huskies: merge 880

server/src/agents/pool/start/spawn.rs

@@ -170,6 +170,23 @@ pub(super) async fn run_agent_spawn(
         prompt.push_str(&local);
     }
 
+    // Prepend epic context when the story belongs to an epic (AC3, story 880).
+    // Read the story's front matter to find the epic ID, then load the epic's
+    // content and prepend it to the system prompt so the agent treats it as
+    // authoritative context.
+    if let Some(story_content) = crate::db::read_content(&sid)
+        && let Ok(meta) = crate::io::story_metadata::parse_front_matter(&story_content)
+        && let Some(ref epic_id) = meta.epic
+        && let Some(epic_content) = crate::db::read_content(epic_id)
+    {
+        let block = format!(
+            "# Epic Context\n\nThis work item belongs to epic `{epic_id}`.\
+             The following is the authoritative epic context you must respect:\n\n\
+             ---\n{epic_content}\n---"
+        );
+        prompt = format!("{block}\n\n{prompt}");
+    }
+
     // Append a reference to the source map if the file was written.
     let source_map_path = project_root_clone.join(".huskies").join("source-map.json");
     if source_map_path.exists() {