feat: vendor permission system source

pi-permission-system/test/permission-prompts.test.ts

@@ -0,0 +1,46 @@
+import { describe, expect, test } from "vitest";
+import {
+  formatMissingToolNameReason,
+  formatUnknownToolReason,
+} from "#src/permission-prompts";
+
+describe("formatMissingToolNameReason", () => {
+  test("mentions missing tool name and pi.getAllTools()", () => {
+    const result = formatMissingToolNameReason();
+    expect(result).toContain("no tool name");
+    expect(result).toContain("pi.getAllTools()");
+  });
+});
+
+describe("formatUnknownToolReason", () => {
+  test("mentions the unknown tool name and lists available tools", () => {
+    const result = formatUnknownToolReason("phantom", ["read", "write"]);
+    expect(result).toContain("phantom");
+    expect(result).toContain("read");
+    expect(result).toContain("write");
+  });
+
+  test("includes MCP hint for non-mcp tool names", () => {
+    const result = formatUnknownToolReason("my-server:tool", ["mcp"]);
+    expect(result).toContain("mcp");
+  });
+
+  test("omits MCP hint when tool name is 'mcp'", () => {
+    const result = formatUnknownToolReason("mcp", []);
+    expect(result).not.toContain("call the registered 'mcp' tool");
+  });
+
+  test("shows 'none' when no tools are registered", () => {
+    const result = formatUnknownToolReason("ghost", []);
+    expect(result).toContain("none");
+  });
+
+  test("caps preview at 10 tools and appends ellipsis for longer lists", () => {
+    const tools = Array.from({ length: 15 }, (_, i) => `tool${i}`);
+    const result = formatUnknownToolReason("ghost", tools);
+    expect(result).toContain("...");
+  });
+});
+
+// Skill denial text is now a render over the prompt payload.
+// Its behavior is tested in presentation/agent-renderer.test.ts.