Writing
One problem per post, the fix stated in the first paragraph, then how it works and when it isn't worth doing. No newsletter, no popups.
CLAUDE.md and skill files go stale the same way any doc does — except an agent silently violates them instead of a reviewer flagging a typo. Mine your own session transcripts for the corrections you keep making, cluster them, and review the rule diff instead of writing it from scratch.
Four ways a migration written by an AI agent looks correct, runs clean locally, and still causes an incident in production.
String diffs don't work on free-text output. Freeze the traces, assert on behaviour instead of text, and run the suite after every prompt or model change.
Charge after the stream using the provider's real token counts, and let a unique key on the ledger reject Stripe's duplicate webhooks.