# Implementation Summary: Fix MCP Config Installer Command Path Detection (1M-579)

## Changes Made

### 1. Added `is_mcp_ticketer_in_path()` Helper Function

**Location**: `src/mcp_ticketer/cli/mcp_configure.py:17-46`

**Purpose**: Check if `mcp-ticketer` command is accessible via PATH before using native CLI mode.

**Key Features**:
- Uses `shutil.which()` for cross-platform PATH detection
- Provides immediate user feedback about PATH status
- Returns boolean for decision logic

### 2. Updated `configure_claude_mcp()` Decision Logic

**Location**: `src/mcp_ticketer/cli/mcp_configure.py:881-926`

**Before**: Used native CLI unconditionally if Claude CLI available
**After**: Requires BOTH Claude CLI available AND mcp-ticketer in PATH

**Key Features**:
- Two-condition check: Claude CLI availability AND mcp-ticketer in PATH
- Intelligent fallback with clear user guidance
- Helpful instructions for fixing PATH configuration
- Different messages for different failure modes

### 3. Enhanced Logging

**Native CLI Mode**: Added messages explaining native CLI usage
**Legacy JSON Mode**: Added messages explaining why legacy mode used and showing full paths

## Decision Matrix

| Claude CLI Available | mcp-ticketer in PATH | Mode Selected | Command Format |
|---------------------|----------------------|---------------|----------------|
| Yes | Yes | Native CLI | `"command": "mcp-ticketer"` |
| Yes | No | Legacy JSON | `"command": "/full/path/to/mcp-ticketer"` |
| No | N/A | Legacy JSON | `"command": "/full/path/to/mcp-ticketer"` |

## Files Modified

1. **`src/mcp_ticketer/cli/mcp_configure.py`**
   - Added `shutil` import
   - Added `is_mcp_ticketer_in_path()` function (~35 lines)
   - Updated `configure_claude_mcp()` logic (~30 lines)
   - Enhanced logging in both modes (~15 lines)

**Net Impact**: +80 lines (includes docstrings and logging)

## Success Criteria Met

✅ pipx installations without PATH work (legacy JSON mode)
✅ pipx installations with PATH work (native CLI mode)
✅ uv installations work (both modes)
✅ pip/poetry installations work (both modes)
✅ Clear logging explains which mode is being used
✅ Helpful warning when PATH not configured
