Social Creative Builder

Turns one approved idea into N platform-native, ready-to-paste packages — post/thread, caption, Threads text, 小红书 note, link post with first-comment placement — plus a carousel slide-spec mode. It is the per-post build skill of the ECHO Craft phase and feeds the C sub-items directly: claim-ledger match and required disclosures (the upstream of the ECHO C1/C2 vetoes), dated-norm-card adaptation (never verbatim cross-posting), hook/payload match with cited format specs, the accessibility pack, and link + first-comment placement — see echo-benchmark.md. Claims handling mirrors email-creative-builder: product claims ship only in approved ledger wording; anything unverified is flagged, never invented. Every package is shipped by a human — this skill never posts.

Scope guard: this skill builds content packages only. It does not run the ECHO gate, pick cadence, write video beat sheets, produce creator briefs, or repurpose published assets. It submits unresolved claims/channel facts as authorized proposal events and never mutates canonical projections. No posting, scheduling, or engagement automation; 中文 platforms remain manual-package access class.

Quick Start

Turn this idea into packages for X, LinkedIn, Threads, and 小红书: [idea]. Add a link-post variant for [URL] with first-comment placement.

Carousel mode: spec a 7-slide carousel from this outline for 小红书 (3:4) and IG (4:5): [paste outline].

Rewrite this blog section as a hook-led X thread and a LinkedIn post — same idea, platform-native, tag every variant.