Ask Claude For Codex

Ask Claude for Codex

A second opinion is useful only when it is actually a second opinion.

Ask Claude for Codex is an Agent Skill that lets Codex consult the locally authenticated Claude Code CLI without leaving the current task. The Claude session is read-only and isolated from local Claude customizations by default. It can still persist across follow-up questions, because rebuilding the same context for every objection is independence taken a little too literally.

The default is **Fable 5.1 with high reasoning effort**. A request can select another Claude model alias or full model ID, change the effort level and budget, or deliberately enable the local Claude setup.

Why this Skill?

Asking another model can expose a weak assumption, an overlooked failure path, or a genuinely different reading. But another model inside the same instructions, plugins and project framing is not as independent as the phrase "second opinion" suggests. This Skill keeps the consultation separate by default, gives it a fixed read-only tool surface, and makes the remaining choices explicit.

Claude's answer is still advice. Codex must verify it before the answer becomes an edit, a decision, or the wonderfully confident announcement that everything is now fixed.

How to use

Invoke the Skill explicitly or ask naturally:

$ask-claude-for-codex Review this implementation plan with the defaults.

Ask Opus 5 with max reasoning to challenge this architecture.

Frage Fable, ob dieser Fix die eigentliche Ursache behebt.

Unless overridden, the Skill uses:

Setting	Default
Model	claude-fable-5-1
Reasoning effort	high
Budget ceiling	USD 10
Claude tools	Read,Grep,Glob,WebSearch,WebFetch
Session persistence	Enabled
Claude customizations	Disabled with safe mode

Model values are passed to Claude Code as aliases or full IDs. For example, `opus` selects the current Opus alias. Effort accepts `low