feat: implement branch-aware context switching and integrate tantivy fuzzy search index

server/src/handlers.rs

@@ -175,6 +175,7 @@ impl ServerHandler for MemoryHandler {
                                         entity_type: full_e.entity_type.clone(),
                                         observations: vec![],
                                         namespace: full_e.namespace.clone(),
+                                        git_branch: None,
                                     });
                             e.observations.extend(o.contents);
                             g.entities.insert(o.entity_name, e);
@@ -463,6 +464,7 @@ impl ServerHandler for MemoryHandler {
                         description: req.description,
                         created_at: now,
                         updated_at: now,
+                        git_branch: req.git_branch,
                     });
                 });
                 Ok(ServerResult::from(CallToolResult::text_content(vec![
@@ -496,8 +498,12 @@ impl ServerHandler for MemoryHandler {
                 }
             }
             "list_active_tasks" => {
+                let req: ListActiveTasksTool = parse_args(args)?;
                 let mut tasks = self.state.tasks.read();
                 tasks.retain(|t| t.status != "done");
+                if let Some(branch) = req.git_branch {
+                    tasks.retain(|t| t.git_branch.is_none() || t.git_branch.as_deref() == Some(branch.as_str()));
+                }
                 let data = serde_json::to_string(&tasks).unwrap_or_default();
                 Ok(ServerResult::from(CallToolResult::text_content(vec![
                     data.into(),
@@ -710,6 +716,7 @@ impl ServerHandler for MemoryHandler {
                             .duration_since(UNIX_EPOCH)
                             .unwrap()
                             .as_secs(),
+                        git_branch: req.git_branch,
                     });
                 });
                 Ok(ServerResult::from(CallToolResult::text_content(vec![
@@ -732,6 +739,9 @@ impl ServerHandler for MemoryHandler {
                 if let Some(ns) = req.namespace {
                     pinned.retain(|p| p.namespace == ns);
                 }
+                if let Some(branch) = req.git_branch {
+                    pinned.retain(|p| p.git_branch.is_none() || p.git_branch.as_deref() == Some(branch.as_str()));
+                }
                 let data = serde_json::to_string(&pinned).unwrap_or_default();
                 Ok(ServerResult::from(CallToolResult::text_content(vec![
                     data.into(),