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f1f36b3bae
A recurring cron job persists `next_run_at` as an absolute timestamp with a
UTC offset (e.g. `2026-05-19T21:00:00+10:00`). Cron expressions, however,
describe *local wall-clock* intent ("run at 21:00"). When Hermes/system
timezone changes after the timestamp was persisted, the stored instant is
re-interpreted in the new zone: `21:00+10:00` is the instant `13:00+02:00`,
which is `<= now` (13:02+02:00) — so the job fires HOURS EARLY, then
`compute_next_run` advances it via croniter to `21:00+02:00` the same day,
producing a SECOND fire. (#28934, recurrence of #24289.)
`_get_due_jobs_locked` now detects this precise migration case before the
due check: for a `cron` job whose converted instant looks due, whose stored
UTC offset differs from the current zone's, AND whose stored *wall-clock*
time is still in the future (distinguishing a migrated offset from a
genuinely missed run), it recomputes `next_run_at` from the schedule and
skips the early fire — preserving the local wall-clock intent.
Verified against the issue's reproducer: stored `21:00+10` under runtime
`+02:00` at wall-clock `13:02` is rescheduled to `21:00+02` instead of
firing early + again.
Salvaged from #28941 by @Tranquil-Flow (authorship preserved). Chosen over
the alternative approaches (#28951 normalize-to-UTC, #28985 rebase-and-match)
because UTC-normalization does not change the absolute-instant comparison and
so does not fix the early fire, and this guard is the tightest: it only acts
when all four conditions hold and reuses the existing `compute_next_run`.
Fixes #28934
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| .. | ||
| __init__.py | ||
| conftest.py | ||
| test_blueprint_catalog.py | ||
| test_claim_job_for_fire.py | ||
| test_codex_execution_paths.py | ||
| test_compute_next_run_last_run_at.py | ||
| test_cron_context_from.py | ||
| test_cron_inactivity_timeout.py | ||
| test_cron_no_agent.py | ||
| test_cron_prompt_injection_skill.py | ||
| test_cron_script.py | ||
| test_cron_workdir.py | ||
| test_cronjob_schema.py | ||
| test_file_permissions.py | ||
| test_jobs.py | ||
| test_jobs_changed_notify.py | ||
| test_jobs_crossprocess_lock.py | ||
| test_parallel_pool.py | ||
| test_rewrite_skill_refs.py | ||
| test_run_one_job.py | ||
| test_scheduler.py | ||
| test_scheduler_mcp_init.py | ||
| test_scheduler_provider.py | ||
| test_suggestions.py | ||