What is skilllite AGENTS.md?

Project instructions for SkillLite, a Rust workspace with a Python interface and built-in SQLite storage. They describe how to build and test it and how to run its sandbox in Cloud Agent environments.

Use them to build, lint, test, and run the Rust command-line tool or Python SDK. They are also useful when diagnosing sandbox namespace errors in Linux environments.

They explain the project structure and document a Linux process-limit setting needed to avoid sandbox startup failures. This reduces trial and error when running skills.

How EXboys/skilllite configures Codex and OpenCode

Reuse

Borrowing it

Nothing to install: this file belongs to EXboys/skilllite. 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/EXboys/skilllite/main/AGENTS.md

Clone the repo

git clone --depth 1 https://github.com/EXboys/skilllite

Made for: Codex, OpenCode.

Wrote 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.

README.md

[![agentmods](https://agentmods.dev/badge/instructions/exboys/skilllite/agents-md/github.svg)](https://agentmods.dev/instructions/exboys/skilllite/agents-md)

Your own site

<a href="https://agentmods.dev/instructions/exboys/skilllite/agents-md"><img src="https://agentmods.dev/badge/instructions/exboys/skilllite/agents-md/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.

Your own site · 80×15

<a href="https://agentmods.dev/instructions/exboys/skilllite/agents-md"><img src="https://agentmods.dev/badge/instructions/exboys/skilllite/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 633 This file is loaded in full into every session.

When invoked 633 The same file — it is already loaded in full.

Security scan B 1 finding. 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.

Model	Per session	Once invoked
Fable 5.1	$0.00633	$0.00633
Opus 5.5	$0.00253	$0.00253
Sonnet 5.5	$0.00127	$0.00127
Haiku 4.5	$0.00063	$0.00063

Measured 2mo ago against content hash 6e3b4874a0c0, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade B, and why

skilllite AGENTS.md scanned grade B with 1 finding 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.

Asks for rootmediumPrivilege escalation

A mod that escalates privileges can change anything on the machine, not only the project.

`bubblewrap` must be installed for sandbox tests (`sudo apt-get install -y bubblewrap`). Without it, only `SKILLLITE_SANDBOX_LEVEL=1` (no sandbox) works.

AGENTS.md · 58 lines

How it starts

The opening of the file, as written. The whole thing — 58 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Agents Instructions

See CLAUDE.md for project workflow, specs, and contribution guidelines.

Cursor Cloud specific instructions

Environment Overview

SkillLite is a Rust workspace (Cargo) with a Python SDK bridge. No Docker, no external databases — entirely self-contained with embedded SQLite.

Key Services

Service	How to run	Notes
Rust binary (CLI)	`cargo build -p skilllite` then `./target/debug/skilllite`	Main dev artifact
Python SDK	`pip install -e python-sdk`	Thin wrapper calling the Rust binary

Running the Sandbox (Linux gotcha)

The default RLIMIT_NPROC (50) is too low in Cloud Agent VMs where ~40+ processes already run under the same UID. Set SKILLLITE_MAX_PROCESSES=200 (or higher) when running skills with sandbox level 2 or 3:

SKILLLITE_MAX_PROCESSES=200 ./target/debug/skilllite run .skills/calculator '{"operation":"add","a":1,"b":2}'

Without this, bwrap fails with "Creating new namespace failed: Resource temporarily unavailable".

Lint / Test / Build Commands

Rust format check: cargo fmt --check
Rust lint: cargo clippy --all-targets -- -D warnings
Rust tests: cargo test
Rust build: cargo build (debug) or cargo build --release
Python lint: ruff check python-sdk/
Python tests: cd python-sdk && pytest

See docs/en/CONTRIBUTING.md for full PR checklist.

Rust Toolchain

This project requires Rust 1.85+ (edition 2024 support). The update script runs rustup update stable to ensure this. If rustc --version shows < 1.85, run rustup update stable && rustup default stable.

Sandbox Binary (bwrap)

bubblewrap must be installed for sandbox tests (sudo apt-get install -y bubblewrap). Without it, only SKILLLITE_SANDBOX_LEVEL=1 (no sandbox) works.

Python venv

python3-venv (or python3.12-venv) is required for skill environment setup. Skills with dependencies create virtualenvs via python3 -m venv. Install with sudo apt-get install -y python3-venv.

Read the full file on GitHub · 58 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.

2mo ago First seen · 58 lines · 633 tokens per session scan B 6e3b4874a0c0

Subscribe to this mod's changes

skilllite AGENTS.md is an instructions file published in the GitHub repository EXboys/skilllite (152 stars, last pushed 4d ago), licensed MIT. It adds 633 tokens to every session, about $0.0025 per session on Opus 5.5. A static security scan graded it B with 1 finding (asks for root). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

agentskills ai-agents rust-sandbox sandbox self-evolving

skilllite AGENTS.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
skilllite AGENTS.mdEXboys/skilllite	Instructions file	152	4d ago	MIT	B	633	Codex, OpenCode
vscode buildNext.instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	9,719	GitHub Copilot
next.js AGENTS.mdvercel/next.js	Instructions file	143k	yesterday	MIT	A	7,461	Codex, OpenCode
langchain AGENTS.mdlangchain-ai/langchain	Instructions file	149k	yesterday	MIT	A	4,680	Codex, OpenCode
vscode oss-third-party-notices.instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	5,516	GitHub Copilot
vscode copilot-instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	3,093	GitHub Copilot
deepseek-harness AGENTS.mddeepseek-ai/deepseek-harness	Instructions file	274k	2d ago	MIT	A	4,313	Codex, OpenCode

skilllite: Instructions file for Codex