# Add Sub

> Subscribe to a skill event. Adds a subscription that injects context before or after a skill runs. Supports optional conditions at both insert-level (inherited by all subscriptions) and subscription-level (AND-stacked). Conditions include fileExists, gitBranch, envSet, envEquals, fileContains (with optional regex).

- Skill: `composiohq/add-sub` (Agent Skill)
- Install (CLI): `npx skillmds@latest add composiohq/add-sub`
- Raw SKILL.md: https://api.skillmd.com/api/skills/composiohq/add-sub/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: Composio HQ (https://skillmd.com/u/composiohq)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/composiohq/add-sub

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# Subscribe to Skill Event

This skill delegates to the `/skill-bus:add-sub` command for the full interactive process.

Run the command directly: `/skill-bus:add-sub`