Coding Conventions

Dual-Layer Documentation

Every non-trivial code element needs two layers:

• External comment/header — scannable description above the definition
• Internal docstring — detailed docs inside the definition

File Headers

Every source file starts with a header describing its purpose.

Python Files

#!/usr/bin/env python3
"""
Script Name
=====================================

Purpose:
    What the script does and its role in the system.

Layer: Investigate / Codify / Curate / Retrieve

Usage:
    python script.py [args]

Related:
    - related_script.py
"""

For CLI tools in plugins/, use the extended format with Usage Examples, CLI Arguments, Key Functions, and Script Dependencies sections. See references/header_templates.md for the full gold-standard template.

TypeScript/JavaScript Files

/**
 * path/to/file.js
 * ================
 *
 * Purpose:
 *   Component responsibility and role in the system.
 *
 * Key Functions/Classes:
 *   - functionName() - Brief description
 */

C#/.NET Files

// path/to/File.cs
// Purpose: Class responsibility.
// Layer: Service / Data access / API controller.
// Used by: Consuming services.

Function Documentation

Python — Google-style docstrings with type hints

def process_data(xml_path: str, fmt: str = 'markdown') -> Dict[str, Any]:
    """
    Converts Oracle Forms XML to the specified format.

    Args:
        xml_path: Absolute path to the XML file.
        fmt: Target format ('markdown', 'json').

    Returns:
        Dictionary with converted data and metadata.

    Raises:
        FileNotFoundError: If xml_path does not exist.
    """

TypeScript — JSDoc with @param, @returns, @throws

/**
 * Fetches RCC data and updates component state.
 *
 * @param rccId - Unique identifier for the RCC record
 * @returns Promise resolving to RCC data object
 * @throws {ApiError} If the API request fails
 */
async function fetchRCCData(rccId: string): Promise<RCCData> {}

C# — XML doc comments

/// <summary>
/// Retrieves RCC details by ID.
/// </summary>
/// <param name="rccId">Unique identifier.</param>
/// <returns>RCC entity with related data.</returns>
public async Task<RCC> GetRCCDetailsAsync(int rccId) {}

Naming Conventions

Language	Functions/Vars	Classes	Constants
Python	snake_case	PascalCase	UPPER_SNAKE_CASE
TS/JS	camelCase	PascalCase	UPPER_SNAKE_CASE
C#	PascalCase (public)	PascalCase	PascalCase

C# private fields use _camelCase prefix.

Code Quality Thresholds

• 50+ lines in a function → extract helpers
• 3+ nesting levels → refactor
• Comments explain why, not what
• TODO format: // TODO(#123): description

Module Organization (Python)

module/
├── __init__.py       # Exports
├── models.py         # Data models / DTOs
├── services.py       # Business logic
├── repositories.py   # Data access
├── utils.py          # Helpers
└── constants.py      # Constants and enums

Tool Inventory Integration

All Python scripts in plugins/ must be registered in plugins/tool_inventory.json.

After creating or modifying a tool:

python plugins/tool-inventory/scripts/manage_tool_inventory.py add --path "plugins/path/to/script.py"
python plugins/tool-inventory/scripts/manage_tool_inventory.py audit

The extended Python header's Purpose: section is auto-extracted for the RLM cache and tool inventory.

Pre-Commit Checklist

• File has proper header
• Script registered in plugins/tool_inventory.json
• manage_tool_inventory.py audit shows 0 untracked scripts

Manifest Schema (ADR 097)

For .agent/learning/ manifests, use the simple schema:

{
    "title": "Bundle Name",
    "description": "Purpose of the bundle.",
    "files": [
        {"path": "path/to/file.md", "note": "Brief description"}
    ]
}