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 instructions/plugin-federation/units-static/agents-mdgit clone --depth 1 https://github.com/plugin-federation/units-staticWhat 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 | $0.00298 | $0.00298 |
| Opus 5 | $0.00149 | $0.00149 |
| Sonnet 5 | $0.00060 | $0.00060 |
| Haiku 4.5 | $0.00030 | $0.00030 |
Grade A, and why
units-static AGENTS.md 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 yesterday.
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.
What it actually says
units-static — Agent Guide
Purpose
High-quality static unit conversion MCP server used as the “good MCP” dogfood for Plugin Federation (judges should score high; CI fails on judge fail and eval misses).
Tools
| Tool | Description |
|---|---|
list_units |
Catalog of unit ids by dimension |
convert_length |
Length conversion |
convert_mass |
Mass conversion |
convert_temperature |
Temperature conversion |
convert_volume |
Volume conversion |
compare_quantities |
Same-dimension comparison |
Running
pip install -r requirements.txt
python src/server.py
Conventions
- Prefer deep tool/parameter descriptions over short stubs.
- Keep enums closed; never invent unit strings outside
list_units. - Keep output models object-shaped for MCP
outputSchema. - Do not add network-backed tools; this server is deterministic.
GitHub Actions
mcp-tools-list-validate— structural tools/list checksnexus-oidc-exchange+mcp-tool-judge-pipeline— catalog, schema verify, selection-surface embeddings (text-embedding-3-small), judges. Nexus owns similarity reports; embed errors do not fail judges.anthropic-mcp-eval—evals/evaluations.xmlat 100% accuracy threshold
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.
- yesterday First seen · 41 lines · 298 tokens per session scan A be395b8d6abd
units-static AGENTS.md is an instructions file published in the GitHub repository plugin-federation/units-static (0 stars, last pushed 15d ago), licensed MIT. It adds 298 tokens to every session, about $0.0015 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 2026-08-31.
Other instructions, from other repositories
codex AGENTS.md
AGENTS.md instructions for openai/codex, covering rust/codex-rs, the codex-core crate, code review rules, crate api surface and model visible context.
buildNext
Working notes and architecture documentation for the new esbuild-based build system in build/next. Use when making changes to the new build pipeline (transpile/bundle commands, NLS plugin, source-map handling, resource copying, or self-hosting watch tasks).
next.js AGENTS.md
Instructions for vercel/next.js, covering next.js development guide, codebase structure, monorepo overview, core package: packages/next and other important packages.
vscode oss-third-party-notices.instructions.md
Instructions for microsoft/vscode, covering vs code oss third-party-notices pipeline, architecture, pipeline flow in ci, applying the notice (cutover) and fallback chain (never fail the build).
spec-kit AGENTS.md
Instructions for github/spec-kit, covering agents.md, about spec kit and specify, quickstart — add a new integration in 5 steps, integration architecture and integrationmanifest — file tracking.
langchain AGENTS.md
Instructions for langchain-ai/langchain, covering global development guidelines for the langchain monorepo, corridor security analysis, project architecture and context, monorepo structure and development tools & commands.