From b435cf06b78853bec87bf238f526bc60679d7712 Mon Sep 17 00:00:00 2001
From: t <t@tjp.lol>
Date: Wed, 10 Jun 2026 16:46:30 -0600
Subject: fix anthropic thinking effort json placement

---
 libpanto/src/provider_openai_chat.zig | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

(limited to 'libpanto/src/provider_openai_chat.zig')

diff --git a/libpanto/src/provider_openai_chat.zig b/libpanto/src/provider_openai_chat.zig
index 8319d9d..5152d3e 100644
--- a/libpanto/src/provider_openai_chat.zig
+++ b/libpanto/src/provider_openai_chat.zig
@@ -140,6 +140,10 @@ pub const OpenAIChatRequest = struct {
         rr.response = try rr.req.receiveHead(&redirect_buf);
 
         if (@intFromEnum(rr.response.head.status) >= 400) {
+            // `head.bytes` (which `iterateHeaders` walks) points into the
+            // connection read buffer and is invalidated the moment the body
+            // stream is initialized below. Capture Retry-After first.
+            const retry_after_ms = provider_mod.retryAfterFromHead(rr.response.head);
             // Drain body for diagnostics.
             const body_reader = rr.response.reader(&rr.transfer_buf);
             var err_buf: std.ArrayList(u8) = .empty;
@@ -159,7 +163,7 @@ pub const OpenAIChatRequest = struct {
             const classified = provider_mod.classifyHttpStatus(status, err_buf.items);
             if (self.diag) |d| {
                 d.status_code = status;
-                d.retry_after_ms = provider_mod.retryAfterFromHead(rr.response.head);
+                d.retry_after_ms = retry_after_ms;
             }
             return classified;
         }
-- 
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