sutras

sutras is a skill for Claude Code from anistark/sutras. It costs 72 tokens per session (1,400 once invoked), scanned A, original, MIT.

A command-line toolkit for creating and managing Anthropic Agent Skills, which are reusable instructions and tools for an AI coding agent. It covers the skill's lifecycle from setup and checking to packaging and publishing.

In plain words
What is it for?
Use it to scaffold skills, validate SKILL.md files, generate documentation, run evaluations and tests, build distributable packages, and install or publish skills.
Why use it?
It gathers common skill-development tasks in one command-line tool, reducing the need to manage structure, checks, tests, packages, and registry distribution separately.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin. Also seen: reads .claude/ paths; mentions Claude Code.

Part of the sutras plugin — 2 skills shipped together

Good fit Use it to scaffold skills, validate SKILL.md files, generate documentation, run evaluations and tests, build distributable packages, and install or publish skills.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/anistark/sutras/sutras
Install

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.

Any agent
npx skills add anistark/sutras --skill sutras
Clone the repo
git clone --depth 1 https://github.com/anistark/sutras

Made for: Claude Code.

Or install sutras, the plugin that ships this one along with the rest of its 2 skills.

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.

agentmods badge for sutras

README.md
[![agentmods](https://agentmods.dev/badge/skills/anistark/sutras/sutras.svg)](https://agentmods.dev/skills/anistark/sutras/sutras)
Your own site
<a href="https://agentmods.dev/skills/anistark/sutras/sutras"><img src="https://agentmods.dev/badge/skills/anistark/sutras/sutras.svg" alt="Measured on agentmods" height="20"></a>
Per session 72 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,400 The whole file, excluding the scripts and references it only reads on demand.
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 $0.00072 $0.01400
Opus 5 $0.00036 $0.00700
Sonnet 5 $0.00014 $0.00280
Haiku 4.5 $0.00007 $0.00140

Measured 7d ago against content hash 0533b27d7ee4, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade A, and why

sutras 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 7d 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.

pi/skills/sutras/SKILL.md · 180 lines

How it starts

The opening of the file, as written. The whole thing — 180 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Sutras — Skill Development Toolkit

Sutras is a CLI for the full lifecycle of Anthropic Agent Skills: scaffolding, validation, testing, evaluation, packaging, and distribution.

Command Reference

sutras build <name>
    Build a distributable package for a skill.
    --output/-o: Output directory for the package (default: ./dist)
    --no-validate (flag): Skip validation before building

sutras completion <shell>
    Generate shell completion script.

sutras docs <name>
    Generate documentation for a skill.
    --output/-o: Output file or directory (default: print to stdout)
    --no-supporting (flag): Exclude supporting file contents (examples.md, etc.)

sutras eval <name>
    Evaluate a skill using configured metrics.
    --verbose/-v (flag): Enable verbose evaluation output
    --no-history (flag): Don't save evaluation results to history
    --show-history (flag): Show evaluation history for this skill

sutras info <name>
    Show detailed information about a skill.

sutras install <source>
    Install a skill from various sources.
    --version/-v: Specific version (for registry installs)
    --registry/-r: Registry to install from (for registry installs)

sutras list
    List available skills.
    --local (flag): Include project skills from .claude/skills/
    --global (flag): Include global skills from ~/.claude/skills/

sutras new [name]
    Create a new skill with proper structure.
    --description/-d: Skill description (what it does and when to use it)
    --author/-a: Skill author name
    --template/-t: Template to use (run with --list-templates to see options)
    --list-templates (flag): List available skill templates
    --global (flag): Create in global skills directory (~/.claude/skills/)

sutras publish [skill_path]
    Publish a skill to a registry.
    --registry/-r: Registry to publish to (default: default registry)
    --pr (flag): Use pull request workflow instead of direct push
    --build-dir/-b: Custom build directory

sutras registry add <name> <url>
    Add a new registry.
    --namespace/-n: Default namespace for this registry
    --auth-token/-t: Authentication token
    --priority/-p: Registry priority (higher = checked first)
    --default (flag): Set as default registry

sutras registry build-index <registry_path>
    Generate index.yaml for a local registry.
    --output/-o: Output path for index.yaml (default: <registry_path>/index.yaml)

sutras registry list
    List configured registries.

sutras registry remove <name>
    Remove a registry.

sutras registry update [name]
    Update cached registry indexes.
    --all (flag): Update all registries

sutras setup
    Install the sutras skill into Claude Code's global skills directory.
    --check (flag): Show what would be installed without making changes
    --uninstall (flag): Remove the sutras skill from Claude Code

sutras test <name>
    Run tests for a skill.
    --verbose/-v (flag): Enable verbose test output
    --fail-fast/-x (flag): Stop on first test failure

sutras uninstall <skill_name>
    Uninstall a skill.
    --version/-v: Specific version to uninstall (default: all versions)

sutras update
    Check for updates and upgrade sutras to the latest version.
    --version/-v: Update to a specific version (default: latest)
    --check (flag): Only check if an update is available, don't install
    --skip-pi (flag): Skip updating the pi extension
    --skip-skill (flag): Skip refreshing the global skill (~/.claude/skills/sutras/)

sutras validate [target]
    Validate a skill's structure and metadata.
    --all (flag): Validate all skills discovered in the skills directory
    --path: Skills directory to search (for --all), or a custom search path for a named skill
    --strict (flag): Enable strict validation (warnings become errors)

Read the full file on GitHub · 180 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. 7d ago First seen · 180 lines · 72 tokens per session scan A 0533b27d7ee4

Subscribe to this mod's changes

sutras is a skill published in the GitHub repository anistark/sutras (5 stars, last pushed 4mo ago), licensed MIT. It adds 72 tokens to every session and 1,400 once invoked, about $0.0004 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.

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