style: cargo fmt on today's new code (883/884/886/opus-pin)

The mergemaster gates run rustfmt and rejected 864's merge because
several files I added/touched in master today had not been fmt'd.
Six files affected, mostly trivial line-wrapping nits. Fixes the
formatting gate for the next 864 merge attempt.

server/src/agents/pool/auto_assign/story_checks.rs

@@ -318,12 +318,12 @@ mod tests {
         );
 
         // Set the typed CRDT register (this is the path 871's migration uses).
-        let written =
-            crate::crdt_state::set_agent("9971_story_pin_in_crdt", Some("coder-opus"));
+        let written = crate::crdt_state::set_agent("9971_story_pin_in_crdt", Some("coder-opus"));
         assert!(written, "set_agent should succeed for an existing item");
 
         // The reader must return the CRDT register value, not None.
-        let agent = read_story_front_matter_agent(tmp.path(), "2_current", "9971_story_pin_in_crdt");
+        let agent =
+            read_story_front_matter_agent(tmp.path(), "2_current", "9971_story_pin_in_crdt");
         assert_eq!(agent.as_deref(), Some("coder-opus"));
     }
 }

server/src/chat/transport/matrix/bot/permission_listener.rs

@@ -36,9 +36,7 @@ pub fn spawn_permission_listener(
     tokio::spawn(async move {
         let mut perm_rx = services.perm_rx.lock().await;
         let target_room_str = target_room.as_str().to_string();
-        slog!(
-            "[matrix-bot] permission listener started; forwarding requests to {target_room_str}"
-        );
+        slog!("[matrix-bot] permission listener started; forwarding requests to {target_room_str}");
 
         while let Some(perm_fwd) = perm_rx.recv().await {
             let prompt_msg = format!(
@@ -131,13 +129,7 @@ mod tests {
             Ok("$test_event_id:example.com".to_string())
         }
 
-        async fn edit_message(
-            &self,
-            _: &str,
-            _: &str,
-            _: &str,
-            _: &str,
-        ) -> Result<(), String> {
+        async fn edit_message(&self, _: &str, _: &str, _: &str, _: &str) -> Result<(), String> {
             Ok(())
         }
 
@@ -146,19 +138,14 @@ mod tests {
         }
     }
 
-    fn test_services_with_tx() -> (
-        Arc<Services>,
-        mpsc::UnboundedSender<PermissionForward>,
-    ) {
+    fn test_services_with_tx() -> (Arc<Services>, mpsc::UnboundedSender<PermissionForward>) {
         let (perm_tx, perm_rx) = mpsc::unbounded_channel();
         let services = Arc::new(Services {
             project_root: std::path::PathBuf::from("/tmp/test"),
             agents: Arc::new(crate::agents::AgentPool::new_test(3000)),
             bot_name: "Assistant".to_string(),
             bot_user_id: "@bot:example.com".to_string(),
-            ambient_rooms: Arc::new(std::sync::Mutex::new(
-                std::collections::HashSet::new(),
-            )),
+            ambient_rooms: Arc::new(std::sync::Mutex::new(std::collections::HashSet::new())),
             perm_rx: Arc::new(TokioMutex::new(perm_rx)),
             pending_perm_replies: Arc::new(TokioMutex::new(HashMap::new())),
             permission_timeout_secs: 120,

server/src/http/mcp/mod.rs

@@ -61,11 +61,7 @@ pub async fn mcp_get_handler() -> Response {
 /// `POST /mcp` — JSON-RPC 2.0 entry point for `initialize`, `tools/list`,
 /// `tools/call`, and `notifications/*`.
 #[handler]
-pub async fn mcp_post_handler(
-    req: &Request,
-    body: Body,
-    ctx: Data<&Arc<AppContext>>,
-) -> Response {
+pub async fn mcp_post_handler(req: &Request, body: Body, ctx: Data<&Arc<AppContext>>) -> Response {
     let content_type = req.header("content-type").unwrap_or("");
     if !content_type.is_empty() && !content_type.contains("application/json") {
         return json_response(JsonRpcResponse::error(

server/src/http/mcp/shell_tools/script.rs

@@ -366,12 +366,8 @@ async fn run_script_tool(
 
     // When verbose, fall back to the legacy truncated output so callers
     // who actually want raw text still get a bounded payload.
-    let mut payload = build_diagnostic_response(
-        result.status.success(),
-        exit_code,
-        &combined,
-        verbose,
-    );
+    let mut payload =
+        build_diagnostic_response(result.status.success(), exit_code, &combined, verbose);
     if verbose {
         payload["output"] = serde_json::json!(truncate_output(&combined, MAX_OUTPUT_LINES));
     }
@@ -715,7 +711,10 @@ mod tests {
             "last error code should be parsed"
         );
         let summary = parsed["summary"].as_str().expect("summary string");
-        assert!(summary.contains("150 error"), "summary mentions error count: {summary}");
+        assert!(
+            summary.contains("150 error"),
+            "summary mentions error count: {summary}"
+        );
         // Default response should be small even with 150 errors.
         assert!(
             result.len() < 50_000,
@@ -724,9 +723,13 @@ mod tests {
         );
 
         // Verbose mode: raw output is included.
-        let result_v = tool_run_check(&json!({"verbose": true}), &ctx).await.unwrap();
+        let result_v = tool_run_check(&json!({"verbose": true}), &ctx)
+            .await
+            .unwrap();
         let parsed_v: serde_json::Value = serde_json::from_str(&result_v).unwrap();
-        let output = parsed_v["output"].as_str().expect("verbose includes output");
+        let output = parsed_v["output"]
+            .as_str()
+            .expect("verbose includes output");
         assert!(output.contains("error[E1]"), "verbose contains first line");
         assert!(output.contains("error[E150]"), "verbose contains last line");
     }

server/src/service/shell/mod.rs

@@ -8,12 +8,12 @@
 
 /// Side-effectful shell I/O — filesystem permission checks.
 pub mod io;
-/// Pure command-safety checks, blocked-binary lists, and output truncation.
-pub mod path_guard;
 /// Cargo / rustc diagnostic parser — extracts structured errors and warnings
 /// from raw cargo output. Used by run_check / run_build / run_lint MCP tools
 /// (bug 886).
 pub mod parse_diagnostics;
+/// Pure command-safety checks, blocked-binary lists, and output truncation.
+pub mod path_guard;
 
 #[allow(unused_imports)]
 pub use path_guard::{

server/src/service/shell/parse_diagnostics.rs

@@ -59,8 +59,8 @@ pub fn parse_diagnostics(output: &str) -> Vec<Diagnostic> {
         // Anchored to start-of-line: "error" or "warning", optional [CODE], colon, message.
         Regex::new(r"^(error|warning)(?:\[([A-Za-z0-9]+)\])?: (.+)$").unwrap()
     });
-    let loc_re = LOC_RE
-        .get_or_init(|| Regex::new(r"^\s*-->\s+([^:\s][^:]*):(\d+)(?::\d+)?\s*$").unwrap());
+    let loc_re =
+        LOC_RE.get_or_init(|| Regex::new(r"^\s*-->\s+([^:\s][^:]*):(\d+)(?::\d+)?\s*$").unwrap());
 
     let lines: Vec<&str> = output.lines().collect();
     let mut diagnostics = Vec::new();
@@ -155,7 +155,8 @@ mod tests {
 
     #[test]
     fn ignores_non_diagnostic_lines() {
-        let input = "    Checking huskies v0.10.4\n   Compiling foo v0.1.0\n    Finished dev profile\n";
+        let input =
+            "    Checking huskies v0.10.4\n   Compiling foo v0.1.0\n    Finished dev profile\n";
         assert!(parse_diagnostics(input).is_empty());
     }
 
@@ -192,8 +193,10 @@ error: could not compile `huskies` (bin \"huskies\") due to 3 previous errors; 1
         assert_eq!(summary.warning_count, 2);
 
         // The 3 main compile errors must be present with file + line.
-        let e0061: Vec<&Diagnostic> =
-            diags.iter().filter(|d| d.code.as_deref() == Some("E0061")).collect();
+        let e0061: Vec<&Diagnostic> = diags
+            .iter()
+            .filter(|d| d.code.as_deref() == Some("E0061"))
+            .collect();
         assert_eq!(e0061.len(), 3);
         let files: Vec<Option<&str>> = e0061.iter().map(|d| d.file.as_deref()).collect();
         assert!(files.contains(&Some("server/src/agents/pool/auto_assign/merge.rs")));