored-by: Julius Marminge <[email protected]>
Co-authored-by: Claude Opus 5.5 <[email protected]>
* fix(shared): keep spreadsheet shorthand as inline code (pingdotgg#23203)
Co-authored-by: Claude Opus 5.5 <[email protected]>
* fix(web): offer retry while an environment reconnects (pingdotgg#23194)
Co-authored-by: Claude Opus 5.5 <[email protected]>
* fix(server): custom Codex providers no longer report native quota (pingdotgg#18622)
Co-authored-by: Claude Sonnet 5.5 <[email protected]>
Co-authored-by: Julius Marminge <[email protected]>
* fix(desktop): Cmd+F now searches the page in the integrated browser (pingdotgg#22960)
Co-authored-by: Claude Opus 5.5 <[email protected]>
Co-authored-by: Julius Marminge <[email protected]>
* fix(desktop): an SSH password prompt that ended leaves the dialog instead of stacking (pingdotgg#34192)
Co-authored-by: Claude Opus 5.5 <[email protected]>
Co-authored-by: Julius Marminge <[email protected]>
* fix(web): render Claude insight blocks as a callout (pingdotgg#22239)
Co-authored-by: macodev00 <[email protected]>
Co-authored-by: maria-rcks <[email protected]>
Co-authored-by: Julius Marminge <[email protected]>
* fix(scheduler): show short server timezone on fixed-time labels (pingdotgg#23111)
Co-authored-by: Shaun Hawk <[email protected]>
Co-authored-by: Cursor <[email protected]>
Co-authored-by: maria-rcks <[email protected]>
Co-authored-by: Julius Marminge <[email protected]>
* fix(web): focus the primary action when confirmation dialogs open (pingdotgg#18187)
Co-authored-by: Roger Vilaseca <[email protected]>
Co-authored-by: Claude Opus 5.5 <[email protected]>
Co-authored-by: Julius Marminge <[email protected]>
* fix(web): Changes row matches the diff comparison (pingdotgg#19553)
Co-authored-by: Julius Marminge <[email protected]>
Co-authored-by: Claude Opus 5.5 <[email protected]>
* fix(server): imported ACP sessions show their native history (pingdotgg#22155)
Co-authored-by: Claude Opus 5.5 <[email protected]>
Co-authored-by: maria-rcks <[email protected]>
Co-authored-by: Alan Justino da Silva <[email protected]>
Co-authored-by: Julius Marminge <[email protected]>
* fix(preview): always return evaluated results by value (pingdotgg#22948)
Co-authored-by: Claude Opus 5.5 <[email protected]>
* fix(provider-core): a model reply of "title" no longer replaces the thread title (pingdotgg#25743)
Co-authored-by: Claude Opus 5.5 <[email protected]>
* fix(desktop,web): Open in runs locally for a background service sharing the desktop's T3 home (pingdotgg#21661)
Co-authored-by: maria-rcks <[email protected]>
Co-authored-by: Julius Marminge <[email protected]>
* fix(web): question answers submit while normal sends are blocked (pingdotgg#22874)
Co-authored-by: Claude Opus 5.5 <[email protected]>
Co-authored-by: Julius Marminge <[email protected]>
* fix(server): cancelling a background-only delegated task reports it interrupted (pingdotgg#21676)
Co-authored-by: Claude Opus 5.5 <[email protected]>
Co-authored-by: maria-rcks <[email protected]>
Co-authored-by: Julius Marminge <[email protected]>
* fix(web): fall back to a readable server for shared repositories (pingdotgg#21530)
Co-authored-by: maria-rcks <[email protected]>
Co-authored-by: Julius Marminge <[email protected]>
* fix(web): composer follows an optionless thread instead of the settings default (pingdotgg#16546)
Co-authored-by: Julius Marminge <[email protected]>
* fix(web): don't save retention age until committed (pingdotgg#22208)
Co-authored-by: macodev00 <[email protected]>
Co-authored-by: Julius Marminge <[email protected]>
Co-authored-by: Claude Opus 5.5 <[email protected]>
* fix(server): one dropped probe no longer lists a live linked peer as unreachable (pingdotgg#34208)
* chore(release): prepare v0.1.9
* fix(server): preview automation reports ambiguous selectors instead of calling them invalid (pingdotgg#34205)
* fix(opencode): a context overflow that OpenCode compacts no longer fails the turn (pingdotgg#26743)
Co-authored-by: Claude Opus 5.5 <[email protected]>
* fix(web): Ctrl + "+" zooms on keyboard layouts with a dedicated plus key (pingdotgg#26408)
Co-authored-by: Claude Opus 5.5 <[email protected]>
* fix(ci): release version bump push retries when main moves (pingdotgg#34326)
Co-authored-by: Claude Fable 5.2 <[email protected]>
* fix(server): CLI commands no longer migrate the database of a running server (pingdotgg#26763)
Co-authored-by: Claude Opus 5.5 <[email protected]>
* fix(web): keep saved default model when changing effort (pingdotgg#22193)
Co-authored-by: macodev00 <[email protected]>
Co-authored-by: Julius Marminge <[email protected]>
Co-authored-by: Claude Opus 5.5 <[email protected]>
* fix(web): reveal expanded work rows hidden behind the composer (pingdotgg#21968)
Co-authored-by: maria-rcks <[email protected]>
Co-authored-by: Julius Marminge <[email protected]>
* fix(composer): steer instead of queueing during automatic compaction (pingdotgg#24138)
Co-authored-by: maria-rcks <[email protected]>
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* feat(gitlab): resolve overview threads from Summary and Timeline (pingdotgg#30575)
Co-authored-by: Claude Opus 5.5 <[email protected]>
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* fix(web): pull request search keeps partial-word matches after GitHub answers (pingdotgg#26992)
Co-authored-by: Claude Opus 5.5 <[email protected]>
* fix(server): Claude subagents no longer show the parent's effort (pingdotgg#17042)
Co-authored-by: Claude Opus 5.5 <[email protected]>
Co-authored-by: Julius Marminge <[email protected]>
* fix(server): runs cancelled by a server restart say why in the thread (pingdotgg#27192)
Co-authored-by: Claude Opus 5.5 <[email protected]>
* fix(client-runtime): server updates stop waiting 32 minutes when the host returns without this update's outcome (pingdotgg#27275)
Co-authored-by: Claude Opus 5.5 <[email protected]>
* fix: preserve Claude dead-query errors after upstream sync
* fix: retain quick-message IPC trust and Cursor steering fixture
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bugfixFix PR opened by an issue lead; enters the PR looppr:gate-failedA land gate failedsize:S10-29 changed lines (additions + deletions).vouch:trustedAuthor is trusted by repo permissions or the VOUCHED list.
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Problem
In dark mode, MCP App cards on web and desktop are bright white blocks from the moment the frame loads until the app sends
ui/initialize. For apps with a large bundle that is seconds. The<iframe>getscolor-scheme: darkfrom the host, but the app document has no color scheme until the theme bootstrap hears from the host, so Chromium paints the child canvas opaque white.Reproduced on main
1a43f4870din the web app: a Claude thread called a synthetic MCP tool whoseui://app sendsui/initialize4 s after load. In dark mode both cards stayed white for about 4 s after switching back to the thread, and again after a full page reload. Light mode was unaffected.Change
McpAppFrameadds at3-color-scheme=<light|dark>query parameter to the frame URL when it first adopts it. The frame still keeps that one URL; later theme changes keep flowing throughui/notifications/host-context-changed.<meta name="color-scheme" content="…">to the app's head before the app's own scripts run and before first paint. It uses a meta tag rather than an inline style on<html>, which would replace an app's own<html style>attribute. The captured fixture app sets no styles or color scheme of its own, so an app that setscolor-schemein its own CSS is not shown below.The server route ignores the query string (the asset token is in the path), so older servers keep today's behaviour. Mobile sets no color scheme on its inner frame and is unchanged.
Scope and approval
Fixes #33303
Verification
vp test run packages/shared/src/mcpApp.test.ts apps/server/src/http.test.ts: 39 passed, including a new test that the bootstrap applies onlylight/darkfrom the frame URL before any message arrives.e829b7b38f(main merged; upstream changes touch only mobile files):vp test run packages/shared/src/mcpApp.test.ts15 passed;vp run check:changed: format, lint, knip, typecheck (35 packages), tests and React compiler all pass; CI 35/35 green.e829b7b38f: two independent reviewers, both merge, no findings. Both name the same trade-off, row C6 below. Neither change touches auth, sandboxing, CSP or the MCP tool surface; the parameter parse is linear (about 2 ms on 3000 malformed tokens).e829b7b38f: all 57 PNGs and 10 recordings inspected; every delivered diff image recomputes exactly. C2–C5 are sufficient. An independent rebuild of C1 paints both cards dark beforeui/initialize, as captured, but differs by 5,977 pixels: its seed turn (a real provider turn) wrote an extra "Worked for" row that moves the cards down 42 px. The C6 frames show the loading text losing contrast in the pre-initialize window, as described.807635d674; the later commits on the branch are a comment wording change and a merge of main that does not touch the changed files.C1, T3 dark on a light browser preference, about 2 s after returning to the thread:
1a43f4870d807635d6741a43f4870d↔807635d6741a43f4870d↔807635d674Recordings: C1-before.mp4 · C1-after.mp4
Diff0 is threshold 0, DiffT threshold 8/255, both amplified 32×. Only the two app canvases change; there are zero changed pixels outside them at threshold 0.
ui/initializeFull evidence index with every recording, trace and timestamp: Evidence.md. Fixture matrix: fixture-matrix.md. Seeding and driver scripts, including the synthetic MCP server: seeding-and-drivers.zip.
Not checked: the Electron desktop app itself (Chromium covers its render path), Safari, native mobile (unchanged code path), and a real Datadog app.
AI-assisted; verified with the tests and tools listed above.
🤖 Generated with Claude Code