docs: add skill install command to README and docs

README.md

@@ -124,6 +124,12 @@ See [ROADMAP.md](ROADMAP.md) for planned features: cost tracking, offline evalua
 
 `skills/regtrace/` teaches AI coding agents how to use regtrace — golden sets, evaluation, regression, CI integration.
 
+```bash
+npx skills add decimozs/regtrace/skills/regtrace
+```
+
+Once installed, type `/regtrace init` in your agent's chat to auto-detect LLM calls and scaffold the project.
+
 ## Launch links
 
 - [Product Hunt](https://www.producthunt.com/p/regtrace)

apps/docs/content/docs/reference/agent-skills.mdx

@@ -7,6 +7,14 @@ description: Agent skill for teaching AI agents about the regtrace CLI
 use the regtrace CLI. Agents load it automatically when a user asks about
 LLM output quality, golden sets, or regtrace commands.
 
+## Installation
+
+```bash
+npx skills add decimozs/regtrace/skills/regtrace
+```
+
+This registers the skill with your agent harness (OpenCode, Claude Code, Cursor, Zed, etc.). The agent then loads it automatically when you ask about LLM quality, golden sets, or regtrace commands.
+
 ## Contents
 
 | File | Purpose |

apps/docs/content/docs/tutorials/getting-started.mdx

@@ -58,9 +58,14 @@ This creates:
 - `.regtrace/runs/` — local run storage
 
 <Callout type="tip">
-  **Using an AI coding agent?** Run `/regtrace init` in OpenCode, Claude Code,
-  Cursor, or Zed to auto-detect LLM calls in your project and generate
-  tailored golden sets — no manual editing needed. See the
+  **Using an AI coding agent?** First install the regtrace skill:
+
+  ```bash
+  npx skills add decimozs/regtrace/skills/regtrace
+  ```
+
+  Then run `/regtrace init` in your agent's chat to auto-detect LLM calls
+  and generate tailored golden sets — no manual editing needed. See the
   [Agent Skill](/docs/reference/agent-skills) reference.
 </Callout>