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/basehub-ai/forums/vercel-react-best-practicesnpx skills add basehub-ai/forums --skill vercel-react-best-practicesgit clone --depth 1 https://github.com/basehub-ai/forumsWhat 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 | $0.00067 | $0.01277 |
| Opus 5 | $0.00034 | $0.00639 |
| Sonnet 5 | $0.00013 | $0.00255 |
| Haiku 4.5 | $0.00007 | $0.00128 |
Grade A, and why
vercel-react-best-practices 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 3d 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
Licensed GPL-3.0
The repository is licensed GPL-3.0, which this catalogue does not treat as permission to reproduce the file. Read it at the source.
What ships with it
50 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 59 KB
- metadata.json 921 B
- README.md 3.3 KB
- rules/_sections.md 1.5 KB
- rules/_template.md 631 B
- rules/advanced-event-handler-refs.md 1.4 KB
- rules/advanced-use-latest.md 1.2 KB
- rules/async-api-routes.md 1.1 KB
- rules/async-defer-await.md 2.0 KB
- rules/async-dependencies.md 942 B
- rules/async-parallel.md 654 B
- rules/async-suspense-boundaries.md 2.5 KB
- rules/bundle-barrel-imports.md 2.3 KB
- rules/bundle-conditional.md 866 B
- rules/bundle-defer-third-party.md 920 B
- rules/bundle-dynamic-imports.md 791 B
- rules/bundle-preload.md 1.1 KB
- rules/client-event-listeners.md 1.9 KB
- rules/client-swr-dedup.md 1.1 KB
- rules/js-batch-dom-css.md 1.9 KB
- rules/js-cache-function-results.md 1.9 KB
- rules/js-cache-property-access.md 532 B
- rules/js-cache-storage.md 1.6 KB
- rules/js-combine-iterations.md 753 B
- rules/js-early-exit.md 1.1 KB
- rules/js-hoist-regexp.md 1.0 KB
- rules/js-index-maps.md 837 B
- rules/js-length-check-first.md 1.7 KB
- rules/js-min-max-loop.md 2.1 KB
- rules/js-set-map-lookups.md 532 B
- rules/js-tosorted-immutable.md 1.7 KB
- rules/rendering-activity.md 564 B
- rules/rendering-animate-svg-wrapper.md 1.2 KB
- rules/rendering-conditional-render.md 980 B
- rules/rendering-content-visibility.md 815 B
- rules/rendering-hoist-jsx.md 1.0 KB
- rules/rendering-hydration-no-flicker.md 2.3 KB
- rules/rendering-svg-precision.md 588 B
- rules/rerender-defer-reads.md 973 B
- rules/rerender-dependencies.md 824 B
- rules/rerender-derived-state.md 724 B
- rules/rerender-functional-setstate.md 2.9 KB
- rules/rerender-lazy-state-init.md 2.0 KB
- rules/rerender-memo.md 1.1 KB
- rules/rerender-transitions.md 1.0 KB
- rules/server-after-nonblocking.md 2.0 KB
- rules/server-cache-lru.md 1.3 KB
- rules/server-cache-react.md 681 B
- rules/server-parallel-fetching.md 1.5 KB
- rules/server-serialization.md 996 B
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.
- 3d ago First seen · 122 lines · 67 tokens per session scan A 6378620591a6
vercel-react-best-practices is a skill published in the GitHub repository basehub-ai/forums (43 stars, last pushed 20d ago), licensed GPL-3.0. It adds 67 tokens to every session and 1,277 once invoked, about $0.0003 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 2026-08-30.
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