higgsfield-facs

higgsfield-facs is a skill for Claude Code from OSideMedia/higgsfield-ai-prompt-skill. It costs 155 tokens per session (7,163 once invoked), scanned B, original, MIT.

A facial-direction guide for Seedance 2.0 video prompts using FACS, a system that describes individual facial muscle movements with codes. For example, AU12 raises the corners of the lips and AU6 raises the cheeks.

In plain words
What is it for?
Use it to direct precise facial acting in Seedance prompts, especially for close-up dialogue, uncanny expressions, subtle reactions, and combinations of facial movements.
Why use it?
It lets you describe the exact physical movement of a face instead of relying only on broad emotion words. This is useful when a performance needs a forced smile, mixed expression, or small close-up reaction.

Skill for Claude Code

Written for Claude Code: user-invocable in frontmatter.

Needs its repository: it reads a path above its own folder, which exists only inside the repository. The line is **This skill is a facial-control layer on top of `../higgsfield-seedance/SKILL.md`.**.

Good fit Use it to direct precise facial acting in Seedance prompts, especially for close-up dialogue, uncanny expressions, subtle reactions, and combinations of facial movements.

Compare 6 skills from other repositories ↓
Install

Getting it into your agent

It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.

Clone the repo
git clone --depth 1 https://github.com/OSideMedia/higgsfield-ai-prompt-skill
agentmods
npx agentmods add skills/osidemedia/higgsfield-ai-prompt-skill/higgsfield-facs

Made for: Claude Code.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for higgsfield-facs

README.md
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Your own site
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Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for higgsfield-facs

Your own site · 80×15
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Per session 155 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 7,163 The whole file, excluding the scripts and references it only reads on demand.
Security scan B 1 finding. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector warn 7 Sept 2026
SkillSpector: 1 finding, up to medium

These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →

  • medium Prompt Injection · line 100
    Subtle instructions detected that may alter agent decision-making or introduce hidden biases.
    Fix: Review content for implicit steering or bias. Ensure instructions are explicit and align with the skill's stated purpose.
How audits are shown
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00155 $0.07163
Opus 5 $0.00077 $0.03581
Sonnet 5 $0.00031 $0.01433
Haiku 4.5 $0.00015 $0.00716

Measured 12d ago against content hash a49bf8a6bbe8, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade B, and why

higgsfield-facs scanned grade B with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 12d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Subtle steeringmediumPrompt injection

Instructions that bias recommendations or shape behaviour without the user noticing.

(`../higgsfield-seedance/SKILL.md` § Prompt-Craft Laws). Never tell the user a
skills/higgsfield-facs/SKILL.md · 570 lines

How it starts

The opening of the file, as written. The whole thing — 570 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Higgsfield FACS Director

Direct a face the way an animator does — by muscle, not by mood. FACS (the Facial Action Coding System) names each facial movement as an Action Unit: AU12 is the lip-corner puller (smile), AU6 is the cheek raiser, AU4 is the brow lowerer. Put those codes in a Seedance 2.0 prompt and the model renders the corresponding action. It is the highest-resolution facial control available on the platform, and it is where forced smiles, uncanny faces, mixed emotions, and honest micro-performance in close-up dialogue come from.

This skill is a facial-control layer on top of ../higgsfield-seedance/SKILL.md. Every FACS prompt is still a Seedance prompt — six-slot formula, Prompt-Craft Laws, preflight linter. FACS only changes how you specify the face: AU codes instead of (or alongside) emotion words. It is the muscle-level case of the Voice Rewrite rule "describe physics, not emotion."

QUICK FACTS

Routing aids — read the linked sections for the actual rules.

  • FACS = facial expressions as Action Unit codes (muscle movements), not emotion labels; you write the codes into the prompt
  • Provenance split: the AU vocabulary is standard human science; Seedance's interpretation of codes in a prompt is [EMPIRICAL] — high success rate, not a guarantee
  • Plan first. Decide the 3–4 expressions you need → generate a FACS sheet for only those → write the codes. Generating the full 49-AU sheet and cherry-picking is the anti-pattern
  • 3–4 expressions max per generation. Accuracy drops as you stack more AUs into one clip
  • Two specification styles — codes-only (AU12) vs codes + short anatomical description; test both, neither is universally better
  • The reference sheet is a labelled-grid image (GPT Image 2 / Nano Banana Pro); the LLM can mislabel AUs, so iterate and verify
  • The character photo is optional — codes work without it; attach it only for identity consistency
  • Common emotions decompose to standard AU recipes (Duchenne smile = AU6+AU12; sadness = AU1+AU4+AU15)
  • The payoff is dialogue / monologue: AU-per-beat schedule, combined with the [AUDIO: Xs] lip-sync block; every line gets pre / during / post-line beats
  • [OFFICIAL] Body-level micro-beat recipes beyond the face (throat, breath, skin, posture) + the no-perfect-sync stagger (0.3–0.5s) and listeners-in-bokeh rules

Read the full file on GitHub · 570 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 12d ago First seen · 570 lines · 155 tokens per session scan B a49bf8a6bbe8

Subscribe to this mod's changes

higgsfield-facs is a skill published in the GitHub repository OSideMedia/higgsfield-ai-prompt-skill (531 stars, last pushed 20d ago), licensed MIT. It adds 155 tokens to every session and 7,163 once invoked, about $0.0008 per session on Opus 5. A static security scan graded it B with 1 finding (subtle steering). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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