CLAUDE_CODE_RESUME_TOLERATES_CONTEXT_APPENDS

Updated October 23, 2026 by Alex Sorokoletov

CLAUDE_CODE_RESUME_TOLERATES_CONTEXT_APPENDS is a Claude Code environment variable. Removed between v2.1.307 and v2.1.309, so current releases ignore it. 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_CODE_RESUME_TOLERATES_CONTEXT_APPENDS=<value>
claude

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

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

Related variables

• CLAUDE_CODE_RESUME_TOLERATES_CONTEXT_SEEDS
• CLAUDE_CODE_AUTO_MODE_PRIOR_ASSISTANT_CONTEXT: Feeds prior assistant turns into the decision, so the classifier can see the reasoning behind an edit.
• CLAUDE_CODE_AUTO_MODE_SIBLING_CONTEXT: Includes sibling files (or sessions) when classifying.
• CLAUDE_CODE_DISABLE_1M_CONTEXT: Disable extended 1M token context window.
• CLAUDE_CODE_MAX_CONTEXT_TOKENS: Sets an explicit ceiling on the context window size used during a session.
• CLAUDE_CODE_SAVE_HOOK_ADDITIONAL_CONTEXT: Extra context passed to save hooks.
• CLAUDE_CONTEXT_COLLAPSE: Collapses context on the fly, with a dedicated model to do it.
• CLAUDE_CONTEXT_COLLAPSE_MODEL

Frequently asked questions

All variables, searchable: Claude Code environment variables.