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feat: Tidy Go modules after every Renovate Go update - #35
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Renovate's Go updates change go.mod and go.sum but leave stale hashes for the old module behind, and sometimes miss a hash a code generator needs. Every Go repository checks that go mod tidy is a no-op, so those pull requests, security fixes included, sat red until someone pushed go mod tidy by hand (instrumentation#13, search#133, ramp-provider#2, dns-operator#438). Key features/changes: - Add the built-in gomodTidy post-update option for the gomod manager - Both milo-os and datum-labs inherit this preset through their org configs, so one rule covers all three organisations gomodTidy runs inside Renovate's Go manager, so the hosted app needs no command allowlist for it, unlike postUpgradeTasks. Related to datum-cloud/infra#8211
kevwilliams
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Nov 1, 2026
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Verified gomodTidy is a built-in postUpdateOption scoped to the gomod manager, so no allowlist is needed and other managers are untouched.
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Summary
Renovate's Go updates leave stale or missing hashes in the module checksum file, so each one fails its repo's tidy or code-generation check until someone runs go mod tidy by hand.
Four updates sat red this way last week, three of them security fixes: milo-os/instrumentation#13, milo-os/search#133, milo-os/ramp-provider#2 and datum-cloud/dns-operator#438.
Renovate now runs go mod tidy itself after every Go update, in every repository of datum-cloud, milo-os and datum-labs, since all three inherit this policy.
The option is built into Renovate's Go support, so the hosted Renovate app needs no command allowlist for it.
Test plan
Related to datum-cloud/infra#8211