[Zammi1]

Problem

Persistent thread errors can contain long, multiline diagnostics, but the banner only exposed a visually clamped version. Users had no direct way to copy the complete diagnostic when reporting or debugging provider failures.

What changed

• add a copy control to the persistent thread error banner
• copy the complete diagnostic rather than the clamped presentation
• show success only after the clipboard write succeeds and show anchored failure feedback when it does not
• reset feedback when the thread or error changes and ignore stale or post-unmount clipboard completions
• preserve the existing session-scoped dismissal behavior
• document copy and dismissal behavior for web and desktop

Impact

Web and desktop users can copy provider-neutral thread diagnostics directly from the banner. No provider, contract, server, remote-mode, or mobile behavior changes.

Validation

• vp test run apps/web/src/components/chat/ThreadErrorBanner.test.tsx apps/web/src/hooks/useCopyToClipboard.test.ts — 16 tests passed
• tsgo --noEmit -p apps/web/tsconfig.json
• targeted vp lint for the changed web files
• git diff --check origin/main...HEAD

Evidence

Before

Persistent thread error with dismissal only.

After

Persistent thread error with copy and dismissal controls.

Generated by GPT-5.6 Sol via the Codex harness in T3 Code.

Note

Add copy-to-clipboard button to thread error banners

• Adds a ThreadErrorCopyButton to ThreadErrorBanner.tsx that copies the full diagnostic text to the clipboard, showing a check icon on success and an anchored toast on failure.
• Fixes race conditions in useCopyToClipboard by tracking operation IDs to ignore stale async completions and prevent state updates after unmount.
• Adds user-facing documentation for thread error banners in docs/user/thread-errors.md.

^{Macroscope summarized 5004dbf.}

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Note

Low Risk
UI-only clipboard and banner changes with no auth, API, or server impact; broader hook hardening is localized to copy feedback.

Overview
Thread error banners now include a copy control next to dismiss so users can grab the full multiline diagnostic (not just the line-clamped preview). Success shows brief copied feedback on the button; clipboard failures surface an anchored toast via showThreadErrorCopyFailure.

useCopyToClipboard is tightened with per-attempt operation IDs so stale writes, repeat failures, and unmount no longer flip isCopied or fire callbacks incorrectly. ChatView passes key={threadErrorBannerKey} on ThreadErrorBanner so copy UI resets when the thread or error text changes. Session-scoped dismissal behavior is unchanged.

User docs add thread-errors.md and link it from install next steps.

^{Reviewed by Cursor Bugbot for commit 5004dbf. Bugbot is set up for automated code reviews on this repo. Configure here.}

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[macroscopeapp]

One finding: the new copy icon picks up the ghost button's muted icon color instead of the alert's error tone, so it renders gray next to the red dismiss icon in the same banner.

^{Posted via Macroscope — UI Consistency}

[macroscopeapp]

Approvability

Verdict: Approved 64d53b2

Self-contained UI feature adding copy functionality to thread error banners. Uses existing hooks, includes comprehensive tests, and has no runtime behavior changes beyond the new copy button.

^{You can customize Macroscope's approvability policy. Learn more.}

Dismissing prior approval to re-evaluate 64d53b2

[juliusmarminge]

Note

This comment is posted by Julius' dot

The before/after images show the copy control, but no recording demonstrates copying the complete diagnostic or the timed success and failure feedback. Please attach a short client recording of those interactions under the verification rule, then request reconsideration.