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Index of all COSS UI particle examples.
Passed 22 of 22 test cases with the skill, and 3 of 22 without it.
and 28 more in the full report
20 fixed3 passed either way0 still failing0 broke
Tokens, turns and time describe resource use, not a dollar price.
One of 19 test cases the skill fixed. Same model, same prompt, with and without the skill.
I am building a responsive web app where profile editing uses a dialog on desktop and a drawer on mobile screens. Find the matching pattern in the COSS particle index and give me the JSON manifest URL.
| Checked | Without skill | With skill |
|---|---|---|
| Provides the URL https://coss.com/ui/r/p-drawer-12.json | Missed | Passed |
The instructions your model reads when the skill loads.
Particles are copy-paste-ready UI patterns built on coss primitives. Browse them visually at https://coss.com/ui/particles.
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
Particle source files live in this repo at apps/ui/registry/default/particles/.
Run the generator script from the coss repo root:
node apps/ui/scripts/generate-particle-index.cjs
Total: 484 particles across 52 component types
test cases passed, vs 3 / 22 without
More skills from the same source and nearby in the registry, with their headline benchmark lift.