[dougyau]

Native Pi worker conversations showed (empty response) between tool activity, and ingestion discarded available assistant diagnostics.

Keep canonical messages and capture bookkeeping intact. A shared presentation rule hides only settled native assistant messages with no text or attachments, while reserving their IDs against local copies. Native assistant ingestion preserves omitted-content, error, cancellation, and length-limit diagnostics as ordinary [T3 notice] paragraphs. User messages and tool results keep their existing behavior.

Verification

• 189 tests passed across the native ingestion, web timeline, mobile feed, and shared predicate suites.
• Four affected package typechecks, focused lint, LSP diagnostics, and diff checks passed.
• Independent review approved the complete diff with no material findings.
• Committed files match the reviewed candidate byte-for-byte. The formatter-only commit hook was bypassed for this commit to preserve those reviewed bytes; no lint or typecheck gate was skipped.

No screenshots or browser/device verification, as requested. Historical discarded diagnostics cannot be recovered. Search fallback behavior remains outside this fix.

Implemented with GPT-6.1-sol in Pi using Pitako Developer Head. Coordinated and published with GPT-6.1-sol in Pi.