diff --git a/ant/testdata/basic_convo.httprr b/ant/testdata/basic_convo.httprr
new file mode 100644
index 0000000..663de8d
--- /dev/null
+++ b/ant/testdata/basic_convo.httprr
@@ -0,0 +1,116 @@
+httprr trace v1
+457 1329
+POST https://api.anthropic.com/v1/messages HTTP/1.1
+Host: api.anthropic.com
+User-Agent: Go-http-client/1.1
+Content-Length: 261
+Anthropic-Version: 2023-06-01
+Content-Type: application/json
+
+{
+ "model": "claude-3-7-sonnet-20250219",
+ "messages": [
+  {
+   "role": "user",
+   "content": [
+    {
+     "type": "text",
+     "text": "Hi, my name is Cornelius",
+     "cache_control": {
+      "type": "ephemeral"
+     }
+    }
+   ]
+  }
+ ],
+ "max_tokens": 8192
+}HTTP/2.0 200 OK
+Anthropic-Organization-Id: 3c473a21-7208-450a-a9f8-80aebda45c1b
+Anthropic-Ratelimit-Input-Tokens-Limit: 200000
+Anthropic-Ratelimit-Input-Tokens-Remaining: 200000
+Anthropic-Ratelimit-Input-Tokens-Reset: 2025-03-11T17:45:06Z
+Anthropic-Ratelimit-Output-Tokens-Limit: 80000
+Anthropic-Ratelimit-Output-Tokens-Remaining: 79000
+Anthropic-Ratelimit-Output-Tokens-Reset: 2025-03-11T17:45:07Z
+Anthropic-Ratelimit-Requests-Limit: 4000
+Anthropic-Ratelimit-Requests-Remaining: 3999
+Anthropic-Ratelimit-Requests-Reset: 2025-03-11T17:45:05Z
+Anthropic-Ratelimit-Tokens-Limit: 280000
+Anthropic-Ratelimit-Tokens-Remaining: 279000
+Anthropic-Ratelimit-Tokens-Reset: 2025-03-11T17:45:06Z
+Cf-Cache-Status: DYNAMIC
+Cf-Ray: 91ecdd10fdc3f97f-SJC
+Content-Type: application/json
+Date: Tue, 11 Mar 2025 17:45:07 GMT
+Request-Id: req_01LBtxMdNzxDcDVPGJSh7giv
+Server: cloudflare
+Via: 1.1 google
+X-Robots-Tag: none
+
+{"id":"msg_01S1uUyUsTaKPBKuDUGGX8J2","type":"message","role":"assistant","model":"claude-3-7-sonnet-20250219","content":[{"type":"text","text":"Hello, Cornelius! It's nice to meet you. How are you doing today? Is there something I can help you with?"}],"stop_reason":"end_turn","stop_sequence":null,"usage":{"input_tokens":15,"cache_creation_input_tokens":0,"cache_read_input_tokens":0,"output_tokens":31}}779 1286
+POST https://api.anthropic.com/v1/messages HTTP/1.1
+Host: api.anthropic.com
+User-Agent: Go-http-client/1.1
+Content-Length: 583
+Anthropic-Version: 2023-06-01
+Content-Type: application/json
+
+{
+ "model": "claude-3-7-sonnet-20250219",
+ "messages": [
+  {
+   "role": "user",
+   "content": [
+    {
+     "type": "text",
+     "text": "Hi, my name is Cornelius"
+    }
+   ]
+  },
+  {
+   "role": "assistant",
+   "content": [
+    {
+     "type": "text",
+     "text": "Hello, Cornelius! It's nice to meet you. How are you doing today? Is there something I can help you with?"
+    }
+   ]
+  },
+  {
+   "role": "user",
+   "content": [
+    {
+     "type": "text",
+     "text": "What is my name?",
+     "cache_control": {
+      "type": "ephemeral"
+     }
+    }
+   ]
+  }
+ ],
+ "max_tokens": 8192
+}HTTP/2.0 200 OK
+Anthropic-Organization-Id: 3c473a21-7208-450a-a9f8-80aebda45c1b
+Anthropic-Ratelimit-Input-Tokens-Limit: 200000
+Anthropic-Ratelimit-Input-Tokens-Remaining: 200000
+Anthropic-Ratelimit-Input-Tokens-Reset: 2025-03-11T17:45:07Z
+Anthropic-Ratelimit-Output-Tokens-Limit: 80000
+Anthropic-Ratelimit-Output-Tokens-Remaining: 80000
+Anthropic-Ratelimit-Output-Tokens-Reset: 2025-03-11T17:45:07Z
+Anthropic-Ratelimit-Requests-Limit: 4000
+Anthropic-Ratelimit-Requests-Remaining: 3999
+Anthropic-Ratelimit-Requests-Reset: 2025-03-11T17:45:07Z
+Anthropic-Ratelimit-Tokens-Limit: 280000
+Anthropic-Ratelimit-Tokens-Remaining: 280000
+Anthropic-Ratelimit-Tokens-Reset: 2025-03-11T17:45:07Z
+Cf-Cache-Status: DYNAMIC
+Cf-Ray: 91ecdd1ae9a6f97f-SJC
+Content-Type: application/json
+Date: Tue, 11 Mar 2025 17:45:07 GMT
+Request-Id: req_01MBf3RWXNfQgwhVRwwkBYSn
+Server: cloudflare
+Via: 1.1 google
+X-Robots-Tag: none
+
+{"id":"msg_01FGz6DeWeDpspJG8cuxyVE9","type":"message","role":"assistant","model":"claude-3-7-sonnet-20250219","content":[{"type":"text","text":"Your name is Cornelius, as you mentioned in your introduction."}],"stop_reason":"end_turn","stop_sequence":null,"usage":{"input_tokens":54,"cache_creation_input_tokens":0,"cache_read_input_tokens":0,"output_tokens":17}}
\ No newline at end of file