Drop max_tokens cap on codegen; qwen3 reasoning truncation left content empty

qwen38-iq3s reasons extensively before emitting the skill body. A max_tokens
cap truncated the hidden reasoning (finish_reason: length) leaving content
empty, so the body write failed with 'skill body is empty'. Omit max_tokens
so the model runs to completion (~7 min); reasoning is filtered automatically
since only content is read. Client timeout default raised to 1200s.

config.example.json

@@ -13,10 +13,10 @@
   },
   "llm": {"base_url": "http://localhost:11434/v1", "model": "qwen3.5:4b"},
   "codegen": {
-    "_comment": "OpenAI-compatible model that writes runnable skill bodies. Larger/slower than the decision or self-assessment model.",
+    "_comment": "OpenAI-compatible model that writes runnable skill bodies. Larger/slower than the decision or self-assessment model. No max_tokens cap: qwen38-iq3s reasons extensively (~7 min) before emitting the body; reasoning is filtered automatically. timeout is seconds.",
     "base_url": "http://localhost:11434/v1",
     "model": "qwen38-iq3s",
-    "timeout": 600
+    "timeout": 1200
   },
   "skill_bodies": "data/skills",
   "skills": {