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heygen-avatar

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更新日2026年6月23日 22:43

HeyGen avatar-video provider reference for Synthex. Documents the real env-driven HeyGen v2 client and its ElevenLabs voice pairing. NEVER call createAvatarVideo without a consent record. NEVER hard-code HEYGEN_API_KEY (Vercel env only). NEVER silently mock a live call — no key hard-blocks unless allowMockFallback is explicitly set. ALWAYS prefer an ElevenLabs audio_url (lip-sync) over HeyGen text TTS. Activate on ANY request to generate, poll, or debug HeyGen avatar videos, or wire avatar+voice generation.

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SKILL.md

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name	heygen-avatar
description	HeyGen avatar-video provider reference for Synthex. Documents the real env-driven HeyGen v2 client and its ElevenLabs voice pairing. NEVER call createAvatarVideo without a consent record. NEVER hard-code HEYGEN_API_KEY (Vercel env only). NEVER silently mock a live call — no key hard-blocks unless allowMockFallback is explicitly set. ALWAYS prefer an ElevenLabs audio_url (lip-sync) over HeyGen text TTS. Activate on ANY request to generate, poll, or debug HeyGen avatar videos, or wire avatar+voice generation.
metadata	{"author":"synthex","version":"1.0","type":"reference-skill","epic":"SYN-1005","triggers":["heygen","avatar video","avatar lip-sync","generate avatar","video_status","elevenlabs voice clone"],"requires":[]}
context	fork

HeyGen Avatar Provider

Client

lib/marketing-agency/heygen/client.ts → createHeyGenClient(config?) returns:

createAvatarVideo(request) → { id, provider:'heygen', status }
getVideoStatus(videoId) → { status: queued|processing|completed|failed, videoUrl? }
waitForCompletion(videoId, { timeoutMs, intervalMs, sleep? }) → final job (bounded poll)

config: { apiKey?, baseUrl?, fetchImpl?, allowMockFallback? }. apiKey defaults to process.env.HEYGEN_API_KEY. fetchImpl is injectable for tests.

Request shape

{
  avatarId: string,
  script: string,                 // used only for the text→TTS path
  consent: HeyGenConsentMetadata, // REQUIRED — { subjectName, sourceRef, confirmedAt }
  audioUrl?: string,              // PREFERRED — ElevenLabs audio for lip-sync
  voiceId?: string,               // HeyGen voice for the text path (no audioUrl)
  dimension?: { width, height },  // default 1280×720
  title?: string,
}

Voice pairing (preferred path)

ElevenLabs is the voice source (lib/services/ai/voice-generation.ts → generateSpeech returns audioBase64). The composition helper lib/marketing-agency/studio/avatar-video.ts (generateAvatarVideo) does: generateSpeech → upload to a public URL → createAvatarVideo({ audioUrl }). Prefer this (real cloned voice + lip-sync) over HeyGen's built-in text TTS.

Hard rules (NEVER)

NEVER call createAvatarVideo without consent — it throws HeyGenConsentError by design.
NEVER hard-code the API key — HEYGEN_API_KEY lives in Vercel env only.
NEVER make a silent mock stand in for a live call. No key → HeyGenConfigurationError (matches the Artlist provider gate). The mock job is returned only when allowMockFallback: true is explicitly passed (dev/preview).
NEVER publish a video still in queued/processing — poll to completed first.

Status mapping

HeyGen completed|success → completed; failed|error → failed; pending|waiting|processing → processing.

Cost awareness

HeyGen renders + ElevenLabs synthesis are billed per use. Track cost-of-generation per client (margin vs retainer) — see client-content-studio. Don't loop renders without a cap.

Testing

Inject fetchImpl (and sleep for waitForCompletion) — never hit the network in unit tests. See tests/unit/lib/heygen-client.test.ts.

Anti-patterns

❌ Throwing away the consent gate to "simplify" — it's a legal/likeness control.
❌ Using HeyGen text TTS when an ElevenLabs cloned voice is available (off-brand voice).
❌ Blocking a serverless function on a long synchronous poll — prefer queue + status check.

Foundation & Gate Wiring (SYN-1050)

Adopted from the senior-skill standard so every artefact this skill produces is checked against the locked foundation before it lands.

Reads at every invocation (never cached — re-read each run):

.claude/memory/ceo-foundation.md — consent records, Aid Rule (Q3.1.1) on RestoreAssist, cross-client boundary (Phase 3.4), no fabricated client metrics.
.claude/memory/verification-gates.md — gate state for any claim referenced.

Output gate: every client-facing artefact this skill produces routes through brand-voice-enforce before the CEO batched-review queue. A REJECT blocks the artefact until the quoted offending string is fixed.

Evidence standard: every quantitative or factual claim carries exactly one tag — [VERIFIED] / [INFERENCE] / [UNCONFIRMED]. Untagged = defect (.claude/rules/fabel-evidence-standard.md). Never state a projected result as fact.

Spec: see spec.md in this skill directory.

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