Fix parser malformed runtime noise

[TraderSamwise]

Summary

• classify malformed Claude spinner/action animation captures as status instead of assistant responses
• add a minimized regression from historical runtime noise
• keep existing activity/action wording contract intact

Verification

• vitest run src/agent-output-parser.test.ts
• tsc --noEmit
• eslint src/ --max-warnings=0
• yarn build
• vitest run

Summary by CodeRabbit

• Tests

  • Added test coverage for malformed agent output with runtime status markers.

• Bug Fixes

  • Improved handling of runtime status messages in the agent output parser to correctly categorize them as status blocks rather than chat content.
  • Enhanced detection of progress indicators and thinking markers for improved message classification accuracy.

[vercel]

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Project	Deployment	Actions	Updated (UTC)
app	Ready	Preview, Comment	Jun 6, 2026 11:06am

[coderabbitai]

Wondering what really moved? Review this PR in Change Stack to inspect semantic changes, definitions, and references.

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ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: ff0a01aa-b5fb-4bb8-802b-46a67128a663

📥 Commits

Reviewing files that changed from the base of the PR and between 0add3c3 and 62d7b26.

📒 Files selected for processing (2)

• src/agent-output-parser.test.ts
• src/agent-output-parser.ts

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📝 Walkthrough

Walkthrough

The PR enhances the agent output parser to detect and properly classify runtime noise fragments. A new looksLikeRuntimeNoiseText helper identifies raw blocks containing runtime markers (special bullet characters, (thinking), terminal-notifier) and reclassifies them as status blocks. A corresponding test validates this behavior with malformed Claude animation fragments.

Changes

Runtime Noise Detection in Agent Output Parser

Layer / File(s)	Summary
Runtime noise detection logic src/agent-output-parser.ts	A new looksLikeRuntimeNoiseText helper detects runtime-like markers (special bullets, (thinking), terminal-notifier) in raw blocks and triggers reclassification to status type during transcript normalization.
Runtime noise detection test src/agent-output-parser.test.ts	New test case validates that malformed Claude animation fragments with Brewing…, (thinking), and terminal-notifier are parsed into meta and status blocks with expected substrings.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~8 minutes

Possibly related PRs

• TraderSamwise/aimux#73: Both PRs involve parseAgentOutput block typing—this PR adds runtime-noise→status reclassification while the retrieved PR tests that parsed block types/content are preserved in metadata-server endpoints.
• TraderSamwise/aimux#77: Both PRs extend src/agent-output-parser.test.ts coverage for Claude animation/spinner fragments being classified as status (non-chat) blocks.
• TraderSamwise/aimux#71: Both PRs modify normalizeTranscriptBlocks to reclassify runtime-noise and tool-action fragments from raw/chat into status with matching test coverage.

Poem

🐰 Noisy transcripts scatter far and wide,
But clever parsing sorts them with pride.
Runtime clutter becomes clean status text,
Agent output flows, what comes next?
Hop-hop, tests confirm the way! ✨

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title directly matches the PR's main objective: fixing the parser to properly classify malformed runtime noise (Claude animation/progress footers) as status blocks instead of assistant responses.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch test/chat-parser-next-audit

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