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.
git clone --depth 1 https://github.com/fanfan-de/anyboxnpx agentmods add skills/fanfan-de/anybox/sprite-pipelineWrote 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.
[](https://agentmods.dev/skills/fanfan-de/anybox/sprite-pipeline)<a href="https://agentmods.dev/skills/fanfan-de/anybox/sprite-pipeline"><img src="https://agentmods.dev/badge/skills/fanfan-de/anybox/sprite-pipeline/github.svg" alt="Measured on agentmods" height="20"></a>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.
<a href="https://agentmods.dev/skills/fanfan-de/anybox/sprite-pipeline"><img src="https://agentmods.dev/badge/skills/fanfan-de/anybox/sprite-pipeline.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00041 | $0.00748 |
| Opus 5 | $0.00020 | $0.00374 |
| Sonnet 5 | $0.00008 | $0.00150 |
| Haiku 4.5 | $0.00004 | $0.00075 |
Grade A, and why
sprite-pipeline scanned grade A with 0 findings 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 9d 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.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 103 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Sprite Pipeline
Overview
Use this skill for 2D sprite generation and normalization. This workflow is intentionally anchored around one approved frame and a whole-strip generation pass because frame-by-frame generation drifts too easily.
This skill is 2D-specific. If the request is for 3D characters, meshes, or materials, route back through ../game-studio/SKILL.md.
Core Workflow
- Start from an approved in-game seed frame.
- The seed frame should already reflect the right silhouette, palette, costume, and proportions.
- Build a larger transparent reference canvas around that frame.
- Use
../../scripts/build_sprite_edit_canvas.py.
- Use
- Ask for the full animation strip in one edit request.
- Do not generate each frame independently unless the user explicitly accepts lower consistency.
- Normalize the result into fixed-size game frames.
- Use
../../scripts/normalize_sprite_strip.py. - Use one shared scale across the whole strip.
- Align frames with one shared anchor, typically bottom-center.
- Use
- Optionally lock frame 01 back to the shipped seed frame.
- Do this when the animation should begin from the exact idle or base pose already in game.
- Render a preview sheet and inspect the animation in-engine before approving it.
- Use
../../scripts/render_sprite_preview_sheet.py.
- Use
Prompting Rules
Always preserve these invariants in the prompt:
- same character
- same facing direction
- same palette family
- same silhouette family
- same readable face or key features
- same outfit proportions
- transparent background
- exact frame count and slot layout
Always ask for:
- one strip at once
- a transparent canvas
- no scenery, labels, or poster composition
- crisp pixel-art clusters for pixel work
- production asset tone, not concept art
Using Image Generation
For live asset generation or edits, use the installed imagegen skill in this workspace. This skill defines the game-specific process; imagegen handles the API-backed generation or edit execution.
What ships with it
1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 9d ago First seen · 103 lines · 41 tokens per session scan A eaaca5ef3fae
sprite-pipeline is a skill published in the GitHub repository fanfan-de/anybox (57 stars, last pushed 1mo ago), licensed MIT. It adds 41 tokens to every session and 748 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.
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