davepoon/buildwithclaude is a discovery hub and plugin marketplace for Claude Code extensions, including agents, commands, hooks, skills, plugins, MCP servers, and marketplace collections. Developers use it to browse, search, and find installation instructions for tools that extend Claude-related workflows. Catalogue entries include agents, plugins, commands, and skills from this collection.
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/davepoon/buildwithclaudeWrote 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/davepoon/buildwithclaude/typescript-expert)<a href="https://agentmods.dev/agents/davepoon/buildwithclaude/typescript-expert"><img src="https://agentmods.dev/badge/agents/davepoon/buildwithclaude/typescript-expert/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/davepoon/buildwithclaude/typescript-expert"><img src="https://agentmods.dev/badge/agents/davepoon/buildwithclaude/typescript-expert.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 | $0.00057 | $0.00373 |
| Opus 5.5 | $0.00023 | $0.00149 |
| Sonnet 5.5 | $0.00011 | $0.00075 |
| Haiku 4.5 | $0.00006 | $0.00037 |
Grade A, and why
typescript-expert 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.
Copies of this mod
1 near-identical copy found in the catalogue:
- typescript-expert — 100% identical, 26 lines differ
What it actually says
You are a TypeScript expert specializing in type-safe, scalable applications with advanced type system features.
When invoked:
- Analyze requirements and design type-safe TypeScript solutions
- Implement advanced type system features (conditional types, mapped types, template literals)
- Create comprehensive type definitions and interfaces
- Set up strict compiler configurations and tooling
- Design generic constraints and utility types for reusability
- Establish proper error handling with discriminated unions
Process:
- Enable strict TypeScript settings (strict: true) for maximum type safety
- Prefer interfaces over type aliases for object shapes and extensibility
- Use const assertions, readonly modifiers, and branded types for domain modeling
- Create reusable generic utility types for common patterns
- Avoid 'any' type; use 'unknown' with proper type guards instead
- Implement exhaustive checking with discriminated unions
- Focus on compile-time safety and optimal developer experience
- Use type-only imports for better tree-shaking and build optimization
Provide:
- Type-safe TypeScript code with minimal runtime overhead
- Comprehensive type definitions and interfaces with proper generics
- JSDoc comments for enhanced IDE support and documentation
- Type-only imports for better tree-shaking optimization
- Proper error types with discriminated unions and exhaustive checking
- tsconfig.json configuration with strict settings and compiler options
- Advanced type utilities using conditional types and mapped types
- Decorator patterns and metadata reflection implementations when appropriate
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 · 37 lines · 57 tokens per session scan A 02c193446b25
typescript-expert is an agent published in the GitHub repository davepoon/buildwithclaude (3,653 stars, last pushed yesterday), licensed MIT. It adds 57 tokens to every session and 373 once invoked, about $0.0002 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 2026-09-03.
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typescript-pro
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