Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add skills/fusengine/codex/astro-assetsnpx skills add fusengine/codex --skill astro-assetsgit clone --depth 1 https://github.com/fusengine/codexWhat 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 | $0.00030 | $0.00957 |
| Opus 5 | $0.00015 | $0.00478 |
| Sonnet 5 | $0.00006 | $0.00191 |
| Haiku 4.5 | $0.00003 | $0.00096 |
Grade A, and why
astro-assets 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 yesterday.
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.
The source is not reproduced here
No licence file
A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.
What ships with it
8 files 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.
- yesterday First seen · 98 lines · 30 tokens per session scan A 4120d7ad96a1
astro-assets is a skill published in the GitHub repository fusengine/codex (1 stars, last pushed 14d ago), with no licence file. It adds 30 tokens to every session and 957 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 2026-08-31.
Other skills, from other repositories
sprite-atlas-builder
Sprite atlas pipeline. Use for sprites, tilesets, textures, asset sheets, extraction, curation, and QA.
art-drama-music-professor-postsecondary
Use when a task needs the judgment of a Postsecondary Art, Drama, or Music Professor — diagnosing a jury/crit score that contradicts a semester of formative work, building a studio-art or performance tenure dossier around exhibitions and productions instead of publications, staffing applied one-on-one lessons or crit…
animator
Use when a task needs the judgment of a Character/Motion Animator — triaging which shots in a batch get full 12-principles polish versus blocking-only under a tight schedule, choosing pose-to-pose vs. straight-ahead for a shot, writing a rig-limitation workaround memo, or reading a director's revision note as a pose…
art-director
Use when a task needs the judgment of an Art Director — commissioning and choosing between divergent creative concepts for a campaign, triaging client feedback into concept vs. execution notes, pressure-testing a concept against a production budget/timeline before it's locked in, or managing a shoot/production budget…
codex-studio-setup
Set up a local Codex Studio checkout end to end from the welcome-screen handoff prompt.
imagegen
Generate or edit raster images when the task benefits from AI-created bitmap visuals such as photos, illustrations, textures, sprites, mockups, or transparent-background cutouts. Use when Codex should create a brand-new image, transform an existing image, or derive visual variants from references, and the output…