> ## Documentation Index > Fetch the complete documentation index at: https://docs.fixaeo.com/llms.txt > Use this file to discover all available pages before exploring further. # Skills > Reusable, named instructions you write once and attach to any agent. A skill is a named instruction you write once and reuse. Instead of re-typing "keep the tone plain" or "never invent a source" into every agent, you save that behaviour as a skill and attach it. Every AI step in an agent then follows it. Skills live on the **Skills** tab of the [Agents](/agents) area, at `/app/workflows`. Agents are also called workflows in a few places in the app; they're the same thing. Agents are in **Beta** and review-gated. A skill only shapes how an agent writes. It never publishes, sends, or approves anything on its own. AI-generated work still waits for your review before you use it. ## The four built-in skills FixAEO ships four skills out of the box. They carry a **Built in** badge: * **Humanizer** — makes generated writing feel natural and specific instead of robotic. * **Improved Copywriting** — sharpens clarity and persuasion without adding claims the evidence doesn't support. * **Match Brand Voice** — keeps wording aligned with your connected brand context. * **Citation Guard** — keeps factual claims traceable to the sources the agent was given. You can't edit, archive, or delete a built-in skill. To make one your own, **Duplicate** it. The copy is a normal custom skill you can change freely. ## Create your own Click **New skill** and fill in four things: A short label, up to 80 characters. This is what you'll pick from the list later. One of **Writing**, **Brand**, **Evidence**, **Quality**, or **Custom**. Category only helps you filter the list. A "when to use it" line, up to 500 characters. It helps you and your teammates choose the right skill later. What the skill should actually do, up to 12,000 characters. Be concrete about tone, evidence, claims, and output. A focused instruction is easier to reuse than a sprawling one. Use **Preview instructions** to see how the skill will read to the agent before you save it. Keep each skill to one job. A "plain, human tone" skill and a "never invent a statistic" skill are easier to mix and match than one skill that tries to do both. ## Manage your skills The Skills tab has category chips and a **Search skills** box so you can find a skill by name, description, or instruction text. Each custom skill has an actions menu: * **Duplicate** — make an editable copy of any skill, built-in or custom. * **Archive skill** — hide a skill you're not using without losing it. **Restore skill** brings it back. Archived skills sit behind the **Archived** filter. * **Delete skill** — a permanent removal. You type the skill's name to confirm. It's removed from current agent drafts, but published agent versions and past runs keep their own frozen copies. ### Version history Every time you save a change, FixAEO records a new immutable version. Open **History** on a skill to see each version with its date and instructions; the latest is marked **Current**. Older versions are kept, not overwritten, so you can always see what an earlier run followed. ## Attach a skill to an agent Open an agent in the builder and use the **Skills** button (labelled **Skills** in the toolbar, with a count when some are attached). This opens **Skills for this workflow**, where you: * Choose up to **10** skills. * Set the order they run in — skills apply top to bottom on every AI step. * Remove ones you no longer want. Only the agent's owner can change its attached skills. Editors and viewers can see them. See [Agents](/agents) for how sharing and roles work. You can also switch individual skills off before a manual run, without changing the saved setup. ### Save an assistant reply as a skill When an agent or the [AI Marketer](/ai-marketer) writes something you'd want to reuse as an instruction, use **Save as skill** on that reply. The response becomes the new skill's instructions, so you don't have to re-write it by hand. Pick a name and category, and it lands in your Skills library ready to attach. ## Skills freeze at run time Editing a skill later never rewrites the past. A run keeps the exact version of every skill it used, and a published agent version keeps the versions it was published with. So: * Changing a skill does **not** change results you've already produced. * To make a change take effect in an agent, publish a new version of that agent so it picks up the current skill versions. This is what keeps your history honest — you can always trace what any past result was told to do. Skills are also readable through FixAEO's read-only public API, so you can review them outside the app. Building, organizing, and saving skills is broadly available. **Running** an agent needs an active paid plan — including any run that uses your skills. Your saved work stays available either way. See [Plans and limits](/plans-and-limits). ## Related Build an agent, then attach your skills to its AI steps. Ready-made agents to start from instead of a blank canvas. Run a published agent on a schedule, a webhook, or in bulk. Brand kits, knowledge bases, and the approval checkpoints your runs pause at. The conversational sibling — and where "Save as skill" often starts. What's free, what needs a paid plan, and the run limits.