Add SDK usage examples

12 examples showing increasing levels of customization:
- 01-minimal: all defaults
- 02-custom-model: model and thinking level
- 03-custom-prompt: replace or modify prompt
- 04-skills: discover, filter, merge skills
- 05-tools: built-in tools, custom tools
- 06-hooks: logging, blocking, result modification
- 07-context-files: AGENTS.md files
- 08-slash-commands: file-based commands
- 09-api-keys-and-oauth: API key resolution, OAuth config
- 10-settings: compaction, retry, terminal settings
- 11-sessions: persistence options
- 12-full-control: replace everything

Also exports FileSlashCommand type from index.ts

packages/coding-agent/examples/sdk/10-settings.ts

@@ -0,0 +1,33 @@
+/**
+ * Settings Configuration
+ *
+ * Override settings from agentDir/settings.json.
+ */
+
+import { createAgentSession, loadSettings, SessionManager } from "../../src/index.js";
+
+// Load current settings
+const settings = loadSettings();
+console.log("Current settings:", JSON.stringify(settings, null, 2));
+
+// Override specific settings
+const { session } = await createAgentSession({
+	settings: {
+		// Disable auto-compaction
+		compaction: { enabled: false },
+
+		// Custom retry behavior
+		retry: {
+			enabled: true,
+			maxRetries: 5,
+			baseDelayMs: 1000,
+		},
+
+		// Terminal options
+		terminal: { showImages: true },
+		hideThinkingBlock: true,
+	},
+	sessionManager: SessionManager.inMemory(),
+});
+
+console.log("Session created with custom settings");