CLAUDE_PTY_HOST_NO_STABLE_PATH

Updated October 23, 2026 by Alex Sorokoletov

CLAUDE_PTY_HOST_NO_STABLE_PATH is a Claude Code environment variable. Added in v2.1.295 and still present in v2.1.310. It is not in the official reference.

How to set it

For one session, export it in the shell that starts Claude Code:

export CLAUDE_PTY_HOST_NO_STABLE_PATH=<value>
claude

To apply it to every session, add it to the env object of a settings file:

// ~/.claude/settings.json
{
  "env": {
    "CLAUDE_PTY_HOST_NO_STABLE_PATH": "<value>"
  }
}

Related variables

• CLAUDE_PTY_HOST_EXEC
• CLAUDE_CODE_ATTACHMENTS_BY_PATH: When set, the attachment handler takes the by-path route instead of an upload mode, so attachments are referenced by their file path rather than having their contents uploaded.
• CLAUDE_CODE_HOST_PLATFORM: Override platform detection: win32, darwin, linux.
• CLAUDE_CODE_WORKSPACE_HOST_PATHS: Specifies host-side filesystem paths that should be mapped or accessible within a workspace context.
• CLAUDE_PTY_RECORD: Enables PTY session recording for a background agent — captures the raw terminal byte stream as a bit-for-bit replay artifact, not just a transcript.
• CLAUDE_AI_HOST
• CLAUDE_ARTIFACT_HOST_GRANT
• CLAUDE_CODE_ARTIFACT_PATH_PIN

Frequently asked questions

All variables, searchable: Claude Code environment variables.