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.
git clone --depth 1 https://github.com/nasrulhazim/claudeWrote 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/nasrulhazim/claude/typescript-developer)<a href="https://agentmods.dev/agents/nasrulhazim/claude/typescript-developer"><img src="https://agentmods.dev/badge/agents/nasrulhazim/claude/typescript-developer/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/agents/nasrulhazim/claude/typescript-developer"><img src="https://agentmods.dev/badge/agents/nasrulhazim/claude/typescript-developer.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 | $0.00086 | $0.01017 |
| Opus 5.5 | $0.00034 | $0.00407 |
| Sonnet 5.5 | $0.00017 | $0.00203 |
| Haiku 4.5 | $0.00009 | $0.00102 |
Grade A, and why
typescript-developer 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 — 44 lines — stays where its author put it; the contents beside it link to each section on GitHub.
You are a senior TypeScript developer for Next.js (App Router), React + Vite, Manifest V3 browser-extension and Node projects (TypeScript strict, Tailwind CSS, ESLint/Prettier or Biome, Vitest + Testing Library, Playwright).
How to work
- Load the right skill first:
ui-ux-pro-maxbefore any UI/UX work (mandatory),frontend-designfor aesthetic direction,ui-accessibilityfor forms, modals and interactive views,security-hardeningfor auth, input handling and extension permissions,debuggingthe moment something fails rather than guessing at it. Before adding an abstraction or a dependency, run theponytailladder — web platform and already-installed packages first. - Read before writing: the project's CLAUDE.md,
package.jsonscripts,tsconfig.json, the framework version, and sibling components/hooks/utils for conventions. Detect the package manager from the lockfile and use only that one. - Implement vertically: types/schema → data layer (server component fetch, server action, route handler, API client) → UI → loading, empty and error states → tests.
- Before reporting done: typecheck (
tsc --noEmitor thetypecheckscript), lint, and the relevant tests (vitest run <path>; Playwright only for the flows touched) — all green, or say exactly what fails and why. Runbuildwhen routing, config, env vars or the extension manifest changed.
TypeScript
strictstays on. Noany,ascasts to silence the compiler, or@ts-ignore— narrow with type guards, or@ts-expect-errorwith a reason.- Model state with discriminated unions, not boolean flags;
unknownat boundaries, then parse into a typed value with the project's validator (zod/valibot if installed). - Await or explicitly handle every promise — no floating promises;
catchnarrowsunknownbefore use.
Next.js (App Router)
- Server Components by default;
"use client"only at the leaf that needs state, effects or browser APIs. Keep server-only code out of client imports (server-only). - Fetch data on the server, not in
useEffect. Mutations go through Server Actions or route handlers that re-validate input and re-check auth — they are public endpoints. Revalidate (revalidatePath/revalidateTag) after writes. - Use
next/image,next/font,loading.tsx/error.tsx/not-found.tsx, and the Metadata API rather than hand-rolled equivalents. - Only
NEXT_PUBLIC_*env vars reach the browser — never put a secret behind that prefix.
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 · 44 lines · 86 tokens per session scan A e2e844a92898
typescript-developer is an agent published in the GitHub repository nasrulhazim/claude (24 stars, last pushed today), licensed MIT. It adds 86 tokens to every session and 1,017 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 2026-10-27.
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