docs: simplify install instructions to just npx skills

Author: zeke

README.md

@@ -8,32 +8,6 @@ Discover, compare, and run AI models using Replicate's API.
 
 These skills work with any agent that supports the [Agent Skills standard](https://agentskills.io/specification), including Claude Code, OpenCode, OpenAI Codex, and Pi.
 
-### npx skills
-
-Install using the [`npx skills`](https://skills.sh) CLI:
-
-```
-npx skills add https://github.com/replicate/skills
-```
-
-### Claude Code
-
-Install using the [plugin marketplace](https://code.claude.com/docs/en/discover-plugins#add-from-github):
-
-```
-/plugin marketplace add replicate/skills
 ```
-
-### ClawHub
-
-Install using the [ClawHub](https://clawhub.ai) CLI:
-
-```
-npx clawhub@latest install replicate
-```
-
-### OpenCode
-
-OpenCode automatically discovers Claude Code skills installed under `~/.claude/skills/`.
-
-You can also copy `skills/replicate` into `~/.config/opencode/skills/replicate`.
+npx skills add replicate/skills
+```