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Predictable Dependabot #106

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Merged
CleanCut merged 2 commits into from
Jan 15, 2026
Merged

Predictable Dependabot #106

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4275a19
set dependabot to run at 05:00 UTC on the first Sunday of the month
CleanCut Jan 8, 2026
c54cf85
switch to known-working syntax
CleanCut Jan 9, 2026
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6 changes: 4 additions & 2 deletions .github/dependabot.yml
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Original file line number Diff line number Diff line change
Expand Up @@ -8,9 +8,11 @@ updates:
- package-ecosystem: "cargo"
directory: "/"
schedule:
interval: "monthly"
interval: "cron"
cronjob: "0 5 2 * *" # Second day of each month at 05:00 UTC
Comment on lines +11 to +12
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Copilot AI Jan 9, 2026

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The field name cronjob is not valid for Dependabot configuration. According to GitHub's Dependabot documentation, when using interval: "monthly", you should specify day and time fields instead. Dependabot does not support arbitrary cron expressions. The valid configuration would be:

interval: "monthly"
day: "first"
time: "05:00"

Note that this would run on the first day of the month. If you need to run on the first Sunday specifically, Dependabot's schedule configuration does not support that level of granularity - it only supports "first day of month" for monthly updates.

This issue also appears in the following locations of the same file:

  • line 17

See below for a potential fix:

      interval: "monthly"
      day: "2"
      time: "05:00" # Second day of each month at 05:00 UTC

  - package-ecosystem: "github-actions"
    directory: "/"
    schedule:
      interval: "monthly"
      day: "2"
      time: "05:00" # Second day of each month at 05:00 UTC

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Copilot AI Jan 9, 2026

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The comment states "Second day of each month" but the PR description states the intent is to run on "the first Sunday of the month". There is a mismatch between the stated intent and the implementation. Additionally, the cron expression 0 5 2 * * would mean the second day of the month, not the first Sunday.

This issue also appears in the following locations of the same file:

  • line 18

See below for a potential fix:

      cronjob: "0 5 1-7 * 0" # First Sunday of each month at 05:00 UTC

  - package-ecosystem: "github-actions"
    directory: "/"
    schedule:
      interval: "cron"
      cronjob: "0 5 1-7 * 0" # First Sunday of each month at 05:00 UTC

Copilot uses AI. Check for mistakes.

- package-ecosystem: "github-actions"
directory: "/"
schedule:
interval: "monthly"
interval: "cron"
cronjob: "0 5 2 * *" # Second day of each month at 05:00 UTC