Rework README: multi-harness install, drop static plugin table

- Add install examples for Cursor, Copilot CLI, Gemini CLI, Codex/OpenCode
- Remove static plugin table (goes stale), link to catalog.md instead
- Reorganize into Install / Update / Verify / Team Setup sections

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: astefanutti

README.md

@@ -5,9 +5,9 @@
 Central registry for AI skills and plugins developed across the opendatahub-io organization.
 Works as both a **Claude Code marketplace** (native integration) and a **universal skill catalog** for other agent harnesses.
 
-## Quick Start
+## Installation
 
-### Install
+### Claude Code
 
 ```bash
 # Add the marketplace
@@ -20,7 +20,44 @@ claude plugin marketplace add opendatahub-io/skills-registry
 /plugin install rfe-creator@opendatahub-skills
 ```
 
-### Update
+### Cursor
+
+```
+/add-plugin opendatahub-io/skills-registry
+```
+
+### GitHub Copilot CLI
+
+```bash
+copilot plugin marketplace add opendatahub-io/skills-registry
+copilot plugin install rfe-creator@opendatahub-skills
+```
+
+### Gemini CLI
+
+```bash
+gemini extensions install https://github.com/opendatahub-io/skills-registry
+```
+
+### Codex / OpenCode
+
+Tell the agent:
+
+> Fetch and follow instructions from https://raw.githubusercontent.com/opendatahub-io/skills-registry/main/registry.yaml
+
+### Other Agent Harnesses
+
+The registry metadata is available at:
+
+```
+https://raw.githubusercontent.com/opendatahub-io/skills-registry/main/registry.yaml
+```
+
+It contains all plugin metadata including per-harness install instructions, skill lists, dependencies, and source references.
+
+## Update
+
+### Claude Code
 
 ```bash
 # Update a specific plugin
@@ -30,17 +67,23 @@ claude plugin marketplace add opendatahub-io/skills-registry
 /plugin update
 ```
 
-### Verify
+### Gemini CLI
+
+```bash
+gemini extensions update opendatahub-io/skills-registry
+```
+
+## Verify
 
-After installing, start a new Claude Code session and invoke a skill:
+After installing, start a new session and invoke a skill:
 
 ```bash
 /rfe.create
 ```
 
 If the skill responds, the plugin is installed correctly.
 
-### Team Setup
+## Team Setup
 
 Add to your project's `.claude/settings.json` to auto-enable for all developers:
 
@@ -57,27 +100,9 @@ Add to your project's `.claude/settings.json` to auto-enable for all developers:
 }
 ```
 
-### Other Agent Harnesses
-
-The registry metadata is available as a YAML file at:
-
-```
-https://raw.githubusercontent.com/opendatahub-io/skills-registry/main/registry.yaml
-```
-
-It contains all plugin metadata including per-harness install instructions, skill lists, dependencies, and source references. Parse it to integrate with any agent framework.
-
 ## Available Plugins
 
-| Plugin | Description | Version |
-|--------|-------------|---------|
-| [rfe-creator](https://github.com/jwforres/rfe-creator) | RFE creation, review, and submission pipeline | 0.1.0 |
-| [assess-rfe](https://github.com/n1hility/assess-rfe) | RFE quality assessment against a structured rubric | 1.0.0 |
-| [rhoai-security-reviewer](https://github.com/astefanutti/rhoai-security-reviewer) | Consensus-based security review for RHOAI strategies | 0.1.0 |
-| [test-plan](https://github.com/fege/test-plan) | Test plan and test case generation from strategies | 0.1.0 |
-| [quality-tooling](https://github.com/antowaddle/Red-Hat-Quality-Tiger-Team) | Repository analysis, build validation, and test patterns | 1.0.0 |
-
-See [catalog.md](catalog.md) for the full list with skills and install commands.
+See [catalog.md](catalog.md) for the full list of plugins, skills, and install commands.
 
 ## Structure