fix: Worktree scripts use $(pwd) for project root

Scripts now correctly determine project root from current working
directory instead of calculating relative to script location.
This fixes the issue when scripts are called via ${CLAUDE_PLUGIN_ROOT}.

Also adds CLAUDE.md and CHANGELOG.md for development guidance.

Bumps version to 1.0.3.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

CHANGELOG.md

@@ -0,0 +1,30 @@
+# Changelog
+
+All notable changes to Auto-Build plugin.
+
+## [1.0.3] - 2024-12-22
+
+### Fixed
+- Worktree scripts now use `$(pwd)` for project root instead of calculating from script location
+- Scripts work correctly when called via `${CLAUDE_PLUGIN_ROOT}/scripts/`
+
+## [1.0.2] - 2024-12-21
+
+### Added
+- CLAUDE.md file for development guidance
+
+## [1.0.1] - 2024-12-21
+
+### Fixed
+- hooks.json format corrected (use object instead of array)
+
+## [1.0.0] - 2024-12-20
+
+### Added
+- Initial release
+- 8 commands: spec, build, worktree, qa-review, memory-save, memory-search, status, help
+- 5 agents: spec-writer, planner, coder, qa-reviewer, qa-fixer
+- Git worktree isolation support
+- Bidirectional memory system (JSON + Markdown)
+- CLAUDE.md integration with context-aware agents
+- Post-install hook for automatic setup