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 skills add nikolailehbrink/llm-stack --skill vercel-composition-patternsgit clone --depth 1 https://github.com/nikolailehbrink/llm-stackWrote 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/nikolailehbrink/llm-stack/vercel-composition-patterns)<a href="https://agentmods.dev/skills/nikolailehbrink/llm-stack/vercel-composition-patterns"><img src="https://agentmods.dev/badge/skills/nikolailehbrink/llm-stack/vercel-composition-patterns/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/nikolailehbrink/llm-stack/vercel-composition-patterns"><img src="https://agentmods.dev/badge/skills/nikolailehbrink/llm-stack/vercel-composition-patterns.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00058 | $0.00618 |
| Opus 5.5 | $0.00023 | $0.00247 |
| Sonnet 5.5 | $0.00012 | $0.00124 |
| Haiku 4.5 | $0.00006 | $0.00062 |
Grade A, and why
vercel-composition-patterns 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 2mo 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.
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
9 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.
- AGENTS.md 22 KB
- rules/architecture-avoid-boolean-props.md 2.2 KB
- rules/architecture-compound-components.md 2.5 KB
- rules/patterns-children-over-render-props.md 1.8 KB
- rules/patterns-explicit-variants.md 2.3 KB
- rules/react19-no-forwardref.md 958 B
- rules/state-context-interface.md 4.9 KB
- rules/state-decouple-implementation.md 2.6 KB
- rules/state-lift-state.md 3.2 KB
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.
- 2mo ago First seen · 85 lines · 58 tokens per session scan A fdd2528bd8b5
vercel-composition-patterns is a skill published in the GitHub repository nikolailehbrink/llm-stack (5 stars, last pushed 3mo ago), with no licence file. It adds 58 tokens to every session and 618 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 2026-08-31.
vercel-composition-patterns compared with skills from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| vercel-composition-patternsnikolailehbrink/llm-stack | Skill | 5 | 3mo ago | none | A | 58 | Claude Code, Codex |
| frontend-patternsaffaan-m/ECC | Skill | 298k | 4d ago | MIT | A | 41 | Claude Code, Codex |
| react-patternsaffaan-m/ECC | Skill | 298k | 4d ago | MIT | A | 49 | Claude Code, Kiro |
| react-testingaffaan-m/ECC | Skill | 298k | 4d ago | MIT | A | 59 | Claude Code, Kiro |
| reskinCopilotKit/CopilotKit | Skill | 39k | yesterday | MIT | A | 154 | Claude Code |
| copilotkit-channelsCopilotKit/CopilotKit | Skill | 39k | yesterday | MIT | A | 112 | Claude Code |
| setup-slack-channelCopilotKit/CopilotKit | Skill | 39k | yesterday | MIT | A | 206 | Claude Code |