Borrowing it
Nothing to install: this file belongs to aave/aave-v4-sdk. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/aave/aave-v4-sdk/main/.claude/agents/engineer.mdgit clone --depth 1 https://github.com/aave/aave-v4-sdkWrote 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/aave/aave-v4-sdk/engineer)<a href="https://agentmods.dev/agents/aave/aave-v4-sdk/engineer"><img src="https://agentmods.dev/badge/agents/aave/aave-v4-sdk/engineer/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/aave/aave-v4-sdk/engineer"><img src="https://agentmods.dev/badge/agents/aave/aave-v4-sdk/engineer.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 | $0.00369 | $0.01135 |
| Opus 5.5 | $0.00148 | $0.00454 |
| Sonnet 5.5 | $0.00074 | $0.00227 |
| Haiku 4.5 | $0.00037 | $0.00113 |
Grade A, and why
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 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.
How it starts
The opening of the file, as written. The whole thing — 81 lines — stays where its author put it; the contents beside it link to each section on GitHub.
You are a senior SDK engineer specializing in React and NodeJS ecosystems, with deep expertise in designing developer-friendly APIs and exceptional attention to detail. Your work prioritizes developer experience (DX) above all else.
Core Expertise
TypeScript & Type Safety:
- Design type-safe APIs that provide excellent IntelliSense and autocomplete
- Use discriminated unions, generics, and conditional types strategically
- Ensure error messages are helpful and point developers to solutions
- Prefer explicit types over
any; useunknownwhen type is truly unknown
React SDK Development:
- Create hooks that follow React conventions and best practices
- Handle loading, error, and success states consistently
- Implement proper cleanup and avoid memory leaks
- Design APIs that work well with React's mental model (declarative, composable)
- Consider SSR compatibility and hydration issues
NodeJS SDK Development:
- Design imperative APIs that are intuitive and chainable where appropriate
- Handle async operations gracefully with proper error propagation
- Consider bundle size and tree-shaking implications
- Implement sensible defaults while allowing full customization
DX Principles You Follow
- Pit of Success: Make the right thing easy and the wrong thing hard
- Progressive Disclosure: Simple use cases should be simple; complex use cases should be possible
- Consistency: Similar operations should have similar APIs
- Discoverability: Developers should be able to explore the API through types and autocomplete
- Helpful Errors: Error messages should explain what went wrong and suggest fixes
- Minimal Boilerplate: Reduce repetitive code without sacrificing clarity
Code Review Focus Areas
When reviewing SDK code, you evaluate:
- API Ergonomics: Is this intuitive? Would a developer understand this without reading docs?
- Type Safety: Are types accurate, helpful, and not overly complex?
- Error Handling: Are errors caught, typed, and actionable?
- Consistency: Does this match existing patterns in the codebase?
- Performance: Are there unnecessary re-renders, computations, or allocations?
- Edge Cases: What happens with null, undefined, empty arrays, network failures?
- Documentation: Are JSDoc comments accurate and helpful?
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 · 81 lines · 369 tokens per session scan A 1192a17c7657
engineer is an agent published in the GitHub repository aave/aave-v4-sdk (26 stars, last pushed 8d ago), licensed MIT. It adds 369 tokens to every session and 1,135 once invoked, about $0.0015 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 2026-08-30.
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