AI skills — reusable capabilities an assistant loads on demand.
Browse AI skills on Sigrix: portable SKILL.md capabilities an assistant or agent loads when it needs them. Built on the open agentskills.io spec, so the same file works across Claude, Codex, and the API.
“Converts HTML, rich text, or pasted Word/Docs/Notion content into clean GitHub-Flavored Markdown. Preserves structure, strips presentational junk, tracking, and ad widgets. (197 chars)”
convert-to-markdown
Converts HTML, rich text, or pasted Word/Docs/Notion content into clean GitHub-Flavored Markdown. Preserves structure, strips presentationa…
- A portable SKILL.md that works across Claude, Codex & the API
- Loaded on demand — adds capability without the bloat
- Editable source you own — adapt it to your stack
operations-process
remove-ai-tells
Strip the structural and lexical patterns that mark text as AI-written, while preserving the author's meaning and any stylistic choices that are genuinely theirs. Targets the real tells — hedge stacking ("it's worth noting that," "it's important to remember"), the "not just X, it's Y" construction, tricolon abuse (three parallel phrases for everything), restating-the-intro conclusions, vague intensifiers ("truly," "deeply," "profoundly"), and overused vocabulary ("delve," "tapestry," "navigate t
clean-pasted-text
Fix text that was pasted from a PDF, Word doc, webpage, email, or chat and arrived broken. Repairs smart quotes and curly apostrophes, removes non-breaking spaces and zero-width characters, fixes mid-word line breaks and hyphenation from PDF column wraps, normalizes bullets and dashes, collapses double spaces after periods, strips invisible Unicode trash, and rebuilds paragraph structure when newlines were lost or doubled. Use when the user says the text "looks weird," "won't format right," "has
documents
Publish your own skill
Built a capability worth reusing? Publish it as a skill.
Package your SKILL.md and a worked example into a skill listing. List it free or paid — buyers get instant access and you keep the credit.
About ai skills
What is an AI skill?
An AI skill is a reference document — a SKILL.md file — an assistant or agent loads into context to do a specific job. Skills do not run on their own; they are tools a model picks up when needed.
Sigrix skills follow the open agentskills.io specification, so the same file works in Claude Code, Codex CLI, claude.ai, and the Claude API — buy once, use everywhere.
Compare skills by the job they add, the platforms they have been tested on, and price — a good skill listing bundles the file plus a worked example so you see what 'good' looks like.
What's inside an AI skill
Skills vs prompts, assistants & agents
A skill is one of several AI building blocks on Sigrix. Here is how it differs from the others:
Frequently asked questions
More guides in Sigrix Learn, or read the full buyer & seller FAQ.
An AI skill is a reference document — a SKILL.md file — that an AI assistant or agent loads into context to do a specific job. It adds a capability the model can use on demand.
Yes. Sigrix skills follow the open agentskills.io specification, so the same file works in Claude Code, Codex CLI, claude.ai, and the Claude API.
A prompt is a single instruction you send once. A skill is a reusable capability the model loads whenever the relevant job comes up, without you re-pasting it.
Some skills are free to claim and others are paid — each skill's price is shown on its card and detail page. Either way you own an editable copy once you claim it.
Yes. Approved sellers can publish skills on Sigrix: upload the SKILL.md, add a worked example, set a price, and list it. See the Sell page to get started.