feat(coding-agent): ResourceLoader, package management, and /reload command (#645)

- Add ResourceLoader interface and DefaultResourceLoader implementation
- Add PackageManager for npm/git extension sources with install/remove/update
- Add session.reload() and session.bindExtensions() APIs
- Add /reload command in interactive mode
- Add CLI flags: --skill, --theme, --prompt-template, --no-themes, --no-prompt-templates
- Add pi install/remove/update commands for extension management
- Refactor settings.json to use arrays for skills, prompts, themes
- Remove legacy SkillsSettings source flags and filters
- Update SDK examples and documentation for ResourceLoader pattern
- Add theme registration and loadThemeFromPath for dynamic themes
- Add getShellEnv to include bin dir in PATH for bash commands

packages/coding-agent/test/sdk-skills.test.ts

@@ -2,6 +2,8 @@ import { mkdirSync, rmSync, writeFileSync } from "node:fs";
 import { tmpdir } from "node:os";
 import { join } from "node:path";
 import { afterEach, beforeEach, describe, expect, it } from "vitest";
+import { createExtensionRuntime } from "../src/core/extensions/loader.js";
+import type { ResourceLoader } from "../src/core/resource-loader.js";
 import { createAgentSession } from "../src/core/sdk.js";
 import { SessionManager } from "../src/core/session-manager.js";
 
@@ -47,21 +49,30 @@ This is a test skill.
 		expect(session.skills.some((s) => s.name === "test-skill")).toBe(true);
 	});
 
-	it("should have empty skills when options.skills is empty array (--no-skills)", async () => {
+	it("should have empty skills when resource loader returns none (--no-skills)", async () => {
+		const resourceLoader: ResourceLoader = {
+			getExtensions: () => ({ extensions: [], errors: [], runtime: createExtensionRuntime() }),
+			getSkills: () => ({ skills: [], diagnostics: [] }),
+			getPrompts: () => ({ prompts: [], diagnostics: [] }),
+			getThemes: () => ({ themes: [], diagnostics: [] }),
+			getAgentsFiles: () => ({ agentsFiles: [] }),
+			getSystemPrompt: () => undefined,
+			getAppendSystemPrompt: () => [],
+			reload: async () => {},
+		};
+
 		const { session } = await createAgentSession({
 			cwd: tempDir,
 			agentDir: tempDir,
 			sessionManager: SessionManager.inMemory(),
-			skills: [], // Explicitly empty - like --no-skills
+			resourceLoader,
 		});
 
-		// session.skills should be empty
 		expect(session.skills).toEqual([]);
-		// No warnings since we didn't discover
 		expect(session.skillWarnings).toEqual([]);
 	});
 
-	it("should use provided skills when options.skills is explicitly set", async () => {
+	it("should use provided skills when resource loader supplies them", async () => {
 		const customSkill = {
 			name: "custom-skill",
 			description: "A custom skill",
@@ -70,16 +81,25 @@ This is a test skill.
 			source: "custom" as const,
 		};
 
+		const resourceLoader: ResourceLoader = {
+			getExtensions: () => ({ extensions: [], errors: [], runtime: createExtensionRuntime() }),
+			getSkills: () => ({ skills: [customSkill], diagnostics: [] }),
+			getPrompts: () => ({ prompts: [], diagnostics: [] }),
+			getThemes: () => ({ themes: [], diagnostics: [] }),
+			getAgentsFiles: () => ({ agentsFiles: [] }),
+			getSystemPrompt: () => undefined,
+			getAppendSystemPrompt: () => [],
+			reload: async () => {},
+		};
+
 		const { session } = await createAgentSession({
 			cwd: tempDir,
 			agentDir: tempDir,
 			sessionManager: SessionManager.inMemory(),
-			skills: [customSkill],
+			resourceLoader,
 		});
 
-		// session.skills should contain only the provided skill
 		expect(session.skills).toEqual([customSkill]);
-		// No warnings since we didn't discover
 		expect(session.skillWarnings).toEqual([]);
 	});
 });