Skill Creator suits developers who want a documented, repeatable way to package new agent capabilities instead of writing ad hoc system prompts. It replaces guesswork about SKILL.md structure with a step-by-step init-to-submit workflow and a framework for deciding how prescriptive each instruction should be. Best for teams building several skills, not a one-off prompt tweak.
Orthogonal's Skill Creator is a meta-skill: an open-source SKILL.md file, one of 90+ in its catalog, that teaches AI agents to write new SKILL.md skills instead of connecting to an outside API. It defines the frontmatter trigger format, a degrees-of-freedom framework for matching instruction detail to task risk, and the orth CLI commands used to scaffold and publish a skill.
Maker: Orthogonal · Protocol: CUSTOM · Auth: api key
Compatible agents: Claude Code, Cursor, Any orth CLI-compatible agent, OpenClaw, Any MCP-compatible client
Required runtime: Node >= 18 (for orth CLI), Orthogonal account
About Skill Creator
Skill Creator is one of 90+ open-source SKILL.md files in the orthogonal-sh/skills repository. The repository comes from Orthogonal, a Y Combinator W26 company whose founders, Christian Pickett and Bera Sogut, spent their earlier careers on payments and billing infrastructure (Coinbase, Vercel) and on abuse-prevention and robotics systems (Google's reCAPTCHA and Maps, then Amazon Robotics). They built the repo so agents could extend their own capabilities in a documented format. Unlike most entries in the catalog, Skill Creator is not a connector to an outside API: it is a workflow guide agents follow when writing a new SKILL.md file. A SKILL.md pairs a YAML frontmatter block (name, description) with instructions the agent loads only once a user request matches the description field, so Skill Creator insists every 'when to use' cue sits in that frontmatter rather than the body. It also teaches authors to size instructions to how easily a step can go wrong: plain text for open-ended judgment calls, pseudocode for a preferred pattern, and exact scripts for steps that are fragile or error-prone. Publishing runs through the orth CLI: `orth skills init` scaffolds a new skill directory, `orth skills submit` pushes it to the Orthogonal catalog for other agents to discover, and `orth skills update` revises a skill that is already live.
Key Features
- SKILL.md Structure Guide: Defines the exact SKILL.md format: YAML frontmatter with name (lowercase, hyphens, under 64 chars) and description (the trigger mechanism), followed by instructions with optional scripts/, references/, and assets/ directories.
- Degrees-of-Freedom Framework: A 3-level specificity model: high-freedom text for open-ended tasks, medium-freedom pseudocode for preferred patterns, and low-freedom scripts for fragile operations, so authors match format to task risk.
- Understand-Plan-Init-Implement-Submit Workflow: A fixed sequence agents follow: gather usage examples, identify reusable scripts and references, scaffold with the CLI, write the SKILL.md, then submit it for catalog review.
- Progressive Disclosure Pattern: Keeps SKILL.md files under 500 lines by splitting complex domain docs into separate references/ files the agent loads only when a task actually needs them.
- CLI Publishing Commands: `orth skills init <name>` scaffolds a directory, `orth skills submit <path>` publishes to the catalog, and `orth skills update <slug> <path>` revises a live skill, with an optional --path flag.
- Token Efficiency Rules: Excludes README, changelog, and setup docs from skill packages, and pushes authors to challenge every paragraph for the context-window cost it adds.
How to Invoke
Agent reads SKILL.md instructions and follows the 5-step creation process: understand, plan, initialize with `orth skills init`, implement, and submit with `orth skills submit`
Pricing
Reading or copying the Skill Creator SKILL.md costs nothing at all: it's released under an open license with no strings attached. An Orthogonal account is required to run the orth CLI commands that scaffold and publish a skill, and new accounts start with $10 in credit. That credit is spent by APIs the finished skills call at runtime, not by writing or publishing the skill itself.
Strengths
- Gives skill authors a repeatable checklist instead of reinventing SKILL.md structure from scratch each time, which is the main reason reviewers cite for using it over writing free-form.
- The progressive disclosure habit it teaches keeps published skills lean, so agents loading several skills at once don't burn context on the ones they aren't using.
- Open source, so the SKILL.md itself is a free reference even for teams that never touch the Orthogonal CLI or catalog.
Weaknesses
- It's a workflow guide, not enforced tooling: if an agent skims the instructions, the resulting skill can still ship with a broken frontmatter description or a missing directory.
- Skills published through it only surface in the Orthogonal catalog, not in the Claude skills directory or Cursor's own extension index.
- Deciding what belongs in the SKILL.md body versus a references file is a judgment call the tool doesn't automate, so first-time authors still spend real editing time on it.
Frequently Asked Questions
What does Skill Creator actually cost?
Skill Creator has no price of its own: the SKILL.md is open source, so reading, copying, or adapting it is free with no account needed. Running the `orth skills init` and `orth skills submit` commands requires a free Orthogonal account. Any spend only happens later, when a skill you built calls a paid API at runtime.
Can you use Skill Creator without paying?
Yes, fully: there is no paid tier of the Skill Creator skill itself. A free Orthogonal account covers the CLI commands used to build and publish skills, and new signups start with $10 of credit for the APIs those finished skills call, not for the creation workflow. Nothing about Skill Creator requires a paid plan.
Which tools compete with Skill Creator in 2026?
The most direct alternative is writing a SKILL.md by hand from Anthropic's own documentation, which needs no account and produces the same file format. Cursor Rules (.cursorrules) cover similar agent-customization ground for Cursor specifically, but use a different, non-portable format. OpenClaw has its own compatible-but-distinct skill format. Skill Creator's edge over writing by hand is the degrees-of-freedom framework and direct CLI publishing to the Orthogonal catalog.
What separates Skill Creator from writing a SKILL.md manually?
Manual authoring is faster for a single simple skill because it skips signing up for anything. Skill Creator earns its keep on decisions manual authors get wrong most often: picking the right degrees-of-freedom level, deciding what to split into a references file to stay under the line limit, and writing a frontmatter description that actually triggers. It also scaffolds the scripts, references, and assets folders for you, named consistently.
What does it take to start using Skill Creator?
Sign up for a free account at orthogonal.com; no credit purchase is needed just to build skills. Run `npm install -g @orth/cli`, log in with `orth login`, then scaffold a new skill folder. Write the SKILL.md frontmatter and instructions, test it on a real task, then publish it to the catalog.