Run autonomous coding sessions off a JSON feature list with passes:false plus init.sh

Anthropic Engineering·low signal

Anthropic's long-running-agent harness pattern uses a structured JSON feature file (each feature marked `"passes": false`, JSON over Markdown so the model won't casually rewrite it), a `claude-progress.txt` log, and an `init.sh` that boots the dev server and runs end-to-end checks so each fresh session refuses to build on a broken state. Every session starts by reading git logs and progress, picking the highest-priority incomplete feature, and verifying the app runs before coding. It's a durable scaffold for unattended multi-session builds — directly relevant if you run agents on a daily cron.