diff --git a/.changeset/uncropped-workspace-menu.md b/.changeset/uncropped-workspace-menu.md
new file mode 100644
index 0000000..725f7b7
--- /dev/null
+++ b/.changeset/uncropped-workspace-menu.md
@@ -0,0 +1,5 @@
+---
+"@jmfederico/pi-web": patch
+---
+
+Allow sidebar action/detail menus to expand beyond their list section when only a few rows are shown.
diff --git a/src/client/src/components/MachineList.ts b/src/client/src/components/MachineList.ts
index b9aaec1..e2dc81c 100644
--- a/src/client/src/components/MachineList.ts
+++ b/src/client/src/components/MachineList.ts
@@ -124,7 +124,7 @@ export class MachineList extends LitElement implements KeyboardNavigableSection
       this.openMenuMachineId = undefined;
       return;
     }
-    this.menuStyle = actionMenuPanelStyle(target);
+    this.menuStyle = actionMenuPanelStyle(target, { constrainTo: "viewport" });
     this.openMenuMachineId = machineId;
   }
 
diff --git a/src/client/src/components/ProjectList.ts b/src/client/src/components/ProjectList.ts
index 80b492d..d7f7408 100644
--- a/src/client/src/components/ProjectList.ts
+++ b/src/client/src/components/ProjectList.ts
@@ -109,7 +109,7 @@ export class ProjectList extends LitElement implements KeyboardNavigableSection
       this.openMenuProjectId = undefined;
       return;
     }
-    this.menuStyle = actionMenuPanelStyle(target);
+    this.menuStyle = actionMenuPanelStyle(target, { constrainTo: "viewport" });
     this.openMenuProjectId = projectId;
   }
 
diff --git a/src/client/src/components/SessionList.ts b/src/client/src/components/SessionList.ts
index fa3adf4..04132fb 100644
--- a/src/client/src/components/SessionList.ts
+++ b/src/client/src/components/SessionList.ts
@@ -336,7 +336,7 @@ export class SessionList extends LitElement implements KeyboardNavigableSection
       this.openMenuSessionId = undefined;
       return;
     }
-    this.menuStyle = actionMenuPanelStyle(target);
+    this.menuStyle = actionMenuPanelStyle(target, { constrainTo: "viewport" });
     this.openMenuSessionId = sessionId;
   }
 
diff --git a/src/client/src/components/WorkspaceList.ts b/src/client/src/components/WorkspaceList.ts
index 6844c4d..2565873 100644
--- a/src/client/src/components/WorkspaceList.ts
+++ b/src/client/src/components/WorkspaceList.ts
@@ -180,7 +180,7 @@ export class WorkspaceList extends LitElement implements KeyboardNavigableSectio
       this.openMenuWorkspaceId = undefined;
       return;
     }
-    this.menuStyle = actionMenuPanelStyle(target);
+    this.menuStyle = actionMenuPanelStyle(target, { constrainTo: "viewport" });
     this.openMenuWorkspaceId = workspaceId;
   }
 
diff --git a/src/server/sessions/piSessionService.test.ts b/src/server/sessions/piSessionService.test.ts
index a6c600f..a73c808 100644
--- a/src/server/sessions/piSessionService.test.ts
+++ b/src/server/sessions/piSessionService.test.ts
@@ -632,7 +632,7 @@ describe("PiSessionService", () => {
   it("refreshes auth state and dedupes warnings when logout removes the current model's credentials", async () => {
     const hub = new CapturingSessionEventHub();
     const authStorage = AuthStorage.inMemory({ anthropic: { type: "api_key", key: "sk-test" } });
-    const modelRegistry = ModelRegistry.create(authStorage);
+    const modelRegistry = ModelRegistry.inMemory(authStorage);
     const model = modelRegistry.find("anthropic", "claude-3-5-sonnet-20241022");
     if (model === undefined) throw new Error("Expected Anthropic model fixture");
     const fake = fakeRuntime("auth-session", { model, modelRegistry });