diff --git a/apps/web/src/components/app/agent-surfaces/blocks/progress-block.test.tsx b/apps/web/src/components/app/agent-surfaces/blocks/progress-block.test.tsx
new file mode 100644
index 000000000..7d597a791
--- /dev/null
+++ b/apps/web/src/components/app/agent-surfaces/blocks/progress-block.test.tsx
@@ -0,0 +1,137 @@
+// @vitest-environment jsdom
+import { cleanup, render, screen } from "@testing-library/react";
+import { afterEach, describe, expect, it } from "vitest";
+
+import type { ProgressBlock } from "@/components/app/agent-surfaces/types";
+import { ProgressBlockView } from "./progress-block";
+
+afterEach(() => {
+  cleanup();
+});
+
+function block(overrides: Partial<ProgressBlock> = {}): ProgressBlock {
+  return {
+    id: "p1",
+    type: "progress",
+    value: 3,
+    max: 10,
+    ...overrides,
+  } as ProgressBlock;
+}
+
+describe("ProgressBlockView percent and clamping", () => {
+  it("computes percent from value/max and mirrors it on the ARIA range", () => {
+    render(<ProgressBlockView block={block({ value: 3, max: 10 })} />);
+
+    expect(screen.getByText("30%")).toBeTruthy();
+    const bar = screen.getByRole("progressbar");
+    expect(bar.getAttribute("aria-valuenow")).toBe("3");
+    expect(bar.getAttribute("aria-valuemax")).toBe("10");
+  });
+
+  it("clamps a negative value to 0 instead of going negative", () => {
+    render(<ProgressBlockView block={block({ value: -5, max: 10 })} />);
+
+    expect(screen.getByText("0%")).toBeTruthy();
+    expect(screen.getByRole("progressbar").getAttribute("aria-valuenow")).toBe(
+      "0"
+    );
+  });
+
+  it("clamps a value above max down to max instead of overshooting 100%", () => {
+    render(<ProgressBlockView block={block({ value: 25, max: 10 })} />);
+
+    expect(screen.getByText("100%")).toBeTruthy();
+    expect(screen.getByRole("progressbar").getAttribute("aria-valuenow")).toBe(
+      "10"
+    );
+  });
+
+  it("treats a non-positive max as 1 rather than dividing by zero", () => {
+    render(<ProgressBlockView block={block({ value: 0, max: 0 })} />);
+
+    expect(screen.getByText("0%")).toBeTruthy();
+    expect(screen.getByRole("progressbar").getAttribute("aria-valuemax")).toBe(
+      "1"
+    );
+  });
+
+  it("rounds a fractional percent to the nearest whole number", () => {
+    render(<ProgressBlockView block={block({ value: 2, max: 3 })} />);
+
+    // 2/3 = 66.66...% — rounds up to 67, where floor would give 66.
+    expect(screen.getByText("67%")).toBeTruthy();
+  });
+});
+
+describe("ProgressBlockView tone", () => {
+  it("gives a toned bar a different fill class than the neutral default", () => {
+    const { container: neutralContainer } = render(
+      <ProgressBlockView block={block({})} />
+    );
+    const neutralBar = neutralContainer.querySelector(
+      '[role="progressbar"] > div'
+    )!;
+    cleanup();
+
+    const { container: warningContainer } = render(
+      <ProgressBlockView block={block({ tone: "warning" })} />
+    );
+    const warningBar = warningContainer.querySelector(
+      '[role="progressbar"] > div'
+    )!;
+
+    expect(warningBar.className).not.toBe(neutralBar.className);
+  });
+});
+
+describe("ProgressBlockView label/title precedence", () => {
+  it("puts the title in the heading and the label on the progress line when both are set", () => {
+    render(
+      <ProgressBlockView
+        block={block({ title: "Deploy", label: "3 of 10 steps" })}
+      />
+    );
+
+    expect(screen.getByRole("heading", { name: "Deploy" })).toBeTruthy();
+    expect(screen.getByText("3 of 10 steps")).toBeTruthy();
+  });
+
+  it("falls back to the title on the progress line and renders no heading when there is no label", () => {
+    render(<ProgressBlockView block={block({ title: "Deploy" })} />);
+
+    expect(screen.queryByRole("heading")).toBeNull();
+    expect(screen.getByText("Deploy")).toBeTruthy();
+  });
+
+  it("falls back the ARIA label from label to title to a generic default", () => {
+    const { rerender } = render(
+      <ProgressBlockView
+        block={block({ title: "Deploy", label: "3 of 10 steps" })}
+      />
+    );
+    expect(screen.getByRole("progressbar").getAttribute("aria-label")).toBe(
+      "3 of 10 steps"
+    );
+
+    rerender(<ProgressBlockView block={block({ title: "Deploy" })} />);
+    expect(screen.getByRole("progressbar").getAttribute("aria-label")).toBe(
+      "Deploy"
+    );
+
+    rerender(<ProgressBlockView block={block({})} />);
+    expect(screen.getByRole("progressbar").getAttribute("aria-label")).toBe(
+      "Progress"
+    );
+  });
+
+  it("renders the detail markdown only when provided", () => {
+    const { rerender } = render(
+      <ProgressBlockView block={block({ detail: "Extra context." })} />
+    );
+    expect(screen.getByText("Extra context.")).toBeTruthy();
+
+    rerender(<ProgressBlockView block={block({})} />);
+    expect(screen.queryByText("Extra context.")).toBeNull();
+  });
+});
diff --git a/apps/web/src/components/app/agent-surfaces/blocks/slot-actions.test.tsx b/apps/web/src/components/app/agent-surfaces/blocks/slot-actions.test.tsx
new file mode 100644
index 000000000..25a1ab542
--- /dev/null
+++ b/apps/web/src/components/app/agent-surfaces/blocks/slot-actions.test.tsx
@@ -0,0 +1,227 @@
+// @vitest-environment jsdom
+import { cleanup, fireEvent, render, screen } from "@testing-library/react";
+import { afterEach, describe, expect, it, vi } from "vitest";
+
+import type { ActionRef } from "@/components/app/agent-surfaces/types";
+import {
+  indexInteractions,
+  type SurfaceInteractionIndex,
+} from "@/components/app/agent-surfaces/interaction-presentation";
+import { SlotActions } from "./slot-actions";
+
+const mutate = vi.fn();
+vi.mock("@/hooks/use-agent-surfaces", () => ({
+  makeIdempotencyKey: () => "idem-test",
+  useSubmitSurfaceInteraction: () => ({ mutate }),
+}));
+
+afterEach(() => {
+  cleanup();
+  mutate.mockReset();
+});
+
+function renderActions(
+  actions: ActionRef[],
+  overrides: {
+    interactions?: SurfaceInteractionIndex;
+    readOnly?: boolean;
+    surfaceRevision?: number;
+  } = {}
+) {
+  return render(
+    <SlotActions
+      blockId="footer"
+      actions={actions}
+      agentId="agt_test"
+      surfaceId="surface_test"
+      surfaceRevision={overrides.surfaceRevision ?? 1}
+      interactions={overrides.interactions ?? new Map()}
+      onRequestRefresh={async () => {}}
+      readOnly={overrides.readOnly ?? false}
+      idPrefix="test"
+    />
+  );
+}
+
+// Buttons that submit an action (main or plain, not the menu trigger) all
+// carry data-action-id — the menu trigger itself does not.
+function actionButtonIds(): string[] {
+  return Array.from(document.querySelectorAll("[data-action-id]")).map(
+    (el) => el.getAttribute("data-action-id")!
+  );
+}
+
+describe("SlotActions main-action selection", () => {
+  it("renders a single action as a plain button with no overflow menu", () => {
+    renderActions([{ id: "go", label: "Go", intent: "go" }]);
+
+    expect(screen.getByRole("button", { name: "Go" })).toBeTruthy();
+    expect(screen.queryByRole("button", { name: "More actions" })).toBeNull();
+  });
+
+  it("keeps authored order for two non-destructive actions with no primary", () => {
+    renderActions([
+      { id: "a", label: "A", intent: "a" },
+      { id: "b", label: "B", intent: "b" },
+    ]);
+
+    expect(actionButtonIds()).toEqual(["a", "b"]);
+    expect(screen.queryByRole("button", { name: "More actions" })).toBeNull();
+  });
+
+  it("promotes a primary-styled action to the front regardless of authored order", () => {
+    renderActions([
+      { id: "a", label: "A", intent: "a" },
+      { id: "b", label: "B", intent: "b", style: "primary" },
+    ]);
+
+    // b is primary, so it becomes `main` and renders first even though it
+    // was authored second.
+    expect(actionButtonIds()).toEqual(["b", "a"]);
+  });
+
+  it("falls back to the first action when every action is destructive", () => {
+    renderActions([
+      { id: "a", label: "Delete", intent: "delete", style: "destructive" },
+    ]);
+
+    // A single action never needs a menu, even when destructive.
+    expect(screen.getByRole("button", { name: "Delete" })).toBeTruthy();
+    expect(screen.queryByRole("button", { name: "More actions" })).toBeNull();
+  });
+
+  it("picks the first non-destructive action as main even when authored after a destructive one", () => {
+    renderActions([
+      { id: "del", label: "Delete", intent: "delete", style: "destructive" },
+      { id: "save", label: "Save", intent: "save" },
+    ]);
+
+    expect(actionButtonIds()).toEqual(["save"]);
+    expect(screen.getByRole("button", { name: "Save" })).toBeTruthy();
+    expect(screen.getByRole("button", { name: "More actions" })).toBeTruthy();
+    expect(screen.queryByRole("button", { name: "Delete" })).toBeNull();
+  });
+});
+
+describe("SlotActions overflow menu", () => {
+  it("opens a menu once there is more than one non-main action", () => {
+    renderActions([
+      { id: "a", label: "Save", intent: "save" },
+      { id: "b", label: "Retry", intent: "retry" },
+      { id: "c", label: "Archive", intent: "archive" },
+    ]);
+
+    expect(screen.getByRole("button", { name: "More actions" })).toBeTruthy();
+    expect(actionButtonIds()).toEqual(["a"]);
+  });
+});
+
+describe("SlotActions confirm flow", () => {
+  const confirmAction: ActionRef = {
+    id: "delete",
+    label: "Delete",
+    intent: "delete",
+    confirm: { title: "Delete this?", description: "This can't be undone." },
+  };
+
+  it("opens the confirm dialog instead of submitting immediately", () => {
+    renderActions([confirmAction]);
+
+    fireEvent.click(screen.getByRole("button", { name: "Delete" }));
+
+    expect(screen.getByText("Delete this?")).toBeTruthy();
+    expect(screen.getByText("This can't be undone.")).toBeTruthy();
+    expect(mutate).not.toHaveBeenCalled();
+  });
+
+  it("does not submit when the confirm dialog is cancelled", () => {
+    renderActions([confirmAction]);
+
+    fireEvent.click(screen.getByRole("button", { name: "Delete" }));
+    fireEvent.click(screen.getByRole("button", { name: "Cancel" }));
+
+    expect(mutate).not.toHaveBeenCalled();
+    expect(screen.queryByText("Delete this?")).toBeNull();
+  });
+
+  it("submits with the slot's blockId and baseRevision once confirmed", () => {
+    renderActions([confirmAction], { surfaceRevision: 7 });
+
+    fireEvent.click(screen.getByRole("button", { name: "Delete" }));
+    fireEvent.click(screen.getByRole("button", { name: "Confirm" }));
+
+    expect(mutate).toHaveBeenCalledWith(
+      expect.objectContaining({
+        kind: "action",
+        blockId: "footer",
+        actionId: "delete",
+        baseRevision: 7,
+      }),
+      expect.any(Object)
+    );
+    expect(screen.queryByText("Delete this?")).toBeNull();
+  });
+
+  it("submits immediately for an action with no confirm", () => {
+    renderActions([{ id: "go", label: "Go", intent: "go" }]);
+
+    fireEvent.click(screen.getByRole("button", { name: "Go" }));
+
+    expect(mutate).toHaveBeenCalledWith(
+      expect.objectContaining({ actionId: "go" }),
+      expect.any(Object)
+    );
+  });
+});
+
+describe("SlotActions readOnly and durable state", () => {
+  it("renders the main action natively disabled when the slot is read-only", () => {
+    renderActions([{ id: "go", label: "Go", intent: "go" }], {
+      readOnly: true,
+    });
+
+    expect(
+      screen.getByRole("button", { name: "Go" }).hasAttribute("disabled")
+    ).toBe(true);
+  });
+
+  it("shows the pending caption and locks the button for a claimed durable action", () => {
+    const interactions = indexInteractions([
+      {
+        id: "ix_1",
+        tabRevision: 1,
+        blockId: "footer",
+        actionId: "go",
+        kind: "action",
+        status: "claimed",
+        createdAt: "2026-01-01T00:00:00.000Z",
+      },
+    ]);
+    renderActions([{ id: "go", label: "Go", intent: "go" }], { interactions });
+
+    expect(
+      screen.getByRole("button", { name: "Go" }).hasAttribute("disabled")
+    ).toBe(true);
+    expect(
+      screen.getByTestId("interaction-status-caption").textContent
+    ).toContain("In progress");
+  });
+
+  it("shows the authored disabledReason for a disabled action with no interaction to report", () => {
+    renderActions([
+      {
+        id: "go",
+        label: "Go",
+        intent: "go",
+        disabled: true,
+        disabledReason: "Waiting on approval",
+      },
+    ]);
+
+    expect(screen.getByText("Waiting on approval")).toBeTruthy();
+    // Authored-disabled stays focusable (aria-disabled), unlike a native lock.
+    const button = screen.getByRole("button", { name: "Go" });
+    expect(button.hasAttribute("disabled")).toBe(false);
+    expect(button.getAttribute("aria-disabled")).toBe("true");
+  });
+});