Search the documentation
2 pages for claude_code_max_tool_use_concurrency.
Titles and paths first, then pages whose text carries it. Each row opens that page as this site last read it.
Environment variables
Claude Code CLI · in the page
env-vars
…| | `CLAUDE_CODE_MAX_TOOL_USE_CONCURRENCY` | Maximum number of read-only tools and subagents that can execute in paral…
Error reference
Claude Code CLI · in the page
errors
…work and how to set per-workspace caps * Reduce concurrency: lower [`CLAUDE_CODE_MAX_TOOL_USE_CONCURRENCY`](/docs/en/env-vars), avoid running many parallel subagents, or switch to a smaller model wit…