Keep getting "websocket closed by server before response.completed"

[hiphamster]

What version of Codex CLI is running?

codex-cli 0.139.0

What subscription do you have?

Pro

Which model were you using?

gpt-5.5 medium

What platform is your computer?

Darwin 25.3.0 arm64 arm

What terminal emulator and version are you using (if applicable)?

tmux iTerm2

Codex doctor report

{
  "schemaVersion": 1,
  "generatedAt": "1781381192s since unix epoch",
  "overallStatus": "ok",
  "codexVersion": "0.139.0",
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      "id": "app_server.status",
      "category": "app-server",
      "status": "ok",
      "summary": "background server is not running",
      "details": {
        "control socket": "/Users/********/.codex/app-server-control/app-server-control.sock",
        "daemon state dir": "/Users/********/.codex/app-server-daemon",
        "mode": "ephemeral",
        "pid file": "/Users/********/.codex/app-server-daemon/app-server.pid (missing)",
        "settings": "/Users/********/.codex/app-server-daemon/settings.json (missing)",
        "status": "not running",
        "update-loop pid file": "/Users/********/.codex/app-server-daemon/app-server-updater.pid (missing)"
      },
      "remediation": null,
      "durationMs": 0
    },
    "auth.credentials": {
      "id": "auth.credentials",
      "category": "auth",
      "status": "ok",
      "summary": "auth is configured",
      "details": {
        "auth file": "/Users/********/.codex/auth.json",
        "auth storage mode": "File",
        "stored API key": "false",
        "stored ChatGPT tokens": "true",
        "stored agent identity": "false",
        "stored auth mode": "chatgpt"
      },
      "remediation": null,
      "durationMs": 0
    },
    "config.load": {
      "id": "config.load",
      "category": "config",
      "status": "ok",
      "summary": "config loaded",
      "details": {
        "CODEX_HOME": "/Users/********/.codex",
        "config.toml": "/Users/********/.codex/config.toml",
        "config.toml parse": "ok",
        "cwd": "/Users/********/src/XXXXXXX-production-planning",
        "enabled feature flags": "shell_tool, unified_exec, shell_snapshot, terminal_resize_reflow, sqlite, hooks, enable_request_compression, multi_agent, apps, tool_suggest, plugins, in_app_browser, browser_use, browser_use_external, computer_use, plugin_sharing, image_generation, skill_mcp_dependency_install, steer, guardian_approval, goals, collaboration_modes, tool_call_mcp_elicitation, personality, fast_mode, tui_app_server, workspace_dependencies",
        "feature flag overrides": "none",
        "feature flags enabled": "27",
        "log dir": "/Users/********/.codex/log",
        "mcp servers": "0",
        "model": "gpt-5.5",
        "model provider": "openai",
        "sqlite home": "/Users/********/.codex"
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      "remediation": null,
      "durationMs": 0
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    "git.environment": {
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      "category": "git",
      "status": "ok",
      "summary": "git version 2.54.0",
      "details": {
        ".git entry": "file -> /Users/********/src/XXXXXXX/.git/worktrees/XXXXXXX-production-planning",
        "PATH git #1": "/opt/local/bin/git",
        "PATH git #2": "/usr/bin/git",
        "PATH git entries": "2",
        "git branch": "feature/production-inventory-planning",
        "git build options": "git version 2.54.0; cpu: arm64; no commit associated with this build; sizeof-long: 8; sizeof-size_t: 8; shell-path: /bin/sh; rust: disabled; feature: fsmonitor--daemon; gettext: enabled; libcurl: 8.19.0; zlib: 1.3.2; SHA-1: SHA1_DC; SHA-256: SHA256_BLK; default-ref-format: files; default-hash: sha1",
        "git exec path": "/opt/local/libexec/git-core",
        "git version": "git version 2.54.0",
        "repo detected": "true",
        "repo root": "/Users/********/src/XXXXXXX-production-planning",
        "selected git": "/opt/local/bin/git"
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      "remediation": null,
      "durationMs": 10
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    "installation": {
      "id": "installation",
      "category": "install",
      "status": "ok",
      "summary": "installation looks consistent",
      "details": {
        "PATH codex #1": "/Users/********/bin/codex",
        "current executable": "/Users/********/bin/codex",
        "install context": "other",
        "managed by bun": "false",
        "managed by npm": "false",
        "managed package root": "not set"
      },
      "remediation": null,
      "durationMs": 2
    },
    "mcp.config": {
      "id": "mcp.config",
      "category": "mcp",
      "status": "ok",
      "summary": "no MCP servers configured",
      "details": {},
      "remediation": null,
      "durationMs": 0
    },
    "network.env": {
      "id": "network.env",
      "category": "network",
      "status": "ok",
      "summary": "network-related environment looks readable",
      "details": {
        "proxy env vars": "none"
      },
      "remediation": null,
      "durationMs": 0
    },
    "network.provider_reachability": {
      "id": "network.provider_reachability",
      "category": "reachability",
      "status": "ok",
      "summary": "active provider endpoints are reachable over HTTP",
      "details": {
        "ChatGPT base URL": "https://chatgpt.com/backend-api/ reachable (HTTP 404)",
        "reachability mode": "ChatGPT auth"
      },
      "remediation": null,
      "durationMs": 295
    },
    "network.websocket_reachability": {
      "id": "network.websocket_reachability",
      "category": "websocket",
      "status": "ok",
      "summary": "Responses WebSocket handshake succeeded",
      "details": {
        "DNS": "2 IPv4, 2 IPv6, first IPv6",
        "auth mode": "chatgpt",
        "connect timeout": "15000 ms",
        "endpoint": "wss://chatgpt.com/backend-api/<redacted>",
        "handshake result": "HTTP 101 Switching Protocols",
        "model provider": "openai",
        "models etag present": "true",
        "provider name": "OpenAI",
        "proxy env vars": "none",
        "reasoning header": "false",
        "server model present": "false",
        "supports websockets": "true",
        "wire API": "responses"
      },
      "remediation": null,
      "durationMs": 683
    },
    "runtime.provenance": {
      "id": "runtime.provenance",
      "category": "runtime",
      "status": "ok",
      "summary": "running local build on macos-aarch64",
      "details": {
        "commit": "unknown",
        "current executable": "/Users/********/bin/codex",
        "install method": "other",
        "platform": "macos-aarch64",
        "version": "0.139.0"
      },
      "remediation": null,
      "durationMs": 0
    },
    "runtime.search": {
      "id": "runtime.search",
      "category": "search",
      "status": "ok",
      "summary": "search is OK (system)",
      "details": {
        "search command": "rg",
        "search command readiness": "ripgrep 15.1.0",
        "search provider": "system"
      },
      "remediation": null,
      "durationMs": 3
    },
    "sandbox.helpers": {
      "id": "sandbox.helpers",
      "category": "sandbox",
      "status": "ok",
      "summary": "sandbox configuration is readable",
      "details": {
        "approval policy": "OnRequest",
        "codex-linux-sandbox helper": "none",
        "execve wrapper helper": "/Users/********/.codex/tmp/arg0/codex-arg0HGc5di/codex-execve-wrapper",
        "filesystem sandbox": "restricted",
        "network sandbox": "restricted"
      },
      "remediation": null,
      "durationMs": 0
    },
    "state.paths": {
      "id": "state.paths",
      "category": "state",
      "status": "ok",
      "summary": "state paths and databases are inspectable",
      "details": {
        "CODEX_HOME": "/Users/********/.codex (dir)",
        "active rollout files": "35 files, 199135854 total bytes, 5689595 average bytes",
        "archived rollout files": "0 files, 0 total bytes, 0 average bytes",
        "goals DB": "/Users/********/.codex/goals_1.sqlite (file)",
        "goals DB integrity": "ok",
        "log DB": "/Users/********/.codex/logs_2.sqlite (file)",
        "log DB integrity": "ok",
        "log dir": "/Users/********/.codex/log (dir)",
        "memories DB": "/Users/********/.codex/memories_1.sqlite (file)",
        "memories DB integrity": "ok",
        "sqlite home": "/Users/********/.codex (dir)",
        "state DB": "/Users/********/.codex/state_5.sqlite (file)",
        "state DB integrity": "ok"
      },
      "remediation": null,
      "durationMs": 174
    },
    "state.rollout_db_parity": {
      "id": "state.rollout_db_parity",
      "category": "threads",
      "status": "ok",
      "summary": "rollout files and state DB thread inventory agree",
      "details": {
        "default model provider": "openai",
        "rollout DB active files": "35",
        "rollout DB active rows": "35",
        "rollout DB archive mismatches": "0",
        "rollout DB archived files": "0",
        "rollout DB archived rows": "0",
        "rollout DB duplicate DB paths": "0",
        "rollout DB duplicate rollout thread ids": "0",
        "rollout DB malformed file names": "0",
        "rollout DB missing active rows": "0",
        "rollout DB missing archived rows": "0",
        "rollout DB model providers": "openai=35",
        "rollout DB rows": "35",
        "rollout DB scan cap reached": "false",
        "rollout DB scan errors": "0",
        "rollout DB sources": "vscode=18, cli=7, subagent:other=5, subagent:thread_spawn=5",
        "rollout DB stale rows": "0"
      },
      "remediation": null,
      "durationMs": 872
    },
    "system.environment": {
      "id": "system.environment",
      "category": "system",
      "status": "ok",
      "summary": "OS language en-US",
      "details": {
        "EDITOR": "set",
        "LANG": "en_US.UTF-8",
        "LESS": "set",
        "PAGER": "set",
        "VISUAL": "set",
        "os": "Mac OS 26.3.1 [64-bit]",
        "os language": "en-US",
        "os type": "Mac OS",
        "os version": "26.3.1"
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      "remediation": null,
      "durationMs": 14
    },
    "terminal.env": {
      "id": "terminal.env",
      "category": "terminal",
      "status": "ok",
      "summary": "terminal metadata was detected",
      "details": {
        "COLORFGBG": "15;0",
        "COLORTERM": "truecolor",
        "TERM": "screen-256color",
        "TERMINFO_DIRS entry": [
          "/Applications/iTerm.app/Contents/Resources/terminfo (dir)",
          "/usr/share/terminfo (dir)"
        ],
        "TERM_PROGRAM": "iTerm2",
        "color output": "disabled (stdout is not a terminal)",
        "effective locale": "en_US.UTF-8",
        "multiplexer": "tmux 3.6a",
        "stderr is terminal": "true",
        "stdin is terminal": "true",
        "stdout is terminal": "false",
        "terminal": "iTerm2",
        "terminal size": "156x44",
        "terminal version": "3.6.8",
        "tmux allow-passthrough": "off",
        "tmux client termname": "screen-256color",
        "tmux client termtype": "iTerm2 3.6.8",
        "tmux extended-keys": "off",
        "tmux focus-events": "on",
        "tmux set-clipboard": "external",
        "tmux xterm-keys": "on"
      },
      "remediation": null,
      "durationMs": 45
    },
    "terminal.title": {
      "id": "terminal.title",
      "category": "title",
      "status": "ok",
      "summary": "terminal title default",
      "details": {
        "terminal title activity": "true",
        "terminal title items": "activity, project-name",
        "terminal title project source": "git repo root",
        "terminal title project value": "XXXXXXX-production...",
        "terminal title source": "default"
      },
      "remediation": null,
      "durationMs": 0
    },
    "updates.status": {
      "id": "updates.status",
      "category": "updates",
      "status": "ok",
      "summary": "update configuration is locally consistent",
      "details": {
        "cached latest version": "0.139.0",
        "check for update on startup": "true",
        "last checked at": "2026-06-13T03:19:22.865751Z",
        "latest version": "0.139.0",
        "latest version status": "current version is not older",
        "update action": "manual or unknown",
        "version cache": "/Users/********/.codex/version.json"
      },
      "remediation": null,
      "durationMs": 326
    }
  }
}

What issue are you seeing?

i had asked codex to regenerate a ui mockup, and it got stuck with "websocket closed by server before response.completed"

What steps can reproduce the bug?

Uploaded thread: 019ebf09-b52e-79a2-aeb7-c70ece56597f

What is the expected behavior?

A new ui mockup, with different sample data

Additional information

No response

[github-actions]

Potential duplicates detected. Please review them and close your issue if it is a duplicate.

• Stream disconnects before completion with repeated 5/5 reconnect failures #26696
• Latest Codex repeatedly reconnects in old sessions and cannot start follow-up tasks #26720
• Codex gets stuck in a pre-write context compaction loop on large projects, repeatedly re-reading instructions and never reaching file edits #27588
• Codex CLI cannot resume one existing thread: stream disconnected before completion with request IDs #27681
• Stream disconnected error #27675

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