Under the hood
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Model-id remapping via CLAUDE_CODE_BREEZY_HORIZON now validates ids more strictly and warns on no-op mappings
What
The mechanism that lets a model id be substituted for another before a prompt is sent (driven by the CLAUDE_CODE_BREEZY_HORIZON environment variable or server-supplied config) now validates candidate model ids more precisely. It also warns distinctly when a mapping's target is the same model it's meant to replace, reporting that the mapping "maps nothing," instead of silently treating it as a no-op.
Why
This makes a misconfigured or pointless model-id mapping visible as a warning instead of failing silently, making it easier to notice when a substitution rule isn't actually doing anything.
Names in the bundleCLAUDE_CODE_BREEZY_HORIZON