Regression: luna cannot be specified in spawn_agent tool model anymore, e.g. for Explorer

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#34,024 10 comments 14 reactions 0 assignees View on GitHub

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Assessment

Difficulty
3/5
Estimated time
1-2 days
Newbie friendliness
52/100
Issue type
Bug
Clarity
Mostly clear
Activity status
Quiet
Tech stack
rust
Domain
cli

Research direction

Start by reproducing the documented Explorer spawn_agent request on Windows with model gpt-5.6-luna, medium effort, and fork_steps set to none. The issue names no source file or test, so trace the spawn_agent tool's model handling first; done means luna sub-agents can be specified again while terra and sol continue to work.

Written by the indexing model from the issue text.

Description

app bug subagent windows-os
What version of the Codex App are you using (From “About Codex” dialog)?

26.715.21425

What subscription do you have?

$100

What platform is your computer?

Windows

What issue are you seeing?

My sol thread can spawn terra and sol sub-agents but cannot spawn luna sub-agents anymore. This was possible in previous versions.

What steps can reproduce the bug?

Ask sol: "spawn an Explorer sub-agent, set model/effort to gpt-5.6-luna medium, set hidden field 'fork_steps' to 'none', ask it to output OK"

What is the expected behavior?

No response

Additional information
Image
Dominant language
Rust
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Merged PRs (30d)
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