<p>One of the most interesting tips I got from <a href="https://www.ai.engineer/worldsfair/schedule?session=asn_slot_2026_06_30_main_stage_1230_2026_06_08t09_35_43_039z">the Fireside Chat</a> I hosted with Cat Wu and Thariq Shihipar from the Claude Code team at AIE on Wednesday was to let Fable (and to a certain extent Opus) use their own judgement rather than dictating how they should work.</p> <p>The example they gave was testing. You can tell Fable "only use automated testing for larger features, don't update and run tests for small copy or design changes" - but it's better to just tell Fab