Pi Tools

View and manage Pi-built extensions that have been synced to Dex.

Arguments

• $ACTION: What to do (optional, defaults to list)
  • list - Show all synced Pi extensions and their tools
  • sync - Force re-sync of Pi extensions
  • status - Show sync status and registry info
  • show [extension] - Show details for a specific extension

---

Workflow

Step 1: Check Registry

Read the Pi extensions registry at .claude/pi-extensions-registry.json.

if [ -f ".claude/pi-extensions-registry.json" ]; then
  echo "Registry found"
else
  echo "No Pi extensions synced yet"
fi

Step 2: Execute Action

If $ACTION == list or no action specified:

Display all synced extensions:

## Pi Extensions

| Extension | Tools | Commands | Last Modified |
|-----------|-------|----------|---------------|
| [name]    | [count] | [count] | [date]      |

### Tools Available

**[extension-name]:**
- `tool_name` - Description
- `tool_name_2` - Description

**[extension-name-2]:**
- ...

If $ACTION == sync:

1. Run the sync hook manually:

   node .claude/hooks/pi-extensions-sync.cjs
   

2. Report what changed:

   • New extensions added
   • Extensions updated
   • Extensions removed

If $ACTION == status:

Display sync metadata:

• Last sync timestamp
• Number of extensions
• Registry file location
• Generated skills location

If $ACTION == show [extension]:

Read the generated skill file:

cat ".claude/skills/pi-generated/pi-[extension]/SKILL.md"

Display full details:

• Description
• All tools with parameters
• All commands
• Source file location

---

Output Format

List View

## Pi Extensions Synced to Dex

**Last sync:** 2026-02-03T12:00:00Z

### dex-mcp-bridge

*Bridges Pi to Dex's MCP servers for task and calendar management*

**Tools:**
- `dex_task` - Manage tasks (create, complete, list, suggest)
- `dex_calendar` - Access calendar events (today, upcoming, list)

**Commands:**
- `/dex-tasks` - List current tasks
- `/dex-today` - Show today's events

---

Run `/pi-tools sync` to refresh from .pi/extensions/

Status View

## Pi Extensions Status

**Registry:** .claude/pi-extensions-registry.json
**Skills:** .claude/skills/pi-generated/
**Source:** .pi/extensions/

**Stats:**
- Extensions: 1
- Total tools: 2
- Total commands: 2

**Last sync:** 2026-02-03T12:00:00Z

**Sync triggers:**
- SessionStart hook (automatic)
- `/pi-tools sync` (manual)

---

Integration Notes

How Sync Works

1. SessionStart hook runs pi-extensions-sync.cjs
2. Scans .pi/extensions/*.ts for TypeScript files
3. Parses each file to extract:
   • JSDoc descriptions
   • pi.registerTool() calls
   • pi.registerCommand() calls
4. Generates skill stubs in .claude/skills/pi-generated/
5. Updates registry with metadata
6. Outputs summary to session context

Skill Naming

Pi extension skills are prefixed with pi: to distinguish from native Dex skills:

• pi:dex-mcp-bridge - MCP bridge extension
• pi:custom-tool - Custom extension

Generated skill folders use pi- prefix:

• .claude/skills/pi-generated/pi-dex-mcp-bridge/SKILL.md

When to Use Pi vs Dex

Use Pi tools when:

• Working in the Pi environment
• Need direct tool execution
• Building new extensions

Use Dex context when:

• Planning work that involves Pi capabilities
• Documenting what tools are available
• Cross-referencing with Dex knowledge

---

Edge Cases

• No .pi/extensions/ directory: Silent - Pi not configured
• Empty extensions directory: Report "No Pi extensions found"
• Parse errors: Skip malformed files, report warnings
• Deleted extensions: Clean up orphaned skill stubs