Added official file support

package.json

@@ -1,6 +1,6 @@
 {
 	"name": "@ztimson/ai-utils",
-	"version": "1.6.0",
+	"version": "1.6.2",
 	"description": "AI Utility library",
 	"author": "Zak Timson",
 	"license": "MIT",

src/llm.ts

@@ -50,6 +50,8 @@ export type LLMMessage = {
 	role: 'assistant' | 'system' | 'user';
 	/** Message content */
 	content: string | any;
+	/** Files attached to request */
+	files?: LLMFile[];
 	/** Timestamp */
 	timestamp?: number;
 	/** Response duration in ms */
@@ -241,10 +243,8 @@ class LLM {
 			} else if(isText) {
 				text = (await this.loadBuffer(file, true)).toString('utf-8');
 			} else {
-				text = `Unsupported file type: ${ext || mime}`;
+				text = typeof file.content === 'string' ? file.content : `[Binary file, unable to extract: ${name}]`;
 			}
-
-			// Cache result, skip re-extraction on future turns of the same conversation
 			file.content = text;
 			file.extracted = true;
 			delete file.path;
@@ -411,7 +411,8 @@ ${a.system}`,
 			let tools: AiTool[] = options.tools || this.ai.options.llm?.tools || [];
 			const prompts: string[] = [];
 			let history = options.history || [];
-			if(message) history.push({role: 'user', content: message, timestamp: Date.now()});
+			const files = options.files || [];
+			if(message || files.length) history.push({role: 'user', content: message || '', timestamp: Date.now()});
 
 			// MCP
 			const mcp = options.mcp || this.ai.options?.llm?.mcp;
@@ -482,14 +483,16 @@ Linked: ${makeUnique([...r.links, ...r.backlinks]).join(', ')}
 
 			if(aborted) throw Object.assign(new Error('Aborted'), {name: 'AbortError'});
 
-			// Files
-			const files = options.files || [];
 			const lastMsg = history[history.length - 1];
-			const originalContent = lastMsg?.content;
-			if(files.length && lastMsg?.role === 'user') {
-				const {text, images} = await this.resolveFiles(files);
-				const merged = text ? `${originalContent}\n\n${text}` : originalContent;
-				lastMsg.content = images.length
+			if(files.length && lastMsg?.role === 'user') lastMsg.files = files;
+			const restores: {msg: LLMMessage, content: any}[] = [];
+			for(const msg of history) {
+				if(msg.role !== 'user' || !msg.files?.length) continue;
+				const {text, images} = await this.resolveFiles(msg.files);
+				if(!text && !images.length) continue;
+				restores.push({msg, content: msg.content});
+				const merged = text ? [msg.content, text].filter(Boolean).join('\n\n') : msg.content;
+				msg.content = images.length
 					? [...images.map(i => ({type: 'image', mime: i.mime, data: i.data})), {type: 'text', text: merged}]
 					: merged;
 			}
@@ -503,7 +506,8 @@ Linked: ${makeUnique([...r.links, ...r.backlinks]).join(', ')}
 			request = this.models[m].ask('', {...options, tools, system: prompts.filter(Boolean).join('\n\n')});
 			let resp = await request;
 
-			if(files.length && lastMsg?.role === 'user') lastMsg.content = originalContent;
+			// Strip the file injection shim
+			restores.forEach(({msg, content}) => msg.content = content);
 
 			// Capture meta (duration / tps)
 			for(const h of history) {