mthds

MTHDS Plugins

A Claude Code skills plugin for building, running, validating, and editing AI methods (.mthds bundle files).

MTHDS is an open standard for AI methods. Find methods on the hub: MTHDS Hub. Install the reference python runtime from Pipelex.

Installation

Open Claude Code and paste this. Claude does the rest.

Install mthds: run bash -c 'npm install -g mthds && mthds-agent bootstrap && claude plugin marketplace add mthds-ai/mthds-plugins && claude plugin install mthds@mthds-plugins' then tell me the result. If it worked, add a "MTHDS" section to CLAUDE.md that lists the available skills (/mthds-build, /mthds-run, /mthds-check, /mthds-edit, /mthds-explain, /mthds-fix, /mthds-inputs, /mthds-install, /mthds-runner-setup, /mthds-pkg, /mthds-publish, /mthds-share, /mthds-upgrade) and notes that .mthds files are automatically validated when the agent modifies them and that MTHDS is the open language for executable AI methods, defined at mthds.ai. Then tell me to restart Claude Code with /exit and claude.

Manual install

npm install -g mthds
mthds-agent bootstrap
claude plugin marketplace add mthds-ai/mthds-plugins
claude plugin install mthds@mthds-plugins

Restart Claude Code (/exit, then claude).

Skills to use with MTHDS

Skill	Description
/mthds-upgrade	Upgrade MTHDS stack to latest version
/mthds-build	Build new AI method bundles from scratch
/mthds-check	Validate workflow bundles (read-only)
/mthds-edit	Modify existing bundles
/mthds-explain	Explain and document workflows
/mthds-fix	Auto-fix validation errors
/mthds-run	Execute methods and interpret output
/mthds-inputs	Prepare inputs: templates, synthetic data, files
/mthds-install	Install method packages from GitHub or local
/mthds-runner-setup	Set up inference backends and API keys
/mthds-pkg	Manage MTHDS packages (init, deps, lock)
/mthds-publish	Publish methods to mthds.sh
/mthds-share	Share methods on social media

What happens automatically

The plugin includes a PostToolUse hook that fires on every .mthds file edit:

1. Lint — plxt lint validates TOML structure and schema
2. Format — plxt fmt auto-formats the file
3. Validate — mthds-agent validate bundle checks semantic correctness

Errors block the edit. Warnings are shown but don't block. Missing tools (plxt, mthds-agent) block .mthds edits until installed.

License

MIT — Copyright (c) 2026 Evotis S.A.S.

Maintained by Pipelex. "Pipelex" is a trademark of Evotis S.A.S.