# NousResearch/hermes-agent · Cron zero-interval validation to prevent runaway jobs

## Open now

- 1 issue, 3 PRs open on GitHub.
- #55727: Cron 'every 0m' interval is accepted and re-fires every tick (runaway job)
- PR #55726: fix(cron): reject sub-minute recurring intervals (every 0m runaway)
- PR #55751: fix(cron): reject zero-interval schedules (every 0m/every 0h)
- PR #55990: fix(cron): reject zero-duration intervals to prevent runaway jobs (#55727)

These issues and pull requests concern a bug where cron schedules with zero-duration intervals (e.g., 'every 0m') are accepted and trigger runaway repeated execution. The work focuses on adding validation to reject such zero or sub-minute intervals.

## TL;DR

- 4 member(s): 1 open issue(s), 0 closed issue(s), 3 open PR(s), 0 merged PR(s), 0 PR(s) closed without merging.
- No fix has been merged to main; one or more PRs were attempted (see below).
- **Recommended:** review the prior/competing PR(s) below. A fix was attempted but not merged; your case may extend or revive that work.

## Maintainer resolution verdict

- Internal-tracker verdict over this cluster's issue members: `unresolved`. This is distinct from the fix status above. Weigh it yourself.

## How this cluster was grouped

- Link evidence (`STRUCTURAL_SPANNING`): every member is connected by structural evidence: shared changed files, or a closing/superseded reference.
- Pairwise link density `0.50`: the share of member pairs that carry a link, counting a structural link in full and a relevance-only link at 0.36. `1.00` means every pair is linked.

## Open related issues

- #55727: Cron 'every 0m' interval is accepted and re-fires every tick (runaway job)

## Prior & competing PRs

- **#55726: fix(cron): reject sub-minute recurring intervals (every 0m runaway)**. open
  - maintainer direction: category `uncategorized`; implication `needs_llm`
  - files: `cron/jobs.py`, `tests/cron/test_jobs.py`
- **#55751: fix(cron): reject zero-interval schedules (every 0m/every 0h)**. open
  - maintainer direction: category `duplicate_of`; implication `duplicate`; refs `#42926`, `#42926`, `#42926`, `#55727`, `#55726`
  - files: `cron/jobs.py`
- **#55990: fix(cron): reject zero-duration intervals to prevent runaway jobs (#55727)**. open
  - maintainer direction: category `duplicate_of`; implication `duplicate`; refs `#42926`, `#42926`, `#55726`, `#55751`, `#55727`
  - files: `cron/jobs.py`

## Fix status

- No merged fix on record.
- Subsystem: `cron`