feat(skills): add int-portainer integration (Portainer container/stack monitoring)

[mt-alarcon]

Summary

• Adds int-portainer skill for managing and monitoring Portainer CE/EE container orchestration instances
• Multi-instance support via env vars — no hardcoded names; any PORTAINER_<NAME>_URL + PORTAINER_<NAME>_TOKEN pair in .env is discovered at runtime
• Follows the same skill structure and .env auto-load pattern as existing int-* skills

Configuration

# .env — one block per instance
PORTAINER_PROD_URL=https://portainer.prod.example.com
PORTAINER_PROD_TOKEN=ptr_xxxx
PORTAINER_STAGING_URL=https://portainer.staging.example.com
PORTAINER_STAGING_TOKEN=ptr_yyyy

No API keys or secrets are required at install time — credential pattern matches existing skills.

Commands

Command	Description
ping	Health-check all configured instances
health	Detailed system info (version, resources)
containers	List containers with status and image
stacks	List Docker Compose stacks
logs	Tail container logs (supports --lines)
events	Recent Docker events
deploy	Deploy/update a stack from a Compose file
stop / restart	Lifecycle operations on a container
exec	Run a command inside a container
smoke	Standard health-check exit-0+JSON (CI/heartbeat pattern)

Tests

13 unit tests covering:

• .env auto-load (populates env without overriding existing vars)
• Dynamic instance discovery from PORTAINER_<NAME>_* env vars
• cmd_logs guard rejects endpoint_id=None with clear error
• resolve_instances('all') iterates all configured instances
• smoke command always exits 0 and returns valid JSON

All tests pass with pytest .claude/skills/int-portainer/tests/ -v.

Checklist

• No hardcoded secrets or private URLs
• .env auto-load without requiring manual source
• Dynamic instance discovery — works with any instance name
• smoke command follows the standard exit-0+JSON pattern
• 13 tests passing
• MIT-compatible (uses only stdlib + urllib)

🤖 Generated with Claude Code

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