Drop conflicting auth keys from the Codex requesty provider on configure

[devin-ai-integration]

Summary

Fixes this user report on requesty codex:

Error loading config.toml: model_providers.requesty: provider auth cannot be combined with env_key

A hand-written [model_providers.requesty] can set env_key = "OPENAI_API_KEY", which is what our Codex docs describe. Our auth.command then lands on that same table and Codex refuses it. Codex also refuses auth combined with experimental_bearer_token or requires_openai_auth. This happens both when the -c overrides from requesty codex are merged in and when requesty configure merges into the file.

[model_providers.requesty] is our own section, so configureMerge now deletes those three keys from it after merging:

delete(config["model_providers"]["requesty"], "env_key" | "experimental_bearer_token" | "requires_openai_auth")

Everything else is still merged, and the file is still backed up first.

Launch is unchanged and writes nothing to disk. A user who only runs requesty codex without re-configuring will still see the error until they run configure, or remove the key by hand.

Test added: TestCodexHarnessConfigureMergeDropsConflictingProviderAuth

Link to Devin session: https://app.devin.ai/sessions/c3f712f027814498ab963003b0d22e9a
Open in Devin Desktop: https://app.devin.ai/desktop/session/c3f712f027814498ab963003b0d22e9a?variant=devin

[github-actions]

AI Cost

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_{Updated 2026-09-29T10:36Z · last 30 days · data from Requesty}

[devin-ai-integration]

I'll fix CI failures and address comments from users with write access. I'll skip comments containing "(aside)".

• Disable automatic comment, CI, and merge conflict monitoring

[lavicosa]

Squash your commits.

[devin-ai-integration]

Squashed into a single commit (89f1efd).