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>
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
Replace eslint and prettier with oxlint and oxfmt for faster linting
and formatting across the monorepo. Remove all eslint and prettier
configs, dependencies, and related packages. Add .oxlintrc.json and
.oxfmtrc.json for the new tooling. Update CI workflows and lefthook
hooks accordingly. Reformat codebase with oxfmt.
https://claude.ai/code/session_01GMkSf29p78HuMR1mbXn8He
The previous publish workflow released 1.55.0-next.8 to npm but the
post-release commit failed to push to main (blocked by branch
protection). This applies the version bumps and pre.json updates that
the workflow would have committed, unblocking future releases.
https://claude.ai/code/session_01N8sLK9h9p6FdRjyHqzKzVV
## Summary
- Adds a new example app at `examples/v2/react-router` demonstrating
CopilotKit with React Router v7 (SSR/framework mode) and TanStack AI as
the default agent
- `TanStackAIAgent` wraps TanStack AI's `chat()` via a factory callback
pattern, giving users full type safety over adapter/model configuration
- CopilotKit runtime is mounted as a Hono route on the same server that
serves React Router SSR
## Key files
| File | Purpose |
|------|---------|
| `app/agent.ts` | `TanStackAIAgent` — thin `AbstractAgent` wrapping a
`chat()` factory, with AG-UI event normalization |
| `app/server.ts` | Hono server config mounting CopilotKit endpoint +
React Router SSR |
| `app/routes/_index.tsx` | Full-page `CopilotChat` UI |
## Notes
Discovered that TanStack AI's AG-UI events have subtle differences from
`@ag-ui/core` spec (extra fields, own type definitions instead of
importing from `@ag-ui/core`, own `runId`/no `threadId`). The
`TanStackAIAgent` normalizes these by consuming only text/tool deltas
from the stream and re-emitting clean `@ag-ui/client`-compatible events.
Will follow up with TanStack AI team on aligning their event types with
`@ag-ui/core`.
## Test plan
- [x] `pnpm build` passes
- [x] Dev server starts and serves the app
- [x] CopilotChat renders and streams responses from TanStack AI via
CopilotKit runtime
- [x] TypeScript type checks pass with zero errors
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Add a new example app at examples/v2/react-router demonstrating CopilotKit
with React Router v7 (SSR/framework mode) and TanStack AI as the default agent.
- React Router v7 SSR with Hono server via react-router-hono-server
- CopilotKit runtime mounted as a Hono route on the same server
- TanStackAIAgent: thin AbstractAgent wrapper that accepts a chat() factory
callback, giving users full type safety over TanStack AI's adapter/model config
- Proper AG-UI event normalization bridging TanStack AI's event format to
what CopilotKit's @ag-ui/client pipeline expects
- Full-page CopilotChat UI with Tailwind CSS v4
Incorporates the V1/V2 flat package consolidation (96885b595). All our
thread-isolation changes auto-merged to the new package paths. Three
content conflicts resolved (import paths updated from @/ aliases to
relative paths and @copilotkitnext/* to @copilotkit/*):
- packages/react-core/src/v2/hooks/use-agent.tsx
- packages/react-core/src/v2/hooks/use-render-custom-messages.tsx
- packages/react-core/src/v2/components/chat/CopilotChatMessageView.tsx
File location conflict resolved: use-agent-thread-isolation.test.tsx
moved from packages/v2/react/... to packages/react-core/src/v2/...
With per-thread agent clones, the registry agent has empty messages.
reloadSuggestions was checking messageCount on the registry agent, so
dynamic suggestions (which require messageCount > 0) never fired after
the first message. Fix by passing the thread clone (with actual messages)
through reloadSuggestions → generateSuggestions.
Also updates the demo to use claude-3-7-sonnet (extended thinking support)
when ANTHROPIC_API_KEY is set.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
After the V1/V2 consolidation merge, several changesets still referenced
old @copilotkitnext/* package names that no longer exist. Fixed package
references and ran changeset version to apply pending version bumps.
https://claude.ai/code/session_01A5aahBWFTmLPR3xZSeh4SD
Flatten all packages from packages/v1/* and packages/v2/* into packages/* —
every package now lives directly under the @copilotkit/ scope with no v1/v2
subdirectories.
- Move all v1 packages (react-core, react-ui, runtime, shared, etc.) from
packages/v1/* to packages/*
- Absorb v2 react code into packages/react-core/src/v2/ (exported via /v2 subpath)
- Absorb v2 agent code into packages/runtime/src/agent/ (exported via /v2 subpath)
- Move v2 packages (core, angular, demo-agents, etc.) to packages/*
- Replace all @copilotkitnext/* imports with @copilotkit/* equivalents
- Keep @copilotkitnext/angular as the sole exception (angular remains on next)
- Update CI workflows, renovate config, release scripts for flat structure
- No public API surface changes — all exports fields are preserved
Co-authored-by: Alem Tuzlak <t.zlak@hotmail.com>
Signed-off-by: Tyler Slaton <tyler@copilotkit.ai>
Run prettier on ~1,865 files across examples/ to match the monorepo's
formatting standards. These files were imported as-is from standalone
repos that used different prettier configs.
Markus Ecker