install-skilllisted

Install a Claude Code skill from a GitHub skills repository URL. ## Steps 1. **Route the input.** Decide whether the user gave a GitHub tree URL or a repo/skill reference. - Completion criterion: the input is classified as exactly one of URL or reference. 2. **Extract repo and skill path.** For a tree URL of the form `https://github.com/OWNER/REPO/tree/<ref>/skills/<category>/<skill>`, extract `OWNER/REPO` and the path under `skills/` — for example, `productivity/writing-great-skills`. If the user gave `OWNER/REPO <path>` directly, use it as-is. - Completion criterion: both the repository and the skill path are identified. 3. **Install for Claude Code.** Run: ```bash gh skill install <repo> <skill-path> --agent claude-code ``` - Completion criterion: the command exits successfully. 4. **Report result.** Show the installed skill path and any warnings. - Completion criterion: the user can see whether the install succeeded. ## Failure modes - `gh` missing or unauthenticated: stop and ask the user to run `gh auth login`. - URL with no `skills/` segment: stop and ask for a repo/skill reference. - `gh skill install` fails: print the full error and do not retry.