add ollama support

.env.example

@@ -19,3 +19,20 @@
 # ANTHROPIC_DEFAULT_SONNET_MODEL=glm-4.7
 # ANTHROPIC_DEFAULT_OPUS_MODEL=glm-4.7
 # ANTHROPIC_DEFAULT_HAIKU_MODEL=glm-4.5-air
+
+# Ollama Local Model Configuration (Optional)
+# To use local models via Ollama instead of Claude, uncomment and set these variables.
+# Requires Ollama v0.14.0+ with Anthropic API compatibility.
+# See: https://ollama.com/blog/claude
+#
+# ANTHROPIC_BASE_URL=http://localhost:11434
+# ANTHROPIC_AUTH_TOKEN=ollama
+# API_TIMEOUT_MS=3000000
+# ANTHROPIC_DEFAULT_SONNET_MODEL=qwen3-coder
+# ANTHROPIC_DEFAULT_OPUS_MODEL=qwen3-coder
+# ANTHROPIC_DEFAULT_HAIKU_MODEL=qwen3-coder
+#
+# Model recommendations:
+# - For best results, use a capable coding model like qwen3-coder or deepseek-coder-v2
+# - You can use the same model for all tiers, or different models per tier
+# - Larger models (70B+) work best for Opus tier, smaller (7B-20B) for Haiku