phase 1 done

1 files changed, 37 insertions, 9 deletions

diff --git a/libpanto/src/config.zig b/libpanto/src/config.zig
index 295f2c6..74bdcc7 100644
--- a/libpanto/src/config.zig
+++ b/libpanto/src/config.zig
@@ -1,5 +1,20 @@
 pub const APIStyle = enum {
-    anthropic,
+    openai_chat,
+};
+
+/// Reasoning intensity hint sent to providers that support it.
+///
+/// `.default` omits the field entirely so the provider's own default applies.
+/// `.off` sends `"none"` (supported by OpenRouter/NanoGPT; ignored or rejected
+/// elsewhere). The remaining values mirror the `reasoning_effort` parameter
+/// accepted by OpenAI reasoning models and OpenAI-compatible proxies.
+pub const ReasoningEffort = enum {
+    default,
+    off,
+    minimal,
+    low,
+    medium,
+    high,
 };
 
 pub const Config = struct {
@@ -7,19 +22,32 @@ pub const Config = struct {
     api_key: []const u8,
     base_url: []const u8,
     model: []const u8,
+    reasoning: ReasoningEffort = .default,
 };
 
 const t = @import("std").testing;
 
 test "Config - construct with all fields" {
     const cfg = Config{
-        .api_style = .anthropic,
-        .api_key = "sk-ant-test",
-        .base_url = "https://api.anthropic.com",
-        .model = "claude-sonnet-4-20250514",
+        .api_style = .openai_chat,
+        .api_key = "sk-test",
+        .base_url = "https://api.openai.com/v1",
+        .model = "gpt-4o",
+        .reasoning = .high,
+    };
+    try t.expectEqual(APIStyle.openai_chat, cfg.api_style);
+    try t.expectEqualStrings("sk-test", cfg.api_key);
+    try t.expectEqualStrings("https://api.openai.com/v1", cfg.base_url);
+    try t.expectEqualStrings("gpt-4o", cfg.model);
+    try t.expectEqual(ReasoningEffort.high, cfg.reasoning);
+}
+
+test "Config - reasoning defaults to .default" {
+    const cfg = Config{
+        .api_style = .openai_chat,
+        .api_key = "k",
+        .base_url = "u",
+        .model = "m",
     };
-    try t.expectEqual(APIStyle.anthropic, cfg.api_style);
-    try t.expectEqualStrings("sk-ant-test", cfg.api_key);
-    try t.expectEqualStrings("https://api.anthropic.com", cfg.base_url);
-    try t.expectEqualStrings("claude-sonnet-4-20250514", cfg.model);
+    try t.expectEqual(ReasoningEffort.default, cfg.reasoning);
 }