fix(chat): add trailing newline to a2ui JSONL for parser compatibility#122
Merged
Conversation
The A2UI message parser is line-based — it processes complete lines at \n boundaries. The hardcoded CONTACT_FORM_JSONL ended without a trailing newline, leaving the last line (updateComponents) in the parser buffer unprocessed. The surface was created with no components, causing surfaceToSpec() to return null and nothing to render. Fix: append "\n" after the joined JSONL string. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
|
The latest updates on your projects. Learn more about Vercel for GitHub.
|
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
1 participant
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
Summary
The A2UI parser is line-based — it buffers content and processes at
\nboundaries. The hardcoded JSONL ended without a trailing newline, leaving theupdateComponentsmessage (the last line) permanently stuck in the parser buffer. The surface was created but had zero components, sosurfaceToSpec()returned null and the form never rendered.Root cause:
"\n".join([...])produces no trailing\nafter the last element.Fix: Append
+ "\n"after the join.Verified via Chrome DOM inspection:
a2ui-surfaceexisted in DOM with<!---->(empty) becauserender-specnever received a spec — surfaceToSpec returned null due to missingrootcomponent.🤖 Generated with Claude Code