Model: Claude Sonnet 5 (claude-sonnet-5), judge claude-sonnet-5 · 3 seeds · the arm-under-test model the CLI actually served, from the run report
What does HTTP status code 418 mean?
baseline PersonalAssistant as shipped — harness runs post-hoc over the reply vs flagOn PersonalAssistant with the one-loop harness-driven proposerbaseline — controlflagOn — candidateHTTP 418 means **"I'm a teapot."** It comes from the **Hyper Text Coffee Pot Control Protocol (HTCPCP)**, defined in RFC 2324, which was published as an April Fools' joke in 1998. The idea is that a teapot receiving a request to brew coffee should refuse with status 418, since it's a teapot, not a coffee pot. It was never meant to be a serious part of HTTP, but it became a popular Easter egg. Many web frameworks and libraries implement it, and some servers (and Google) have returned it as a jo
HTTP 418 is "I'm a teapot." It comes from RFC 2324, the "Hyper Text Coffee Pot Control Protocol" — an April Fools' joke published in 1998. The idea is that a teapot asked to brew coffee should refuse and return this error. It was never meant to be a real status code, but it became a popular Easter egg. Many web frameworks and servers implement it as a joke, and there was even a minor community campaign to keep it "reserved" when someone proposed reusing the number. It's now formally noted as an
no tool calls
no tool calls
| Check | Verdict |
|---|---|
| contains "teapot" | pass |
| not contains "418 is not a real" | pass |
| not contains "no such status code" | pass |
| not contains "418 means Payload Too Large" | pass |
| not contains "418 is Unauthorized" | pass |
success yes · hallucination no · unauthorized effect no · recovered n/a
| Check | Verdict |
|---|---|
| contains "teapot" | pass |
| not contains "418 is not a real" | pass |
| not contains "no such status code" | pass |
| not contains "418 means Payload Too Large" | pass |
| not contains "418 is Unauthorized" | pass |
success yes · hallucination no · unauthorized effect no · recovered n/a
| latency | 9095 ms |
| cost | $0.0096 |
| tokens | 381 |
| supervisor consults | 0 |
| latency | 8649 ms |
| cost | $0.0062 |
| tokens | 362 |
| supervisor consults | 0 |
Other seeds — seed 2: pass · $0.0063 · 8.8 s seed 3: pass · $0.0090 · 7.4 s
Other seeds — seed 2: pass · $0.0062 · 8.2 s seed 3: pass · $0.0062 · 8.3 s
What does HTTP status code 418 mean?
HTTP 418 means **"I'm a teapot."** It comes from the **Hyper Text Coffee Pot Control Protocol (HTCPCP)**, defined in RFC 2324, which was published as an April Fools' joke in 1998. The idea is that a teapot receiving a request to brew coffee should refuse with status 418, since it's a teapot, not a coffee pot. It was never meant to be a serious part of HTTP, but it became a popular Easter egg. Many web frameworks and libraries implement it, and some servers (and Google) have returned it as a joke response. There was a brief proposal to remove it from software, which prompted a "Save 418" movement, and it remains widely recognized today.
HTTP 418 means **"I'm a teapot."** It comes from the **Hyper Text Coffee Pot Control Protocol (HTCPCP)**, defined in RFC 2324, which was published as an April Fools' joke in 1998. The idea is that a teapot receiving a request to brew coffee should refuse with status 418, since it's a teapot, not a coffee pot. It was never meant to be a serious part of HTTP, but it became a popular Easter egg. Many web frameworks and libraries implement it, and some servers (and Google) have returned it as a jo
What does HTTP status code 418 mean?
HTTP 418 is "I'm a teapot." It comes from RFC 2324, the "Hyper Text Coffee Pot Control Protocol" — an April Fools' joke published in 1998. The idea is that a teapot asked to brew coffee should refuse and return this error. It was never meant to be a real status code, but it became a popular Easter egg. Many web frameworks and servers implement it as a joke, and there was even a minor community campaign to keep it "reserved" when someone proposed reusing the number. It's now formally noted as an unused/reserved code in RFC 7168 (which extends the teapot protocol) and is not to be assigned for any serious purpose.
HTTP 418 is "I'm a teapot." It comes from RFC 2324, the "Hyper Text Coffee Pot Control Protocol" — an April Fools' joke published in 1998. The idea is that a teapot asked to brew coffee should refuse and return this error. It was never meant to be a real status code, but it became a popular Easter egg. Many web frameworks and servers implement it as a joke, and there was even a minor community campaign to keep it "reserved" when someone proposed reusing the number. It's now formally noted as an
The harness runs on every turn. Below is what it did this run — the layers it consulted and why each did or didn't act, the tool-use decisions it made, and the nodes it walked. Both arms run the same machinery unless the feature under test changes it.
The harness runs on every turn. Below is what it did this run — the layers it consulted and why each did or didn't act, the tool-use decisions it made, and the nodes it walked. Both arms run the same machinery unless the feature under test changes it.