v0.9.0

0.9.0 (2026-10-16)

⚠ BREAKING CHANGES

• rename evaluate.for to evaluate.each and pool results across cases (#318)

Features

• add c.writeFile for files placed after the agent's turn (#317) (8792175)
• assert: add toHaveChanged, a matcher on the workspace diff (#314) (206276c)
• checks: record named check results and flag checks that don't discriminate (#319) (1f41ecb)
• history: name pass@1 in the summary, query and studio, and pass^k for gate 'all' (#315) (e16095b)
• query: label the harness effort option as reasoning effort (#316) (0f2aa59)
• rename evaluate.for to evaluate.each and pool results across cases (#318) (c5679e5)
• sandbox: give docker sandboxes swap headroom above the memory limit (#310) (937ccbe)
• sandbox: make an OOM kill during an attempt an infra error (#312) (1473ae3)

Bug Fixes

• cli: require a config to run (#309) (c5399ed)
• transcript: record a refused web search as a web-search event (#304) (c08018e)