ENOTFOUND — hardening one runner isn't hardening the fleetReview

Aug 2's weekly review died on a network outage that plan-day is already hardened against — because the Jul 26 hardening went into one wrapper instead of a shared runner. Fixing the instance isn't fixing the class.

On Jul 26 you shipped network-wait + retry into run_plan_day.sh (commit a727e1b) after plan-day kept dying on pre-dawn network flaps. It works: every plan-day log this week shows 'network ready' before each attempt. On Aug 2 at 18:08, run_weekly_review.sh hit the same class of failure — ENOTFOUND, DNS unreachable — and died in 70 minutes with no wait, no retry, exit 1.

This is the instance-vs-class trap, and every codebase falls into it: a failure gets fixed where it was observed, not where it lives. You have at least three cron wrappers (plan-day, weekly-review, jobhunt-sweep) that all do the same dance — wait for network, prefetch, run claude -p under a watchdog, verify the side-effect, alert on failure. Each one currently has a different, hand-copied subset of that dance.

The class-level fix is a shared runner: one script (or sourced shell library) that owns network-wait, retry, watchdog, fallback-model, and the verify-and-alert leg — with each job supplying only its prompt, its artifact check, and its timeout. Then hardening lands once and every cadence inherits it.

Worked example

Measure the drift between your two Sunday-critical wrappers:

for f in run_plan_day.sh run_weekly_review.sh; do
  echo "== $f =="
  grep -cE 'network|retry|attempt' /Users/tom/Claude/PDB/scripts/$f
done

• A high count in run_plan_day.sh and a near-zero count in run_weekly_review.sh is the drift, quantified — same failure class, unequal armor.

Gotchas

• A shared runner is a single point of failure too — a bug in it breaks every cadence at once. Version it in git and test one job before migrating the rest.
• Network-wait can't save a run if the outage outlasts the cron window; the dead-man's-switch (Jul 29 lesson) is still the backstop for total no-shows.