fix(tui): seed context window on startup

.loopal/memory-events/2026-08-07_86a4020a.jsonl

@@ -0,0 +1,2 @@
+{"v":1,"ts":1786096118670,"sid":"86a4020a-9f73-4911-a98d-9327f03f49f4","type":"query_event","qid":"q-1786096118670618000","anchor":["archived-project-decisions"],"result_count":1,"latency_ms":0,"caller":"recall"}
+{"v":1,"ts":1786096118671,"sid":"86a4020a-9f73-4911-a98d-9327f03f49f4","type":"recall_hit","qid":"q-1786096118670618000","node":"archived-project-decisions","rank":0,"score":0.9925666,"source":"direct_hit"}

.loopal/memory/MEMORY.md

@@ -1,26 +1,17 @@
 ---
 generated_from: graph
-generated_at: 2026-08-04T14:16:51Z
+generated_at: 2026-08-07T09:47:57Z
 node_count: 1
 edge_count: 0
 ---
 
 # Memory Index
 
-## User
+## Recently added
+- 2026-08-04 [[archived-project-decisions]]
 
-_No entries._
+## Reference (high-relevance)
+- [[archived-project-decisions]] — Retain the Windows rules_rust PATH workaround until its upstream fix is verified; releases target four platforms and require Node.js-compatible actions; the hub defaults to 16 agents with MetaHub remote spawning
 
-## Feedback
-
-_No entries._
-
-## Project
-
-_No active entries._
-
-## Reference
-
-- 2026-08-04 [[archived-project-decisions]] — Preserve the verified release-platform, Windows rules_rust workaround, and agent-hub scaling decisions after their project memories expired.
 
 [Use memory_recall(query=...) to look up content. Do NOT Read individual .md files unless you are about to edit one.]

crates/loopal-runtime/src/agent_loop/cold_start_emit.rs

@@ -10,6 +10,15 @@ impl AgentLoopRunner {
             model: self.params.config.model(),
         })
         .await?;
+        self.emit(AgentEventPayload::TokenUsage {
+            input_tokens: 0,
+            output_tokens: 0,
+            context_window: self.turns.view().budget().context_window,
+            cache_creation_input_tokens: 0,
+            cache_read_input_tokens: 0,
+            thinking_tokens: 0,
+        })
+        .await?;
         self.emit(AgentEventPayload::ModeChanged {
             mode: self.params.config.mode.as_str().to_string(),
         })

crates/loopal-tui/tests/suite/e2e_control_lifecycle_test.rs

@@ -48,9 +48,17 @@ async fn test_cold_start_emits_initial_observable_seed() {
     let has_thinking = evts
         .iter()
         .any(|e| matches!(e, AgentEventPayload::ThinkingChanged { .. }));
+    let seeded_context_window = evts.iter().find_map(|e| match e {
+        AgentEventPayload::TokenUsage { context_window, .. } => Some(*context_window),
+        _ => None,
+    });
     assert!(has_model_changed, "cold-start must emit ModelChanged");
     assert!(has_mode_changed, "cold-start must emit ModeChanged");
     assert!(has_thinking, "cold-start must emit ThinkingChanged");
+    assert!(
+        seeded_context_window.is_some_and(|window| window > 0),
+        "cold-start must seed the selected model's context window"
+    );
 
     let obs = harness.app.observable_for("main");
     assert!(
@@ -66,6 +74,13 @@ async fn test_cold_start_emits_initial_observable_seed() {
         !obs.thinking_config.is_empty(),
         "observable.thinking_config must be seeded by cold-start"
     );
+    assert_eq!(
+        harness
+            .app
+            .with_active_conversation(|conv| conv.context_window),
+        seeded_context_window.unwrap(),
+        "cold-start context window event must reach the active conversation"
+    );
 }
 
 #[tokio::test]

crates/loopal-tui/tests/suite/e2e_system_test.rs

@@ -17,9 +17,16 @@ async fn test_event_ordering() {
     let stream = evts
         .iter()
         .position(|e| matches!(e, AgentEventPayload::Stream { .. }));
-    let usage = evts
-        .iter()
-        .position(|e| matches!(e, AgentEventPayload::TokenUsage { .. }));
+    let usage = evts.iter().position(|e| {
+        matches!(
+            e,
+            AgentEventPayload::TokenUsage {
+                input_tokens,
+                output_tokens,
+                ..
+            } if *input_tokens > 0 || *output_tokens > 0
+        )
+    });
     let terminal = evts.iter().position(|e| {
         matches!(
             e,