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S1: person+garment images directly into ref2va with attribute_transfer produce correct face/outfit/motion in one call — no separate compose step needed. S2: reference_video_urls has a real, strong effect on output motion (A/B tested). S4: H3 Console's own POST /v1/assets endpoint (undocumented until now) solves asset reachability without exposing our own uploads/ publicly. Evidence and scripts in spike/s1-s2-s4-2026-09-02/. Propagated the one-step design into the requirements doc, MVCP design doc, the architecture doc, and H3-CONSOLE.md; dev-plan.md's spike section marked done and its task table updated accordingly.
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Duration: fixed 10s (within H3's 4-15s hard constraint), frames=240 @ 24fps. Prompt: follows the internal H3 prompt-writing methodology already sitting in the repo (docs/h3skill.md, from a parallel session) — the "all-purpose reference mode" six-section structure. Character appearance details are auto-captioned from the Stage1 composed image (new composed_images. appearanceDescriptor field); dance motion phrasing is admin-authored once per reference video (new dance_refs.motionDescriptor field), since the format requires concrete descriptors and forbids "as shown in the picture." Flagged as needing a pass through h3skill.md's own 22-item mechanical acceptance checklist before production use, not claimed as fully compliant. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01SdtXTsDRz5QWMjvt1HBXLz
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Previously left as inline "勘误" patch notes; now the baseline doc (docs/done) states the current 480x832 default outright, and the dance-room docs describe live.html/dance.html as two independently configured H3_GEN_PARAMS that happen to agree, rather than flagging an erratum. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01SdtXTsDRz5QWMjvt1HBXLz
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Data model, front/back-end view inventory, button-level control design, and per-user-type process flows for the not-yet-built feature. Also corrects the requirements doc's stale "live.html stays landscape" claim now that H3_GEN_PARAMS was changed to portrait there too (commit 1dc7084). Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01SdtXTsDRz5QWMjvt1HBXLz
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Documents the new outfit-swap dance live room (dance.html) requirements alongside the existing text-prompt live channel baseline, plus the combined system architecture covering both. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01SdtXTsDRz5QWMjvt1HBXLz