The fleet-foundation provider expansion added Anthropic/Zai/Stepfun/Minimax as
recognized providers (auth parser + PROVIDER_LIST), but also flipped all four to
TUI-supported in provider_is_supported_by_tui — making every ProviderKind
supported, killing the rejection path and breaking three build_tui_command
rejection tests (the flip had no positive test, so it was an unverified side
effect).
Anthropic speaks the native Messages API, not the OpenAI-compatible shape the
interactive loop expects, so it stays exec-only (as it was on origin):
`codewhale --provider anthropic` is rejected with a hint to use
`codewhale exec --provider anthropic`. Zai (GLM/Z.AI — the v0.8.60 headline),
Stepfun, and Minimax are OpenAI-compatible and remain interactively supported.
Restores the rejection guard and the 3 tests (now 95/0 in codewhale-cli).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Hunter B
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