Record straylight's new slot layout: four slots over one 262144-token pool

loopd's self-test caught the change (context per slot 131072 -> 262144,
slots 2 -> 4). The device tests keep the expectation in one constant, and
the M3a script matches it; verify-device passes 6 of 6 and the M3a device
check passes. The inference contract notes which M0 findings rest on the old
layout and need re-measuring.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

crates/loopd/tests/device.rs

@@ -59,6 +59,13 @@ impl Drop for Proxy {
     }
 }
 
+/// The server as deployed on straylight, recorded in one place. When the deployment changes on
+/// purpose, change this and `tools/check-m3a-device.sh` together, and note it in
+/// `docs/inference-contract.md`. Since 2026-09-22: four slots over one 262,144-token pool.
+const EXPECT: &str = r#"template_sha256 = "f55f52930aa8bf44ab5cb85f99370fcc3c56e9a85640b812086d5330bce5d86b"
+n_ctx = 262144
+slots = 4"#;
+
 fn socket_path(name: &str) -> PathBuf {
     let dir = std::env::temp_dir().join(format!("loopd-device-{}-{name}", std::process::id()));
     std::fs::create_dir_all(&dir).unwrap();
@@ -77,9 +84,7 @@ model = "{model}"
 main = 0
 background = 1
 [expect]
-template_sha256 = "f55f52930aa8bf44ab5cb85f99370fcc3c56e9a85640b812086d5330bce5d86b"
-n_ctx = 131072
-slots = 2
+{EXPECT}
 "#,
         socket.display()
     );
@@ -253,9 +258,7 @@ model = "{model}"
 main = 0
 background = 1
 [expect]
-template_sha256 = "f55f52930aa8bf44ab5cb85f99370fcc3c56e9a85640b812086d5330bce5d86b"
-n_ctx = 131072
-slots = 2
+{EXPECT}
 [paths]
 home = "{}"
 "#,