Borrowing it
Nothing to install: this file belongs to adrian-d-hidalgo/nestjs-mcp-server. 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/adrian-d-hidalgo/nestjs-mcp-server/main/.claude/agents/developer.mdgit clone --depth 1 https://github.com/adrian-d-hidalgo/nestjs-mcp-serverWrote 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/adrian-d-hidalgo/nestjs-mcp-server/developer)<a href="https://agentmods.dev/agents/adrian-d-hidalgo/nestjs-mcp-server/developer"><img src="https://agentmods.dev/badge/agents/adrian-d-hidalgo/nestjs-mcp-server/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/adrian-d-hidalgo/nestjs-mcp-server/developer"><img src="https://agentmods.dev/badge/agents/adrian-d-hidalgo/nestjs-mcp-server/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 | $0.00384 | $0.03215 |
| Opus 5.5 | $0.00154 | $0.01286 |
| Sonnet 5.5 | $0.00077 | $0.00643 |
| Haiku 4.5 | $0.00038 | $0.00321 |
Grade A, and why
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 2mo 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 — 185 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Never advance past a failing phase. A knip finding is not noise — an export this work
orphaned is dead public surface on a published package.
Typecheck is not verification. CLAUDE.md: "Compiling is not executing; types verify code,
not behavior." A green gate with no test exercising the new behaviour is an untested change, and
you say so rather than implying otherwise.
Coverage thresholds (package.json → jest.coverageThreshold): 80% statements, 55% branches,
70% functions, 85% lines. A change that drops any of them fails the gate.
If the public API changed, the gate is not complete until the affected examples still run:
EXAMPLE=<name> pnpm start:example (tools, guards, prompts, resources, mixed,
for-root-async).
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.
- 2mo ago First seen · 185 lines · 384 tokens per session scan A 0cd89a843590
developer is an agent published in the GitHub repository adrian-d-hidalgo/nestjs-mcp-server (40 stars, last pushed 29d ago), licensed MIT. It adds 384 tokens to every session and 3,215 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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