refactor(cli): extract fish completion line builders

src/cli/completion-fish.test.ts

@@ -0,0 +1,48 @@
+import { describe, expect, it } from "vitest";
+import {
+  buildFishOptionCompletionLine,
+  buildFishSubcommandCompletionLine,
+  escapeFishDescription,
+} from "./completion-fish.js";
+
+describe("completion-fish helpers", () => {
+  it("escapes single quotes in descriptions", () => {
+    expect(escapeFishDescription("Bob's plugin")).toBe("Bob'\\''s plugin");
+  });
+
+  it("builds a subcommand completion line", () => {
+    const line = buildFishSubcommandCompletionLine({
+      rootCmd: "openclaw",
+      condition: "__fish_use_subcommand",
+      name: "plugins",
+      description: "Manage Bob's plugins",
+    });
+    expect(line).toBe(
+      `complete -c openclaw -n "__fish_use_subcommand" -a "plugins" -d 'Manage Bob'\\''s plugins'\n`,
+    );
+  });
+
+  it("builds option line with short and long flags", () => {
+    const line = buildFishOptionCompletionLine({
+      rootCmd: "openclaw",
+      condition: "__fish_use_subcommand",
+      flags: "-s, --shell <shell>",
+      description: "Shell target",
+    });
+    expect(line).toBe(
+      `complete -c openclaw -n "__fish_use_subcommand" -s s -l shell -d 'Shell target'\n`,
+    );
+  });
+
+  it("builds option line with long-only flags", () => {
+    const line = buildFishOptionCompletionLine({
+      rootCmd: "openclaw",
+      condition: "__fish_seen_subcommand_from completion",
+      flags: "--write-state",
+      description: "Write cache",
+    });
+    expect(line).toBe(
+      `complete -c openclaw -n "__fish_seen_subcommand_from completion" -l write-state -d 'Write cache'\n`,
+    );
+  });
+});