Source Intelligence

DisclaimerUnofficial, and not affiliated with Anthropic. Nearly all of this is read straight out of what ships: npm bundles, captured prompts, published docs. Anthropic's own notes go in verbatim, marked as theirs. The rest is my reading, and every entry carries the strings behind it. If one looks wrong, vote it down and say why.

All of v2.1.70 Home All releases olderv2.1.69 v2.1.71newer
Claude Code v2.1.70

Token Saver for Bash Output

What

Bash tool results can now send a compressed version of output to the model while the UI still displays the full uncompressed stdout, reducing token usage on large command outputs.

Details
  • A new tokenSaverOutput field is added to the Bash tool result schema
  • When token-saver is active, the model receives a compressed representation while users see full output
  • Helps conserve context window on commands with verbose output
Evidence

New schema field with description "Compressed output sent to model when token-saver is active (UI still uses stdout)" (search for "tokenSaverOutput")

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

See this entry in the whole of v2.1.70 →