Add dependabot cooldown and open pr limit [WHIT-3369]#2544
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govuk-dependabot-auto-merger will soon require the dependabot config to include a cooldown period for it to merge external dependendcies. This commit adds a 3 day cooldown to all package ecosystems.
This is an [incident action](https://docs.google.com/document/d/1D-j1Z-p7C-tK5rkYcesOCaqGqRhM7JEfMCSisLdsJf4/edit?tab=t.0). As per [the docs](https://docs.github.com/en/code-security/reference/supply-chain-security/dependabot-options-reference#open-pull-requests-limit-)... > Dependabot default behavior: > If five pull requests with version updates are open, no further pull requests are raised until some of those open requests are merged or closed. > Security updates have a separate, internal limit of ten open pull requests which cannot be changed. > > When open-pull-requests-limit is defined: > Dependabot opens pull requests up to the defined integer value. A large value can be set to effectively remove the open pull request limit. Raising the limit to 25 as agreed in https://gov-uk.atlassian.net/browse/WHIT-3369, in line with other repos.
GDSNewt
approved these changes
May 7, 2026
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Adds a dependabot cooldown of 3 days and increases the upper limit on dependabot PRs to 25, as agreed in https://gov-uk.atlassian.net/browse/WHIT-3369