fix: stop propagating deletions from folders we could not sync (BR-2245) - #1493
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The rule was whether we can create the item, but we create placeholders through `\?\` paths, which skip the win32 name parsing. A trailing space or dot is stored verbatim and explorer, which does parse, then looks for the trimmed name and reports that the folder does not exist: the folder the user can see and cannot delete in BR-1796. Measured against real windows, of the names we were unsure about only the trailing ones become unreachable, and control characters fail on creation with EINVAL. So this adds trailing dots and control characters, and stops rejecting a leading space, which survives win32 parsing and was making us skip the folder and every item below it for nothing. The infra test creates the folder and asks windows instead of trusting the documentation, so the rule set cannot drift back into rejecting names that work. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01P4iw5oSur6jH4zdQX7zg44
When `updateFolderPlaceholder` fails, `traverse-depth-first` skips the whole subtree, so from that moment the local tree stops representing the remote one and nothing records it. In the customer's logs that meant 8.037 of 30.988 files on disk while the app reported the sync as complete. This keeps a record of those folders so we can later refuse to act on anything below them. We store the local path when we know it, because that is the one the watcher reports and it can differ from the remote one, which is usually why the reconciliation failed in the first place. The entry is dropped as soon as the folder reconciles again, and the store is cleared on logout. Nothing consumes the record yet. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01P4iw5oSur6jH4zdQX7zg44
`checkIfMoved` treated the reconciliation as done whenever `rename` did not throw, but rename can return without an error and leave the folder where it was. When that happens `needsToBeMoved` asks for the same move again on the next pass, and again after that: 1.183 times on a single folder in the customer's logs, without one error logged. The only reliable signal that a move worked is that it stops being requested, so we count consecutive attempts of the same origin to destination pair. The pair, rather than the folder, separates a retry from new work: when a move succeeds the origin on the next pass is already a different path, so renaming a folder repeatedly from the web resets the count while a move that never takes effect keeps adding to it. After ten attempts we stop trying and report the folder as unreconciled. The limit is deliberately generous because a move also fails for transient reasons, such as a file held open inside the folder, and those resolve on their own. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01P4iw5oSur6jH4zdQX7zg44
`onUnlink` sent every local deletion straight to the server, one to one, with no check: 121 `Folder unlinked` events became 122 delete requests. Inside a folder we could not reconcile that is wrong, because we never materialized its subtree, so a local deletion there does not mean the user deleted the remote items, it can just as well be us failing to keep the placeholders in sync. On 16 May 2026 that turned into 3.387 events in five seconds and 3.351 items in the cloud trash. Now a deletion whose path is a folder we could not reconcile, or anything below it, is dropped and logged instead of being sent. The comparison ignores case because the path the watcher reports and the one stored while traversing can differ in case and still be the same folder. `watcher-on-unlink-unreconciled` covers the chain end to end with the native watcher: a rename that genuinely fails with the destination taken, the folder being marked, a real deletion on disk, and the assertion that nothing reaches the server. The first test in that file is the control, and asserts that an ordinary deletion still propagates. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01P4iw5oSur6jH4zdQX7zg44
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📝 WalkthroughWalkthroughThe change adds unreconciled-folder tracking, move-attempt limits, placeholder reconciliation updates, deletion guards, logout cleanup, Windows name validation coverage, and ADR support files. ChangesUnreconciled folder synchronization
Priority: ⬇️ Low Estimated code review effort: 4 (Complex) | ~45 minutes Change: Bug fix Sequence Diagram(s)sequenceDiagram
participant FileWatcher
participant onUnlink
participant UnreconciledFolders
participant RemoteSync
FileWatcher->>onUnlink: unlink path
onUnlink->>UnreconciledFolders: check path
UnreconciledFolders-->>onUnlink: unreconciled status
alt path is unreconciled
onUnlink-->>FileWatcher: skip deletion propagation
else path is reconciled
onUnlink->>RemoteSync: propagate deletion
end
Suggested reviewers: Merge Risk: 🔵 Low · up to The new ADR guidance creates minor maintenance ambiguity but does not affect runtime behavior, so the PR remains mergeable with a documentation fix. 🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
Full details: Docstring CoverageExplanation Docstring coverage is 7.14% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 14 functions across 21 files. (5 skipped: 5 unsupported.)
✨ Finishing Touches🧪 Generate unit tests (beta)
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In `@src/context/virtual-drive/items/validate-windows-name.ts`:
- Line 27: Update the unaddressableEnding pattern used by validateWindowsName to
match only trailing ASCII space (U+0020) or period, not JavaScript’s broader \s
Unicode whitespace set, so addressable names containing other trailing
whitespace remain valid and updateFolderPlaceholder can reconcile them.
In `@src/node-win/watcher/tests/watcher-on-unlink-unreconciled.test.ts`:
- Around line 45-47: Update the afterEach cleanup in the watcher tests to remove
rootPath for every test, and also remove remotePath for the failed-move case.
Preserve the existing parent cleanup and use the established directory-removal
helper.
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📒 Files selected for processing (21)
src/apps/main/auth/logout.tssrc/backend/features/local-sync/watcher/events/unlink/on-unlink.test.tssrc/backend/features/local-sync/watcher/events/unlink/on-unlink.tssrc/backend/features/remote-sync/file-explorer/check-if-moved.test.tssrc/backend/features/remote-sync/file-explorer/check-if-moved.tssrc/backend/features/remote-sync/file-explorer/update-folder-placeholder.test.tssrc/backend/features/remote-sync/file-explorer/update-folder-placeholder.tssrc/backend/features/remote-sync/unreconciled-folders/defs.tssrc/backend/features/remote-sync/unreconciled-folders/index.tssrc/backend/features/remote-sync/unreconciled-folders/services/add-unreconciled-folder.tssrc/backend/features/remote-sync/unreconciled-folders/services/clear-move-attempts.tssrc/backend/features/remote-sync/unreconciled-folders/services/is-inside-unreconciled-folder.test.tssrc/backend/features/remote-sync/unreconciled-folders/services/is-inside-unreconciled-folder.tssrc/backend/features/remote-sync/unreconciled-folders/services/remove-unreconciled-folder.tssrc/backend/features/remote-sync/unreconciled-folders/services/track-move-attempt.test.tssrc/backend/features/remote-sync/unreconciled-folders/services/track-move-attempt.tssrc/backend/features/remote-sync/unreconciled-folders/store.tssrc/context/virtual-drive/items/validate-windows-name.infra.test.tssrc/context/virtual-drive/items/validate-windows-name.test.tssrc/context/virtual-drive/items/validate-windows-name.tssrc/node-win/watcher/tests/watcher-on-unlink-unreconciled.test.ts
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In `@package.json`:
- Line 207: Add and track the referenced internxt-drive-desktop-core-1.0.1.tgz
artifact at the package path used by the `@internxt/drive-desktop-core` file
dependency, ensuring installations can resolve it before merge.
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package.jsonpackages/core
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| "@headlessui/react": "^1.4.2", | ||
| "@iconscout/react-unicons": "^2.2.5", | ||
| "@internxt/drive-desktop-core": "file:packages/core/internxt-drive-desktop-core-1.0.0.tgz", | ||
| "@internxt/drive-desktop-core": "file:packages/core/internxt-drive-desktop-core-1.0.1.tgz", |
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🎯 Functional Correctness | 🟠 Major | ⚡ Quick win
🔎 Supported by static analysis
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#!/bin/bash
set -euo pipefail
artifact="packages/core/internxt-drive-desktop-core-1.0.1.tgz"
git ls-files --error-unmatch "$artifact" >/dev/null
test -f "$artifact"
tar -tzf "$artifact" | grep -Fx 'package/package.json' >/dev/null
tar -xOzf "$artifact" package/package.json \
| jq -e '(.name == "`@internxt/drive-desktop-core`") and (.version == "1.0.1")'Repository: internxt/drive-desktop
Length of output: 298
🏁 Script executed:
#!/bin/bash
set -euo pipefail
printf '%s\n' 'Tracked and present core artifacts:'
git ls-files 'packages/core/*internxt-drive-desktop-core*.tgz' || true
find packages/core -maxdepth 1 -type f -name '*internxt-drive-desktop-core*.tgz' -print 2>/dev/null || true
printf '%s\n' 'Dependency references:'
rg -n -C 2 '`@internxt/drive-desktop-core`|internxt-drive-desktop-core-1\.0\.[01]\.tgz' package.json packages/core 2>/dev/null || trueRepository: internxt/drive-desktop
Length of output: 541
Add the referenced core tarball before merge.
packages/core/internxt-drive-desktop-core-1.0.1.tgz is neither present nor tracked. The file: dependency can therefore make installation fail.
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In `@package.json` at line 207, Add and track the referenced
internxt-drive-desktop-core-1.0.1.tgz artifact at the package path used by the
`@internxt/drive-desktop-core` file dependency, ensuring installations can resolve
it before merge.
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| stopRemoteNotifications(); | ||
| LocalSync.SyncState.onLogout(); | ||
| clearUnreconciledFolders(); |
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I would leave the name onLogout because it is the proper, given name and it would be easier to navigate. No?
| }; | ||
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| export function addUnreconciledFolder({ uuid, path }: Props) { | ||
| store.folders.set(uuid, path); |
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isnt it better to add the unreconciled folder here normalized so in src/backend/features/remote-sync/unreconciled-folders/services/is-inside-unreconciled-folder.ts you dont have to iterate through all of them hoping for a match? this way the lookup for an unreconciled folder in isInsideUnreconciledFolder goes from o(nFolders) to o(1)? that could save some time down the line
| @@ -0,0 +1,8 @@ | |||
| /** | |||
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I would rename this folder to constants to keep consistence along the project
| export function onLogout() { | ||
| clearStore(); | ||
| } |
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Isnt it better to just export and use clearStore and give the proper use where we consume it??
…izing docs: record the decision not to sanitize windows names (BR-2245)
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In `@docs/adr/README.md`:
- Line 9: Update the accepted-ADR policy in the README to explicitly allow the
old ADR’s superseded status and reciprocal cross-links to be added when a new
decision replaces it, while keeping all other accepted-ADR content immutable.
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.adr-dir.prettierignoredocs/adr/0001-record-architecture-decisions.mddocs/adr/0002-do-not-sanitize-windows-names-for-unaddressable-items.mddocs/adr/README.md
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| They are plain markdown, numbered in the order they were taken. Nothing is needed to read them. | ||
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| **They are never edited once accepted.** If a decision is replaced, the new record supersedes the old one and both are updated to link to each other; the old one stays where it is, marked as superseded. The history is the point. |
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📐 Maintainability & Code Quality | 🟡 Minor | ⚡ Quick win
Resolve the accepted-ADR update policy conflict.
This line prohibits edits to accepted ADRs, then requires an edit to the old ADR when a new ADR supersedes it. Authors cannot follow both instructions. Define the superseding-status and cross-link update as an explicit exception.
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[style] ~9-~9: ‘new record’ might be wordy. Consider a shorter alternative.
Context: ...epted.** If a decision is replaced, the new record supersedes the old one and both are upd...
(EN_WORDINESS_PREMIUM_NEW_RECORD)
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In `@docs/adr/README.md` at line 9, Update the accepted-ADR policy in the README
to explicitly allow the old ADR’s superseded status and reciprocal cross-links
to be added when a new decision replaces it, while keeping all other
accepted-ADR content immutable.
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The repository heads an explanatory comment with the release it was written for and who wrote it, not with the ticket. Follow that. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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Problem
A folder whose name cannot be reconciled enters a rename loop that never converges.
updateFolderPlaceholderreturnsfalseand the traversal abandons the entire subtree,silently, so a large share of the account never makes it to disk. When that content later
disappears from disk, the watcher reads it as a user deletion and replicates it to the
server 1:1, with no checks at all — thousands of deletion events within seconds, and the
same number of items sent to the cloud trash.
What this PR does
Validate windows names by what windows can address. The rule is now whether windows can
reach the name, not whether it can create it. We create placeholders through
\\?\paths,which skip win32 name parsing, so a trailing space or dot is stored verbatim and explorer
then cannot find it — that is BR-1796, a folder the user can see and cannot delete. Adds
trailing dots and control characters; stops rejecting a leading space, which is addressable.
Track folders we could not reconcile. When a folder's reconciliation fails we store its
local path, which is the one the watcher reports and can differ from the remote one — that
difference is usually why it failed in the first place.
Convergence counter. Today
checkIfMovedtreats the reconciliation as done ifrenamedoes not throw. That is not true: it can return without an error and leave the folder where
it was. When that happens
needsToBeMovedasks for the same move again on the next pass,and again after that — over a thousand times on a single folder in the logs we analysed,
without a single error logged.
The only reliable signal that a move worked is that it stops being requested: if the
rename at 13:30 had taken effect, there would be nothing left to move at 13:41.
So we count consecutive attempts of the same origin to destination pair. The pair, rather
than the folder, is what separates a retry from new work: if the move succeeded, the origin
on the next pass is already a different path, because the folder has a different name. A
user renaming a folder five times from the web produces five different pairs and resets the
counter each time; a move that never takes effect repeats the same pair and adds up.
After 10 attempts we stop trying and mark the folder, so the guard in point 4 covers its
subtree. The limit is deliberately generous, because a move can also fail for transient
reasons — a file held open inside the folder, for instance — and those resolve on their own
and reset the count.
Guard on deletion propagation. A local deletion inside a folder we could not reconcile
is not sent to the server.
What it fixes
counter would have marked it and the guard would have stopped every propagated deletion.
CfCreatePlaceholdersloop caused by a trailing dot, which ran for over a thousanditerations and was never detected.
What it does NOT fix
reported, but the subtree is still pruned. The fix is name sanitising, which will go in a
branch on top of this one: create the placeholder with the name win32 can actually reach
(
Report.->Report) so the subtree syncs. The link tothe cloud does not break, because reconciliation goes by uuid, but it does require
needs-to-be-movedandon-unlinkto compare the sanitised name.measured and pending: normal use never exceeded 6 propagated deletions per minute, while the
four incidents were 15, 33, 53 and 58. It was left out of this PR because notifying the user
relies on an Electron notification carrying a
TODO: Notification is not workingsincev2.5.3, and we need to settle where the warning surfaces first.
Pending outside this repo
The
INVALID_WINDOWS_NAMEstrings inpackages/core(en/es/fr) say "start/end with spaces";they should now say "end with a space or a dot". Needs a PR against the submodule.
Tests
699 unit tests and 33 infra tests. The infra one creates the folder and checks against real
windows whether it is addressable, so the rule set cannot drift back towards the documentation.
watcher-on-unlink-unreconciledreproduces the whole chain with the native watcher: a renamethat genuinely fails, the folder being marked, a real deletion on disk, and the assertion that
nothing reaches the server.
Summary by CodeRabbit
Bug Fixes
Tests
Documentation