refactor(ai): Add completion signal to onText/onThinking callbacks

- Update LLMOptions interface to include completion boolean parameter
- Modify all providers to signal when text/thinking blocks are complete
- Update examples to handle the completion parameter
- Move documentation files to docs/ directory

packages/ai/src/providers/anthropic.ts

@@ -114,15 +114,33 @@ export class AnthropicLLM implements LLM<AnthropicLLMOptions> {
 				},
 			);
 
+			let blockType: "text" | "thinking" | "other" = "other";
 			for await (const event of stream) {
+				if (event.type === "content_block_start") {
+					if (event.content_block.type === "text") {
+						blockType = "text";
+					} else if (event.content_block.type === "thinking") {
+						blockType = "thinking";
+					} else {
+						blockType = "other";
+					}
+				}
 				if (event.type === "content_block_delta") {
 					if (event.delta.type === "text_delta") {
-						options?.onText?.(event.delta.text);
+						options?.onText?.(event.delta.text, false);
 					}
 					if (event.delta.type === "thinking_delta") {
-						options?.onThinking?.(event.delta.thinking);
+						options?.onThinking?.(event.delta.thinking, false);
 					}
 				}
+				if (event.type === "content_block_stop") {
+					if (blockType === "text") {
+						options?.onText?.("", true);
+					} else if (blockType === "thinking") {
+						options?.onThinking?.("", true);
+					}
+					blockType = "other";
+				}
 			}
 			const msg = await stream.finalMessage();
 			const thinking = msg.content.some((block) => block.type === "thinking")

packages/ai/src/providers/openai-completions.ts

@@ -87,17 +87,24 @@ export class OpenAICompletionsLLM implements LLM<OpenAICompletionsLLMOptions> {
 			};
 			let finishReason: ChatCompletionChunk.Choice["finish_reason"] | null = null;
 
+			let inTextBlock = false;
 			for await (const chunk of stream) {
 				const choice = chunk.choices[0];
 
 				// Handle text content
 				if (choice?.delta?.content) {
 					content += choice.delta.content;
-					options?.onText?.(choice.delta.content);
+					options?.onText?.(choice.delta.content, false);
+					inTextBlock = true;
 				}
 
 				// Handle tool calls
 				if (choice?.delta?.tool_calls) {
+					if (inTextBlock) {
+						// If we were in a text block, signal its end
+						options?.onText?.("", true);
+						inTextBlock = false;
+					}
 					for (const toolCall of choice.delta.tool_calls) {
 						const index = toolCall.index;
 
@@ -120,6 +127,11 @@ export class OpenAICompletionsLLM implements LLM<OpenAICompletionsLLMOptions> {
 
 				// Capture finish reason
 				if (choice?.finish_reason) {
+					if (inTextBlock) {
+						// If we were in a text block, signal its end
+						options?.onText?.("", true);
+						inTextBlock = false;
+					}
 					finishReason = choice.finish_reason;
 				}
 

packages/ai/src/providers/openai-responses.ts

@@ -91,21 +91,23 @@ export class OpenAIResponsesLLM implements LLM<OpenAIResponsesLLMOptions> {
 				if (event.type === "response.reasoning_summary_text.delta") {
 					const delta = event.delta;
 					thinking += delta;
-					options?.onThinking?.(delta);
+					options?.onThinking?.(delta, false);
 				} else if (event.type === "response.reasoning_summary_text.done") {
 					if (event.text) {
 						thinking = event.text;
 					}
+					options?.onThinking?.("", true);
 				}
 				// Handle main text output
 				else if (event.type === "response.output_text.delta") {
 					const delta = event.delta;
 					content += delta;
-					options?.onText?.(delta);
+					options?.onText?.(delta, false);
 				} else if (event.type === "response.output_text.done") {
 					if (event.text) {
 						content = event.text;
 					}
+					options?.onText?.("", true);
 				}
 				// Handle function calls
 				else if (event.type === "response.output_item.done") {

packages/ai/src/types.ts

@@ -1,8 +1,8 @@
 export interface LLMOptions {
 	temperature?: number;
 	maxTokens?: number;
-	onText?: (text: string) => void;
+	onText?: (text: string, complete: boolean) => void;
-	onThinking?: (thinking: string) => void;
+	onThinking?: (thinking: string, complete: boolean) => void;
 	signal?: AbortSignal;
 }
 

packages/ai/test/examples/anthropic.ts

@@ -24,8 +24,8 @@ const tools: Tool[] = [
 ];
 
 const options: AnthropicLLMOptions = {
-    onText: (t) => process.stdout.write(t),
+    onText: (t, complete) => process.stdout.write(t + (complete ? "\n" : "")),
-    onThinking: (t) => process.stdout.write(chalk.dim(t)),
+    onThinking: (t, complete) => process.stdout.write(chalk.dim(t + (complete ? "\n" : ""))),
     thinking: { enabled: true }
 };
 const ai = new AnthropicLLM("claude-sonnet-4-0", process.env.ANTHROPIC_OAUTH_TOKEN ?? process.env.ANTHROPIC_API_KEY);

packages/ai/test/examples/openai-completions.ts

@@ -21,8 +21,8 @@ const tools: Tool[] = [
 ];
 
 const options: OpenAICompletionsLLMOptions = {
-    onText: (t) => process.stdout.write(t),
+    onText: (t, complete) => process.stdout.write(t + (complete ? "\n" : "")),
-    onThinking: (t) => process.stdout.write(chalk.dim(t)),
+    onThinking: (t, complete) => process.stdout.write(chalk.dim(t + (complete ? "\n" : ""))),
     reasoningEffort: "medium",
     toolChoice: "auto"
 };

packages/ai/test/examples/openai-responses.ts

@@ -32,8 +32,8 @@ const context: Context = {
 }
 
 const options: OpenAIResponsesLLMOptions = {
-    onText: (t) => process.stdout.write(t),
+    onText: (t, complete) => process.stdout.write(t + (complete ? "\n" : "")),
-    onThinking: (t) => process.stdout.write(chalk.dim(t)),
+    onThinking: (t, complete) => process.stdout.write(chalk.dim(t + (complete ? "\n" : ""))),
     reasoningEffort: "low",
     reasoningSummary: "auto"
 };