After the useRenderActivityMessage fix, MCPAppsActivityRenderer receives the
per-thread clone instead of the registry agent. The mock's clone() did not share
isRunning state, causing waitForAgentIdle(clone) to never resolve (emit() only
updated registry.isRunning). Also, tests that monkey-patch runAgent before
renderWithCopilotKit need the clone to delegate proxied MCP requests to the
registry (to pick up the monkey-patch) while running user-message flows on the
clone itself (so clone.messages is updated and rendered by CopilotKit).
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
- Fingerprint all tool-call args on last message (not just last tool call)
so parallel/non-last tool-call streaming is detected and triggers re-render
- Add dev warning when scroll container has clientHeight=0 so virtualization
silently disabled (e.g. chat inside display:none tab) is surfaced early
- Use callback ref for non-autoScroll path in ScrollView to eliminate
useLayoutEffect + eslint-disable; autoScroll path keeps useLayoutEffect
since StickToBottom manages that ref internally
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Adds a jsdom-compatible test that confirms the virtual code path activates
above VIRTUALIZE_THRESHOLD without requiring a real browser viewport. Mocks
clientHeight and getBoundingClientRect on the scroll element to pass both
CopilotChatMessageView's guard and TanStack Virtual's observeElementRect.
Asserts the virtual container div exists and rendered count < TOTAL.
Drains pending rAF callbacks before unmount to prevent spurious uncaught
exceptions after jsdom teardown.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Adds a minimal demo at /a2ui-demo that uses the demo-button agent to
reproduce and validate the A2UI thread-clone bug fix. The agent renders
an A2UI surface with a Confirm button on first run; clicking it fires a
second run that emits a text confirmation message.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
scrollToIndex was firing on every streaming chunk (deduplicatedMessages.length
dep), forcibly yanking users to the bottom even when scrolled up to read
history. Removed the dep — use-stick-to-bottom handles streaming auto-scroll
via content height growth on the virtualizer's total-size div, same as the
flat path. scrollToIndex now only fires on virtual mode activation and thread
switches.
Also removed a stale comment referencing toolResultMap (removed two commits
ago) and replaced it with an accurate description of the linear scan.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
- All callbacks (processFiles, handleFileUpload, handleDragOver, handleDragLeave,
handleDrop, removeAttachment, consumeAttachments) are now wrapped in useCallback
with empty deps — referentially stable across renders
- Config values read from configRef to avoid dep array changes
- consumeAttachments no-ops on empty queue (returns same state reference)
- 9 new tests: referential stability across re-renders, re-render counting
(consumeAttachments on empty queue triggers zero re-renders), initial state,
consumeAttachments behavior, removeAttachment no-op
useRenderActivityMessage was calling copilotkit.getAgent() directly,
always returning the registry agent. When a user clicked an A2UI button,
handleAction → runAgent executed on the registry agent — messages
accumulated there while CopilotChat displayed from the per-thread clone
(created by useAgent), so responses appeared to silently vanish.
Apply the same getThreadClone(registryAgent, threadId) ?? registryAgent
pattern already used in useRenderCustomMessages.
Adds a regression test that asserts the renderer receives the clone,
and confirms the test catches the bug when the fix is reverted.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
- New docs/(root)/migration-guides/ section with migrate-to-v2, migrate-attachments,
migrate-to-1.10.X, migrate-to-1.8.2
- Troubleshooting now only contains error-debugging, observability-connectors, common-issues
- Update all @deprecated JSDoc URLs from /troubleshooting/ to /migration-guides/
- Update doc cross-links (multimodal-attachments page, snippet import)
- Move snippet to snippets/shared/migration-guides/
- Set minimum version to v1.56.0 (was vX.Y.Z placeholder)
- Restore console.error as safety net in processFiles catch blocks (errors no longer
silently vanish when onUploadFailed callback is not provided)
- Add try/catch to useBlobUrl atob() — gracefully handles malformed base64 instead of
crashing the component tree
- Fix DocumentLightboxContent: use blobUrl instead of undefined src variable
- Add .catch() to View Transition API transition.finished promise
- Codemod: preserve actual imageUploadsEnabled value (false, dynamic expressions)
instead of hardcoding true — adds 3 new test cases (18 total)
- Replace all placeholder @deprecated versions (v1.x.0) with @since 1.56.0
- Add missing @since to ImageRenderer, ImageRendererProps, AIMessage.image tags
Attachment queue & previews:
- Image lightbox with View Transition API morph animation
- Video lightbox with native controls and play button overlay
- Document lightbox (PDF via blob URL, text inline, info card fallback)
- Drop zone overlay with upload icon
- Filename preservation via InputContent metadata
- Proper video thumbnail sizing and play/pause indicator
- Fix attachment queue positioning (max-w-3xl constraint)
- Padding between X button and content for audio/document cards
- Document filenames wrap instead of truncating
Attachments config:
- onUploadFailed callback for validation/upload errors (file-too-large, invalid-type, upload-failed)
- onUpload accepts sync or async returns
- AttachmentUploadResult discriminated union with explicit interfaces
- Metadata field on Attachment and onUpload return type
AG-UI version bump:
- Bump @ag-ui/client, @ag-ui/core, @ag-ui/encoder, @ag-ui/proto to 0.0.51
- Remove process.env Vite workaround (fixed upstream in 0.0.51)
Deprecation lifecycle:
- @deprecated JSDoc on all legacy image upload APIs
- ImageRenderer, ImageRendererProps, ImageUpload type, imageUploadsEnabled prop,
inputFileAccept prop, ImageRenderer prop, AIMessage.image, ImageData
- Codemod at codemods/migrate-attachments.ts (15 tests)
- Migration guide updated with codemod instructions and new type shapes
Docs:
- New guide: docs/(root)/multimodal-attachments.mdx
- Updated migration guide with onUpload return type, metadata, codemod section
- Cross-links from prebuilt-components and migration guide
- Label change: "Add photos or files" → "Add attachments"
Tests:
- CopilotChat.attachments.test.tsx — 5 tests for onUploadFailed
- migrate-attachments codemod — 15 tests
Wire multimodal attachment support into the v2 CopilotChat component:
- Add AttachmentsConfig prop to CopilotChat for enabling file attachments
- Implement processFiles with accept filter, size validation, placeholder/ready lifecycle
- Support custom onUpload handlers and default base64 encoding
- Build InputContent[] when attachments accompany a message
- Add drag-and-drop handlers with visual feedback (dashed outline)
- Add clipboard paste handler for file items
- Render CopilotChatAttachmentQueue between scroll view and input
- Forward onAddFile through CopilotChatView to CopilotChatInput's AddMenuButton
- Omit internal attachment state props from CopilotChatProps public API
- Fix stale closure in paste handler by using processFilesRef pattern
- Wrap processFiles calls in try/catch across paste, file upload, and drop handlers
- Add early return for empty/falsy accept string in matchesAcceptFilter
- Block send while attachments are still uploading
- Add id field to Attachment interface, replace _id hack with randomUUID()
- Add 10s timeout to generateVideoThumbnail to prevent infinite hanging
- Show placeholder div for uploading attachments instead of rendering incomplete source
- Include filename context in upload error messages
Wrap all three new URL() call sites in try/catch so a malformed URL string
skips the part with a console.warn rather than crashing message conversion.
Add a default switch case to warn on unrecognized content part types.
Add a test covering the malformed-URL skip behaviour.
Re-export AG-UI multimodal input types (InputContent, TextInputPart, ImageInputPart,
AudioInputPart, VideoInputPart, DocumentInputPart, InputContentSource, etc.) from
@copilotkit/shared. UserMessage is now a plain pass-through of agui.UserMessage,
removing the CopilotKit-specific image?: ImageData extension. ImageData is kept with
@deprecated for backward compatibility with AIMessage.image.
When users explicitly set autoFocus={true}, the textarea now focuses
with { preventScroll: true } so the page doesn't jump. Also applies
to the modal-open focus path. Added tests verifying default no-focus
behavior and that opt-in focus uses preventScroll.
https://claude.ai/code/session_01LPiJ8GcUNtWdS2W6MYSE4b
During streaming, the same message ID can arrive multiple times as tool calls are appended.
The previous "keep last" dedup lost any text content that was streamed before the first tool call,
because later entries carry empty content. Replace with a merge strategy: for assistant messages,
recover non-empty content from earlier occurrences while keeping the latest toolCalls accumulation.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Martha Schumann