diff --git a/android/app/src/main/java/com/fabledsword/thoughtsync/ui/ComposeSheet.kt b/android/app/src/main/java/com/fabledsword/thoughtsync/ui/ComposeSheet.kt
index 1894b32..545c794 100644
--- a/android/app/src/main/java/com/fabledsword/thoughtsync/ui/ComposeSheet.kt
+++ b/android/app/src/main/java/com/fabledsword/thoughtsync/ui/ComposeSheet.kt
@@ -9,7 +9,6 @@ import androidx.compose.foundation.layout.navigationBarsPadding
 import androidx.compose.foundation.layout.padding
 import androidx.compose.material3.Button
 import androidx.compose.material3.ExperimentalMaterial3Api
-import androidx.compose.material3.FilterChip
 import androidx.compose.material3.ModalBottomSheet
 import androidx.compose.material3.Text
 import androidx.compose.material3.TextButton
diff --git a/android/app/src/main/java/com/fabledsword/thoughtsync/ui/EditorChrome.kt b/android/app/src/main/java/com/fabledsword/thoughtsync/ui/EditorChrome.kt
index 6f6c557..1dfc04f 100644
--- a/android/app/src/main/java/com/fabledsword/thoughtsync/ui/EditorChrome.kt
+++ b/android/app/src/main/java/com/fabledsword/thoughtsync/ui/EditorChrome.kt
@@ -14,7 +14,6 @@ import androidx.compose.foundation.shape.CircleShape
 import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.automirrored.filled.List
 import androidx.compose.material.icons.filled.Close
-import androidx.compose.material.icons.filled.Create
 import androidx.compose.material.icons.filled.MoreVert
 import androidx.compose.material.icons.filled.Notifications
 import androidx.compose.material3.BottomAppBar
diff --git a/ci-requirements.md b/ci-requirements.md
index f356059..714bf28 100644
--- a/ci-requirements.md
+++ b/ci-requirements.md
@@ -305,6 +305,15 @@ matched CI run 3931's byte for byte. Same image, same lockfile, same units.
 take seconds (~30s for clippy). It is gitignored and reaches ~1.4 GB; delete it
 whenever the space is wanted.
 
+**Run these on every Rust-touching push, not just the ones that feel risky.** Four
+consecutive failures across M13's removals — a private `fn` deleted along with the
+`pub fn` above it, an orphaned `#[serde]` attribute left where a field was removed,
+and a test pinning a protocol version literal — were all caught by these three
+commands in under a minute each, after CI had already found them the slow way. A
+removal is exactly the kind of change that looks safe and isn't: nothing in the
+Python or TypeScript lanes compiles Rust, so a break can travel several commits
+before the first lane that does gets to it.
+
 **Don't infer formatting from existing code.** Several lines in `local/store.rs`
 exceed 100 characters and survive only because rustfmt cannot break a string
 literal — copying that shape caused one of four consecutive fmt-only CI failures,
diff --git a/core/src/sync/compat.rs b/core/src/sync/compat.rs
index 8593448..42104e1 100644
--- a/core/src/sync/compat.rs
+++ b/core/src/sync/compat.rs
@@ -344,13 +344,17 @@ mod tests {
     fn server_info_tolerates_unknown_and_absent_fields() {
         // Forward compatibility: a NEWER server sending fields we've never heard of
         // must not break the handshake.
-        let info: ServerInfo = serde_json::from_str(
-            r#"{"site_name":"S","sync_protocol_version":1,
-                "min_client_protocol_version":1,
+        // Versions come from the constants, not literals: this test is about unknown
+        // FIELDS, and pinning the numbers made it fail the moment the protocol moved
+        // to v2 — for a reason that has nothing to do with what it checks.
+        let body = format!(
+            r#"{{"site_name":"S","sync_protocol_version":{v},
+                "min_client_protocol_version":{v},
                 "sync_features":["notes","labels","attachments","tombstones","revisions"],
-                "some_future_field":{"nested":true}}"#,
-        )
-        .expect("unknown fields are ignored");
+                "some_future_field":{{"nested":true}}}}"#,
+            v = CLIENT_PROTOCOL_VERSION,
+        );
+        let info: ServerInfo = serde_json::from_str(&body).expect("unknown fields are ignored");
         assert_eq!(evaluate(&info), Compatibility::Ok);
     }