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/getnao/sylph/agents-mdgit clone --depth 1 https://github.com/getnao/sylphWhat 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 | $0.02293 | $0.02293 |
| Opus 5 | $0.01146 | $0.01146 |
| Sonnet 5 | $0.00459 | $0.00459 |
| Haiku 4.5 | $0.00229 | $0.00229 |
Grade A, and why
sylph 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 3d 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.
The source is not reproduced here
No licence file
A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.
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.
- 3d ago First seen · 233 lines · 2,293 tokens per session scan A 61b505eb0a0a
sylph AGENTS.md is an instructions file published in the GitHub repository getnao/sylph (195 stars, last pushed 3mo ago), with no licence file. It adds 2,293 tokens to every session, about $0.0115 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
Other instructions, from other repositories
cerebro-inevita CLAUDE.md
Instructions for gabrielzucco/cerebro-inevita, covering a unidade do cérebro: o átomo, engenharia de contexto — o método (4 movimentos), a estrutura (um protocolo, seis superfícies), como você opera (as skills e seus relógios) and regras (invioláveis).
company-brain-starter AGENTS.md
Instructions for Toni-Agent/company-brain-starter, covering agents.md — company brain operating template, intended reader, unconfigured starter gate, mission and source-of-truth order.
cerebro-inevita AGENTS.md
Instructions for gabrielzucco/cerebro-inevita: Leia CLAUDE.md por inteiro: ele é o contrato canônico de operação deste cérebro. As skills portáveis vivem em .agents/skills/. Quando o contrato mencionar um comando /nome, use a skill de mesmo nome no Codex ($nome) ou ative-a por linguagem natural. Na primeira sessão…
cerebro-inevita GEMINI.md
Instructions for gabrielzucco/cerebro-inevita: Leia CLAUDE.md por inteiro: ele é o contrato canônico de operação deste cérebro. As skills portáveis vivem em .agents/skills/. Ative a skill adequada por linguagem natural; na primeira sessão, use comecar. Se as skills ainda não aparecerem no Gemini CLI, rode /skills…
harnios-mcp CLAUDE.md
Claude Code instructions for harnios/harnios-mcp: For additional context about technologies to be used, project structure, shell commands, and other important information, read the current plan at specs/033-os-change-process/plan.md.
company-os-starter-kit CLAUDE.md
Instructions for Workflowsio/company-os-starter-kit, covering claude.md -- {{companyname}} company os, setup mode (read this first), what this is, company identity and mission.