Plugins and Pi extensions for spec-driven development, design work, and agent ergonomics.
| Plugin or extension | Claude Code | Codex | Pi |
|---|---|---|---|
| ACStack | ✓ | ✓ | ✓ |
| open-designer | ✓ | ✓ | ✓ |
| agentic-retro | ✓ | ✓ | ✓ |
| sticky-prompt-line | ✗ | ✗ | ✓ |
The table shows host support. Each host uses its own install route:
- Claude Code and Codex install plugin packages from this marketplace
- Pi installs native Pi packages from npm with
pi install npm:<package>, not the marketplace plugin packages sticky-prompt-lineis a Pi extension onlyopen-designeralso shipsopen-designer-viewerfor local browser previews
Install the marketplace once:
/plugin marketplace add ac8318740/ac-agentic-coding
Install any Claude Code plugin from this marketplace:
/plugin install acstack@ac-agentic-coding
/plugin install open-designer@ac-agentic-coding
/plugin install agentic-retro@ac-agentic-coding
Claude Code cannot install sticky-prompt-line.
Install the marketplace once:
codex plugin marketplace add ac8318740/ac-agentic-coding
Install any Codex plugin from this marketplace:
codex plugin add acstack@ac-agentic-coding
codex plugin add open-designer@ac-agentic-coding
codex plugin add agentic-retro@ac-agentic-coding
Codex cannot install sticky-prompt-line.
Codex prompts once to trust a plugin's hooks. ACStack's hook injects its orchestrator instructions and installs its subagent definitions. Declining the prompt leaves ACStack mostly inactive.
Install the Pi packages you want from npm:
pi install npm:@tintinweb/pi-subagents
pi install npm:acstack
pi install npm:open-designer-viewer
pi install npm:agentic-retro
pi install npm:sticky-prompt-line
@tintinweb/pi-subagents provides the subagent runtime for ACStack. The other packages do not need it.
The native agentic-retro package includes its CLI. Do not also run the legacy agentic-retro install-pi installer.
The open-designer-viewer package includes the viewer and native Pi workflows. Restart Pi or run /reload, then start with /open-designer:design-system.
Each plugin lives in its own repository. Follow its guide for setup and requirements:
The marketplace manifest references each plugin by URL.