th-9a5794: render stream_preamble ephemeral pre-answer sentence#35
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When the operator streams a fast-model preamble ahead of the answer (covering the reasoning model's time-to-first-token), show it in the assistant bubble's typing slot — muted + italic, in place of the bare typing dots — then swap in the real answer the instant it starts streaming. A late preamble frame (arriving after the answer began) is ignored, matching the server-side guard. Requires @smooai/smooth-operator >= 1.22.15 (adds stream_preamble to the event union so the SDK client forwards the frame instead of dropping it as unknown). Verified: 172/172 widget tests pass against a 1.22.15 SDK, including 2 new tests (preamble shown then replaced by the answer; late preamble ignored). typecheck clean. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01WEUZgsyfGVab8uqSFPbr23
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What
Renders the new
stream_preambleframe from the operator. When the server streams a fast-model preamble ("what I'm about to do") ahead of the answer — covering the reasoning model's time-to-first-token — the widget shows it in the assistant bubble's typing slot (muted + italic, in place of the bare dots), then swaps in the real answer the instant it starts streaming. A late preamble frame (after the answer began) is ignored, matching the server guard.⛔ Blocked on
@smooai/smooth-operator1.22.15 (smooth-operator PR #234), which addsstream_preambleto the SDK event union. Until it publishes, the SDK client (client.jsisServerEventgate) drops the frame as unknown, andpnpm installcan't resolve the bumped dep. On publish:pnpm installto refresh the lockfile → CI green → mark ready.Verified
172/172 widget tests pass against a locally-built 1.22.15 SDK, including 2 new tests (preamble shown then replaced by the answer; late preamble ignored). Typecheck clean. The
event.type === 'stream_preamble'check is written version-independently (small cast) so it compiles against the current pinned SDK too.🤖 Generated with Claude Code
https://claude.ai/code/session_01WEUZgsyfGVab8uqSFPbr23