Petdex is a gallery, installer, and desktop application for animated pets that accompany coding agents. People browse and submit pets through its website, install them with a command-line tool, and use the desktop app to display reactions to agent activity. The catalogue includes skills and instructions for creating or using these pets with supported coding agents.
Borrowing it
Nothing to install: this file belongs to crafter-station/petdex. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/crafter-station/petdex/main/.agents/skills/coss-particles/SKILL.mdgit clone --depth 1 https://github.com/crafter-station/petdexWrote 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/crafter-station/petdex/coss-particles)<a href="https://agentmods.dev/skills/crafter-station/petdex/coss-particles"><img src="https://agentmods.dev/badge/skills/crafter-station/petdex/coss-particles/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/crafter-station/petdex/coss-particles"><img src="https://agentmods.dev/badge/skills/crafter-station/petdex/coss-particles.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 | $0.00046 | $0.12105 |
| Opus 5.5 | $0.00018 | $0.04842 |
| Sonnet 5.5 | $0.00009 | $0.02421 |
| Haiku 4.5 | $0.00005 | $0.01210 |
Grade A, and why
coss-particles 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 1mo 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.
Copies of this mod
1 near-identical copy found in the catalogue:
- coss-particles — 100% identical, 0 lines differ
How it starts
The opening of the file, as written. The whole thing — 738 lines — stays where its author put it; the contents beside it link to each section on GitHub.
COSS UI Particles Index
Particles are copy-paste-ready UI patterns built on coss primitives. Browse them visually at https://coss.com/ui/particles.
How to use this skill
- Describe the UI you need (e.g. "a form with validation", "a dialog with a form inside", "tabs with icons").
- Search this index for matching particles by component type and description.
- Fetch the JSON URL to get the full source code of the particle.
- Adapt the particle code to your needs.
JSON URL pattern
Each particle has a JSON manifest at:
https://coss.com/ui/r/<particle-name>.json
For example: https://coss.com/ui/r/p-accordion-1.json
Source code
Particle source files live in this repo at apps/ui/registry/default/particles/.
Updating this index
Run the generator script from the coss repo root:
node apps/ui/scripts/generate-particle-index.cjs
Total: 484 particles across 52 component types
Component types
- accordion (4)
- alert (7)
- alert-dialog (2)
- autocomplete (15)
- avatar (14)
- badge (20)
- breadcrumb (7)
- button (40)
- calendar (24)
- card (11)
- checkbox (5)
- checkbox-group (5)
- collapsible (1)
- combobox (18)
- command (2)
- date-picker (9)
- dialog (6)
- drawer (14)
- empty (1)
- field (18)
- fieldset (1)
- form (2)
- frame (4)
- group (22)
- input (19)
- input-group (28)
- kbd (1)
- menu (9)
- meter (4)
- number-field (11)
- otp-field (9)
- pagination (3)
- popover (3)
- preview-card (1)
- progress (3)
- radio-group (6)
- scroll-area (5)
- select (23)
- separator (1)
- sheet (3)
- skeleton (2)
- slider (23)
- spinner (1)
- switch (6)
- table (8)
- tabs (13)
- textarea (15)
- toast (13)
- toggle (8)
- toggle-group (9)
- toolbar (1)
- tooltip (4)
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.
- 1mo ago First seen · 738 lines · 46 tokens per session scan A 742bad15e56a
coss-particles is a skill published in the GitHub repository crafter-station/petdex (4,283 stars, last pushed 15d ago), licensed MIT. It adds 46 tokens to every session and 12,105 once invoked, about $0.0002 per session on Opus 5.5. 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 2026-08-30.
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