Cannot use multiple terminal sessions

Start by reproducing the failure with multiple Codex CLI sessions on Linux using version 0.147.0, then inspect the terminal and app-server behavior reported by the Codex doctor output. Done means multiple terminal sessions can run concurrently without preventing normal CLI use.

What version of Codex CLI is running?

codex-cli 0.147.0

What subscription do you have?

Pro

Which model were you using?

gpt-5.6-sol-max

What platform is your computer?

Linux 7.0.0-29-generic x86_64 unknown

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

multiple

Codex doctor report

{
  "schemaVersion": 1,
  "generatedAt": "1786173429s since unix epoch",
  "overallStatus": "ok",
  "codexVersion": "0.147.0",
  "checks": {
    "app_server.status": {
      "id": "app_server.status",
      "category": "app-server",
      "status": "ok",
      "summary": "background server is running",
      "details": {
        "app-server version": "0.147.0",
        "control socket": "/--/.codex/app-server-control/app-server-control.sock",
        "daemon state dir": "/--/.codex/app-server-daemon",
        "mode": "ephemeral",
        "pid file": "/--/.codex/app-server-daemon/app-server.pid (missing)",
        "settings": "/--/.codex/app-server-daemon/settings.json (missing)",
        "status": "running",
        "update-loop pid file": "/--/.codex/app-server-daemon/app-server-updater.pid (missing)"
      },
      "remediation": null,
      "durationMs": 168
    },
    "auth.credentials": {
      "id": "auth.credentials",
      "category": "auth",
      "status": "ok",
      "summary": "auth is configured",
      "details": {
        "auth file": "/--/.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": "/--/.codex",
        "config.toml": "/--/.codex/config.toml",
        "config.toml parse": "ok",
        "cwd": "/--",
        "enabled feature flags": "shell_tool, view_image, unified_exec, shell_snapshot, code_mode_host, terminal_resize_reflow, sqlite, hooks, enable_request_compression, multi_agent, apps, tool_search_always_defer_mcp_tools, tool_suggest, plugins, in_app_browser, in_app_updates, browser_use, browser_use_full_cdp_access, browser_use_external, computer_use, remote_plugin, plugin_sharing, image_generation, resize_all_images, item_ids, skill_mcp_dependency_install, skill_search, mentions_v2, steer, guardian_approval, goals, collaboration_modes, tool_call_mcp_elicitation, auth_elicitation, personality, fast_mode, tui_app_server, remote_compaction_v2, workspace_dependencies",
        "feature flag overrides": "none",
        "feature flags enabled": "39",
        "log dir": "/--/.codex/log",
        "mcp servers": "0",
        "model": "gpt-5.3-codex-spark",
        "model provider": "openai",
        "sqlite home": "/--/.codex"
      },
      "remediation": null,
      "durationMs": 0
    },
    "git.environment": {
      "id": "git.environment",
      "category": "git",
      "status": "ok",
      "summary": "git version 2.53.0",
      "details": {
        ".git entry": "directory",
        "PATH git #1": "/usr/bin/git",
        "PATH git #2": "/bin/git",
        "PATH git entries": "2",
        "git build options": "git version 2.53.0; cpu: x86_64; no commit associated with this build; sizeof-long: 8; sizeof-size_t: 8; shell-path: /bin/sh; rust: disabled; gettext: enabled; libcurl: 8.18.0; zlib: 1.3.1; SHA-1: SHA1_DC; SHA-256: SHA256_BLK; default-ref-format: files; default-hash: sha1",
        "git exec path": "/usr/lib/git-core",
        "git version": "git version 2.53.0",
        "repo detected": "true",
        "repo --": "/--",
        "selected git": "/usr/bin/git"
      },
      "remediation": null,
      "durationMs": 103
    },
    "installation": {
      "id": "installation",
      "category": "install",
      "status": "ok",
      "summary": "installation looks consistent",
      "details": {
        "PATH codex #1": "/--/.nvm/versions/node/v24.16.0/bin/codex",
        "current executable": "/--/.nvm/versions/node/v24.16.0/lib/node_modules/@openai/codex/node_modules/@openai/codex-linux-x64/vendor/x86_64-unknown-linux-musl/bin/codex",
        "install context": "npm (package /--/.nvm/versions/node/v24.16.0/lib/node_modules/@openai/codex/node_modules/@openai/codex-linux-x64/vendor/x86_64-unknown-linux-musl, bin /--/.nvm/versions/node/v24.16.0/lib/node_modules/@openai/codex/node_modules/@openai/codex-linux-x64/vendor/x86_64-unknown-linux-musl/bin, resources /--/.nvm/versions/node/v24.16.0/lib/node_modules/@openai/codex/node_modules/@openai/codex-linux-x64/vendor/x86_64-unknown-linux-musl/codex-resources, path /--/.nvm/versions/node/v24.16.0/lib/node_modules/@openai/codex/node_modules/@openai/codex-linux-x64/vendor/x86_64-unknown-linux-musl/codex-path)",
        "managed by bun": "false",
        "managed by npm": "true",
        "managed by pnpm": "false",
        "managed package --": "/--/.nvm/versions/node/v24.16.0/lib/node_modules/@openai/codex",
        "npm update target": "/--/.nvm/versions/node/v24.16.0/lib/node_modules/@openai/codex"
      },
      "remediation": null,
      "durationMs": 178
    },
    "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 403)",
        "reachability mode": "ChatGPT auth"
      },
      "remediation": null,
      "durationMs": 141
    },
    "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": 562
    },
    "runtime.provenance": {
      "id": "runtime.provenance",
      "category": "runtime",
      "status": "ok",
      "summary": "running npm on linux-x86_64",
      "details": {
        "commit": "unknown",
        "current executable": "/--/.nvm/versions/node/v24.16.0/lib/node_modules/@openai/codex/node_modules/@openai/codex-linux-x64/vendor/x86_64-unknown-linux-musl/bin/codex",
        "install method": "npm (package /--/.nvm/versions/node/v24.16.0/lib/node_modules/@openai/codex/node_modules/@openai/codex-linux-x64/vendor/x86_64-unknown-linux-musl, bin /--/.nvm/versions/node/v24.16.0/lib/node_modules/@openai/codex/node_modules/@openai/codex-linux-x64/vendor/x86_64-unknown-linux-musl/bin, resources /--/.nvm/versions/node/v24.16.0/lib/node_modules/@openai/codex/node_modules/@openai/codex-linux-x64/vendor/x86_64-unknown-linux-musl/codex-resources, path /--/.nvm/versions/node/v24.16.0/lib/node_modules/@openai/codex/node_modules/@openai/codex-linux-x64/vendor/x86_64-unknown-linux-musl/codex-path)",
        "platform": "linux-x86_64",
        "version": "0.147.0"
      },
      "remediation": null,
      "durationMs": 0
    },
    "runtime.search": {
      "id": "runtime.search",
      "category": "search",
      "status": "ok",
      "summary": "search is OK (bundled)",
      "details": {
        "search command": "/--/.nvm/versions/node/v24.16.0/lib/node_modules/@openai/codex/node_modules/@openai/codex-linux-x64/vendor/x86_64-unknown-linux-musl/codex-path/rg",
        "search command readiness": "file exists",
        "search provider": "bundled"
      },
      "remediation": null,
      "durationMs": 0
    },
    "sandbox.helpers": {
      "id": "sandbox.helpers",
      "category": "sandbox",
      "status": "ok",
      "summary": "sandbox configuration is readable",
      "details": {
        "approval policy": "OnRequest",
        "codex-linux-sandbox helper": "/--/.codex/tmp/arg0/codex-arg0hl2deM/codex-linux-sandbox",
        "execve wrapper helper": "/--/.codex/tmp/arg0/codex-arg0hl2deM/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": "/--/.codex (dir)",
        "active rollout files": "329 files, 3302742416 total bytes, 10038730 average bytes",
        "archived rollout files": "0 files, 0 total bytes, 0 average bytes",
        "goals DB": "/--/.codex/goals_1.sqlite (file)",
        "goals DB integrity": "ok",
        "log DB": "/--/.codex/logs_2.sqlite (file)",
        "log DB integrity": "ok",
        "log dir": "/--/.codex/log (dir)",
        "memories DB": "/--/.codex/memories_1.sqlite (file)",
        "memories DB integrity": "ok",
        "queue DB": "/--/.codex/queue_1.sqlite (file)",
        "queue DB integrity": "ok",
        "sqlite home": "/--/.codex (dir)",
        "state DB": "/--/.codex/state_5.sqlite (file)",
        "state DB integrity": "ok",
        "thread history DB": "/--/.codex/thread_history_1.sqlite (missing)",
        "thread history DB integrity": "skipped (missing)"
      },
      "remediation": null,
      "durationMs": 995
    },
    "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": "329",
        "rollout DB active rows": "329",
        "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=329",
        "rollout DB rows": "329",
        "rollout DB scan cap reached": "false",
        "rollout DB scan errors": "0",
        "rollout DB sources": "subagent:thread_spawn=202, cli=112, vscode=15",
        "rollout DB stale rows": "0"
      },
      "remediation": null,
      "durationMs": 412
    },
    "system.environment": {
      "id": "system.environment",
      "category": "system",
      "status": "ok",
      "summary": "OS language en-US",
      "details": {
        "EDITOR": "not set",
        "LANG": "en_US.UTF-8",
        "VISUAL": "not set",
        "os": "Ubuntu 26.4.0 (resolute) [64-bit]",
        "os language": "en-US",
        "os type": "Ubuntu",
        "os version": "26.4.0"
      },
      "remediation": null,
      "durationMs": 32
    },
    "terminal.env": {
      "id": "terminal.env",
      "category": "terminal",
      "status": "ok",
      "summary": "terminal metadata was detected",
      "details": {
        "SSH_CLIENT": "present",
        "SSH_CONNECTION": "present",
        "SSH_TTY": "present",
        "TERM": "xterm-256color",
        "color output": "enabled",
        "effective locale": "en_US.UTF-8",
        "stderr is terminal": "true",
        "stdin is terminal": "true",
        "stdout is terminal": "true",
        "terminal": "unknown",
        "terminal size": "120x30"
      },
      "remediation": null,
      "durationMs": 0
    },
    "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 --",
        "terminal title project value": "--",
        "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": "0.147.0",
        "check for update on startup": "true",
        "last checked at": "2026-08-08T04:31:35.178749144Z",
        "latest version": "0.147.0",
        "latest version status": "current version is not older",
        "npm update target": "/--/.nvm/versions/node/v24.16.0/lib/node_modules/@openai/codex",
        "update action": "npm install -g @openai/codex",
        "version cache": "/--/.codex/version.json"
      },
      "remediation": null,
      "durationMs": 510
    }
  }
}

What issue are you seeing?

(After updating to 0.147) i cannot run multiple sessions at the same time on multiple devices anymore:

Error: Failed to resume session from /--/.codex/sessions/2026/08/03/rollout-2026-08-03T15-11-29-019fc7c0-3225-7923-8042-690f08f31c92.jsonl: thread/resume failed during TUI bootstrap: thread/resume failed: thread 019fc7c0-3225-7923-8042-690f08f31c92 already has an active writer (code -32600)

Even the mobile and desktop apps cannot resume into Remote:

This task is active elsewhere. Close it there and try again here.

What steps can reproduce the bug?

Open a cli task (i always use --yolo here) and resume into the same task on other devices. In der Vergangenheit hat es immer reibungslos funktioniert. Now I can only start a single session at the moment in the same chat and also no longer connect the apps remotely (where I can sometimes only read the text summaries instead of seeing a lot of code in the CLI).

What is the expected behavior?

I can use a CLI chat on any number of devices at the same time (I usually have some computers and some mobile devices on, so I never lose the connection and the agent can work continuously)

Additional information

I am running 5.6 Sol Max in --yolo mode on Linux (Ubuntu 26.04), using terminal sessions and/or the ChatGPT/Codex-App on MacOS (26.5.2), Windows (11), iPhone (26.5.2) and terminal session on Android Phone (Android 16).