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.
npx skills add bish-x/bx-dev-skill --skill migrate-to-codexgit clone --depth 1 https://github.com/bish-x/bx-dev-skillWrote 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.
[](https://agentmods.dev/skills/bish-x/bx-dev-skill/migrate-to-codex)<a href="https://agentmods.dev/skills/bish-x/bx-dev-skill/migrate-to-codex"><img src="https://agentmods.dev/badge/skills/bish-x/bx-dev-skill/migrate-to-codex/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.
<a href="https://agentmods.dev/skills/bish-x/bx-dev-skill/migrate-to-codex"><img src="https://agentmods.dev/badge/skills/bish-x/bx-dev-skill/migrate-to-codex.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00028 | $0.01915 |
| Opus 5 | $0.00014 | $0.00958 |
| Sonnet 5 | $0.00006 | $0.00383 |
| Haiku 4.5 | $0.00003 | $0.00192 |
Grade C, and why
migrate-to-codex scanned grade C with 2 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 7d ago.
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.
Reads agent configuration directoriesmediumAgent snooping
.claude/, .codex/, .gemini/ hold keys, settings and other credentials a mod has no legitimate need for.
Keep going until the selected migration is completely done: run the migrator, inspect the report, fix migrated Codex instructions/skills/agents/MCP config, and re-run checks without stopping to ask for confirmation of th Reads MCP configurationmediumAgent snooping
mcp.json carries server URLs and auth tokens; reading it lets a mod discover and abuse other integrations.
Keep going until the selected migration is completely done: run the migrator, inspect the report, fix migrated Codex instructions/skills/agents/MCP config, and re-run checks without stopping to ask for confirmation of th The source is not reproduced here
No licence file
A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.
What ships with it
18 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.
- agents/openai.yaml 144 B
- LICENSE.txt 11 KB
- references/differences.md 13 KB
- scripts/cli.py 29 KB runs code
- scripts/migrate-to-codex.py 208 B runs code
- scripts/migrate/__init__.py 285 B runs code
- scripts/migrate/agents.py 9.8 KB runs code
- scripts/migrate/codex_config.py 3.9 KB runs code
- scripts/migrate/common.py 11 KB runs code
- scripts/migrate/hooks.py 8.0 KB runs code
- scripts/migrate/instructions.py 2.4 KB runs code
- scripts/migrate/mcps.py 6.9 KB runs code
- scripts/migrate/plugins.py 660 B runs code
- scripts/migrate/settings.py 1.0 KB runs code
- scripts/migrate/skills.py 12 KB runs code
- scripts/utils/__init__.py 35 B runs code
- scripts/utils/scan.py 4.3 KB runs code
- scripts/utils/util.py 9.2 KB runs code
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.
- 7d ago First seen · 115 lines · 28 tokens per session scan C 145b7fe48360
migrate-to-codex is a skill published in the GitHub repository bish-x/bx-dev-skill (23 stars, last pushed 3mo ago), with no licence file. It adds 28 tokens to every session and 1,915 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it C with 2 findings (reads agent configuration directories, reads mcp configuration). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.
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