Add gitlawb-sidecar community skill

[DevOps21133]

Skill name

gitlawb-sidecar

Description

Adds a signed GitLawb mirror next to GitHub. Fires when the user wants to publish, backup, or prove a commit without changing origin. Never runs the gl CLI.

Why this skill

GitLawb users already hit PAT sprawl and gl alias collisions. This skill is the on-ramp that keeps GitHub as source of truth and writes a one-line GitHub Action (uses: DevOps21133/gitlawb-sidecar@main). No existing hub skill covers signed dual-remote GitLawb + GitHub.

Trust tier requested

• community (default for first-time contributors)

Checklist

• Validated locally: bun run scripts/validate-skill.ts skills/gitlawb-sidecar/ (exit 0)
• Registry rebuilt: bun run build:registry
• SKILL.md follows the standard structure (see skills/pr-review/)
• License is OSI-approved (MIT)
• No banned content

Source plugin: https://github.com/DevOps21133/gitlawb-sidecar