Codex CLI `resume` can create two live divergent agents after SSH disconnect
Open 💬 1 comment Opened Jun 28, 2026 by odeinjul
What version of Codex CLI is running?
0.142.3
What subscription do you have?
Pro 20x
Which model were you using?
gpt-5.5 xhigh fast
What platform is your computer?
Linux 5.15.0-177-generic x86_64 x86_64
What terminal emulator and version are you using (if applicable)?
VS Code remote ssh
Codex doctor report
{
"schemaVersion": 1,
"generatedAt": "1782635674s since unix epoch",
"overallStatus": "ok",
"codexVersion": "0.142.3",
"checks": {
"app_server.status": {
"id": "app_server.status",
"category": "app-server",
"status": "ok",
"summary": "background server is not running",
"details": {
"control socket": "/users/shurangw/.codex/app-server-control/app-server-control.sock",
"daemon state dir": "/users/shurangw/.codex/app-server-daemon",
"mode": "ephemeral",
"pid file": "/users/shurangw/.codex/app-server-daemon/app-server.pid (missing)",
"settings": "/users/shurangw/.codex/app-server-daemon/settings.json (missing)",
"status": "not running",
"update-loop pid file": "/users/shurangw/.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/shurangw/.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/shurangw/.codex",
"config.toml": "/users/shurangw/.codex/config.toml",
"config.toml parse": "ok",
"cwd": "/users/shurangw/workspace/vectordb-cxl",
"enabled feature flags": "shell_tool, unified_exec, shell_snapshot, terminal_resize_reflow, sqlite, memories, hooks, enable_request_compression, network_proxy, multi_agent, apps, tool_search_always_defer_mcp_tools, tool_suggest, plugins, in_app_browser, browser_use, browser_use_full_cdp_access, browser_use_external, computer_use, plugin_sharing, image_generation, resize_all_images, skill_mcp_dependency_install, mentions_v2, steer, guardian_approval, goals, collaboration_modes, tool_call_mcp_elicitation, personality, fast_mode, tui_app_server, prevent_idle_sleep, auto_compaction, remote_compaction_v2, workspace_dependencies",
"feature flag overrides": "memories=true, network_proxy=true, prevent_idle_sleep=true",
"feature flags enabled": "36",
"log dir": "/users/shurangw/.codex/log",
"mcp servers": "0",
"model": "gpt-5.5",
"model provider": "openai",
"sqlite home": "/users/shurangw/.codex"
},
"remediation": null,
"durationMs": 0
},
"git.environment": {
"id": "git.environment",
"category": "git",
"status": "ok",
"summary": "git version 2.34.1",
"details": {
".git entry": "directory",
"PATH git #1": "/usr/bin/git",
"PATH git #2": "/bin/git",
"PATH git entries": "2",
"git branch": "feature/cn-local-storage-unified",
"git build options": "git version 2.34.1; cpu: x86_64; no commit associated with this build; sizeof-long: 8; sizeof-size_t: 8; shell-path: /bin/sh",
"git exec path": "/usr/lib/git-core",
"git version": "git version 2.34.1",
"repo detected": "true",
"repo root": "/users/shurangw/workspace/vectordb-cxl",
"selected git": "/usr/bin/git"
},
"remediation": null,
"durationMs": 157
},
"installation": {
"id": "installation",
"category": "install",
"status": "ok",
"summary": "installation looks consistent",
"details": {
"PATH codex #1": "/users/shurangw/.nvm/versions/node/v22.23.0/bin/codex",
"current executable": "/users/shurangw/.nvm/versions/node/v22.23.0/lib/node_modules/@openai/codex/node_modules/@openai/codex-linux-x64/vendor/x86_64-unknown-linux-musl/bin/codex",
"install context": "npm (package /users/shurangw/.nvm/versions/node/v22.23.0/lib/node_modules/@openai/codex/node_modules/@openai/codex-linux-x64/vendor/x86_64-unknown-linux-musl, bin /users/shurangw/.nvm/versions/node/v22.23.0/lib/node_modules/@openai/codex/node_modules/@openai/codex-linux-x64/vendor/x86_64-unknown-linux-musl/bin, resources /users/shurangw/.nvm/versions/node/v22.23.0/lib/node_modules/@openai/codex/node_modules/@openai/codex-linux-x64/vendor/x86_64-unknown-linux-musl/codex-resources, path /users/shurangw/.nvm/versions/node/v22.23.0/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 package root": "/users/shurangw/.nvm/versions/node/v22.23.0/lib/node_modules/@openai/codex",
"npm update target": "/users/shurangw/.nvm/versions/node/v22.23.0/lib/node_modules/@openai/codex"
},
"remediation": null,
"durationMs": 886
},
"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": 198
},
"network.websocket_reachability": {
"id": "network.websocket_reachability",
"category": "websocket",
"status": "ok",
"summary": "Responses WebSocket handshake succeeded",
"details": {
"DNS": "2 IPv4, 2 IPv6, first IPv4",
"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": 621
},
"runtime.provenance": {
"id": "runtime.provenance",
"category": "runtime",
"status": "ok",
"summary": "running npm on linux-x86_64",
"details": {
"commit": "unknown",
"current executable": "/users/shurangw/.nvm/versions/node/v22.23.0/lib/node_modules/@openai/codex/node_modules/@openai/codex-linux-x64/vendor/x86_64-unknown-linux-musl/bin/codex",
"install method": "npm (package /users/shurangw/.nvm/versions/node/v22.23.0/lib/node_modules/@openai/codex/node_modules/@openai/codex-linux-x64/vendor/x86_64-unknown-linux-musl, bin /users/shurangw/.nvm/versions/node/v22.23.0/lib/node_modules/@openai/codex/node_modules/@openai/codex-linux-x64/vendor/x86_64-unknown-linux-musl/bin, resources /users/shurangw/.nvm/versions/node/v22.23.0/lib/node_modules/@openai/codex/node_modules/@openai/codex-linux-x64/vendor/x86_64-unknown-linux-musl/codex-resources, path /users/shurangw/.nvm/versions/node/v22.23.0/lib/node_modules/@openai/codex/node_modules/@openai/codex-linux-x64/vendor/x86_64-unknown-linux-musl/codex-path)",
"platform": "linux-x86_64",
"version": "0.142.3"
},
"remediation": null,
"durationMs": 0
},
"runtime.search": {
"id": "runtime.search",
"category": "search",
"status": "ok",
"summary": "search is OK (bundled)",
"details": {
"search command": "/users/shurangw/.nvm/versions/node/v22.23.0/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": "/users/shurangw/.codex/tmp/arg0/codex-arg0u9Y8Tx/codex-linux-sandbox",
"execve wrapper helper": "/users/shurangw/.codex/tmp/arg0/codex-arg0u9Y8Tx/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/shurangw/.codex (dir)",
"active rollout files": "114 files, 211180810 total bytes, 1852463 average bytes",
"archived rollout files": "0 files, 0 total bytes, 0 average bytes",
"goals DB": "/users/shurangw/.codex/goals_1.sqlite (file)",
"goals DB integrity": "ok",
"log DB": "/users/shurangw/.codex/logs_2.sqlite (file)",
"log DB integrity": "ok",
"log dir": "/users/shurangw/.codex/log (missing)",
"memories DB": "/users/shurangw/.codex/memories_1.sqlite (file)",
"memories DB integrity": "ok",
"sqlite home": "/users/shurangw/.codex (dir)",
"state DB": "/users/shurangw/.codex/state_5.sqlite (file)",
"state DB integrity": "ok"
},
"remediation": null,
"durationMs": 142775
},
"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": "113",
"rollout DB active rows": "113",
"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=113",
"rollout DB rows": "113",
"rollout DB scan cap reached": "false",
"rollout DB scan errors": "0",
"rollout DB sources": "subagent:other=43, cli=38, subagent:thread_spawn=32",
"rollout DB stale rows": "0"
},
"remediation": null,
"durationMs": 22246
},
"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 22.4.0 (jammy) [64-bit]",
"os language": "en-US",
"os type": "Ubuntu",
"os version": "22.4.0"
},
"remediation": null,
"durationMs": 53
},
"terminal.env": {
"id": "terminal.env",
"category": "terminal",
"status": "ok",
"summary": "terminal metadata was detected",
"details": {
"COLORTERM": "truecolor",
"SSH_CLIENT": "present",
"SSH_CONNECTION": "present",
"TERM_PROGRAM": "vscode",
"VSCODE_IPC_HOOK_CLI": "present",
"color output": "enabled",
"effective locale": "en_US.UTF-8",
"stderr is terminal": "true",
"stdin is terminal": "true",
"stdout is terminal": "true",
"terminal": "VS Code",
"terminal size": "160x36",
"terminal version": "1.126.0"
},
"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 root",
"terminal title project value": "vectordb-cxl",
"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": "0.142.3",
"check for update on startup": "true",
"last checked at": "2026-06-28T08:05:48.264183741Z",
"latest version": "0.142.3",
"latest version status": "current version is not older",
"npm update target": "/users/shurangw/.nvm/versions/node/v22.23.0/lib/node_modules/@openai/codex",
"update action": "npm install -g @openai/codex",
"version cache": "/users/shurangw/.codex/version.json"
},
"remediation": null,
"durationMs": 810
}
}
}What issue are you seeing?
I use Codex CLI inside a VS Code Remote SSH terminal on a remote machine. While a Codex agent was running a long /goal task, my SSH connection was lost. After reconnecting, I ran codex resume and selected the same thread.
However, the original Codex process was still running in the background on the remote machine. This created two live agents from the same previous thread history.
What steps can reproduce the bug?
- Start a codex agent via VS Code remote ssh terminal running a long term task with
/goal, record codex thread-id. - Lost VS Code remote ssh connection.
- Start another remote ssh terminal, run
codex resume thread-id
Actual behavior after reconnecting:
- The original Codex agent continued running in the background.
codex resumestarted another agent from the same thread.- The two agents diverged from the SSH-disconnect point.
- They were not aware of each other.
- Both could edit the same repository files at the same time.
- The session history could fork/conflict.
From the user perspective, they looked like two different agents even though they came from the same thread.
What is the expected behavior?
Codex CLI should warn when resuming a thread that already has an active process on the same remote machine / same repo.
Additional information
Possible improvements:
- Detect active Codex processes for the same thread ID.
- Show PID, repo path, and start time.
- Offer options to reattach, cancel, kill the old process, or intentionally start a new divergent session.
- Warn that two agents may race on the same working tree.
Workaround:
Using tmux avoids this because the original terminal can be reattached after SSH reconnect.
But accidental codex resume is still easy, so active-session detection or locking would be helpful.
This issue has 1 comment on GitHub. Read the full discussion on GitHub ↗