Built-in skills for agent harnesses.

The skills baked into the HarnessRouter image. Every Harness can use them, and every Harness can switch any of them off.

A skill is a folder with a SKILL.md in it — instructions an agent loads when the task calls for them, plus any scripts and reference material those instructions point at. This repository is the source of the built-in set; the image build pulls it in.

What is here

Skill	What it does	Origin
pdf	Create PDFs from HTML with real page control; extract text and tables; merge, split, rotate, stamp; list and fill form fields; render pages to PNG for visual checking	HarnessRouter, Apache-2.0
officecli	Create, read and edit .docx, .xlsx, .pptx — styles, tables, formulas, pivot tables, charts, tracked changes	iOfficeAI/OfficeCLI v1.0.143, Apache-2.0 — see NOTICE

skills.json

The manifest at the root decides what ships and what starts on:

{ "name": "pdf", "include": true, "default_enabled": true }

• include — copy this folder into the image at build time. false keeps the skill in the repository for anyone who wants it, and out of the shipped image.
• default_enabled — a newly created Harness starts with this skill on. It is never a promise that it stays on: a Harness can switch any built-in off, and that choice always wins.

The folder name is the skill name and must match name.

Adding a skill

1. Create a folder named for the skill, containing SKILL.md with name and description in its frontmatter. The description is what decides whether the skill gets loaded at all — write it as a list of the situations that should trigger it, and the ones that should not.
2. Declare what it needs. The build honours all three for every included skill:
   • requirements.txt — Python packages
   • apt-packages.txt — system packages, one per line
   • install.sh — anything else. Runs as root with network access, at build time only
3. Add an entry to skills.json.
4. Make sure it works without a network. A task has no internet access, so a skill that downloads a template or installs a package at run time fails in a way that looks like a broken tool.

Resources

• HarnessRouter — the open-source engine that loads these skills.
• Documentation and Cloud — hosted service, guides, and pricing.
• Unified Harness Protocol — the open standard behind it.
• Discord — community for questions and integrations.

Licensing

The skills here are Apache-2.0, either written for this repository or vendored from an Apache-2.0 upstream with attribution preserved in a NOTICE.md recording what was changed.

Anthropic's docx, pdf, pptx and xlsx skills are deliberately not here. They are source-available rather than open source, and their licence forbids copying them, distributing them, and creating derivative works — which is exactly what bundling them into a distributed image would be. Be careful with third-party skill collections: at least one popular Apache-2.0-labelled repository ships those files verbatim, frontmatter still reading license: Proprietary. The label on the repository does not change the licence on the file.