agent-converter

name	agent-converter
description	Converts agent definitions between Markdown (with YAML frontmatter) and TOML formats. Use when transforming agent configurations for different agent systems — MD format for rich tool restrictions, TOML format for Codex-style agents with sandbox modes.

Agent Converter

Objective

Convert agent definitions between two formats:

1. Markdown format (.md with YAML frontmatter) — Rich format with explicit tool restrictions
2. TOML format (.toml) — Simple format for Codex agents with sandbox modes

Inputs

• Source file: Path to an agent .md file (or directory of agents)
• Output format: toml (default) or md
• Output directory: Where to write converted files (default: same as source)

Commands

Convert single agent MD → TOML

python3 skills/agent-converter/scripts/convert_agent.py <input.md> [--output <dir>]

Convert all agents in directory

python3 skills/agent-converter/scripts/convert_agent.py --batch <input_dir> [--output <dir>]

Convert TOML → MD

python3 skills/agent-converter/scripts/convert_agent.py <input.toml> --to-md [--output <dir>]

Format Mapping

MD Frontmatter	TOML Field
name	(derived from filename)
description	Included in developer_instructions
tools	Mapped to sandbox_mode
Markdown body	developer_instructions

Tool → Sandbox Mode Mapping

Tools	Sandbox Mode
Read, Grep, Glob only	read-only
Any Write/Edit tools	allow-edits
No tools specified	allow-edits (default)

Sandbox Mode → Tool Mapping (reverse)

Sandbox Mode	Tools
read-only	Read, Grep, Glob
allow-edits	Read, Write, Edit, Bash, Glob, Grep

Example Conversion

Input: explorer.md

---
name: explorer
description: >
  Read-only codebase explorer.
tools:
  - Read
  - Grep
  - Glob
---

# Explorer — Read-Only Codebase Navigator

You are a read-only explorer agent...

Output: explorer.toml

sandbox_mode = "read-only"

developer_instructions = """
Role: Read-only codebase explorer.

Tools: Read, Grep, Glob

---

# Explorer — Read-Only Codebase Navigator

You are a read-only explorer agent...
"""

Workflow

1. Parse source file (MD or TOML)
2. Extract metadata and instructions
3. Map format-specific fields
4. Write output in target format
5. Report conversion summary

Error Handling

Error	Resolution
Missing frontmatter	Treat as plain markdown, use defaults
Invalid TOML	Report parse error with line number
Unknown tools	Warn and include in output as-is
File exists	Prompt user or use --force to overwrite

References

• Format specification: skills/agent-converter/references/format-spec.md
• Example agents: .agents/sub-agents/