💭 Looking at the code changes between commits, I can see that require("node:fs") has been added to BrowserImport.ts, isLockHeld is now properly using the FileSystem service, and there's been a refactoring around the cookieDatabasePath shim. There's a new issue emerging in BrowserImport.ts with how the Node.js fs module is being imported. The problem is that require("node:fs") with statSync creates a hidden runtime dependency that bypasses the FileSystem service entirely—this violates the abstraction layer. Plus, using require in an ESM package is problematic. I need to check what the actual file contents look like now to understand the full scope of this issue. I'm spotting a problematic require("node:fs") call in the service constructor—it's a hidden runtime dependency that should go through the FileSystem service instead. Since the package is ESM, require shouldn't even be available here. This is the same kind of issue that was flagged before in Sources.ts and apparently crept back into BrowserImport.ts. There's also a missing Effect.provide(platformServices) call that needs to be added based on the earlier comment at line 183. Let me verify that Sources.ts now properly uses FileSystem and check whether the catchIf usage there is justified—it looks like it's inspecting platform error reason tags, which should be acceptable for structural predicates. I also need to confirm the cookieDatabasePath shim has been fully removed and search for any lingering require calls in Sources.ts. I found a clear violation in BrowserImport.ts where the service constructor uses require("node:fs") with statSync, which is a hidden runtime dependency that bypasses the FileSystem service already available through platformServices. This also won't work in ESM. The fix is to use a file existence check through the FileSystem service within an Effect.provide call, iterating through the candidate paths to find the database. I'm working through the implementation details—the FileSystem.exists method returns an Effect that needs error handling, so I need to use orElseSucceed to default to false when a file doesn't exist. The approach is to extract the FileSystem from the context, check each candidate path, and then find the first one that exists. Finishing the code suggestion... I should verify that the tests cover the new behavior changes properly, and check whether error.reason is a valid property on PlatformError in this Effect version. The BrowserImport service interface looks correct with the fix applied. I'll post the review noting the failure state.

1. modify_pr — One convention violation found: the new cookie-database probe in BrowserImport.importCookies bypasses the Effect environment with require("node:fs") + statSync.