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[Bug] zai-web: attachment metadata is present, but files are missing in /home/z/my-project/upload #860
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Same bug here, still reproducing on Sep 29, 2026.
Adding my trace_ids for log lookup:trace_id: 1a0eb522f7412ad5
trace_id: 1a0eb57ea1fea859
trace_id: 1a0eb5ba2e73b151 (hola.txt, 5 bytes)
trace_id: 1a0eb608b9cbfcc1 (hola.txt retransmission, still missing)
trace_id: 1a0eb6b206553b75 (most recent turn)session_id: web-e4665e1f-40a2-45a7-a6cc-ee7daee920d7
chat_id: b3bc61b4-680a-44eb-9c78-e5e27f64d5a4
channel: zai-webReproduction identical to OP. The agent receives
"file_name: " + "Storage location: /home/z/my-project/upload/{file_name}"
but the file never appears in the sandbox filesystem.Same bug here, still reproducing on Sep 29, 2026. Adding my trace_ids for log lookup:
trace_id: 1a0eb522f7412ad5 trace_id: 1a0eb57ea1fea859 trace_id: 1a0eb5ba2e73b151 (hola.txt, 5 bytes) trace_id: 1a0eb608b9cbfcc1 (hola.txt retransmission, still missing) trace_id: 1a0eb6b206553b75 (most recent turn)
session_id: web-e4665e1f-40a2-45a7-a6cc-ee7daee920d7 chat_id: b3bc61b4-680a-44eb-9c78-e5e27f64d5a4 channel: zai-web
Reproduction identical to OP. The agent receives "file_name: " + "Storage location: /home/z/my-project/upload/{file_name}" but the file never appears in the sandbox filesystem.
Thanks for confirming, good to know it's not an isolated case.
Reacted by Loidel Barrera Rodríguez
提交前确认 · Pre-submission checklist
问题类别 · Category
稳定性 / 崩溃 · Stability / Crash
涉及的 Agent 框架 · Agent framework
ZCode Agent（自研）
严重程度 · Severity
影响体验 · Major (功能可用但体验受损 / works but degraded)
复现频率 · Reproducibility
必现 · Always
问题描述 · Description
bug-report-attachments-zai-web.md
Attachments uploaded in the
zai-webchat are not delivered to the model container.The gateway metadata correctly lists the attachments (
file_name,Storage location: /home/z/my-project/upload/{file_name}), but the files are never physically written to the container filesystem. The target directory/home/z/my-project/upload/remains empty.This is a platform bug in the
zai-webgateway, not a model bug. Full report (with trace IDs, session IDs, environment details) is attached below / in the follow-up comment.Note: this report is filed against ZCode's feedback form because it is the only available escalation channel — the actual affected component is
zai-web.复现步骤 · Steps to reproduce
zai-webchat at z.ai (sessionweb-f0d0bc9e-f107-4e26-a105-62ca6e90df95, chate9cc761f-abd3-4ed0-a1aa-6dd67f6a7c9d)..txtfiles (e.g.1.png,Модуль 1 - транскрибация.txt,Модуль 1 Решение ПЗ - транскрибация.txt).ls -la /home/z/my-project/upload/— the directory is empty.file_nameandStorage location.期望表现 · Expected behavior
After sending an attachment in the
zai-webchat, the file should appear at/home/z/my-project/upload/{file_name}within the message processing time (synchronously or in a short async window). TheStorage locationmetadata should only be generated after a successful write to disk.实际表现 · Actual behavior
Metadata lists the attachments, but no files appear in
/home/z/my-project/upload/. A full-filesystem search (find / -type f \( -name "1.png" -o -iname "*транскрибация*" -o -iname "*Модуль*" \)) returns 0 matches. The directory is writable (drwxrwxrwx, ownerroot), so this is not a permissions issue — the bytes are simply never written.ZCode 版本 · ZCode version
N/A — not a ZCode issue. Affected component: zai-web (web chat).
设备 / 系统 / 浏览器 · Device / OS / Browser
Infinix Y3 Max/Windows 11/Edge
截图 / 录屏 / 日志 · Screenshots / Recordings / Logs
No response