# Context - gocp Project

## CRITICAL INSTRUCTIONS - MUST FOLLOW

1. **Simple commits**: One-line commit messages ONLY. NEVER add "Generated by Claude" footers, emojis, or any multi-line messages. Just describe what changed in one line.

2. **Minimal comments**: Only add comments when absolutely critical for disambiguation

3. **Never use `go build`**: Always use `go run` instead of `go build` for testing Go programs

4. **Never change directories**: Never change directories with `cd` - always use absolute paths instead

5. **Error handling**: Always propagate errors with proper messages, never silently handle errors

## Project Overview
gocp is a Go MCP (Model Context Protocol) server that provides tools for building and executing Go code. It uses the go-mcp library to implement the MCP protocol.

## Key Files
- `main.go`: MCP server implementation with tools and handlers
- `ast.go`: Go AST parsing and code analysis functionality
- `go.mod`: Module definition with go-mcp dependency

## Tool Details

### build_and_run_go
Executes Go code using `go run`
- Parameters:
  - `code` (required): Go source code to execute
  - `timeout` (optional): Timeout in seconds (default: 30)
- Returns JSON with:
  - `stdout`: Standard output
  - `stderr`: Standard error
  - `exit_code`: Process exit code
  - `error`: Error message if any
- Creates temporary directories with `gocp-*` prefix

### find_symbols
Find all functions, types, interfaces, constants, and variables by name/pattern
- Parameters:
  - `dir` (optional): Directory to search (default: current directory)
  - `pattern` (optional): Symbol name pattern to search for (case-insensitive substring match)
- Returns JSON array of symbols with:
  - `name`: Symbol name
  - `type`: Symbol type (function, struct, interface, constant, variable)
  - `package`: Package name
  - `file`: File path
  - `line`: Line number
  - `column`: Column number
  - `exported`: Whether the symbol is exported

### get_type_info
Get detailed information about a type including fields, methods, and embedded types
- Parameters:
  - `dir` (optional): Directory to search (default: current directory)
  - `type` (required): Type name to get information for
- Returns JSON with:
  - `name`: Type name
  - `package`: Package name
  - `file`: File path
  - `line`: Line number
  - `kind`: Type kind (struct, interface, alias, other)
  - `fields`: Array of field information (for structs)
  - `methods`: Array of methods
  - `embedded`: Array of embedded type names
  - `interface`: Array of interface methods (for interfaces)
  - `underlying`: Underlying type (for aliases)

### find_references
Find all references to a symbol (function calls, type usage, etc.)
- Parameters:
  - `dir` (optional): Directory to search (default: current directory)
  - `symbol` (required): Symbol name to find references for
- Returns JSON array of references with:
  - `file`: File path
  - `line`: Line number
  - `column`: Column number
  - `context`: Code context around the reference
  - `kind`: Reference kind (identifier, selector)

### list_packages
List all Go packages in directory tree
- Parameters:
  - `dir` (optional): Directory to search (default: current directory)
- Returns JSON array of packages with:
  - `import_path`: Import path relative to search directory
  - `name`: Package name
  - `dir`: Directory path
  - `go_files`: List of Go source files
  - `imports`: List of imported packages

### go_run
Execute go run command with specified path and optional flags
- Parameters:
  - `path` (required): Path to Go file or package to run
  - `flags` (optional): Optional flags for go run (space-separated)
  - `timeout` (optional): Timeout in seconds (default: 30)
- Returns JSON with:
  - `stdout`: Standard output from go run
  - `stderr`: Standard error from go run
  - `exit_code`: Process exit code
  - `error`: Error message if any
  - `command`: The full command that was executed
  - `work_dir`: Working directory where command was run

### go_test
Execute go test command with specified path and optional flags
- Parameters:
  - `path` (required): Path to Go package or directory to test
  - `flags` (optional): Optional flags for go test (space-separated, e.g., '-v -cover -race')
  - `timeout` (optional): Timeout in seconds (default: 60)
- Returns JSON with:
  - `stdout`: Standard output from go test
  - `stderr`: Standard error from go test
  - `exit_code`: Process exit code
  - `error`: Error message if any
  - `command`: The full command that was executed
  - `work_dir`: Working directory where command was run
  - `passed`: Boolean indicating if tests passed
  - `test_count`: Number of tests found (if detectable)