Merge nucleic/sleek-thistle-egret-fyej into dev

nash-observe/src/lib.rs

@@ -82,6 +82,18 @@ enum Event {
         hash: String,
         preview_b64: String,
     },
+    #[serde(rename = "pipe", rename_all = "camelCase")]
+    Pipe {
+        seq: u64,
+        ts: u64,
+        pipeline_id: u64,
+        from_index: u64,
+        to_index: u64,
+        bytes: u64,
+        truncated: bool,
+        hash: String,
+        preview_b64: String,
+    },
     #[serde(rename = "dropped", rename_all = "camelCase")]
     Dropped { seq: u64, ts: u64, count: u64 },
 }
@@ -460,6 +472,25 @@ impl brush_core::gate::Gate for RecordingGate {
             });
         }));
     }
+
+    fn on_pipe(&self, ev: brush_core::gate::PipeEvent) {
+        let _ = std::panic::catch_unwind(std::panic::AssertUnwindSafe(|| {
+            let Some(obs) = OBSERVER.get() else { return };
+            let capped = ev.captured.len().min(PREVIEW_CAP);
+            obs.send(Event::Pipe {
+                seq: obs.seq(),
+                ts: now_millis(),
+                pipeline_id: ev.pipeline_id,
+                from_index: ev.from_index as u64,
+                to_index: ev.to_index as u64,
+                bytes: ev.total_bytes,
+                truncated: ev.truncated || ev.captured.len() > capped,
+                // Hash over the captured prefix (the full stream isn't buffered).
+                hash: fnv1a_hex(&ev.captured),
+                preview_b64: preview_b64(&ev.captured[..capped]),
+            });
+        }));
+    }
 }
 
 // ---------------------------------------------------------------------------