Agent: fail loud on cpu past full; group tools in grouped()

SandboxStatus::cpu asserts its share lies in 0..=1 and hands it to
Meter unclamped. ToolRegistry gathers kept tools by source through
grouped(), tested for first-seen order and repeated sources.

TASKS.md

@@ -282,3 +282,4 @@ Per-component lines live in `tasks/`. Tags there:
 | T24d | 1 | FAIL | at 280px eight thumbnails ran past the browser card; the artifact panel lost its title and its controls ran out of the box |
 | T24d | 2 | FAIL | Tab to a later thumbnail left the strip where it was, the focused frame and its ring clipped |
 | T24d | 3 | FAIL | reviewed by Claude Fable 5.1 max after codex ran out of quota: the shown thumbnail wore the focus color, so focus and choice looked alike; frames were forced to 16:10 and cropped, and a pointer's share missed its target. Fixed after the cap: the shown frame takes accent, and BrowserPreview and ComputerUseViewer take the host's ratio (test a_screen_takes_its_pictures_shape); no fourth review |
+| T24e | 1 | FAIL | cpu() clamped a share past 1 in silence; the registry's grouping by source had no test |

src/agent/environment.rs

@@ -92,6 +92,7 @@ impl SandboxStatus {
 
     /// The share of its processors in use, 0 to 1.
     pub fn cpu(mut self, share: f32) -> Self {
+        assert!((0.0..=1.0).contains(&share), "cpu {share} of 1");
         self.cpu = Some(share);
         self
     }
@@ -165,13 +166,10 @@ impl RenderOnce for SandboxStatus {
                             })),
                     ),
             )
-            .children(self.cpu.map(|share| {
-                Meter::new(
-                    (self.id.clone(), "cpu"),
-                    "Processors",
-                    share.clamp(0.0, 1.0),
-                )
-            }))
+            .children(
+                self.cpu
+                    .map(|share| Meter::new((self.id.clone(), "cpu"), "Processors", share)),
+            )
             .children(self.memory.map(|(used, limit)| {
                 Meter::new(
                     (self.id.clone(), "memory"),

src/agent/registry.rs

@@ -55,6 +55,19 @@ pub(crate) fn found(tools: &[RegisteredTool], query: &str) -> Vec<usize> {
         .collect()
 }
 
+/// The kept tools gathered by source, sources in the order they first appear.
+pub(crate) fn grouped(tools: &[RegisteredTool], kept: &[usize]) -> Vec<(SharedString, Vec<usize>)> {
+    let mut groups: Vec<(SharedString, Vec<usize>)> = Vec::new();
+    for &ix in kept {
+        let source = &tools[ix].source;
+        match groups.iter_mut().find(|(name, _)| name == source) {
+            Some((_, items)) => items.push(ix),
+            None => groups.push((source.clone(), vec![ix])),
+        }
+    }
+    groups
+}
+
 type OnAccess = Rc<dyn Fn(usize, ToolAccess, &mut Window, &mut App)>;
 
 /// Every tool the agent may call, grouped by where it comes from and found by the owner's query: each allowed, asked for first, or denied.
@@ -96,15 +109,7 @@ impl RenderOnce for ToolRegistry {
     fn render(self, _: &mut Window, cx: &mut App) -> impl IntoElement {
         let theme = cx.theme();
         let colors = theme.colors.clone();
-        let kept = found(&self.tools, &self.query);
-        let mut groups: Vec<(SharedString, Vec<usize>)> = Vec::new();
-        for ix in kept {
-            let source = &self.tools[ix].source;
-            match groups.iter_mut().find(|(name, _)| name == source) {
-                Some((_, items)) => items.push(ix),
-                None => groups.push((source.clone(), vec![ix])),
-            }
-        }
+        let groups = grouped(&self.tools, &found(&self.tools, &self.query));
         let empty = groups.is_empty();
         div()
             .w_full()
@@ -183,7 +188,9 @@ impl RenderOnce for ToolRegistry {
 
 #[cfg(test)]
 mod tests {
-    use super::{RegisteredTool, ToolAccess, found};
+    use gpui::SharedString;
+
+    use super::{RegisteredTool, ToolAccess, found, grouped};
 
     fn tool(name: &str, description: &str) -> RegisteredTool {
         RegisteredTool {
@@ -206,4 +213,19 @@ mod tests {
         assert_eq!(found(&tools, "writes file"), [1]);
         assert_eq!(found(&tools, "web file"), Vec::<usize>::new());
     }
+
+    #[test]
+    fn kept_tools_gather_by_source_in_first_seen_order() {
+        let from = |source: &str| RegisteredTool {
+            source: source.to_string().into(),
+            ..tool("tool", "")
+        };
+        let tools = [from("A"), from("B"), from("A")];
+        let (a, b) = (SharedString::from("A"), SharedString::from("B"));
+        assert_eq!(
+            grouped(&tools, &[0, 1, 2]),
+            [(a.clone(), vec![0, 2]), (b.clone(), vec![1])]
+        );
+        assert_eq!(grouped(&tools, &[1, 2]), [(b, vec![1]), (a, vec![2])]);
+    }
 }

src/agent/tests/environment.rs

@@ -168,3 +168,9 @@ fn every_checkpoint_but_the_current_rewinds(cx: &mut TestAppContext) {
 fn memory_past_its_limit_fails_loud() {
     let _ = SandboxStatus::new("box", "python", SandboxState::Ready).memory(5, 4);
 }
+
+#[test]
+#[should_panic(expected = "cpu 1.8 of 1")]
+fn cpu_past_full_fails_loud() {
+    let _ = SandboxStatus::new("box", "python", SandboxState::Ready).cpu(1.8);
+}