Codex CLI input becomes unusable after `[O[I` is inserted into the prompt
Open 💬 4 comments Opened Jun 28, 2026 by JKamsker
What version of Codex CLI is running?
codex-cli 0.142.3
What subscription do you have?
PRO
Which model were you using?
gpt-5.5
What platform is your computer?
Microsoft Windows NT 10.0.26200.0 x64
What terminal emulator and version are you using (if applicable)?
Windows Terminal
Codex doctor report
{
"schemaVersion": 1,
"generatedAt": "1782638110s since unix epoch",
"overallStatus": "warning",
"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": "C:\\Users\\Jonas\\.codex\\app-server-control\\app-server-control.sock",
"daemon state dir": "C:\\Users\\Jonas\\.codex\\app-server-daemon",
"mode": "ephemeral",
"pid file": "C:\\Users\\Jonas\\.codex\\app-server-daemon\\app-server.pid (missing)",
"settings": "C:\\Users\\Jonas\\.codex\\app-server-daemon\\settings.json (missing)",
"status": "not running",
"update-loop pid file": "C:\\Users\\Jonas\\.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": "C:\\Users\\Jonas\\.codex\\auth.json",
"auth storage mode": "File",
"stored API key": "true",
"stored ChatGPT tokens": "true",
"stored agent identity": "false",
"stored auth mode": "api_key"
},
"remediation": null,
"durationMs": 0
},
"config.load": {
"id": "config.load",
"category": "config",
"status": "ok",
"summary": "config loaded",
"details": {
"CODEX_HOME": "C:\\Users\\Jonas\\.codex",
"config.toml": "C:\\Users\\Jonas\\.codex\\config.toml",
"config.toml parse": "ok",
"cwd": "C:\\Users\\Jonas\\repos\\private\\JKamsker\\JKamsker.CodexSDK",
"enabled feature flags": "<redacted>",
"feature flag overrides": "unified_exec=true, prevent_idle_sleep=true",
"feature flags enabled": "35",
"log dir": "C:\\Users\\Jonas\\.codex\\log",
"mcp servers": "1",
"model": "gpt-5.5",
"model provider": "codex-lb",
"sqlite home": "C:\\Users\\Jonas\\.codex"
},
"remediation": null,
"durationMs": 0
},
"git.environment": {
"id": "git.environment",
"category": "git",
"status": "ok",
"summary": "git version 2.53.0.windows.2",
"details": {
".git entry": "directory",
"PATH git #1": "C:\\Program Files\\Git\\cmd\\git.exe",
"PATH git entries": "1",
"git branch": "master",
"git build options": "git version 2.53.0.windows.2; cpu: x86_64; built from commit: e9edee0b34751bf4d7d1feda0e2535bff64d4e77; sizeof-long: 4; sizeof-size_t: 8; shell-path: D:/git-sdk-64/usr/bin/sh; rust: disabled; feature: fsmonitor--daemon; gettext: enabled; libcurl: 8.18.0; OpenSSL: OpenSSL 3.5.5 27 Jan 2026; zlib: 1.3.1; SHA-1: SHA1_DC; SHA-256: SHA256_BLK; default-ref-format: files; default-hash: sha1",
"git exec path": "C:/Program Files/Git/mingw64/libexec/git-core",
"git version": "git version 2.53.0.windows.2",
"repo detected": "true",
"repo root": "C:\\Users\\Jonas\\repos\\private\\JKamsker\\JKamsker.CodexSDK",
"selected git": "C:\\Program Files\\Git\\cmd\\git.exe"
},
"remediation": null,
"durationMs": 59
},
"installation": {
"id": "installation",
"category": "install",
"status": "ok",
"summary": "installation looks consistent",
"details": {
"PATH codex #1": "C:\\nvm4w\\nodejs\\codex",
"PATH codex #2": "C:\\nvm4w\\nodejs\\codex.cmd",
"PATH codex entries": "2",
"current executable": "C:\\Users\\Jonas\\AppData\\Local\\nvm\\v25.8.2\\node_modules\\@openai\\codex\\node_modules\\@openai\\codex-win32-x64\\vendor\\x86_64-pc-windows-msvc\\bin\\codex.exe",
"install context": "npm (package C:\\Users\\Jonas\\AppData\\Local\\nvm\\v25.8.2\\node_modules\\@openai\\codex\\node_modules\\@openai\\codex-win32-x64\\vendor\\x86_64-pc-windows-msvc, bin C:\\Users\\Jonas\\AppData\\Local\\nvm\\v25.8.2\\node_modules\\@openai\\codex\\node_modules\\@openai\\codex-win32-x64\\vendor\\x86_64-pc-windows-msvc\\bin, resources C:\\Users\\Jonas\\AppData\\Local\\nvm\\v25.8.2\\node_modules\\@openai\\codex\\node_modules\\@openai\\codex-win32-x64\\vendor\\x86_64-pc-windows-msvc\\codex-resources, path C:\\Users\\Jonas\\AppData\\Local\\nvm\\v25.8.2\\node_modules\\@openai\\codex\\node_modules\\@openai\\codex-win32-x64\\vendor\\x86_64-pc-windows-msvc\\codex-path)",
"managed by bun": "false",
"managed by npm": "true",
"managed package root": "C:\\Users\\Jonas\\AppData\\Local\\nvm\\v25.8.2\\node_modules\\@openai\\codex",
"npm update target": "C:\\nvm4w\\nodejs\\node_modules\\@openai\\codex"
},
"remediation": null,
"durationMs": 236
},
"mcp.config": {
"id": "mcp.config",
"category": "mcp",
"status": "ok",
"summary": "MCP configuration is locally consistent",
"details": {
"configured servers": "1",
"disabled servers": "0",
"stdio servers": "1"
},
"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": {
"codex-lb API base URL": "https://codexlb.kamsker.at/backend-api/<redacted> reachable (HTTP 401)",
"codex-lb API route probe": "https://codexlb.kamsker.at/backend-api/<redacted> route exists (HTTP 401)",
"reachability mode": "API key auth"
},
"remediation": null,
"durationMs": 383
},
"network.websocket_reachability": {
"id": "network.websocket_reachability",
"category": "websocket",
"status": "ok",
"summary": "Responses WebSocket is not enabled for the active provider",
"details": {
"model provider": "codex-lb",
"provider name": "OpenAI",
"proxy env vars": "none",
"supports websockets": "false",
"wire API": "responses"
},
"remediation": null,
"durationMs": 0
},
"runtime.provenance": {
"id": "runtime.provenance",
"category": "runtime",
"status": "ok",
"summary": "running npm on windows-x86_64",
"details": {
"commit": "unknown",
"current executable": "C:\\Users\\Jonas\\AppData\\Local\\nvm\\v25.8.2\\node_modules\\@openai\\codex\\node_modules\\@openai\\codex-win32-x64\\vendor\\x86_64-pc-windows-msvc\\bin\\codex.exe",
"install method": "npm (package C:\\Users\\Jonas\\AppData\\Local\\nvm\\v25.8.2\\node_modules\\@openai\\codex\\node_modules\\@openai\\codex-win32-x64\\vendor\\x86_64-pc-windows-msvc, bin C:\\Users\\Jonas\\AppData\\Local\\nvm\\v25.8.2\\node_modules\\@openai\\codex\\node_modules\\@openai\\codex-win32-x64\\vendor\\x86_64-pc-windows-msvc\\bin, resources C:\\Users\\Jonas\\AppData\\Local\\nvm\\v25.8.2\\node_modules\\@openai\\codex\\node_modules\\@openai\\codex-win32-x64\\vendor\\x86_64-pc-windows-msvc\\codex-resources, path C:\\Users\\Jonas\\AppData\\Local\\nvm\\v25.8.2\\node_modules\\@openai\\codex\\node_modules\\@openai\\codex-win32-x64\\vendor\\x86_64-pc-windows-msvc\\codex-path)",
"platform": "windows-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": "C:\\Users\\Jonas\\AppData\\Local\\nvm\\v25.8.2\\node_modules\\@openai\\codex\\node_modules\\@openai\\codex-win32-x64\\vendor\\x86_64-pc-windows-msvc\\codex-path\\rg.exe",
"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": "Never",
"codex-linux-sandbox helper": "none",
"execve wrapper helper": "none",
"filesystem sandbox": "unrestricted",
"network sandbox": "enabled"
},
"remediation": null,
"durationMs": 0
},
"state.paths": {
"id": "state.paths",
"category": "state",
"status": "ok",
"summary": "state paths and databases are inspectable",
"details": {
"CODEX_HOME": "C:\\Users\\Jonas\\.codex (dir)",
"active rollout files": "9652 files, 12678389842 total bytes, 1313550 average bytes",
"archived rollout files": "407 files, 955863520 total bytes, 2348559 average bytes",
"goals DB": "C:\\Users\\Jonas\\.codex\\goals_1.sqlite (file)",
"goals DB integrity": "ok",
"log DB": "C:\\Users\\Jonas\\.codex\\logs_2.sqlite (file)",
"log DB integrity": "ok",
"log dir": "C:\\Users\\Jonas\\.codex\\log (dir)",
"memories DB": "C:\\Users\\Jonas\\.codex\\memories_1.sqlite (file)",
"memories DB integrity": "ok",
"sqlite home": "C:\\Users\\Jonas\\.codex (dir)",
"state DB": "C:\\Users\\Jonas\\.codex\\state_5.sqlite (file)",
"state DB integrity": "ok"
},
"remediation": null,
"durationMs": 101333
},
"state.rollout_db_parity": {
"id": "state.rollout_db_parity",
"category": "threads",
"status": "warning",
"summary": "rollout files and state DB thread inventory differ",
"details": {
"default model provider": "codex-lb",
"rollout DB active files": "9644",
"rollout DB active rows": "9631",
"rollout DB archive mismatches": "skipped (scan cap reached)",
"rollout DB archived files": "348",
"rollout DB archived rows": "407",
"rollout DB duplicate DB paths": "0",
"rollout DB duplicate rollout thread id sample": [
"019bc276-570d-7521-9248-3aa68e1cb074",
"019e4967-4652-70b0-b455-fd380422054d",
"019e4a32-a0f6-71c3-b7fd-c09e7470fd7a",
"019e4a38-65cd-7cf2-80d0-1bd94e1f9f57",
"019e4a74-9420-7a12-b2dc-fc5cb0557c64"
],
"rollout DB duplicate rollout thread ids": "11",
"rollout DB malformed file names": "0",
"rollout DB missing active rows": "13",
"rollout DB missing active sample": [
"C:\\Users\\Jonas\\.codex\\sessions\\2026\\05\\21 - Kopie\\rollout-2026-05-21T09-19-25-019e4967-4652-70b0-b455-fd380422054d.jsonl",
"C:\\Users\\Jonas\\.codex\\sessions\\2026\\05\\21 - Kopie\\rollout-2026-05-21T13-01-32-019e4a32-a0f6-71c3-b7fd-c09e7470fd7a - Kopie.jsonl",
"C:\\Users\\Jonas\\.codex\\sessions\\2026\\05\\21 - Kopie\\rollout-2026-05-21T13-01-32-019e4a32-a0f6-71c3-b7fd-c09e7470fd7a.jsonl",
"C:\\Users\\Jonas\\.codex\\sessions\\2026\\05\\21 - Kopie\\rollout-2026-05-21T13-07-50-019e4a38-65cd-7cf2-80d0-1bd94e1f9f57.jsonl",
"C:\\Users\\Jonas\\.codex\\sessions\\2026\\05\\21 - Kopie\\rollout-2026-05-21T14-13-34-019e4a74-9420-7a12-b2dc-fc5cb0557c64.jsonl"
],
"rollout DB missing archived rows": "0",
"rollout DB model providers": "codex-lb=9855, openai=182, codex-lb-api=1",
"rollout DB rows": "10038",
"rollout DB scan cap reached": "true",
"rollout DB scan error sample": [
"C:\\Users\\Jonas\\.codex\\sessions\\2026\\03\\04\\rollout-2026-03-04T14-11-30-019cb8f9-97ae-7702-bcd8-78f7dd77d649.jsonl (empty session file)",
"C:\\Users\\Jonas\\.codex\\sessions\\2026\\03\\04\\rollout-2026-03-04T14-11-31-019cb8f9-9800-7621-aff6-f3a73050877e.jsonl (empty session file)",
"C:\\Users\\Jonas\\.codex\\sessions\\2026\\03\\04\\rollout-2026-03-04T14-11-31-019cb8f9-9878-7651-8975-5b7cd4726345.jsonl (empty session file)",
"C:\\Users\\Jonas\\.codex\\sessions\\2026\\03\\04\\rollout-2026-03-04T14-11-31-019cb8f9-98ca-73b1-a19e-cf17b2f062fe.jsonl (empty session file)",
"C:\\Users\\Jonas\\.codex\\sessions\\2026\\03\\04\\rollout-2026-03-04T14-11-31-019cb8f9-9954-7270-a9e7-6c52794edfcc.jsonl (empty session file)"
],
"rollout DB scan errors": "8",
"rollout DB sources": "subagent:thread_spawn=6813, cli=1664, exec=522, vscode=511, subagent:review=496, mcp=32",
"rollout DB stale rows": "skipped (scan cap reached)"
},
"issues": [
{
"severity": "warning",
"cause": "rollout files are missing from the state DB",
"measured": "13 active, 0 archived",
"expected": "every rollout file has a matching threads row",
"remedy": null,
"fields": []
},
{
"severity": "warning",
"cause": "duplicate thread inventory entries found",
"measured": "11 duplicate rollout thread ids, 0 duplicate DB paths",
"expected": "one rollout path and thread id per thread",
"remedy": "Attach the doctor report to a bug report so support can inspect samples.",
"fields": []
},
{
"severity": "warning",
"cause": "rollout scan was incomplete or found bad files",
"measured": "8 scan errors, 0 malformed names, scan cap reached: true",
"expected": "rollout directories are fully scannable",
"remedy": "Check file permissions and unexpected files under CODEX_HOME sessions.",
"fields": []
}
],
"remediation": null,
"durationMs": 110608
},
"system.environment": {
"id": "system.environment",
"category": "system",
"status": "ok",
"summary": "OS language de-DE",
"details": {
"EDITOR": "not set",
"VISUAL": "not set",
"os": "Windows 10.0.26200 (Windows 11 Professional) [64-bit]",
"os language": "de-DE",
"os type": "Windows",
"os version": "10.0.26200"
},
"remediation": null,
"durationMs": 0
},
"terminal.env": {
"id": "terminal.env",
"category": "terminal",
"status": "ok",
"summary": "terminal metadata was detected",
"details": {
"WT_SESSION": "present",
"color output": "enabled",
"console input code page": "850",
"console output code page": "850",
"stderr console mode": "0x00000007 (VT processing: true)",
"stderr is terminal": "true",
"stdin is terminal": "true",
"stdout console mode": "0x00000007 (VT processing: true)",
"stdout is terminal": "true",
"terminal": "Windows Terminal",
"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 root",
"terminal title project value": "JKamsker.CodexSDK",
"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",
"dismissed version": "0.93.0",
"last checked at": "2026-06-27T13:01:33.474792500Z",
"latest version": "0.142.3",
"latest version status": "current version is not older",
"npm update target": "C:\\nvm4w\\nodejs\\node_modules\\@openai\\codex",
"update action": "npm install -g @openai/codex",
"version cache": "C:\\Users\\Jonas\\.codex\\version.json"
},
"remediation": null,
"durationMs": 396
}
}
}What issue are you seeing?
Sometimes while using Codex CLI, the input field gets corrupted with the literal characters:
[O[IAfter this appears, the input field becomes unusable:
- Backspace/Delete do not remove the characters
- Enter does not submit the message
- Codex itself appears to keep running, but the prompt/input area is stuck
This happened while Codex was working on a task. The UI still showed the normal input footer, including tab to queue message, but the prompt was no longer usable.
What steps can reproduce the bug?
I do not have a fully deterministic reproduction yet, but it happens intermittently during normal Codex CLI usage.
Observed flow:
- Start Codex CLI in Windows Terminal using PowerShell.
- Ask Codex to perform a task.
- While Codex is in the
Workingstate, the input field sometimes receives the literal characters[O[I. - After that, the prompt/input field becomes stuck.
- Backspace/Delete cannot remove the characters.
- Pressing Enter does not submit the message.
What is the expected behavior?
The input field should remain editable.
Terminal control/focus sequences should not appear as literal text in the prompt, and Backspace/Delete/Enter should continue working normally.
Additional information
<img width="1481" height="760" alt="Image" src="https://github.com/user-attachments/assets/aa6f231c-14a9-4402-85dd-a1788833a9c6" />
This issue has 4 comments on GitHub. Read the full discussion on GitHub ↗