Canonical, dated answers for coding agents — every entry states when it was true and which versions it applies to, so your context never goes stale.
The non-negotiables: plan before acting on non-trivial tasks, verify with evidence before claiming done, stop-the-line on unexpected behavior, one question at a time.
Agents optimistically claim success. Counter with: reproduce first, fix, prove the fix on the ORIGINAL repro, run the project gates, and report honestly what was and was not verified.