AGENTS.md Manager

Create and maintain AGENTS.md files and Codex CLI configuration for any project.

Core Workflow

Determine the mode:

Mode When Script

Create New project needs AGENTS.md scripts/analyze_project.py then write

Refresh Existing AGENTS.md needs audit scripts/validate_agents_md.py

Convert Migrate from CLAUDE.md scripts/convert_claude_to_agents.py

Config Generate config.toml scripts/generate_config_toml.py

Rules Create .rules files See references/starlark-rules-spec.md

Skills Scaffold .agents/skills/ scripts/scaffold_codex_skill.py

1. Project Analysis

Run analysis to detect stack, existing config, and gaps:

python3 ~/.claude/skills/agents-md-manager/scripts/analyze_project.py [project_path]

Output: JSON report with tech stack, commands, directory structure, and Codex artifact inventory (AGENTS.md, config.toml, .rules, .agents/skills/, CLAUDE.md conversion candidates).

2. AGENTS.md Generation

Apply the WHAT/WHY/HOW framework in plain markdown only—no @import syntax, no YAML frontmatter.

Recommended Sections

Project Name

Brief description.

Commands

• Dev: pnpm dev
• Test: pnpm test
• Build: pnpm build
• Lint: pnpm lint

Structure

• /src — Application source
• /tests — Test suites

Conventions

• [Critical convention 1]
• [Critical convention 2]

Boundaries

• Always: Run tests before committing
• Ask: Before adding production dependencies
• Never: Modify migration files directly

Troubleshooting

• [Common issue and fix]

Constraints

• Target under 200 lines per file, under 100 for nested subdirectory files

• Respect 32 KiB limit (project_doc_max_bytes )

• Plain markdown only—no @import , no YAML frontmatter

• Include a "Boundaries" section (Always/Ask/Never) for agent guardrails

• See references/templates.md for project-type-specific templates

• See references/agents-md-spec.md for discovery and concatenation rules

3. CLAUDE.md Conversion

Convert existing CLAUDE.md to AGENTS.md format:

python3 ~/.claude/skills/agents-md-manager/scripts/convert_claude_to_agents.py <claude_md_path> [output_path]

Outputs AGENTS.md plus conversion_report.json listing transformations and manual review items.

Key transformations: @import inlined or nested; hooks become .rules suggestions; skill invocations become prose; Claude-specific commands stripped.

See references/conversion-mapping.md for the complete field-by-field mapping.

4. Config Generation

Generate ~/.codex/config.toml (global) or .codex/config.toml (project-scoped):

python3 ~/.claude/skills/agents-md-manager/scripts/generate_config_toml.py [--global | --project <path>] [--model MODEL] [--sandbox MODE]

Covers: model, reasoning effort, personality, sandbox mode, MCP servers, profiles, trusted projects, writable roots.

See references/config-toml-reference.md for the complete field reference.

5. Rules Files

Create .rules files in Starlark for command approval. Location: ~/.codex/rules/ (global) or .codex/rules/ (project). Rules files are authored manually—no generation script exists for this format. All .rules files in the directory are loaded and merged.

Common patterns:

• Allow package manager commands (npm , pip , cargo )

• Block destructive operations (rm -rf , git push --force )

• Prompt for review on sensitive commands (git commit , gh pr create )

See references/starlark-rules-spec.md for syntax and examples.

6. Codex Skills

Scaffold .agents/skills/<name>/ in Codex format (different from Claude .claude/skills/ ):

python3 ~/.claude/skills/agents-md-manager/scripts/scaffold_codex_skill.py <name> [--path <dir>]

Creates SKILL.md with name

• description frontmatter (both required for Codex), plus agents/openai.yaml for UI metadata.

See references/codex-skills-format.md for format differences from Claude skills.

7. Audit Checklist

When refreshing existing AGENTS.md, validate:

• Under 32 KiB? (project_doc_max_bytes limit)

• No @import syntax? (not supported in AGENTS.md)

• No YAML frontmatter? (not used in AGENTS.md)

• All documented commands verified against project config?

• Directory references match actual structure?

• No secrets or credentials?

• Nested hierarchy consistent with root?

• No AGENTS.override.md conflicts?

• Under 200 lines? (warn >200, error >400)

Run automated audit:

python3 ~/.claude/skills/agents-md-manager/scripts/validate_agents_md.py [project_path]

8. Nested AGENTS.md (Monorepos)

For monorepos, place AGENTS.md at multiple levels:

/AGENTS.md # Repo-wide conventions /services/ payments/ AGENTS.override.md # Payments-specific overrides search/ AGENTS.md # Search service conventions

• One file per directory maximum

• Codex concatenates root to CWD (closer-to-CWD appears later, overrides earlier)

• AGENTS.override.md takes precedence over AGENTS.md in the same directory

• Keep each nested file focused and under 100 lines

Integration Notes

• codex-orchestrator: This skill creates config files; codex-orchestrator executes subagents with them

• claude-md-manager: Sister skill for Claude Code's CLAUDE.md; use conversion mode to bridge

• For subagent profile management, use codex-orchestrator

Reference Documentation

File Contents

references/agents-md-spec.md

AGENTS.md discovery, concatenation, override, size limits, cross-agent compatibility

references/config-toml-reference.md

Complete config.toml field reference

references/starlark-rules-spec.md

.rules file syntax, prefix_rule(), decision types

references/codex-skills-format.md

.agents/skills/ format, openai.yaml, Claude skill differences

references/conversion-mapping.md

CLAUDE.md to AGENTS.md field-by-field mapping

references/templates.md

AGENTS.md templates by project type