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 instructions/jnpiyush/agentx/reactgit clone --depth 1 https://github.com/jnPiyush/AgentXWhat 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 | $0.00440 | $0.00440 |
| Opus 5 | $0.00220 | $0.00220 |
| Sonnet 5 | $0.00088 | $0.00088 |
| Haiku 4.5 | $0.00044 | $0.00044 |
Grade A, and why
AgentX react.instructions.md 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 yesterday.
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.
What it actually says
React / TypeScript Instructions
Auto-loads when editing React files. For comprehensive standards, load the skill.
Skill: .github/skills/languages/react/SKILL.md
Key Rules
- Functional components only, with TypeScript interfaces for props
- Destructure props in function signature
- Custom hooks: extract reusable logic, prefix with
use - useCallback for callbacks passed to children
- useMemo for expensive computations
- React.memo for pure components
- React Query / TanStack Query for server state
- Zustand or Jotai for client state (avoid prop drilling)
- React Testing Library -- test behavior, not implementation
- MSW for API mocking in tests
- Always include alt text, use semantic HTML, ensure keyboard navigation
Critical Rules (Embedded -- Always Active)
Testing
- 80%+ code coverage required
- React Testing Library: query by role/label, NEVER by test-id unless no alternative
- Test user behavior (clicks, types, submits) not implementation details
- Use
screen.getByRole(),userEvent.click(),waitFor()for async - MSW for API mocking -- intercept at network level, not in component
Accessibility
- All images MUST have descriptive
alttext - All interactive elements MUST be keyboard-accessible
- Use semantic HTML (
<button>,<nav>,<main>,<article>) - Color contrast MUST meet WCAG 2.1 AA (4.5:1 for text)
- Test with
axe-coreorjest-axein automated tests
Security
- Sanitize any user-generated HTML (use
DOMPurify) - Never use
dangerouslySetInnerHTMLwithout sanitization - Validate all form inputs with
zodschemas at the boundary - Never store secrets or tokens in client-side 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.
- yesterday First seen · 48 lines · 440 tokens per session scan A 015f345b539d
AgentX react.instructions.md is an instructions file published in the GitHub repository jnPiyush/AgentX (15 stars, last pushed 5d ago), licensed Apache-2.0. It adds 440 tokens to every session, about $0.0022 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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