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Allow providers to be layered at one mount point. Reads search layers in priority order, while writes copy lower-layer files to the first provider and deletions hide lower copies without changing them. Assisted-by: pi Signed-off-by: Matteo Collina <hello@matteocollina.com>
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Additional details and impacted files@@ Coverage Diff @@
## main #66235 +/- ##
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- Coverage 90.28% 90.26% -0.03%
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Files 790 790
Lines 271642 273319 +1677
Branches 51846 52213 +367
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+ Hits 245260 246700 +1440
- Misses 16889 17062 +173
- Partials 9493 9557 +64
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…t model
vfs 0.5 ("align userland VFS mounts and fs hooks with Node.js") mounts the
way core node:vfs does: mount() takes no path and returns a mount point in a
reserved namespace under os.devNull, so a path is served by one VFS or by
the disk, never both. Core's docs give the reason — no mounted layer may
shadow a real directory — and say VFS is no security boundary.
- FsProvider.mount() returns the mount point; the overlay option goes (0.5
calls it shim-only, core has none), so the node:vfs swap stays one file.
- runNodeInProcess no longer mounts: it mounted an empty overlay at the cwd
and never wrote into it, so every read and write already went to disk.
- The provider tests address files under the returned mount point and pin
that a mounted provider never shadows a real path.
- The vfs hold in renovate.json is dropped; docs describe the mount model and
core's open layered-mount work (nodejs/node#66235) as the path to a RAM
overlay of the cwd.
- staleNames: two identifiers the dependency skill cited that no longer exist.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_019dwem6ZLsMCyc52v9UbhFV
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Allow providers to be layered at one mount point. Reads search layers in priority order, while writes copy lower-layer files to the first provider and deletions hide lower copies without changing them.
AI gen, reviewed by me.