feat(changeset-hygiene): opt-in transitive re-export config#42
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Lets caller repos opt in via .changeset/hygiene.json to suppress the
"extra package declared" warning when a downstream re-exporter
legitimately needs to bump alongside its upstream. Targets cases the
workspace graph can't see — e.g. Gradle api(project(":x")) re-exports
where a downstream artifact must be republished to deliver an upstream
change to its own consumers.
Schema:
{ "transitiveReExports": { "<upstream>": ["<downstream>", ...] } }
Backward-compatible: repos without the file behave exactly as before.
Motivating case: PostHog/posthog-android#525
Piccirello
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May 21, 2026
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turnipdabeets
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May 22, 2026
Declares posthog-android and posthog-server as transitive re-exporters
of posthog so the hygiene check stops flagging them as 'extra' when
declared in a changeset alongside posthog without their own source
changes.
Both modules declare api(project(":posthog")) in Gradle and must
republish to deliver upstream core changes to their Maven consumers.
Config schema added in PostHog/.github#42.
Triggered by warning on #525.
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Problem
The hygiene check flags downstream packages declared in a changeset without source changes of their own as "extra" — but that's a false positive when the downstream legitimately needs to republish to deliver an upstream change to its consumers.
Motivating case: PostHog/posthog-android#525
posthog-androiddeclaresapi(project(":posthog"))in Gradle. Whenposthogships a public API change,posthog-androidmust be republished so its Maven POM points at the new core version — otherwise Android consumers don't get the feature. The hygiene script can't see Gradle deps and warns "Changeset declaresposthog-androidbut no source files in that package changed."Changes
.changeset/hygiene.json:{ "transitiveReExports": { "<upstream>": ["<downstream>", ...] } }<upstream>has source changes AND is declared in the changeset, declarations of its listed re-exporters are no longer flagged as "extra".Edge cases preserved