fix: load supported document attachments (#205)

src/channels/discord-attachments.ts

@@ -2,6 +2,7 @@ import fs from 'fs';
 import path from 'path';
 
 import { Attachment } from 'discord.js';
+import { isModelDocumentPath } from 'ejclaw-runners-shared';
 
 import { DATA_DIR } from '../config.js';
 import { logger } from '../logger.js';
@@ -63,6 +64,15 @@ function isTextAttachment(att: Attachment, contentType: string): boolean {
   );
 }
 
+function isStructuredDocumentAttachment(
+  att: Attachment,
+  contentType: string,
+): boolean {
+  if (contentType === 'application/pdf') return true;
+  if (contentType.startsWith('text/')) return true;
+  return isModelDocumentPath(att.name || '');
+}
+
 function formatAttachmentReference(
   label: 'Audio' | 'File' | 'Image' | 'Video',
   att: Attachment,
@@ -121,6 +131,9 @@ export async function describeDownloadedAttachment(
     attachmentDefaultExtension(contentType),
   );
   const reference = formatAttachmentReference(label, att, filePath);
+  if (label === 'File' && isStructuredDocumentAttachment(att, contentType)) {
+    if (!isTextAttachment(att, contentType)) return reference;
+  }
   if (!isTextAttachment(att, contentType)) {
     if (label === 'Image') return reference;
     return formatUnavailableAttachmentReference(

src/channels/discord.test.ts

@@ -681,7 +681,7 @@ describe('attachments', () => {
     );
   });
 
-  it('stores file attachment with a visible unsupported marker', async () => {
+  it('stores PDF file attachment as a structured document reference', async () => {
     const opts = createTestOpts();
     const channel = new DiscordChannel('test-token', opts);
     await channel.connect();
@@ -707,9 +707,7 @@ describe('attachments', () => {
     expect(opts.onMessage).toHaveBeenCalledWith(
       'dc:1234567890123456',
       expect.objectContaining({
-        content: expect.stringMatching(
-          /^\[File unavailable: report\.pdf → .+\.pdf — application\/pdf is not loaded as structured model input\]$/,
-        ),
+        content: expect.stringMatching(/^\[File: report\.pdf → .+\.pdf\]$/),
       }),
     );
   });

src/message-runtime-prompts.test.ts

@@ -170,7 +170,7 @@ describe('message-runtime-prompts output-only context', () => {
     );
   });
 
-  it('makes non-image turn attachments visibly unavailable instead of implying inspection', () => {
+  it('carries supported document turn attachments into reviewer prompts as file inputs', () => {
     const prompt = buildReviewerPendingPrompt({
       chatJid: 'group@test',
       timezone: 'UTC',
@@ -192,9 +192,7 @@ describe('message-runtime-prompts output-only context', () => {
       taskCreatedAt: '2026-04-20T01:00:00.000Z',
     });
 
-    expect(prompt).toContain(
-      '[Attachment unavailable: report.pdf → /tmp/report.pdf — application/pdf is not loaded as structured model input]',
-    );
+    expect(prompt).toContain('[File: report.pdf → /tmp/report.pdf]');
   });
 
   it('includes current task user scope in reviewer pending prompts without pulling older human messages', () => {

src/message-runtime-prompts.ts

@@ -1,3 +1,5 @@
+import { isModelDocumentPath } from 'ejclaw-runners-shared';
+
 import { buildArbiterContextPrompt } from './arbiter-context.js';
 import { TASK_USER_CONTEXT_START_SKEW_MS } from './message-runtime-task-context.js';
 import { formatMessages } from './router.js';
@@ -21,6 +23,12 @@ function isImageAttachment(attachment: OutboundAttachment): boolean {
   return /\.(?:png|jpe?g|gif|webp|bmp)$/i.test(attachment.path);
 }
 
+function isDocumentAttachment(attachment: OutboundAttachment): boolean {
+  const mime = attachment.mime?.toLowerCase();
+  if (mime === 'application/pdf' || mime?.startsWith('text/')) return true;
+  return isModelDocumentPath(attachment.path);
+}
+
 function attachmentLabel(attachment: OutboundAttachment): string {
   return attachment.name?.trim() || attachment.path.split('/').at(-1) || 'file';
 }
@@ -39,11 +47,15 @@ function formatTurnOutputAttachmentContext(
   if (!attachments?.length) return '';
   const lines = attachments.map((attachment) => {
     const label = attachmentLabel(attachment);
-    return isImageAttachment(attachment)
-      ? `[Image: ${label} → ${attachment.path}]`
-      : `[Attachment unavailable: ${label} → ${attachment.path} — ${nonImageAttachmentReason(
-          attachment,
-        )}]`;
+    if (isImageAttachment(attachment)) {
+      return `[Image: ${label} → ${attachment.path}]`;
+    }
+    if (isDocumentAttachment(attachment)) {
+      return `[File: ${label} → ${attachment.path}]`;
+    }
+    return `[Attachment unavailable: ${label} → ${attachment.path} — ${nonImageAttachmentReason(
+      attachment,
+    )}]`;
   });
   return `\n\nAttached evidence from this turn:\n${lines.join('\n')}`;
 }