diff --git a/.claude-plugin/marketplace.json b/.claude-plugin/marketplace.json
index 2b5e2fb..99791c2 100644
--- a/.claude-plugin/marketplace.json
+++ b/.claude-plugin/marketplace.json
@@ -11,7 +11,7 @@
       "name": "ab",
       "source": "./plugin",
       "description": "Spec-driven build orchestration with git worktree isolation and session memory",
-      "version": "1.0.2",
+      "version": "1.0.3",
       "keywords": ["build", "spec", "automation", "worktree", "qa"]
     }
   ]
diff --git a/CHANGELOG.md b/CHANGELOG.md
new file mode 100644
index 0000000..d43f7af
--- /dev/null
+++ b/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
diff --git a/CLAUDE.md b/CLAUDE.md
new file mode 100644
index 0000000..51a0143
--- /dev/null
+++ b/CLAUDE.md
@@ -0,0 +1,97 @@
+# CLAUDE.md
+
+This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
+
+## Project Overview
+
+Auto-Build is a Claude Code plugin that provides spec-driven build orchestration with autonomous agents. It enables structured feature development through 5 specialized agents, git worktree isolation, and persistent cross-session memory.
+
+## Repository Structure
+
+This is a **plugin repository** with two levels:
+- **Root level**: Marketplace configuration (`.claude-plugin/marketplace.json`)
+- **`plugin/` directory**: The actual plugin that gets installed
+
+```
+auto-build-plugin/
+├── .claude-plugin/marketplace.json   # Marketplace catalog
+├── plugin/                           # Plugin source (copied on install)
+│   ├── .claude-plugin/plugin.json    # Plugin manifest (prefix: "ab")
+│   ├── commands/                     # 8 slash commands (/ab:*)
+│   ├── agents/                       # 5 specialized agents
+│   ├── hooks/hooks.json              # Lifecycle hooks config
+│   ├── hooks/post-install.sh         # Runs after plugin install
+│   ├── scripts/                      # Bash scripts for worktree ops
+│   ├── rules/                        # Auto-build patterns (copied to .claude/rules/)
+│   └── templates/                    # Templates for CLAUDE.md, specs, plans
+└── README.md                         # User-facing documentation
+```
+
+## Key Architecture Concepts
+
+### Plugin Installation Flow
+1. User runs `/plugin install ab@roa2web-tools`
+2. Plugin is copied to Claude Code cache at `${CLAUDE_PLUGIN_ROOT}`
+3. `post-install.sh` hook executes and creates:
+   - `.auto-build-data/` directory structure
+   - `.claude/rules/auto-build-patterns.md`
+   - `.claude/rules/auto-build-memory.md`
+   - `CLAUDE.md` (if missing)
+
+### Script Path Resolution
+Scripts in `plugin/scripts/` are called via `${CLAUDE_PLUGIN_ROOT}/scripts/` but operate on the **current working directory** (user's project). Scripts must use `$(pwd)` for project root, not relative paths from script location.
+
+### Memory System (Bidirectional)
+- **JSON files** (`.auto-build-data/memory/*.json`): Searchable via `/ab:memory-search`
+- **Markdown** (`.claude/rules/auto-build-memory.md`): Auto-loaded by Claude Code
+
+### Agent Context Awareness
+`spec-writer` and `planner` agents read CLAUDE.md and auto-build-memory.md to respect project conventions.
+
+## Commands Reference
+
+| Command | Implementation |
+|---------|---------------|
+| `/ab:spec <name>` | `commands/spec.md` → launches `agents/spec-writer.md` |
+| `/ab:build <name>` | `commands/build.md` → launches `agents/planner.md` then `agents/coder.md` |
+| `/ab:qa-review` | `commands/qa-review.md` → loops `agents/qa-reviewer.md` + `agents/qa-fixer.md` |
+| `/ab:worktree <action>` | `commands/worktree.md` → calls `scripts/worktree-*.sh` |
+| `/ab:memory-save` | `commands/memory-save.md` → saves to JSON + syncs to markdown |
+| `/ab:memory-search` | `commands/memory-search.md` → searches JSON files |
+| `/ab:status` | `commands/status.md` |
+| `/ab:help` | `commands/help.md` |
+
+## Development Guidelines
+
+### Modifying Scripts
+When editing `plugin/scripts/*.sh`:
+- Use `PROJECT_ROOT="$(pwd)"` - never calculate from `BASH_SOURCE`
+- Scripts execute from plugin cache but operate on user's project
+- Reference plugin files via relative paths from script location
+
+### Adding Commands
+Create `.md` file in `plugin/commands/` with frontmatter:
+```yaml
+---
+description: Short description
+argument-hint: <required> [optional]
+---
+```
+
+### Adding Agents
+Create `.md` file in `plugin/agents/` with frontmatter:
+```yaml
+---
+name: agent-name
+description: What it does
+model: sonnet|opus|haiku
+color: blue|green|red
+---
+```
+
+### Version Updates
+**IMPORTANT**: When making any changes to the plugin, bump the version in BOTH files so users can update:
+- `.claude-plugin/marketplace.json` → `plugins[0].version`
+- `plugin/.claude-plugin/plugin.json` → `version`
+
+Also update `CHANGELOG.md` with the changes.
diff --git a/plugin/.claude-plugin/plugin.json b/plugin/.claude-plugin/plugin.json
index 2093fa7..bd6cbac 100644
--- a/plugin/.claude-plugin/plugin.json
+++ b/plugin/.claude-plugin/plugin.json
@@ -1,7 +1,7 @@
 {
   "name": "ab",
   "description": "Auto-Build: Spec-driven build orchestration with worktree isolation and session memory",
-  "version": "1.0.2",
+  "version": "1.0.3",
   "author": {
     "name": "ROA2WEB Team"
   }
diff --git a/plugin/scripts/worktree-cleanup.sh b/plugin/scripts/worktree-cleanup.sh
index b24d15b..d9db126 100644
--- a/plugin/scripts/worktree-cleanup.sh
+++ b/plugin/scripts/worktree-cleanup.sh
@@ -7,9 +7,8 @@ set -e
 
 FEATURE_NAME="$1"
 
-# Get project root (parent of .auto-build)
-SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
-PROJECT_ROOT="$(cd "$SCRIPT_DIR/../.." && pwd)"
+# Get project root from current working directory (where Claude Code is running)
+PROJECT_ROOT="$(pwd)"
 PROJECT_NAME=$(basename "$PROJECT_ROOT")
 WORKTREES_DIR="$(dirname "$PROJECT_ROOT")/ab-worktrees"
 
@@ -104,5 +103,5 @@ else
 
     echo ""
     echo "To cleanup a specific worktree:"
-    echo "  bash .auto-build/scripts/worktree-cleanup.sh <feature-name>"
+    echo "  /ab:worktree cleanup <feature-name>"
 fi
diff --git a/plugin/scripts/worktree-create.sh b/plugin/scripts/worktree-create.sh
index b76cd62..031a992 100644
--- a/plugin/scripts/worktree-create.sh
+++ b/plugin/scripts/worktree-create.sh
@@ -12,9 +12,9 @@ if [ -z "$FEATURE_NAME" ]; then
     exit 1
 fi
 
-# Get project root (parent of .auto-build)
-SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
-PROJECT_ROOT="$(cd "$SCRIPT_DIR/../.." && pwd)"
+# Get project root from current working directory (where Claude Code is running)
+# Note: This script is called from ${CLAUDE_PLUGIN_ROOT}/scripts/ but operates on the project
+PROJECT_ROOT="$(pwd)"
 PROJECT_NAME=$(basename "$PROJECT_ROOT")
 
 # Define paths
diff --git a/plugin/scripts/worktree-list.sh b/plugin/scripts/worktree-list.sh
index c7d0c4a..d61a5ae 100644
--- a/plugin/scripts/worktree-list.sh
+++ b/plugin/scripts/worktree-list.sh
@@ -4,9 +4,8 @@
 
 set -e
 
-# Get project root (parent of .auto-build)
-SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
-PROJECT_ROOT="$(cd "$SCRIPT_DIR/../.." && pwd)"
+# Get project root from current working directory (where Claude Code is running)
+PROJECT_ROOT="$(pwd)"
 
 echo "========================================"
 echo "  Git Worktrees"
diff --git a/plugin/scripts/worktree-switch.sh b/plugin/scripts/worktree-switch.sh
index 16bdb1b..b8f4981 100644
--- a/plugin/scripts/worktree-switch.sh
+++ b/plugin/scripts/worktree-switch.sh
@@ -6,9 +6,8 @@ set -e
 
 FEATURE_NAME="$1"
 
-# Get project root (parent of .auto-build)
-SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
-PROJECT_ROOT="$(cd "$SCRIPT_DIR/../.." && pwd)"
+# Get project root from current working directory (where Claude Code is running)
+PROJECT_ROOT="$(pwd)"
 PROJECT_NAME=$(basename "$PROJECT_ROOT")
 WORKTREES_DIR="$(dirname "$PROJECT_ROOT")/ab-worktrees"