fix: filter HEARTBEAT_OK and NO_REPLY sentinel messages from chat UI#24
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Adds rendering-layer filtering so agent sentinel responses (HEARTBEAT_OK, NO_REPLY) are hidden from the message list. Raw data is preserved in the hook and cache — only the visual rendering is affected. - New isSentinelMessage() utility in src/lib/sentinel.ts - ChatView filters messages via useMemo before rendering - Unit tests for sentinel detection (7 cases) Closes #21
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Summary
Filters agent sentinel responses (
HEARTBEAT_OK,NO_REPLY) from the ClawChat message list. These are internal protocol signals — not meaningful conversation — and showing them as chat bubbles is noisy and confusing.Implementation
src/lib/sentinel.ts—isSentinelMessage()utility that checks if trimmed text exactly matches a known sentinel. Uses aSetfor O(1) lookup and is easily extensible for future blocklist entries.src/components/ChatView.tsx— Filters messages viauseMemobefore rendering. Raw data is preserved in the hook/cache (filtering happens at the rendering layer per the issue spec).src/test/sentinel.test.ts— 7 unit tests covering exact match, whitespace trimming, partial matches, case sensitivity, and null/empty handling.Acceptance Criteria
HEARTBEAT_OKmessages do not appear in the chat UINO_REPLYmessages do not appear in the chat UICloses #21