Follow Discord
Sweep 22 Oct 2026 · 04:32Z Build v2.1.308 527 read Stable v2.1.308 Latest v2.1.308 Next v2.1.308 Feeds RSS JSON llms.txt llms-full.txt Unofficial

Claude Code v2.1.31 ·

Expanded Tool Usage Instructions in System Prompt

Entry
JSON All of v2.1.31
EntryKind: in v2.1.31,
ChangesSection of the release

The system prompt now provides individual, per-tool instructions for when to use dedicated tools instead of Bash, replacing the previous single-paragraph format. The new format:

  • Lists each tool explicitly: Read instead of cat/head/tail/sed, Edit instead of sed/awk, Write instead of cat with heredoc, Glob instead of find/ls, Grep instead of grep/rg
  • Uses stronger wording: "Do NOT use the [Bash] to run commands when a relevant dedicated tool is provided"
  • Emphasizes this as "CRITICAL to assisting the user"
  • Wraps the tool-specific lines inside a top-level instruction, creating a clearer hierarchy

Previously, Glob and Grep were not explicitly mentioned as alternatives to bash commands.

Evidence

Expanded tool usage policy (search for "exclusively for system commands and terminal operations that require shell execution" and "Do NOT use the")

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

See this entry in the whole of v2.1.31 →

Feedback