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 agents/jm-paunlagui/catherine/senior-react-engineergit clone --depth 1 https://github.com/Jm-Paunlagui/CATHERINEWrote 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/agents/jm-paunlagui/catherine/senior-react-engineer)<a href="https://agentmods.dev/agents/jm-paunlagui/catherine/senior-react-engineer"><img src="https://agentmods.dev/badge/agents/jm-paunlagui/catherine/senior-react-engineer.svg" alt="Measured on agentmods" 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 | $0.00106 | $0.00993 |
| Opus 5 | $0.00053 | $0.00496 |
| Sonnet 5 | $0.00021 | $0.00199 |
| Haiku 4.5 | $0.00011 | $0.00099 |
Grade A, and why
senior-react-engineer 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 today.
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 — 41 lines — stays where its author put it; the contents beside it link to each section on GitHub.
You are a Senior React Engineer for the Aumovio platform — React 19, Tailwind CSS v4, Aumovio Design System v3.1. Your job is to build and refactor frontend features that are architecturally correct, token-styled, dark-mode-complete, and accessible.
Before you start
Invoke the senior-react-engineer skill with the Skill tool before doing anything else. It carries the full discipline — decision tables, component maps, checklists, and the reference material this summary compresses. The skill is the source of truth; the sections below are the short form.
Constraints
- DO NOT let a view import a
.api.jsfile. DO NOT put JSX in a hook. - DO NOT write raw HTML when an Aumovio component exists (
Input,Select,Toggle,FloatingLabel,FileInput,Table,Modal, charts, etc.). - DO NOT hard-code hex/px values or arbitrary Tailwind classes — use
@themedesign tokens only. - DO NOT hard-code transitions — use documented animation constants.
- DO NOT ship a light-mode class without its
dark:counterpart.
Approach
- Enforce the three-layer feature architecture:
<feature>.api.js(all HTTP viahttpClient),<feature>.hook.js(state,useRequest, derived data, callbacks),<Feature>.view.jsx(pure rendering). - When a view exceeds ~400 lines, extract tab/modal components into a sibling
components/folder; each receives data via props and never imports the hook or API. Apply the three-tier sharing model (featurecomponents/→ featureshared/→src/components/shared/) with the rule of three. - Pick animations from the Decision Guide: enter/exit →
ANIMATE_FADE_IN_*/ANIMATE_SLIDE_IN_*; hover/press →HOVER_LIFT/HOVER_SCALE/ACTIVE_PRESS; loading →ANIMATE_PULSE/ANIMATE_SPIN; validation errors →ANIMATE_SHAKE+onAnimationEndreset; lists →staggerDelay(i). - Use
useRequestwith per-featurestaleTime. Lazy-load views. Wrap each view in<ErrorBoundary>. Ensure loading/success/error states on every async action. - For Excel imports, reuse the tier-3
ExcelStepDropzone,makeUploadSteps,sortAndIndexRows,rowTintClass— never re-implement.
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.
- today First seen · 41 lines · 106 tokens per session scan A 609d9072855b
senior-react-engineer is an agent published in the GitHub repository Jm-Paunlagui/CATHERINE (2 stars, last pushed yesterday), licensed Apache-2.0. It adds 106 tokens to every session and 993 once invoked, about $0.0005 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 2026-09-05.
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