Codex removes trailing blank lines at the end of files
Open 💬 1 comment Opened May 26, 2026 by FelixJacobi
What version of Codex CLI is running?
codex-cli 0.133.0
What subscription do you have?
Business
Which model were you using?
gpt-5.3-codex
What platform is your computer?
Linux 6.12.85+deb13-amd64 x86_64 unknown
What terminal emulator and version are you using (if applicable)?
gnome-terminal
Codex doctor report
{
"schemaVersion": 1,
"generatedAt": "1779796202s since unix epoch",
"overallStatus": "ok",
"codexVersion": "0.133.0",
"checks": {
"app_server.status": {
"id": "app_server.status",
"category": "app-server",
"status": "ok",
"summary": "background server is not running",
"details": {
"control socket": "/home/felix.jacobi/.codex/app-server-control/app-server-control.sock",
"daemon state dir": "/home/felix.jacobi/.codex/app-server-daemon",
"mode": "ephemeral",
"pid file": "/home/felix.jacobi/.codex/app-server-daemon/app-server.pid (missing)",
"settings": "/home/felix.jacobi/.codex/app-server-daemon/settings.json (missing)",
"status": "not running",
"update-loop pid file": "/home/felix.jacobi/.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": "/home/felix.jacobi/.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": "/home/felix.jacobi/.codex",
"config.toml": "/home/felix.jacobi/.codex/config.toml",
"config.toml parse": "ok",
"cwd": "/home/felix.jacobi/git/iserv/internal-password",
"enabled feature flags": "shell_tool, unified_exec, shell_snapshot, terminal_resize_reflow, sqlite, memories, hooks, enable_request_compression, multi_agent, apps, tool_suggest, plugins, plugin_hooks, in_app_browser, browser_use, browser_use_external, computer_use, plugin_sharing, external_migration, image_generation, skill_mcp_dependency_install, steer, guardian_approval, goals, collaboration_modes, tool_call_mcp_elicitation, personality, fast_mode, tui_app_server, prevent_idle_sleep, workspace_dependencies",
"feature flag overrides": "memories=true, external_migration=true, prevent_idle_sleep=true",
"feature flags enabled": "31",
"log dir": "/home/felix.jacobi/.codex/log",
"mcp servers": "4",
"model": "gpt-5.3-codex",
"model provider": "openai",
"sqlite home": "/home/felix.jacobi/.codex"
},
"remediation": null,
"durationMs": 0
},
"installation": {
"id": "installation",
"category": "install",
"status": "ok",
"summary": "installation looks consistent",
"details": {
"PATH codex #1": "/home/linuxbrew/.linuxbrew/bin/codex",
"current executable": "/home/linuxbrew/.linuxbrew/Caskroom/codex/0.133.0/codex-x86_64-unknown-linux-musl",
"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": "MCP configuration is locally consistent",
"details": {
"configured servers": "4",
"disabled servers": "0",
"stdio servers": "2",
"streamable_http servers": "2"
},
"remediation": null,
"durationMs": 3242
},
"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": 83
},
"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": 581
},
"runtime.provenance": {
"id": "runtime.provenance",
"category": "runtime",
"status": "ok",
"summary": "running local build on linux-x86_64",
"details": {
"commit": "unknown",
"current executable": "/home/linuxbrew/.linuxbrew/Caskroom/codex/0.133.0/codex-x86_64-unknown-linux-musl",
"install method": "other",
"platform": "linux-x86_64",
"version": "0.133.0"
},
"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": 1
},
"sandbox.helpers": {
"id": "sandbox.helpers",
"category": "sandbox",
"status": "ok",
"summary": "sandbox configuration is readable",
"details": {
"approval policy": "OnRequest",
"codex-linux-sandbox helper": "/home/felix.jacobi/.codex/tmp/arg0/codex-arg045XQG4/codex-linux-sandbox",
"execve wrapper helper": "/home/felix.jacobi/.codex/tmp/arg0/codex-arg045XQG4/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": "/home/felix.jacobi/.codex (dir)",
"active rollout files": "110 files, 112287303 total bytes, 1020793 average bytes",
"archived rollout files": "0 files, 0 total bytes, 0 average bytes",
"goals DB": "/home/felix.jacobi/.codex/goals_1.sqlite (file)",
"goals DB integrity": "ok",
"log DB": "/home/felix.jacobi/.codex/logs_2.sqlite (file)",
"log DB integrity": "ok",
"log dir": "/home/felix.jacobi/.codex/log (dir)",
"sqlite home": "/home/felix.jacobi/.codex (dir)",
"state DB": "/home/felix.jacobi/.codex/state_5.sqlite (file)",
"state DB integrity": "ok"
},
"remediation": null,
"durationMs": 302
},
"terminal.env": {
"id": "terminal.env",
"category": "terminal",
"status": "ok",
"summary": "terminal metadata was detected",
"details": {
"COLORTERM": "yes",
"DISPLAY": "present",
"WAYLAND_DISPLAY": "present",
"color output": "enabled",
"effective locale": "de_DE.UTF-8",
"stderr is terminal": "true",
"stdin is terminal": "true",
"stdout is terminal": "true",
"terminal": "GNOME Terminal",
"terminal size": "379x107"
},
"remediation": null,
"durationMs": 0
},
"updates.status": {
"id": "updates.status",
"category": "updates",
"status": "ok",
"summary": "update configuration is locally consistent",
"details": {
"cached latest version": "0.133.0",
"check for update on startup": "true",
"last checked at": "2026-05-26T10:47:24.476108162Z",
"latest version": "0.133.0",
"latest version status": "current version is not older",
"update action": "manual or unknown",
"version cache": "/home/felix.jacobi/.codex/version.json"
},
"remediation": null,
"durationMs": 148
}
}What issue are you seeing?
Codex removes trailing blank lines (\n\n) at the end of files when editing them without explicitly being instructed to do that.
What steps can reproduce the bug?
Uploaded thread: 019e5121-7b07-7db0-b52d-730eabe416ae
What is the expected behavior?
Leaving blank lines at the end of files untouched.
Additional information
_No response_
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