codex-first SKILL.md skillA

codex-first from steipete/agent-scripts is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.

mdr add steipete/agent-scripts/codex-first@git:20261018.6232f9b

Pins git:20261018.6232f9b in mdr.lock. Pin the fingerprint instead.

Audit grade

A, 17 of 17 checks passed

Kind

SKILL.md skill

Repository

steipete/agent-scripts

Path

skills/codex-first/SKILL.md

Versions recorded

21

Latest version

git:20261018.6232f9b, committed Oct 18, 2026

First version recorded

Aug 20, 2026

Size

16,116 bytes

Repository stars

7,386

License

MIT

Claude Code work routing: delegate hands-on work to Codex under the native-Claude model gate. Keep specification, judgment, and verification in Claude; prefer isolated Codex-backed autoreview.

Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.

What the file says

# Codex First

## Launch flags — read first, copy verbatim

Default every Codex worker, **fresh or resumed**, to **GPT-6.1 Sol, high
reasoning, Ultrafast service tier** (`service_tier="ultrafast"`). Pass all three
settings unless the user requests an override.

```bash
# fresh
codex exec --yolo -C "$WT" \
  -m gpt-6.1-sol -c 'model_reasoning_effort="high"' \
  --enable fast_mode -c 'service_tier="ultrafast"' \
  -c 'model_auto_compact_token_limit=260000' \
  -o "$OUT" - < "$ORDER"
# resume: pass the same flags again; resume does not inherit them
codex exec resume "$SID" --dangerously-bypass-approvals-and-sandbox \
  -m gpt-6.1-sol -c 'model_reasoning_effort="high"' \
  --enable fast_mode -c 'service_tier="ultrafast"' \
  -c 'model_auto_compact_token_limit=260000' -o "$OUT" -
```

- Ultrafast has a context ceiling (measured 2026-10-13, direct Responses probes, gpt-6.1-sol +
  gpt-6-astra): served `ultrafast` up to ~282k prompt tokens, flaky at 288–294k, `fast` at
  ≥300k — silently, HTTP 200. Config default compacts at 400k, so long workers drift to Fast;
  the 260k compact cap keeps them Ultrafast. Rollouts record only the requested tier; prove the
…

Read the whole file at its exact version.

How to install

mdr add steipete/agent-scripts/codex-first@sha256:1d6f61ac9a966969

[![mdr](https://markdownregistry.com/badge/art_iibpsjiytnokma2g.svg)](https://markdownregistry.com/a/art_iibpsjiytnokma2g)

Versions

The registry has recorded 21 versions of this file, between Aug 20, 2026 and Oct 18, 2026, about one every 3 days. Its first recorded version is graded B and its latest A.

Audit of the latest version

Source

API

GET https://markdownregistry.com/api/v1/artifacts/art_iibpsjiytnokma2g
GET https://markdownregistry.com/api/v1/resolve?ref=steipete/agent-scripts/codex-first
GET https://markdownregistry.com/api/v1/blob/1d6f61ac9a9669692436962d93e33a0c761a0f9081d9e7a710ddf5779c5e12af

Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.

Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.

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