feat: make each plugin an npm workspace built by a termix-plugin CLI

plugins/ai/tests/backend/context.test.ts

@@ -0,0 +1,47 @@
+import { describe, expect, it } from "vitest";
+import { buildSystemPrompt } from "../../src/backend/context.js";
+
+const BASE = { hostCount: 3, allowReadOnlyCommands: false };
+
+describe("buildSystemPrompt", () => {
+  it("tells the assistant to stay inside what was asked", () => {
+    // Without these the assistant answered "what is running on this server"
+    // by also proposing a monitoring script and an automation nobody wanted.
+    const prompt = buildSystemPrompt(BASE);
+
+    expect(prompt).toContain("nothing beyond it");
+    expect(prompt).toMatch(/Read, then report\. Do not propose anything\./);
+    expect(prompt).toMatch(/no monitoring automations, no scripts/);
+    expect(prompt).toMatch(/One request means one proposal at most/);
+  });
+
+  it("states that it proposes rather than applies", () => {
+    const prompt = buildSystemPrompt(BASE);
+    expect(prompt).toContain("cannot change anything directly");
+    expect(prompt).toContain("Never claim you have done something");
+  });
+
+  it("never claims credential access", () => {
+    const prompt = buildSystemPrompt(BASE);
+    expect(prompt).toMatch(/no access to passwords, SSH keys, API keys/);
+  });
+
+  it("mentions read-only commands only when the user opted in", () => {
+    expect(buildSystemPrompt(BASE)).not.toMatch(/read-only diagnostic/);
+    expect(buildSystemPrompt({ ...BASE, allowReadOnlyCommands: true })).toMatch(
+      /read-only diagnostic/,
+    );
+  });
+
+  it("pluralises the host count", () => {
+    expect(buildSystemPrompt({ ...BASE, hostCount: 1 })).toContain("1 host ");
+    expect(buildSystemPrompt({ ...BASE, hostCount: 2 })).toContain("2 hosts");
+  });
+
+  it("includes the active tab only when there is one", () => {
+    expect(buildSystemPrompt(BASE)).not.toContain("currently looking at");
+    expect(buildSystemPrompt({ ...BASE, activeTab: "terminal" })).toContain(
+      "currently looking at: terminal",
+    );
+  });
+});