# Implementation Summary: Phase 2A Foundation Tools (1M-92)

## Overview
Successfully implemented the first two Phase 2A tools for the adapter setup wizard: `config_list_adapters()` and `config_get_adapter_requirements()`.

## Implemented Tools

### 1. config_list_adapters()
**Location:** `src/mcp_ticketer/mcp/server/tools/config_tools.py` (lines 872-985)

**Functionality:**
- Lists all available adapters from `AdapterRegistry`
- Checks which adapters are configured in project config
- Identifies the default adapter
- Provides human-readable metadata for each adapter

**Response Format:**
```json
{
  "status": "completed",
  "adapters": [
    {
      "type": "linear",
      "name": "Linear",
      "configured": true,
      "is_default": true,
      "description": "Linear issue tracking"
    }
  ],
  "default_adapter": "linear",
  "total_configured": 1,
  "message": "1 adapter(s) configured"
}
```

**Key Features:**
- Sorts adapters (configured first, then alphabetically)
- Includes descriptive metadata for each adapter
- Handles missing config gracefully (returns defaults)
- Supports all registered adapters (linear, github, jira, aitrackdown, asana)

### 2. config_get_adapter_requirements()
**Location:** `src/mcp_ticketer/mcp/server/tools/config_tools.py` (lines 988-1170)

**Functionality:**
- Returns required/optional configuration fields for a specific adapter
- Includes field types, descriptions, validation patterns, and environment variables
- Based on `ConfigValidator` validation logic
- Enables Claude to guide users through credential collection

**Response Format:**
```json
{
  "status": "completed",
  "adapter": "linear",
  "requirements": {
    "api_key": {
      "type": "string",
      "required": true,
      "description": "Linear API key (get from Linear Settings > API)",
      "env_var": "LINEAR_API_KEY",
      "validation": "^lin_api_[a-zA-Z0-9]{40}$"
    },
    "team_key": {
      "type": "string",
      "required": true,
      "description": "Team key (e.g., 'ENG') OR team_id (UUID). At least one required.",
      "env_var": "LINEAR_TEAM_KEY"
    }
  },
  "total_fields": 4,
  "required_fields": ["api_key", "team_key"],
  "optional_fields": ["team_id", "workspace"]
}
```

**Key Features:**
- Comprehensive requirements for all adapters
- Validation patterns included where applicable
- Environment variable names for each field
- Clear distinction between required/optional fields
- Case-insensitive adapter names
- Helpful error messages for invalid adapters

## Test Coverage

### TestConfigListAdapters (5 tests)
**Location:** `tests/mcp/test_config_tools.py` (lines 737-921)

Tests:
1. ✅ `test_list_adapters_no_config` - No config file exists
2. ✅ `test_list_adapters_with_configured` - Some adapters configured
3. ✅ `test_list_adapters_default_marked` - Default adapter correctly marked
4. ✅ `test_list_adapters_sorting` - Configured adapters sorted first
5. ✅ `test_list_adapters_metadata` - Metadata fields present

### TestConfigGetAdapterRequirements (9 tests)
**Location:** `tests/mcp/test_config_tools.py` (lines 924-1110)

Tests:
1. ✅ `test_get_linear_requirements` - Linear adapter requirements
2. ✅ `test_get_github_requirements` - GitHub adapter requirements
3. ✅ `test_get_jira_requirements` - JIRA adapter requirements
4. ✅ `test_get_aitrackdown_requirements` - AITrackdown requirements
5. ✅ `test_get_invalid_adapter_requirements` - Invalid adapter error
6. ✅ `test_get_adapter_requirements_case_insensitive` - Case handling
7. ✅ `test_requirements_include_validation_patterns` - Validation patterns present
8. ✅ `test_requirements_include_descriptions` - All fields have descriptions
9. ✅ `test_requirements_total_fields_accurate` - Field counts accurate

**Total: 14 tests, all passing**

## Implementation Notes

### Code Quality
- Follows existing patterns in `config_tools.py`
- Comprehensive docstrings with examples
- Proper error handling for all edge cases
- Type hints included
- No code duplication

### Adapter Support
Both tools support all registered adapters:
- Linear (api_key, team_key/team_id, workspace)
- GitHub (token, owner, repo)
- JIRA (server, email, api_token, project_key)
- AITrackdown (base_path - optional)
- Asana (api_key, workspace)

### Validation Patterns
Included regex validation where applicable:
- Linear API key: `^lin_api_[a-zA-Z0-9]{40}$`
- Linear team_id: UUID format
- JIRA server: `^https?://`
- JIRA email: Email format

### Environment Variables
Each field includes the corresponding environment variable name:
- `LINEAR_API_KEY`, `LINEAR_TEAM_KEY`, `LINEAR_TEAM_ID`
- `GITHUB_TOKEN`, `GITHUB_OWNER`, `GITHUB_REPO`
- `JIRA_SERVER`, `JIRA_EMAIL`, `JIRA_API_TOKEN`
- `AITRACKDOWN_BASE_PATH`
- `ASANA_API_KEY`, `ASANA_WORKSPACE`

## Testing Results
```
14 passed in 3.07s
```

All tests pass with comprehensive coverage of:
- Happy paths (valid inputs)
- Error cases (invalid adapters)
- Edge cases (empty configs, case sensitivity)
- Data validation (field presence, types)
- Response format verification

## Next Steps (Phase 2A Remaining)
These foundation tools enable the next phase:
1. `config_setup_wizard()` - Interactive setup flow using these tools
2. `config_save_adapter()` - Save adapter credentials
3. Additional validation and testing tools

## Files Modified
1. `/src/mcp_ticketer/mcp/server/tools/config_tools.py` - Added 2 new tools
2. `/tests/mcp/test_config_tools.py` - Added 14 comprehensive tests

## LOC Impact
- **Net LOC Added:** ~420 lines
  - Implementation: ~300 lines (2 tools + docstrings)
  - Tests: ~375 lines (14 test methods)
  - Net: ~675 total lines

**Status:** ✅ Complete and production-ready
