Update documentation for v0.2.1 release

Update CHANGELOG.md and README.md with v0.2.1 release information:
- Added OpenCode CLI agent (11 agents total)
- Fixed Amp and Codex package names for automated upgrades
- Added referral links section for project support
- Enhanced installation documentation

Also updated registry test to reflect Amp's new installable status.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <[email protected]>

Author: kevinelliott

CHANGELOG.md

@@ -7,6 +7,35 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [v0.2.1] - 2025-10-20
+
+### Added
+- **OpenCode CLI Agent**: Complete integration for SST's OpenCode terminal-native AI coding agent
+  - Full adapter implementation with non-interactive `opencode run` mode
+  - npm package support: `opencode-ai@latest`
+  - Quiet flag for non-interactive execution
+  - Comprehensive documentation and troubleshooting
+  - Now 11 supported AI agent CLIs
+- **Referral Links Section**: New dedicated section in README to support project development
+  - Qoder referral link for users to support ongoing development
+  - Clear explanation of how referral links help fund the project
+
+### Fixed
+- **Amp CLI**: Updated to support npm-based installation and automated upgrades
+  - Changed from manual-only to `npm install -g @sourcegraph/amp`
+  - Now supports `agentpipe agents upgrade amp`
+- **Codex CLI**: Fixed npm package name for correct version detection
+  - Corrected from `@openai/codex-cli` to `@openai/codex`
+  - Added homebrew installation option: `brew install --cask codex`
+  - Automated upgrades now work correctly
+
+### Improved
+- **Documentation**: Enhanced installation instructions for multiple agents
+  - Added npm and homebrew options where applicable
+  - Updated Prerequisites section with all installation methods
+  - Added OpenCode to adapter reference implementations
+- **Tests**: Updated registry tests to reflect Amp's new installable status
+
 ## [v0.2.0] - 2025-10-20
 
 ### Added
@@ -401,7 +430,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - **Clean Message Display**: Smart consolidation of headers and proper paragraph formatting
 - **Cost Transparency**: See exactly how much each conversation costs
 
-[Unreleased]: https://github.com/kevinelliott/agentpipe/compare/v0.2.0...HEAD
+[Unreleased]: https://github.com/kevinelliott/agentpipe/compare/v0.2.1...HEAD
+[v0.2.1]: https://github.com/kevinelliott/agentpipe/compare/v0.2.0...v0.2.1
 [v0.2.0]: https://github.com/kevinelliott/agentpipe/compare/v0.1.5...v0.2.0
 [v0.1.5]: https://github.com/kevinelliott/agentpipe/compare/v0.1.4...v0.1.5
 [v0.1.4]: https://github.com/kevinelliott/agentpipe/compare/v0.1.3...v0.1.4

README.md

@@ -92,31 +92,28 @@ All agents now use a **standardized interaction pattern** with structured three-
 
 See [CHANGELOG.md](CHANGELOG.md) for detailed version history and release notes.
 
-**Latest Release**: v0.2.0 - Enhanced agent version management with automated upgrades.
+**Latest Release**: v0.2.1 - Added OpenCode agent and improved package management.
 
-**What's New in v0.2.0**:
+**What's New in v0.2.1**:
 
 ✨ **New Features:**
-- **Agent Upgrade Command**: Easily update AI agent CLIs
-  - `agentpipe agents upgrade <agent>` - Upgrade specific agents
-  - `agentpipe agents upgrade --all` - Upgrade all installed agents
-  - Cross-platform support with automatic OS detection
-- **Automated Version Detection**: Real-time version checking for all agents
-  - Parallel version checks with ~70% performance improvement (10s → 3.7s)
-  - Support for multiple package managers (npm, homebrew, GitHub, scripts, manifests)
-  - No more "manual install" placeholders - all agents show actual versions
+- **OpenCode CLI Agent**: SST's terminal-native AI coding agent
+  - 11 supported agents total
+  - Multi-provider support with non-interactive mode
+  - npm package: `opencode-ai@latest`
+- **Referral Links**: New section to support project development
 
 🐛 **Bug Fixes:**
-- **npm 404 Errors**: Corrected package names for Claude, Codex, and Gemini
-- **Ollama Version Detection**: Now works without running Ollama instance
-  - Parses version from warning messages
+- **Amp CLI**: Now supports npm installation and automated upgrades
+- **Codex CLI**: Fixed package name from `@openai/codex-cli` to `@openai/codex`
+  - Added homebrew support: `brew install --cask codex`
 
-🎨 **UI/UX Improvements:**
-- **Better Table Display**: Rebalanced column widths for clearer output
-- **Clearer Instructions**: Changed from "install" to "upgrade" in messages
+📚 **Documentation:**
+- Enhanced installation instructions with npm and homebrew options
+- Updated Prerequisites with all installation methods
 
+**Previous Release - v0.2.0**: Agent upgrade command and automated version detection
 **Previous Release - v0.1.5**: Linting fixes for clean CI/CD builds
-**Previous Release - v0.1.4**: JSON output for programmatic agent detection
 
 ## Installation
 

internal/registry/registry_test.go

@@ -144,7 +144,7 @@ func TestIsInstallable(t *testing.T) {
 	}{
 		{"Claude", true},      // npm install
 		{"Ollama", true},      // brew install (darwin) or curl script
-		{"Amp", false},        // "See https://..." instruction
+		{"Amp", true},         // npm install
 	}
 
 	for _, tt := range tests {