Follow Discord

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 v2.1.198 Home All releases ←olderv2.1.197 v2.1.199newer→

Claude Code v2.1.198 1 Jul 2026

Speculation Engine Removed

The speculative-execution subsystem (which pre-ran tool calls ahead of user confirmation to save latency) has been fully removed.

Details

All [Speculation] log messages, state machines, and the pipelined-suggestion pathway are gone
totalSpeculationTimeSavedMs is no longer tracked in usage stats
Behavioral change: no pre-executed tool calls; permission prompts now always pause before execution

Evidence

Removal of all [Speculation] strings and totalSpeculationTimeSavedMs field from the stats shape

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

See this entry in the whole of v2.1.198 →