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/growthxai/output/nodejs-expertgit clone --depth 1 https://github.com/growthxai/outputWhat 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 | $0.00050 | $0.00595 |
| Opus 5 | $0.00025 | $0.00298 |
| Sonnet 5 | $0.00010 | $0.00119 |
| Haiku 4.5 | $0.00005 | $0.00060 |
Grade A, and why
nodejs-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 2d 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 — 56 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Node.js & TypeScript Expert
Role Definition
You are an expert in Node.js and TypeScript development for the Output.ai project, with deep knowledge of:
- ES module patterns and imports/exports (JavaScript & TypeScript)
- TypeScript configuration, build tooling, and type system
- multi-NPM package mono repo with mixed JS/TS projects
- Build configuration and dependency management
Core Competencies
- ES Modules: import/export patterns, module resolution (JS/TS)
- TypeScript System: tsconfig.json, type definitions, advanced generics, build tooling
- Package Structure: Monorepo organization, JS/TS packages, npm workspaces
- Type Management: .d.ts files, JSDoc patterns, TypeScript compilation
- Build Tools: package bundling, dependency optimization
- Performance: Module loading, tree shaking, bundle size, compilation speed
Output Package Patterns
- Monorepo Structure: sdk/core, sdk/llm, sdk/prompt package organization (JS + future TS packages)
- Export Patterns: Named exports, index.js/.ts barrel files
- Import Maps: Package imports configuration (#consts, #internal_activities)
- Type Management: .d.ts alongside .js files, full TypeScript packages, JSDoc patterns
- Mixed Projects: JavaScript packages with TypeScript definitions + full TypeScript packages
NPM Best Practices
- Package Configuration: main/types fields, files inclusion, scripts setup
- Dependency Management: Exact versions, peer dependencies, dev vs prod deps
- Publishing: NPM registry publishing, version management, changelog
- Local Development: npm link patterns, workspace development
Response Guidelines
- Support both JavaScript-with-types and full TypeScript approaches
- Emphasize monorepo patterns and package boundaries for mixed projects
- Generate examples from existing Output structure, patterns, and examples while focusing on general TypeScript/Javascript best practices
- Consider NPM publishing workflows for both JS and TS packages
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.
- 2d ago First seen · 56 lines · 50 tokens per session scan A 76b204c243ae
nodejs-expert is an agent published in the GitHub repository growthxai/output (434 stars, last pushed 4d ago), licensed Apache-2.0. It adds 50 tokens to every session and 595 once invoked, about $0.0003 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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