refactor(agents): dedupe config and truncation guards

src/shared/config-eval.test.ts

@@ -0,0 +1,53 @@
+import { describe, expect, it } from "vitest";
+import { evaluateRuntimeEligibility } from "./config-eval.js";
+
+describe("evaluateRuntimeEligibility", () => {
+  it("rejects entries when required OS does not match local or remote", () => {
+    const result = evaluateRuntimeEligibility({
+      os: ["definitely-not-a-runtime-platform"],
+      remotePlatforms: [],
+      hasBin: () => true,
+      hasEnv: () => true,
+      isConfigPathTruthy: () => true,
+    });
+    expect(result).toBe(false);
+  });
+
+  it("accepts entries when remote platform satisfies OS requirements", () => {
+    const result = evaluateRuntimeEligibility({
+      os: ["linux"],
+      remotePlatforms: ["linux"],
+      hasBin: () => true,
+      hasEnv: () => true,
+      isConfigPathTruthy: () => true,
+    });
+    expect(result).toBe(true);
+  });
+
+  it("bypasses runtime requirements when always=true", () => {
+    const result = evaluateRuntimeEligibility({
+      always: true,
+      requires: { env: ["OPENAI_API_KEY"] },
+      hasBin: () => false,
+      hasEnv: () => false,
+      isConfigPathTruthy: () => false,
+    });
+    expect(result).toBe(true);
+  });
+
+  it("evaluates runtime requirements when always is false", () => {
+    const result = evaluateRuntimeEligibility({
+      requires: {
+        bins: ["node"],
+        anyBins: ["bun", "node"],
+        env: ["OPENAI_API_KEY"],
+        config: ["browser.enabled"],
+      },
+      hasBin: (bin) => bin === "node",
+      hasAnyRemoteBin: () => false,
+      hasEnv: (name) => name === "OPENAI_API_KEY",
+      isConfigPathTruthy: (path) => path === "browser.enabled",
+    });
+    expect(result).toBe(true);
+  });
+});