{"version":"2.0.35","anchor":"file-size-limits-for-at-mentions","canonical_anchor":"file-size-limits-for-at-mentions","heading":"File Size Limits for At-Mentions","tier":null,"area":null,"scope":null,"heads_up":null,"url":"https:\/\/changelogs.core-directive.com\/v\/2.0.35\/e\/file-size-limits-for-at-mentions","release_url":"https:\/\/changelogs.core-directive.com\/v\/2.0.35","markdown":"### File Size Limits for At-Mentions\n\n**What:** Enforces a 256KB size limit when files are attached via at-mention (`@` symbol).\n\n**How it works:**\n\n`# If you try to attach a large file via at-mention: @\/path\/to\/large-file.log # Claude Code will now check the file size first and reject if > 256KB` **Details:**\n\n- Prevents accidental attachment of large log files, binaries, or data files that would waste tokens\n- Size check happens before file content is read, saving processing time\n- Logs telemetry event `tengu_attachment_file_too_large` with file size for monitoring\n- Regular Read tool usage (without at-mention) is unaffected and can still handle large files with offset\/limit parameters\n- **Evidence**: `npA() at line 481542`, `ob1() at line 313340` (size check at lines 313344-313349)"}