CLAUDE_CODE_INCLUDE_PARTIAL_MESSAGES

Updated October 13, 2026 by Alex Sorokoletov

CLAUDE_CODE_INCLUDE_PARTIAL_MESSAGES is a Claude Code environment variable: Include partial/streaming messages in output. Removed between v2.1.245 and v2.1.247, so current releases ignore it. It is not in the official reference.

Status	Removed between v2.1.245 and v2.1.247
Added	Present since v2.1.69 or earlier
Category	Other
Official docs	Not listed

How to set it

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

export CLAUDE_CODE_INCLUDE_PARTIAL_MESSAGES=<value>
claude

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

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

Related variables

CLAUDE_CODE_TAG_ISMETA_MESSAGES
ANTHROPIC_BETAS: Comma-separated beta feature headers.
ANTHROPIC_CUSTOM_HEADERS: Custom HTTP headers (newline-separated Key: Value).
ANTHROPIC_FEDERATION_RULE_ID
ANTHROPIC_ORGANIZATION_ID
ANTHROPIC_WORKSPACE_ID
BETA_TRACING_ENDPOINT: Custom endpoint for beta tracing.
CLAUDE_AFK_COUNTDOWN_MS

Frequently asked questions

What does CLAUDE_CODE_INCLUDE_PARTIAL_MESSAGES do?

Include partial/streaming messages in output

Which Claude Code version has CLAUDE_CODE_INCLUDE_PARTIAL_MESSAGES?

Removed between v2.1.245 and v2.1.247, so current releases ignore it.

How do I set CLAUDE_CODE_INCLUDE_PARTIAL_MESSAGES?

Export it before starting Claude Code (export CLAUDE_CODE_INCLUDE_PARTIAL_MESSAGES=value), or add it to the "env" object in ~/.claude/settings.json to apply it to every session.

All variables, searchable: Claude Code environment variables.