cleanup: remove dead placeholder code, use RPC for identity loading

- links() in memory.rs: use cached_store() instead of MemoryNode::load()
- identity.rs: use memory_rpc for Store context loading
- defs.rs: delete dead placeholders (topology, nodes/episodes, health, split)
  - agents now use {{tool: graph_topology}} etc instead
- prompts.rs: delete unused format_split_plan_node()

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

src/agent/tools/memory.rs

@@ -301,7 +301,9 @@ async fn search(args: &serde_json::Value) -> Result<String> {
 
 async fn links(args: &serde_json::Value) -> Result<String> {
     let key = get_str(args, "key")?;
-    let node = MemoryNode::load(key)
+    let arc = cached_store().await?;
+    let store = arc.lock().await;
+    let node = MemoryNode::from_store(&store, key)
         .ok_or_else(|| anyhow::anyhow!("node not found: {}", key))?;
     let mut out = format!("Neighbors of '{}':\n", key);
     for (target, strength, is_new) in &node.links {

src/mind/identity.rs

@@ -92,10 +92,15 @@ fn load_memory_files(memory_project: Option<&Path>, context_groups: &[ContextGro
                 continue;
             }
             ContextSource::Store => {
-                // Load from the memory graph store
+                // Load from the memory graph store via RPC
                 for key in &group.keys {
-                    if let Some(node) = crate::hippocampus::memory::MemoryNode::load(key) {
+                    if let Ok(content) = crate::mcp_server::memory_rpc(
-                        memories.push((key.clone(), node.content));
+                        "memory_render",
+                        serde_json::json!({"key": key, "raw": true}),
+                    ) {
+                        if !content.trim().is_empty() {
+                            memories.push((key.clone(), content));
+                        }
                     }
                 }
             }

src/subconscious/defs.rs

@@ -208,24 +208,6 @@ fn resolve(
     count: usize,
 ) -> Option<Resolved> {
     match name {
-        "topology" => Some(Resolved {
-            text: super::prompts::format_topology_header(store, graph),
-            keys: vec![],
-        }),
-
-        "nodes" | "episodes" => {
-            let items = keys_to_replay_items(store, keys, graph);
-            Some(Resolved {
-                text: super::prompts::format_nodes_section(store, &items, graph),
-                keys: vec![], // keys already tracked from query
-            })
-        }
-
-        "health" => Some(Resolved {
-            text: super::prompts::format_health_section(store, graph),
-            keys: vec![],
-        }),
-
         "rename" => {
             if !keys.is_empty() {
                 // --target provided: present those keys as candidates
@@ -237,14 +219,6 @@ fn resolve(
             }
         }
 
-        "split" => {
-            let key = keys.first()?;
-            Some(Resolved {
-                text: super::prompts::format_split_plan_node(store, graph, key),
-                keys: vec![], // key already tracked from query
-            })
-        }
-
         // seed — render output for each seed node (content + deduped links)
         "seed" => {
             let mut text = String::new();

src/subconscious/prompts.rs

@@ -305,50 +305,6 @@ pub(super) fn format_rename_targets(store: &Store, keys: &[String]) -> String {
     out
 }
 
-/// Format a single node for split-plan prompt (phase 1)
-pub(super) fn format_split_plan_node(store: &Store, graph: &Graph, key: &str) -> String {
-    let communities = graph.communities();
-    let node = match store.nodes.get(key) {
-        Some(n) => n,
-        None => return format!("Node '{}' not found\n", key),
-    };
-
-    let mut out = String::new();
-    out.push_str(&format!("### {} ({} chars)\n", key, node.content.len()));
-
-    // Show neighbors grouped by community
-    let neighbors = graph.neighbors(key);
-    if !neighbors.is_empty() {
-        let mut by_community: std::collections::BTreeMap<String, Vec<(&str, f32)>> =
-            std::collections::BTreeMap::new();
-        for (nkey, strength) in &neighbors {
-            let comm = communities.get(nkey.as_str())
-                .map(|c| format!("c{}", c))
-                .unwrap_or_else(|| "unclustered".into());
-            by_community.entry(comm)
-                .or_default()
-                .push((nkey.as_str(), *strength));
-        }
-
-        out.push_str("\nNeighbors by community:\n");
-        for (comm, members) in &by_community {
-            out.push_str(&format!("  {} ({}):", comm, members.len()));
-            for (nkey, strength) in members.iter().take(5) {
-                out.push_str(&format!(" {}({:.2})", nkey, strength));
-            }
-            if members.len() > 5 {
-                out.push_str(&format!(" +{} more", members.len() - 5));
-            }
-            out.push('\n');
-        }
-    }
-
-    // Full content
-    out.push_str(&format!("\nContent:\n{}\n\n", node.content));
-    out.push_str("---\n\n");
-    out
-}
-
 /// Generate a specific agent prompt with filled-in data.
 pub fn agent_prompt(store: &Store, agent: &str, count: usize) -> Result<AgentBatch, String> {
     let def = super::defs::get_def(agent)