Cron jobs that survive production
Idempotency, overlap, time zones, logs, secrets and the point where a different scheduler earns its complexity.
Guides
Maintain what works. Change what no longer does.
A deliberately small guide library for long-lived Perl systems. Every technical page states its evidence and review limits.
Operate
Keep the current system dependable.
Choose a modern Perl HTTP client
Where HTTP::Tiny is enough and when Mojo::UserAgent earns the dependency.
Modernise
Move one boundary at a time.
From CGI to PSGI without changing behaviour
Freeze the HTTP contract first, expose process-state risks and keep rollback possible.
Read a small CGI application line by line
A bounded reconstruction with its untested examples and pending independent review stated in public.
Current evidence boundaryFive of eight technical pages still await independent Perl review. Missing review blocks stronger claims and new security-sensitive publishing; it does not turn an honest limitation into a hidden one. Read the editorial rules.