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feat: auto-detect provider when switching models via /model (#1506)

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When typing /model deepseek-chat while on a different provider, the
model name now auto-resolves to the correct provider instead of
silently staying on the wrong one and causing API errors.

Detection priority:
1. Direct provider with credentials (e.g. DEEPSEEK_API_KEY set)
2. OpenRouter catalog match with proper slug remapping
3. Direct provider without creds (clear error beats silent failure)

Also adds DeepSeek as a first-class API-key provider — just set
DEEPSEEK_API_KEY and /model deepseek-chat routes directly.

Bare model names get remapped to proper OpenRouter slugs:
  /model gpt-5.4 → openai/gpt-5.4
  /model claude-opus-4.6 → anthropic/claude-opus-4.6

Salvages the concept from PR #1177 by @virtaava with credential
awareness and OpenRouter slug mapping added.

Co-authored-by: virtaava <virtaava@users.noreply.github.com>
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Teknium 2026-03-16 04:34:45 -07:00 • committed by GitHub
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4
tests/test_cli_model_command.py
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@ -64,8 +64,8 @@ class TestModelCommand:
cli_obj.process_command("/model gpt-5.4")
output = capsys.readouterr().out
# Model is accepted (with warning) even if not in API listing
assert cli_obj.model == "gpt-5.4"
# Auto-detection remaps bare model names to proper OpenRouter slugs
assert cli_obj.model == "openai/gpt-5.4"
def test_validation_crash_falls_back_to_save(self, capsys):
cli_obj = self._make_cli()