Release v4.2.0

Merge pull request obra#349 from obra/fix/opencode-issues

fix(opencode): standardize on plugins/ directory, fix symlink docs

Release v4.1.0

Breaking changes:
- OpenCode: Switched to native skills system (migration required)

Fixes:
- OpenCode: Fixed agent reset on session start (obra#226)
- OpenCode: Fixed Windows installation (obra#232)
- Claude Code: Fixed Windows hook execution for 2.1.x

Release v4.0.3: Strengthen using-superpowers for explicit skill requests

Release v4.0.2

Release v4.0.1

Release v4.0.0: Two-stage code review, debugging tools consolidation,…

… skill test infrastructure

Release v3.6.2

Release v3.6.1: Fix Windows arg forwarding

Release v3.6.0: Add Windows support for plugin hooks