feat(sandbox): manifest sandbox config parsing and validation (#301) - #306
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… manifest Adds SandboxCapabilities, NetworkPermission, FilesystemPermission and ResourceLimits models parsed from the manifest "sandbox" block, plus SandboxPolicy validation enforced in LocalExtensionRegistry loading and marketplace install flows (issue #301, Block E M1).
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ZhuchkaTriplesix
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Jul 27, 2026
feat(sandbox): manifest sandbox config parsing and validation (#301)
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Summary
SandboxCapabilities,NetworkPermission,FilesystemPermission,ResourceLimitsmodels parsing thesandboxblock frommanifest.json(Block E spec format), with safe defaults andunknownfallbacks for unrecognized valuesSandboxPolicyenforcing security limits:processengine and network access only for database drivers,scratch_onlyfilesystem access, scratch <= 100 MB, memory <= 512 MB, file descriptors <= 64LocalExtensionRegistrynow skips extensions whose sandbox declaration violates policy (with debug logging), and bothMockMarketplaceRepository.install()andHttpMarketplaceRepository.install()throwMarketplaceExceptionfor such manifestsCloses #301
Test plan
flutter test test/core/extensions/ test/core/market/— 36 tests passflutter test test/features/extensions/— passflutter analyze(local analyzer crashes due to environment inotify limit, unrelated to changes)