evaluate: include agent prompt + affected nodes in comparisons

Each comparison now shows the LLM:
- Agent instructions (the .agent prompt file)
- Report output (what the agent did)
- Affected nodes content (what it changed)

The comparator sees intent, action, and impact — can judge whether
a deletion was correct, whether links are meaningful, whether
WRITE_NODEs capture real insights.

Co-Authored-By: Kent Overstreet <kent.overstreet@linux.dev>

poc-memory/src/cli/agent.rs

@@ -151,22 +151,55 @@ pub fn cmd_evaluate_agents(samples_per_type: usize, model: &str) -> Result<(), S
     let agent_types = ["linker", "organize", "replay", "connector",
                        "separator", "transfer", "distill", "rename"];
 
-    let mut all_samples: Vec<(String, String, String)> = Vec::new(); // (agent_type, key, summary)
+    // Load agent prompt files for context
+    let prompts_dir = crate::config::get().data_dir
+        .parent().unwrap_or(std::path::Path::new("."))
+        .join("poc-memory/agents");
+
+    let mut all_samples: Vec<(String, String, String)> = Vec::new(); // (agent_type, key, context)
 
     for agent_type in &agent_types {
+        // Load the agent's prompt file (skip JSON header line)
+        let prompt_file = prompts_dir.join(format!("{}.agent", agent_type));
+        let agent_prompt = std::fs::read_to_string(&prompt_file)
+            .unwrap_or_default()
+            .lines().skip(1).collect::<Vec<_>>().join("\n");
+        let agent_prompt = crate::util::truncate(&agent_prompt, 500, "...");
+
         let prefix = format!("_consolidate-{}", agent_type);
         let mut keys: Vec<(String, i64)> = store.nodes.iter()
             .filter(|(k, _)| k.starts_with(&prefix))
             .map(|(k, n)| (k.clone(), n.timestamp))
             .collect();
-        keys.sort_by(|a, b| b.1.cmp(&a.1)); // newest first
+        keys.sort_by(|a, b| b.1.cmp(&a.1));
         keys.truncate(samples_per_type);
 
         for (key, _) in &keys {
-            let content = store.nodes.get(key)
-                .map(|n| crate::util::truncate(&n.content, 500, "..."))
+            let report = store.nodes.get(key)
+                .map(|n| n.content.clone())
                 .unwrap_or_default();
-            all_samples.push((agent_type.to_string(), key.clone(), content));
+
+            // Extract target node keys mentioned in the report and include their content
+            let mut target_content = String::new();
+            for word in report.split_whitespace() {
+                let clean = word.trim_matches(|c: char| !c.is_alphanumeric() && c != '-' && c != '_');
+                if clean.len() > 10 && store.nodes.contains_key(clean) {
+                    if let Some(node) = store.nodes.get(clean) {
+                        let preview = crate::util::truncate(&node.content, 200, "...");
+                        target_content.push_str(&format!("\n### {}\n{}\n", clean, preview));
+                        if target_content.len() > 1500 { break; }
+                    }
+                }
+            }
+
+            let context = format!(
+                "## Agent instructions\n{}\n\n## Report output\n{}\n\n## Affected nodes\n{}",
+                agent_prompt,
+                crate::util::truncate(&report, 1000, "..."),
+                if target_content.is_empty() { "(none found)".into() } else { target_content }
+            );
+
+            all_samples.push((agent_type.to_string(), key.clone(), context));
         }
     }