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codex - 💡(How to fix) Fix Remote compact task fails with "array too long" error after upgrading to 0.132.0

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After upgrading Codex CLI from 0.130.0 to 0.132.0, the remote compact task fails with an array_above_max_length error from the API. The conversation array exceeds the maximum allowed length of 16384 items.

This did not occur on 0.130.0 with the same usage pattern.

Error Message

After upgrading Codex CLI from 0.130.0 to 0.132.0, the remote compact task fails with an array_above_max_length error from the API. The conversation array exceeds the maximum allowed length of 16384 items. The compact task fails with the following error: ■ Error running remote compact task: { "error": {

Root Cause

After upgrading Codex CLI from 0.130.0 to 0.132.0, the remote compact task fails with an array_above_max_length error from the API. The conversation array exceeds the maximum allowed length of 16384 items.

This did not occur on 0.130.0 with the same usage pattern.

Code Example

{
  "schemaVersion": 1,
  "generatedAt": "1779284857s since unix epoch",
  "overallStatus": "ok",
  "codexVersion": "0.132.0",
  "checks": {
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      "status": "ok",
      "summary": "background server is not running",
      "details": {
        "control socket": "/home/clement/.codex/app-server-control/app-server-control.sock",
        "daemon state dir": "/home/clement/.codex/app-server-daemon",
        "mode": "ephemeral",
        "pid file": "/home/clement/.codex/app-server-daemon/app-server.pid (missing)",
        "settings": "/home/clement/.codex/app-server-daemon/settings.json (missing)",
        "status": "not running",
        "update-loop pid file": "/home/clement/.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/clement/.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/clement/.codex",
        "config.toml": "/home/clement/.codex/config.toml",
        "config.toml parse": "ok",
        "cwd": "/work/xaat/redface2",
        "enabled feature flags": "shell_tool, unified_exec, shell_snapshot, terminal_resize_reflow, sqlite, hooks, enable_request_compression, multi_agent, apps, tool_search, tool_suggest, plugins, plugin_hooks, in_app_browser, browser_use, browser_use_external, computer_use, plugin_sharing, image_generation, skill_mcp_dependency_install, steer, guardian_approval, collaboration_modes, tool_call_mcp_elicitation, personality, fast_mode, tui_app_server, workspace_dependencies",
        "feature flag overrides": "none",
        "feature flags enabled": "28",
        "log dir": "/home/clement/.codex/log",
        "mcp servers": "2",
        "model": "gpt-5.5",
        "model provider": "openai",
        "sqlite home": "/home/clement/.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/0.132.0/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": 11
    },
    "mcp.config": {
      "id": "mcp.config",
      "category": "mcp",
      "status": "ok",
      "summary": "MCP configuration is locally consistent",
      "details": {
        "configured servers": "2",
        "disabled servers": "0",
        "stdio servers": "1",
        "streamable_http servers": "1"
      },
      "remediation": null,
      "durationMs": 532
    },
    "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)",
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      },
      "remediation": null,
      "durationMs": 206
    },
    "network.websocket_reachability": {
      "id": "network.websocket_reachability",
      "category": "websocket",
      "status": "ok",
      "summary": "Responses WebSocket handshake succeeded",
      "details": {
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        "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",
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        "supports websockets": "true",
        "wire API": "responses"
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      "remediation": null,
      "durationMs": 646
    },
    "runtime.provenance": {
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      "status": "ok",
      "summary": "running local build on linux-x86_64",
      "details": {
        "commit": "unknown",
        "current executable": "/home/linuxbrew/.linuxbrew/Caskroom/codex/0.132.0/codex-x86_64-unknown-linux-musl",
        "install method": "other",
        "platform": "linux-x86_64",
        "version": "0.132.0"
      },
      "remediation": null,
      "durationMs": 0
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    "runtime.search": {
      "id": "runtime.search",
      "category": "search",
      "status": "ok",
      "summary": "search is OK (system)",
      "details": {
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        "search command readiness": "ripgrep 15.1.0",
        "search provider": "system"
      },
      "remediation": null,
      "durationMs": 30
    },
    "sandbox.helpers": {
      "id": "sandbox.helpers",
      "category": "sandbox",
      "status": "ok",
      "summary": "sandbox configuration is readable",
      "details": {
        "approval policy": "OnRequest",
        "codex-linux-sandbox helper": "/home/clement/.codex/tmp/arg0/codex-arg0Q8CGvk/codex-linux-sandbox",
        "execve wrapper helper": "/home/clement/.codex/tmp/arg0/codex-arg0Q8CGvk/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/clement/.codex (dir)",
        "active rollout files": "26 files, 125758207 total bytes, 4836854 average bytes",
        "archived rollout files": "0 files, 0 total bytes, 0 average bytes",
        "log DB": "/home/clement/.codex/logs_2.sqlite (file)",
        "log DB integrity": "ok",
        "log dir": "/home/clement/.codex/log (dir)",
        "sqlite home": "/home/clement/.codex (dir)",
        "state DB": "/home/clement/.codex/state_5.sqlite (file)",
        "state DB integrity": "ok"
      },
      "remediation": null,
      "durationMs": 143
    },
    "terminal.env": {
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      "category": "terminal",
      "status": "ok",
      "summary": "terminal metadata was detected",
      "details": {
        "COLORTERM": "truecolor",
        "DISPLAY": "present",
        "WAYLAND_DISPLAY": "present",
        "color output": "enabled",
        "effective locale": "fr_FR.UTF-8",
        "stderr is terminal": "true",
        "stdin is terminal": "true",
        "stdout is terminal": "true",
        "terminal": "VTE",
        "terminal size": "212x49",
        "terminal version": "8400"
      },
      "remediation": null,
      "durationMs": 0
    },
    "updates.status": {
      "id": "updates.status",
      "category": "updates",
      "status": "ok",
      "summary": "update configuration is locally consistent",
      "details": {
        "cached latest version": "0.131.0",
        "check for update on startup": "true",
        "last checked at": "2026-05-19T18:44:55.329472922Z",
        "latest version": "0.132.0",
        "latest version status": "current version is not older",
        "update action": "manual or unknown",
        "version cache": "/home/clement/.codex/version.json"
      },
      "remediation": null,
      "durationMs": 310
    }
  }
}

---

■ Error running remote compact task: {
  "error": {
    "message": "Invalid 'input': array too long. Expected an array with maximum length 16384, but got an array with length 19300 instead.",
    "type": "invalid_request_error",
    "param": "input",
    "code": "array_above_max_length"
  }
}
​
RAW_BUFFERClick to expand / collapse

What version of Codex CLI is running?

codex-cli 0.132.0

What subscription do you have?

Business

Which model were you using?

gpt-5.5

What platform is your computer?

Linux fedora 7.0.4-200.fc44.x86_64

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

terminal (gui Gnome)

Codex doctor report

{
  "schemaVersion": 1,
  "generatedAt": "1779284857s since unix epoch",
  "overallStatus": "ok",
  "codexVersion": "0.132.0",
  "checks": {
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      "id": "app_server.status",
      "category": "app-server",
      "status": "ok",
      "summary": "background server is not running",
      "details": {
        "control socket": "/home/clement/.codex/app-server-control/app-server-control.sock",
        "daemon state dir": "/home/clement/.codex/app-server-daemon",
        "mode": "ephemeral",
        "pid file": "/home/clement/.codex/app-server-daemon/app-server.pid (missing)",
        "settings": "/home/clement/.codex/app-server-daemon/settings.json (missing)",
        "status": "not running",
        "update-loop pid file": "/home/clement/.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/clement/.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/clement/.codex",
        "config.toml": "/home/clement/.codex/config.toml",
        "config.toml parse": "ok",
        "cwd": "/work/xaat/redface2",
        "enabled feature flags": "shell_tool, unified_exec, shell_snapshot, terminal_resize_reflow, sqlite, hooks, enable_request_compression, multi_agent, apps, tool_search, tool_suggest, plugins, plugin_hooks, in_app_browser, browser_use, browser_use_external, computer_use, plugin_sharing, image_generation, skill_mcp_dependency_install, steer, guardian_approval, collaboration_modes, tool_call_mcp_elicitation, personality, fast_mode, tui_app_server, workspace_dependencies",
        "feature flag overrides": "none",
        "feature flags enabled": "28",
        "log dir": "/home/clement/.codex/log",
        "mcp servers": "2",
        "model": "gpt-5.5",
        "model provider": "openai",
        "sqlite home": "/home/clement/.codex"
      },
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      "durationMs": 0
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    "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/0.132.0/codex-x86_64-unknown-linux-musl",
        "install context": "other",
        "managed by bun": "false",
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        "managed package root": "not set"
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      "remediation": null,
      "durationMs": 11
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    "mcp.config": {
      "id": "mcp.config",
      "category": "mcp",
      "status": "ok",
      "summary": "MCP configuration is locally consistent",
      "details": {
        "configured servers": "2",
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        "stdio servers": "1",
        "streamable_http servers": "1"
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      "remediation": null,
      "durationMs": 532
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    "network.env": {
      "id": "network.env",
      "category": "network",
      "status": "ok",
      "summary": "network-related environment looks readable",
      "details": {
        "proxy env vars": "none"
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      "remediation": null,
      "durationMs": 0
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    "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)",
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      "remediation": null,
      "durationMs": 206
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      "id": "network.websocket_reachability",
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      "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",
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        "provider name": "OpenAI",
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    "runtime.provenance": {
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      "status": "ok",
      "summary": "running local build on linux-x86_64",
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        "commit": "unknown",
        "current executable": "/home/linuxbrew/.linuxbrew/Caskroom/codex/0.132.0/codex-x86_64-unknown-linux-musl",
        "install method": "other",
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        "version": "0.132.0"
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    "runtime.search": {
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      "category": "search",
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        "codex-linux-sandbox helper": "/home/clement/.codex/tmp/arg0/codex-arg0Q8CGvk/codex-linux-sandbox",
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        "filesystem sandbox": "restricted",
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    "state.paths": {
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      "details": {
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        "active rollout files": "26 files, 125758207 total bytes, 4836854 average bytes",
        "archived rollout files": "0 files, 0 total bytes, 0 average bytes",
        "log DB": "/home/clement/.codex/logs_2.sqlite (file)",
        "log DB integrity": "ok",
        "log dir": "/home/clement/.codex/log (dir)",
        "sqlite home": "/home/clement/.codex (dir)",
        "state DB": "/home/clement/.codex/state_5.sqlite (file)",
        "state DB integrity": "ok"
      },
      "remediation": null,
      "durationMs": 143
    },
    "terminal.env": {
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      "category": "terminal",
      "status": "ok",
      "summary": "terminal metadata was detected",
      "details": {
        "COLORTERM": "truecolor",
        "DISPLAY": "present",
        "WAYLAND_DISPLAY": "present",
        "color output": "enabled",
        "effective locale": "fr_FR.UTF-8",
        "stderr is terminal": "true",
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        "terminal": "VTE",
        "terminal size": "212x49",
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      },
      "remediation": null,
      "durationMs": 0
    },
    "updates.status": {
      "id": "updates.status",
      "category": "updates",
      "status": "ok",
      "summary": "update configuration is locally consistent",
      "details": {
        "cached latest version": "0.131.0",
        "check for update on startup": "true",
        "last checked at": "2026-05-19T18:44:55.329472922Z",
        "latest version": "0.132.0",
        "latest version status": "current version is not older",
        "update action": "manual or unknown",
        "version cache": "/home/clement/.codex/version.json"
      },
      "remediation": null,
      "durationMs": 310
    }
  }
}

What issue are you seeing?

Description

After upgrading Codex CLI from 0.130.0 to 0.132.0, the remote compact task fails with an array_above_max_length error from the API. The conversation array exceeds the maximum allowed length of 16384 items.

This did not occur on 0.130.0 with the same usage pattern.

Actual behavior

The compact task fails with the following error:

​ ■ Error running remote compact task: { "error": { "message": "Invalid 'input': array too long. Expected an array with maximum length 16384, but got an array with length 19300 instead.", "type": "invalid_request_error", "param": "input", "code": "array_above_max_length" } } ​

The session is then stuck — compaction cannot succeed and the conversation cannot continue cleanly.

What steps can reproduce the bug?

  1. Upgrade Codex CLI from 0.130.0 to 0.132.0
  2. Use Codex normally until the conversation grows large enough to trigger an auto-compact
  3. Observe the remote compact task failing

What is the expected behavior?

The remote compact task should successfully reduce the conversation size, or the client should pre-emptively trim/split the input to stay within the API's 16384-item array limit before sending the compact request.

Additional information

No response

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codex - 💡(How to fix) Fix Remote compact task fails with "array too long" error after upgrading to 0.132.0