Broaden client-neutral OpenAI and llama.cpp chat compatibility

test_api_compat.py

@@ -23,3 +23,31 @@ class CompatibilityTests(unittest.TestCase):
   self.assertFalse(original['chat_template_kwargs']['enable_thinking'])
   for bad in [None,[],{'enable_thinking':'false'},{'template':'custom'},{'preserve_thinking':1}]:
    with self.assertRaises(CompatibilityError):normalize_chat({'chat_template_kwargs':bad})
+
+ def test_openai_aliases_and_legacy_tools(self):
+  request={'max_completion_tokens':32,'functions':[{'name':'echo','parameters':{'type':'object'}}],'function_call':{'name':'echo'},'stop':None}
+  body,_=normalize_chat(request)
+  self.assertEqual(body['max_tokens'],32)
+  self.assertEqual(body['tools'][0]['function']['name'],'echo')
+  self.assertEqual(body['tool_choice']['function']['name'],'echo')
+  self.assertNotIn('stop',body)
+  self.assertIn('functions',request)
+
+ def test_sdk_extra_body_and_conflicts(self):
+  body,_=normalize_chat({'extra_body':{'min_p':.05,'chat_template_kwargs':{'enable_thinking':False}},'max_tokens':8})
+  self.assertEqual(body['min_p'],.05)
+  for request in [{'extra_body':{'model':'other'}},{'extra_body':{'min_p':.1},'min_p':.2},{'max_tokens':8,'max_completion_tokens':16},{'functions':[],'tools':[{}]}]:
+   with self.assertRaises(CompatibilityError):normalize_chat(request)
+
+ def test_metadata_is_explicitly_reported_not_forwarded(self):
+  body,info=normalize_chat({'store':False,'metadata':{'project':'synthetic'},'service_tier':'default'})
+  self.assertEqual(body,{})
+  self.assertEqual(set(info['ignored']),{'store','metadata','service_tier'})
+  for request in [{'store':True},{'service_tier':'priority'},{'metadata':{'x':42}}]:
+   with self.assertRaises(CompatibilityError):normalize_chat(request)
+
+ def test_llama_validation(self):
+  body,_=normalize_chat({'repeat_last_n':-1,'mirostat':2,'mirostat_eta':.1,'typical_p':1,'cache_prompt':True,'reasoning_format':'auto','logit_bias':{'123':-10}})
+  self.assertEqual(body['logit_bias'],{'123':-10})
+  for request in [{'min_p':float('nan')},{'cache_prompt':1},{'repeat_last_n':.5},{'logit_bias':{'not-token':1}},{'mirostat':3},{'reasoning_format':'invented'}]:
+   with self.assertRaises(CompatibilityError):normalize_chat(request)