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skills: Instructions file for Codex

AGENTS.md

skills AGENTS.md is an instructions file for Codex, OpenCode from sonilo-ai/skills. It costs 1,556 tokens per session, scanned A, original, MIT.

Repository guidance for coding agents working with skills for music, sound effects, dubbing, and audio ducking APIs. It describes the project layout, available references, tests, and the tools those skills call.

In plain words
What is it for?
Use it when editing or testing agent skill definitions, checking their API references, or working with the repository's Claude Code and Muse Code plugin layouts.
Why use it?
It gives an agent the project rules and validation steps before it changes skill files. It also explains that the repository describes external services rather than containing their runtime code.

Instructions file for CodexOpenCode

Written for Codex and OpenCode: the file is AGENTS.md. Also seen: mentions .claude-plugin; mentions Claude Code; mentions AGENTS.md.

This is sonilo-ai/skills's own configuration. It tells Codex and OpenCode how to work on skills itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything skills configures →

not rated 115repo 6d ago A scan 1,556 tokens original MIT
View source ↗ sonilo-ai/skills
Reuse

Borrowing it

Nothing to install: this file belongs to sonilo-ai/skills. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/sonilo-ai/skills/main/AGENTS.md
Clone the repo
git clone --depth 1 https://github.com/sonilo-ai/skills

Made for: Codex, OpenCode.

Wrote this? Show the measurements

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README.md
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<a href="https://agentmods.dev/instructions/sonilo-ai/skills/agents-md"><img src="https://agentmods.dev/badge/instructions/sonilo-ai/skills/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 1,556 This file is loaded in full into every session.
When invoked 1,556 The same file — it is already loaded in full.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.01556 $0.01556
Opus 5.5 $0.00622 $0.00622
Sonnet 5.5 $0.00311 $0.00311
Haiku 4.5 $0.00156 $0.00156

Measured 5d ago against content hash fbcb9ca185df, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

skills 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 5d 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.

AGENTS.md · 128 lines

How it starts

The opening of the file, as written. The whole thing — 128 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AGENTS.md

Notes for coding agents working in this repo, and for agents that use these skills to call Sonilo.

What this repo is

Agent Skills (per the Agent Skills spec) for Sonilo's music, sound effects, dubbing and audio ducking API. There is no build and no runtime code: every skill is a SKILL.md describing tools that live in other repos (the local sonilo-mcp server, the hosted MCP server at https://api.sonilo.com/mcp, the sonilo CLI and the SDKs). The same directory is also a Claude Code plugin marketplace (.claude-plugin/) and a Muse Code plugin (.muse-plugin/).

Layout

<skill>/SKILL.md          one directory per skill; directory name == frontmatter `name`
references/               shared guidance the skills link to
  api_reference.md        one-page REST reference (base URL, every endpoint, errors)
  api-claims.md           API behaviour verified against the backend
  preflight.md            checks to run before any paid call
  music-prompting.md, sfx-prompting.md
tests/validate.py         the whole test suite
tests/tool_surface.json   recorded tool names, parameters, defaults, CLI flags, banned tokens
evals/routing/            trigger evals: does the right skill load for a query
.claude-plugin/           plugin.json (skill list, version) + marketplace.json
.muse-plugin/plugin.json  same skills and version, plus the hosted MCP server

Commands

python -m pip install PyYAML
python tests/validate.py             # offline; CI runs this on every push and PR
pip install sonilo-mcp
python tests/validate.py --refresh   # re-read the local tool surface from the installed package

CI (.github/workflows/validate.yml) runs both, and fails if --refresh changes tests/tool_surface.json. It also runs weekly, because the tools these skills describe change in other repos.

Making changes

  • A skill's name must equal its directory name; the description must stay under 1024 characters and mention Sonilo, or it never routes.
  • Any tool, parameter, default or sonilo <subcommand> --flag you write in a SKILL.md, README.md or references/*.md is checked against tests/tool_surface.json. If the upstream tool changed, update the surface first, then the prose.
  • The two MCP servers name the task recovery tool differently: get_sfx_task on the local server, get_generation_task on the hosted one. Never mention one without the other.
  • banned_tokens in tool_surface.json lists statements that used to be true. Do not reintroduce them.
  • Adding or renaming a skill: update .claude-plugin/plugin.json, .muse-plugin/plugin.json and the table in README.md. Both manifests carry the same version; bump it in both (commit titles end with the version, e.g. (2.5.1)).
  • When a check misses a bug you fixed by hand, add the case to validate.py.

Read the full file on GitHub · 128 lines

Changes

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.

  1. 5d ago First seen · 128 lines · 1,556 tokens per session scan A fbcb9ca185df

Subscribe to this mod's changes

skills AGENTS.md is an instructions file published in the GitHub repository sonilo-ai/skills (115 stars, last pushed 6d ago), licensed MIT. It adds 1,556 tokens to every session, about $0.0062 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 2026-10-14.

Building agentsWriting and docsagent-skillsai-dubbingai-musicaudio-apimcp
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