What is claude-to-codex-migrator?

A migration tool for converting Claude skills, plugins, packages, archives, or documentation into Codex Skills or plugins.

Use it to inspect source packages, decide whether each should become a Skill or plugin, transform files, and validate the result.

It helps avoid losing files, behavior, or unclear components when moving work between assistant platforms.

claude-to-codex-migrator — Skill for Claude Code and Codex by ahmedawa

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent

npx skills add ahmedawan-oracle/claude-code-plugins --skill claude-to-codex-migrator

Clone the repo

git clone --depth 1 https://github.com/ahmedawan-oracle/claude-code-plugins

Made for: Claude Code, Codex.

Or install claude-to-codex-migrator, the plugin that ships this one along with the rest of its 1 skill.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/skills/ahmedawan-oracle/claude-code-plugins/claude-to-codex-migrator/github.svg)](https://agentmods.dev/skills/ahmedawan-oracle/claude-code-plugins/claude-to-codex-migrator)

Your own site

<a href="https://agentmods.dev/skills/ahmedawan-oracle/claude-code-plugins/claude-to-codex-migrator"><img src="https://agentmods.dev/badge/skills/ahmedawan-oracle/claude-code-plugins/claude-to-codex-migrator/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/skills/ahmedawan-oracle/claude-code-plugins/claude-to-codex-migrator"><img src="https://agentmods.dev/badge/skills/ahmedawan-oracle/claude-code-plugins/claude-to-codex-migrator.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 85 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 1,402 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

Model	Per session	Once invoked
Fable 5.1	$0.00085	$0.01402
Opus 5	$0.00043	$0.00701
Sonnet 5	$0.00017	$0.00280
Haiku 4.5	$0.00009	$0.00140

Measured 8d ago against content hash c9d13b32a39d, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

claude-to-codex-migrator scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 8d ago.

The scan reads SKILL.md. This mod also ships 15 executable files (scripts/discover_installed.py, scripts/inventory_source.py, scripts/migrate_to_codex/__init__.py, …), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

claude-code-plugins/claude-to-codex-migrator/skills/claude-to-codex-migrator/SKILL.md · 139 lines

How it starts

The opening of the file, as written. The whole thing — 139 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Claude to Codex Migrator

Migrate source packages through a clean-room, report-backed workflow. Use the bundled scripts for deterministic staging, inventory, transformation, cleanup scanning, and validation. Apply judgment only where the reports identify semantic or unsupported work.

Resolve <skill-root> to the directory containing this SKILL.md. Invoke every bundled script by its path under <skill-root>/scripts; do not assume the user's current working directory is the installed Skill directory.

Core rules

Preserve behavior and intent before optimizing structure.
Classify every source file as keep-as-is, rename, rewrite, split-into-reference, delete, or manual.
Build as a Skill for instructions, prompts, documentation, and reusable workflows.
Build as a plugin for MCP, apps, authenticated runtime behavior, distributable hooks, or mixed integration bundles.
Keep reports and unresolved source snapshots outside the distributable package.
Never silently drop an unknown component.
Finish only after the package passes structural validation and a filename/content cleanup scan.

Workflow

1. Normalize the input

Accept a folder, ZIP, single file, or stdin bundle directly. For pasted multi-file content, repository trees, or documentation-only descriptions, materialize a JSON stdin bundle before migration.

When the user names an installed source package but does not provide its path, discover or resolve it first:

python3 <skill-root>/scripts/discover_installed.py
python3 <skill-root>/scripts/discover_installed.py --resolve <plugin-id>

Read input-contract.md when the input is not a normal source folder.

Inventory without writing output:

python3 <skill-root>/scripts/inventory_source.py <source>

For stdin, pass either plain text or a JSON object whose files field maps relative paths to string contents.

2. Inspect and plan

Review the inventory for hidden files, runtime dependencies, source-specific references, unknown components, and warnings. Read component-mapping.md when commands, agents, hooks, MCP, apps, settings, LSP, or unknown files exist.

Read the full file on GitHub · 139 lines

Files

What ships with it

21 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

8d ago First seen · 139 lines · 85 tokens per session scan A c9d13b32a39d

Subscribe to this mod's changes

claude-to-codex-migrator is a skill published in the GitHub repository ahmedawan-oracle/claude-code-plugins (2 stars, last pushed 1mo ago), licensed MIT. It adds 85 tokens to every session and 1,402 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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