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changesets: split phased app follow-up notes

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Split the combined phased app changeset into package-specific entries so each published package describes only its own adopter-facing change.

Signed-off-by: Patrik Oldsberg <poldsberg@gmail.com>
Made-with: Cursor
This commit is contained in:
Patrik Oldsberg
2026-03-14 21:30:32 +01:00
parent 3c6436cba0
commit 5b160f97db
4 changed files with 15 additions and 7 deletions
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.changeset/prepare-specialized-app-frontend-app-api.md
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'@backstage/frontend-app-api': patch
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Added `prepareSpecializedApp` for two-phase app wiring so apps can render a bootstrap tree before full app finalization. The bootstrap phase now supports deferred `app/root.elements`, predicate-gated APIs, reusable `sessionState`, and warnings for bootstrap-visible predicates or bootstrap code that accessed APIs that only became available after finalization.
.changeset/prepare-specialized-app-frontend-defaults.md
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'@backstage/frontend-defaults': patch
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Updated `createApp` to use the phased `prepareSpecializedApp` flow, allowing apps to render a bootstrap tree before the full app is finalized.
.changeset/prepare-specialized-app-frontend-plugin-api.md
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'@backstage/frontend-plugin-api': patch
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Added support for `if` predicates on `createFrontendPlugin` and `createFrontendModule`, applying shared conditions to every extension in the feature. Plugin and extension overrides can now also replace or remove existing `if` predicates.
.changeset/prepare-specialized-app-signin-flow.md
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'@backstage/frontend-app-api': patch
'@backstage/frontend-defaults': patch
'@backstage/frontend-plugin-api': patch
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Adds `prepareSpecializedApp` as a new two-phase app wiring API for rendering a bootstrap tree before full app finalization. The bootstrap phase is exposed as a partial app tree through `getBootstrapApp()`, while `onFinalized()` provides a one-way handoff to the finalized app once bootstrap completes. The opaque reusable `sessionState` is returned from the finalized app and can be passed into a future `prepareSpecializedApp` call to skip sign-in and reuse the prepared session. Conditional `app/root.elements` and predicate-gated APIs are now deferred until finalization, while unsupported bootstrap-visible predicates are downgraded to warnings and bootstrap extensions now surface warnings if they accessed APIs that only became available after finalization. The `if` option is also now supported on `createFrontendPlugin` and `createFrontendModule`, and is applied to each extension from that feature together with any extension-level predicate. Plugin and extension overrides can now also replace or remove existing `if` predicates. The existing `createSpecializedApp` API is now deprecated and backed by `prepareSpecializedApp().finalize()`, while `createApp` has been updated to use the same prepare/finalize flow.