fix(coding-agent): add tool promptGuidelines support fixes #1720

packages/coding-agent/test/system-prompt.test.ts

@@ -52,4 +52,28 @@ describe("buildSystemPrompt", () => {
 			expect(prompt).toContain("- dynamic_tool: Run dynamic test behavior");
 		});
 	});
+
+	describe("prompt guidelines", () => {
+		test("appends promptGuidelines to default guidelines", () => {
+			const prompt = buildSystemPrompt({
+				selectedTools: ["read", "dynamic_tool"],
+				promptGuidelines: ["Use dynamic_tool for project summaries."],
+				contextFiles: [],
+				skills: [],
+			});
+
+			expect(prompt).toContain("- Use dynamic_tool for project summaries.");
+		});
+
+		test("deduplicates and trims promptGuidelines", () => {
+			const prompt = buildSystemPrompt({
+				selectedTools: ["read", "dynamic_tool"],
+				promptGuidelines: ["Use dynamic_tool for summaries.", "  Use dynamic_tool for summaries.  ", "   "],
+				contextFiles: [],
+				skills: [],
+			});
+
+			expect(prompt.match(/- Use dynamic_tool for summaries\./g)).toHaveLength(1);
+		});
+	});
 });