huskies: merge 822

server/src/agents/pool/pipeline/advance/mod.rs

@@ -13,6 +13,26 @@ use tokio::sync::broadcast;
 use super::super::super::{CompletionReport, PipelineStage, agent_config_stage, pipeline_stage};
 use super::super::{AgentPool, StoryAgent};
 
+/// Maximum number of bytes of gate output to include in the failure context
+/// injected into the resumed session.  Keeps the injected message focused —
+/// the tail of the output (where errors appear) is always preserved.
+const MAX_GATE_OUTPUT_BYTES: usize = 8_000;
+
+/// Truncate gate output to [`MAX_GATE_OUTPUT_BYTES`], keeping the **tail**
+/// (where compiler errors and test failures are reported).
+fn truncate_gate_output(output: &str) -> &str {
+    if output.len() <= MAX_GATE_OUTPUT_BYTES {
+        return output;
+    }
+    let start = output.len() - MAX_GATE_OUTPUT_BYTES;
+    // Advance to the next valid UTF-8 char boundary.
+    let mut adjusted = start;
+    while !output.is_char_boundary(adjusted) {
+        adjusted += 1;
+    }
+    &output[adjusted..]
+}
+
 impl AgentPool {
     /// Pipeline advancement: after an agent completes, move the story to
     /// the next pipeline stage and start the appropriate agent.
@@ -197,7 +217,7 @@ impl AgentPool {
                             "\n\n---\n## Previous Attempt Failed\n\
                              The acceptance gates failed with the following output:\n{}\n\n\
                              Please review the failures above, fix the issues, and try again.",
-                            completion.gate_output
+                            truncate_gate_output(&completion.gate_output)
                         );
                         if let Err(e) = self
                             .start_agent(