fix(app-router): match Next.js cached navigation shells#1916

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NathanDrake2406 wants to merge 19 commits into

cloudflare:mainfrom

NathanDrake2406:nathan/segment-cache-cached-navigations

Commits on Jun 11, 2026

Commits on Jun 12, 2026

fix(app-router): stabilize cached navigation shell reuse
NathanDrake2406
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Merge remote-tracking branch 'upstream/main' into nathan/segment-cache-cached-navigations
NathanDrake2406
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refactor(app-router): extract static navigation shell cache
NathanDrake2406
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refactor(app-router): reuse static param helpers
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fix(app-router): guard cached shell seed identity
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test(app-router): cover unsafe shell seed responses
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fix(app-router): harden static shell cache
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test(app-router): cover shell cache lifecycle guards
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fix(app-router): always pass static shell page props
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fix(app-router): skip empty partial shell seeds
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test(app-router): reject empty partial shell seeds
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fix(app-router): preserve complete cached static shells
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refactor(app-router): share build-time layout flag resolution
NathanDrake2406
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refactor(utils): share route params validation
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fix(app-router): resolve build-time layout flags after probing
NathanDrake2406
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Commits on Jun 13, 2026