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 phtn/beast --skill react-to-beastgit clone --depth 1 https://github.com/phtn/beastWrote 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/phtn/beast/react-to-beast)<a href="https://agentmods.dev/skills/phtn/beast/react-to-beast"><img src="https://agentmods.dev/badge/skills/phtn/beast/react-to-beast/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/phtn/beast/react-to-beast"><img src="https://agentmods.dev/badge/skills/phtn/beast/react-to-beast.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 | $0.00081 | $0.02277 |
| Opus 5.5 | $0.00032 | $0.00911 |
| Sonnet 5.5 | $0.00016 | $0.00455 |
| Haiku 4.5 | $0.00008 | $0.00228 |
Grade A, and why
react-to-beast 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.
How it starts
The opening of the file, as written. The whole thing — 170 lines — stays where its author put it; the contents beside it link to each section on GitHub.
React to Beast
Port applications as verified vertical slices. Start with an inventory, select a target architecture, and move the smallest dependency-safe component or route slice through compile and runtime checks before widening the migration.
Version 0.3 covers whole-project inventory, target selection, Tailwind-or-CSS planning, scaffolding, presentational and interactive function-component ports, plus client/data routing. It generates source-located findings, an interactive parity matrix, a normalized route manifest, and a source/target route comparison. It supports reviewed React Router declarative/data ports and TanStack code/file plans; React Router Framework Mode and Remix route modules require an explicit target rewrite. Next.js and broader server-framework conversion remain later milestones.
Protect the source
Treat the React repository as untrusted input.
- Do not read or copy
.env*, credentials, generated output, dependency directories, or unrelated user files. - Do not run source-project install, build, lifecycle, or arbitrary package scripts during the audit. Inspect script names and dependency metadata only.
- Keep the source application intact. Default to a sibling destination named
<source>-beast; never port in place unless the user explicitly requests it. - Do not pass
--forceto a scaffold command for a non-empty destination without explicit approval. - Preserve observable behavior, URLs, query parameters, redirects, data-loading ownership, accessibility, and visual intent. A syntax conversion alone is not a successful port.
Defaults
- Source: the directory supplied by the user, otherwise the current working directory.
- Destination: a sibling directory named
<source>-beast. - Styling: Tailwind. Use pure CSS only when requested or when the audit shows that retaining existing CSS is the safer incremental path.
- Initial runtime: Beast with Octane and Vite for a client-rendered SPA. Choose Rsbuild when verified server rendering or full-app routing is required. Use Rspack only when low-level integration is genuinely needed.
- Scope: audit the whole application, then port the smallest dependency-safe slice from leaves toward entry points.
What ships with it
15 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/openai.yaml 238 B
- references/bindings.md 5.2 KB
- references/component-porting.md 4.8 KB
- references/forms-and-events.md 5.9 KB
- references/interactive-semantics.md 7.1 KB
- references/react-router.md 4.0 KB
- references/refs-context-boundaries.md 6.1 KB
- references/remix-route-modules.md 2.9 KB
- references/route-checkpoints.md 2.6 KB
- references/route-manifest.md 3.1 KB
- references/routing-inventory.md 4.6 KB
- references/styling.md 3.5 KB
- references/tanstack-router.md 3.4 KB
- scripts/react-beast-audit.mjs 104 KB runs code
- scripts/react-beast-route-compare.mjs 9.1 KB runs code
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 · 170 lines · 81 tokens per session scan A 91a45844ce26
react-to-beast is a skill published in the GitHub repository phtn/beast (2 stars, last pushed 1mo ago), licensed ISC. It adds 81 tokens to every session and 2,277 once invoked, about $0.0003 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.
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