Update README to reflect new plugin packaging (#96)

* Update README to reflect new plugin packaging

Remove reference to the old agent-skills mono-plugin repo. Link to the
per-harness plugin repos (Claude Code, Cursor, Codex) and present the
standalone installation options after the plugin links.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* Mark .NET SDK as supported

.NET support has landed — move from 🚧 to ✅.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

Author: starfleeth

README.md

@@ -8,24 +8,26 @@ A comprehensive skill for developers to use when building [Temporal](https://tem
 
 ## Installation
 
-### As a Claude Code Plugin
+### As a Plugin
 
-This skill is housed within a [Claude Code plugin](https://github.com/temporalio/agent-skills), which provides a simple way to install and receive future updates to the skill.
+This skill is packaged as a plugin for major coding agents, which provides a simple way to install and receive future updates:
 
-1. Run `/plugin marketplace add temporalio/agent-skills`
-2. Run `/plugin` to open the plugin manager
-3. Select **Marketplaces**
-4. Choose `temporal-marketplace` from the list
-5. Select **Enable auto-update** or **Disable auto-update**
-6. run `/plugin install temporal-developer@temporalio-agent-skills`
-7. Restart Claude Code
+- **Claude Code**: [temporalio/claude-temporal-plugin](https://github.com/temporalio/claude-temporal-plugin)
+- **Cursor**: [temporalio/cursor-temporal-plugin](https://github.com/temporalio/cursor-temporal-plugin)
+- **OpenAI Codex**: [temporalio/codex-temporal-plugin](https://github.com/temporalio/codex-temporal-plugin)
 
-### Via `npx skills` - supports all major coding agents
+See each repo's README for installation instructions.
+
+### Standalone Installation
+
+If you prefer to install the skill directly without the plugin wrapper:
+
+#### Via `npx skills` — supports all major coding agents
 
 1. `npx skills add temporalio/skill-temporal-developer`
 2. Follow prompts
 
-### Via manually cloning the skill repo:
+#### Via manually cloning the skill repo
 
 1. `mkdir -p ~/.claude/skills && git clone https://github.com/temporalio/skill-temporal-developer ~/.claude/skills/temporal-developer`
 
@@ -37,6 +39,6 @@ Appropriately adjust the installation directory based on your coding agent.
 - [x] TypeScript ✅
 - [x] Go ✅
 - [x] Java ✅
-- [ ] .NET 🚧 ([PR](https://github.com/temporalio/skill-temporal-developer/pull/39))
+- [x] .NET ✅
 - [ ] Ruby 🚧 ([PR](https://github.com/temporalio/skill-temporal-developer/pull/41))
 - [ ] PHP 🚧 ([PR](https://github.com/temporalio/skill-temporal-developer/pull/40))