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Author SHA1 Message Date
0cbb01ef4b fix(security): apply the Windows path-hardening ACL that never ran (#17884)
* fix(security): apply the Windows path-hardening ACL that never ran

`buildWindowsRestrictAclArgs` invoked the hardening script as
`powershell.exe -Command <script> <path> <sid> <isDir>`. `-Command` does
not populate `$args`; it appends the trailing tokens to the command text.
The script therefore read `$args[1]` as `$null`, threw `NullArrayIndex` at
`$allowedSids[$sidText] = $true` under `$ErrorActionPreference = 'Stop'`,
and exited 1. Both callers swallowed that: the async callback was empty and
`applySecurePathRestriction` returned `true` regardless, while the sync
`catch` returned `false` and nobody logged. Every Windows secure path has
been left on its inherited ACL since the ACL was introduced (#5006), and
nothing said so.

Replace PowerShell with `icacls.exe`, which takes plain argv. That removes
the quoting surface entirely rather than escaping it: interpolating a path
into the command text would have turned a dead no-op into arbitrary
PowerShell on a filesystem path, since `-Command` executes what it appends.
It also drops the execution-policy dependency and the `powershell.exe`
spawn an EDR flags, and runs ~25x faster than the PowerShell cold start.

Hardening is now three passes: `/reset` to purge explicit ACEs that
`/inheritance:r` leaves behind, `/inheritance:r` plus a `/grant:r` per
allowed SID, then a read-back that checks the DACL is protected and grants
only the intended rights. The predecessor's verification block was equally
dead, and an apply that is never read back is only half a control.

Failures stay non-fatal — non-NTFS volumes, network paths and restricted
tokens fail legitimately and must not break startup — but they are no
longer invisible: every failure is logged, and a failed async apply now
evicts its cache entry so the next call retries instead of trusting a
success that never happened.

Routing through `runProcess`/`runProcessSync` also retires this file's
`node:child_process` allowlist entry.

* fix(security): verify the hardened ACL by identity, not by shape

Review found the bug class this PR fixes surviving inside the fix. The
verify pass checked rule count, absence of the inherited marker, and exact
rights — never *who* the rules named. Granting Everyone full control
satisfies all three, so hardening reported success on a DACL that handed
the credential to every local account, and most of the real-filesystem
tests still passed.

Verification now reads the descriptor back with `icacls /save`, which emits
SDDL with raw SIDs, and compares the principal set exactly. That is also
locale-independent by construction: the previous parse read localized
account names out of icacls' OEM-codepage stdout, where a non-ASCII path
survived by accident rather than by the documented mechanism. SDDL parsing
moves to `windows-security-descriptor.ts`.

Two further self-inflicted problems, both measured:

The post-rename re-harden led with `/reset`, which re-widened a DACL that
was already correct — the staged file's protected DACL survives the rename,
so the pass had nothing to do but open a window. Polling an external
process during a write into a relocated root caught it: the e2ee keypair
dropped to `BUILTIN\Users:(RX)` plus `Authenticated Users:(M)` — read *and*
write — before tightening again. Hardening now verifies first and returns
early when the DACL already reads back correct, which closes the window and
cuts the steady state from three spawns to one. Re-measured: 158 samples,
one DACL state, zero broad.

Evicting the cache on every failed async apply reintroduced #4901. The env
store re-hardens on the read path at ~2/s, so on a host where hardening
cannot work (FAT32, network path, restricted token) that was two icacls
spawns and two warnings a second, forever. Async retries now take a retry
floor and a hard per-path attempt cap. The write path keeps retrying
unthrottled — it is user-driven, and a failed credential ACL must still be
retried on the next write.

Also: failures route through a reporter hook that the main process points
at the diagnostic tracer, because `console.warn` reaches nothing in a
packaged GUI-subsystem build; `writeSecureFile` returns whether hardening
took, and the async branch reports `pending` rather than claiming `applied`;
a transient `whoami` failure no longer disables hardening for the process
lifetime, and the SID is shape-validated; the `/c` guard now covers the
synchronous runner too.

* fix(security): re-probe hardening instead of latching a transient failure

The per-process attempt cap added for the read-path storm was a permanent
latch: one AV scan, momentary lock or %TEMP% blip and every later credential
write in that session went unhardened, silently, on a host where hardening
would now succeed. Same defect class as #17858's computer-use host, and
worse here because what stops happening is security hardening on credential
files and nothing said so.

The retry budget now bounds the *rate*, not the lifetime: at most three
attempts per path per minute, re-probing in every later window, forever. The
transition is announced in both directions — `throttled` once per window on
entry, `recovered` when a rate-limited path hardens again — so a host stuck
in the degraded state is diagnosable rather than merely quiet. The reporter
type covers both, and the main process ends the `recovered` span
successfully rather than failing it.

Extracted to secure-path-hardening-retry-budget.ts, which keeps
secure-file.ts under its line cap without a max-lines disable.

Also confirms the second flagged risk rather than assuming it: a real
unwritable %TEMP% is now covered by a test proving verification fails
closed, reports at the `verify` stage, and still leaves the ACL applied —
so that path loses proof, not protection, and with the lifetime cap gone it
can no longer combine into a permanent-off state.

* fix(security): verify a directory's whole inheritance flag set

The flag check tested only that `OI` was present — never that `CI` was, nor
that nothing else was. That was harmless while `/reset` + `/grant` ran on
every pass and repaired whatever was there. The verify-first short-circuit
made it load-bearing: what verification accepts is now left alone, so a
latent under-check went live because a different fix started depending on
it.

Two directory DACLs passed while being wrong — both protected, three
non-inherited full-control rules, correct SIDs, differing from correct only
in their flags:

  (OI)(F)        - no CI, so subdirectories are left unprotected
  (OI)(CI)(IO)   - inherit-only, so the directory object itself grants
                   nobody anything; the next writeFileSync into it fails
                   with EPERM, on a directory just cached as hardened

Verification now compares the whole flag set, which also rejects IO and NP,
and names the offending flags in the failure. Both shapes are planted in
real-filesystem regression tests, including an assertion that a write into
the repaired directory succeeds and its child inherits. Confirmed both tests
fail against the old check and pass against this one.

* fix(security): back the hardening retry off exponentially

The fixed one-minute window bounded the retry rate but left a standing floor
of three attempts per path per minute on a host where hardening can never
succeed — FAT32/exFAT, a network path, a redirected profile. That budget is
per path and there are several secure files, so the floor multiplied into
tens of thousands of icacls spawns a day for work guaranteed to fail.

The delay now doubles after each consecutive failure, from a one-minute
floor to a thirty-minute ceiling, and the attempt cap is gone entirely: once
the backoff elapses the path is re-probed however long it has been failing.
A permanently incapable host settles at ~2 attempts/hour.

Slowing the backstop costs almost nothing, because it is not the recovery
mechanism: the synchronous write path is deliberately unthrottled, so a host
that recovers hardens on its very next credential write regardless of what
the read-path budget says.

The `throttled`/`recovered` reports are unchanged and matter more here,
since the quiet periods between probes are now much longer.

The curve is pinned in a new unit test against the exported delay function
rather than a copy of its constants, covering the doubling, the ceiling
holding at 5000 consecutive failures, a 30-day failing path still
re-probing, one announcement per degraded episode, and per-path isolation.
The integration tests keep only what they uniquely prove: that the read path
is wired to the budget, and that a day of failures still re-probes.
Confirmed four of these fail against a reinstated lifetime cap.

* ci(windows): run the real-icacls DACL suite in CI

The win32 suite only self-skips off Windows, so it passed vacuously in
every lane. Register it the way the cmd-shim suite is registered.

* fix(security): describe the cache's real cost, which is icacls now

Both cache comments still justified themselves with PowerShell -- "~1-1.5s" and
"a PowerShell spawn every read" -- in the same file whose PR removed PowerShell
from this path. The caches are still right, but for different numbers, and the
old ones are the kind an engineer would reasonably delete a cache over.

The real shape: hardening verifies first and returns early, so an already-correct
DACL costs one synchronous icacls spawn and a rewrite costs four (verify, reset,
grant, verify). Still worth caching on the read path, which polls at ~2/s.

* test(security): make the DACL suite safe to schedule

Registering this spec in the Windows lane put it under two rules it had
never been measured against.

Teardown now goes through `removeTreeSync`, which the lane's boundary test
requires, and repairs the DACLs the suite plants on purpose first: those
retries only cover transient locks, so a regressed `(OI)(CI)(IO)` repair
leaves the root un-removable and `afterAll` throws EPERM.

And the no-permission case decides by elevation before it writes anything.
`windows-2022` runs elevated, where hardening succeeds: the old branch
asserted nothing about denial and instead replaced the `hosts` DACL, then
`icacls /reset` -- which is not a restore, it drops the explicit
`SYSTEM:(F)` that file ships with. Ephemeral in CI; permanent for a
developer running the lane from an elevated shell. Now it asserts or it
skips. The probe reads the token integrity SID rather than `icacls /save`,
which succeeds unelevated (`BUILTIN\Users:(RX)` carries READ_CONTROL) and
would have skipped the case on every machine.

* fix(security): measure the hardening latches on a clock that cannot go backwards

`mayAttemptHardening` compared wall-clock times, so any backwards step --
an NTP correction, a VM snapshot restore, a user changing the clock --
made the elapsed time negative and held every failing path below its delay
until the clock caught up. Measured at the 30-minute ceiling with the clock
stepped back a year, the path was refused at +0d, +1d, +30d, +180d and
+364d, and re-probed only at +366d. That is the permanent latch the
exponential backoff was added to remove, and it contradicts the module's
own "bounds the rate without ever bounding the lifetime".

The SID lookup's own one-minute window had the identical shape and is
worse: a failed lookup makes `planFor` return null, which disables the
synchronous *write* path too, so the write-path exemption that recovers
the read-path budget cannot recover it. Both now measure elapsed monotonic
time, following the repo's existing `monotonicNowMs` spelling.

Two things the write path was not doing, both found in the same pass:

- A successful synchronous apply now records the outcome. It is exempt
  from the budget, but it was also invisible to it, so a host that had
  demonstrably recovered kept the read path backing off for up to 30
  minutes and no `recovered` transition ever came from that lane. Only
  success is recorded; recording failure would put the exempt lane back
  under the budget.
- `writeSecureFile`'s JSDoc now says its boolean covers the file only. The
  directory harden is fire-and-forget and answers `pending` on Windows
  regardless, so a `true` says nothing about the directory's ACL.

* fix(security): stop the hardening test doubles from faking a no-op

Three CI failures on this branch, one failure shape: hardening silently
does nothing and the check that should have caught it agrees.

The auth critical-path test hand-rolled a `node:child_process` factory with
`execFileSync`/`execFile`. The rewritten ACL path goes through
`runProcessSync`, i.e. `spawnSync`, which the factory never returned — so
every spawn threw into the SID lookup's bare catch, `planFor` returned null,
and hardening no-opped. It mocks `child-process/run-process` now, the
boundary production code actually calls and the one sibling ACL tests
already mock: an export missing there fails loudly by name instead of
returning undefined. Its fake icacls writes a real UTF-16LE SDDL file, so
the pinned spawn count per write is a property of the ACL path rather than
of the double. The test forces `platform='win32'`, so this failed on every
platform, Linux CI included.

`windowsSystem32Binary` is a production bug, not a test bug: it builds a
Windows path with the host `join`, which off-platform yields the mixed
`C:\Windows/System32/whoami.exe`. On Windows the two joins agree, which is
why it survived; on Linux the SID lookup's whoami match missed and 27 of
secure-file's 32 tests exercised a lane that never ran. These are always
Windows paths, so `path.win32.join` is what it should have been.

The import-boundary pin still read 160 after this branch migrated
secure-path-windows-acl.ts off `node:child_process`; the ratchet correctly
refuses a pin left above reality.

* fix(security): resolve the machine-relative SDDL alias, and stop a denied read destroying the file

Path hardening verified the DACL it wrote by comparing the SIDs `icacls /save`
reports. SDDL substitutes two-letter aliases for well-known SIDs, and the
resolution table could only hold constants -- but `LA` and `LG` name an account
by RID inside the *machine's own* SID, so on a box whose user is the built-in
Administrator (a CI runner, an Administrator-only install) the current user read
back as `LA`, matched nothing, and hardening reported failure for every path.
Resolve those two against the machine authority derived from the user SID;
without one they stay unresolved and the comparison still fails closed.

Three secret stores treated any read failure as "malformed -- regenerate" and
overwrote. A hardened file granting a SID this process does not hold reads as
EPERM while its directory stays writable, so the overwrite succeeds: renaming
over an unreadable file needs FILE_DELETE_CHILD on the parent, not DELETE on the
file. That destroyed the E2EE secret key, every paired device's bearer token,
and the plugin vault. Distinguish EPERM/EACCES from a parse failure and refuse.

Also close the async lane's unhandled rejection: `void p.then(onSettled)` turned
a throw from `onSettled` into a dead main process, and the retry budget it calls
threw whenever nothing had configured it -- a contract held only by import
order. The budget now defaults its own bounds.

* test(windows): say which ACEs icacls listed when a planted DACL fails

`toHaveLength` reports only a count and vitest elides the array, so three
preconditions failing on the CI runner said "expected 3, got 6" and nothing
about what the sixth entry was. Name the entries in the failure.

* fix(security): stop three more stores overwriting what they were denied

Same swallow-default-overwrite shape as the readers already fixed, found by
sweeping every store that reads under a hardened root.

- plugin-storage-store.ts returned `{}` on any read failure and set()/delete()
  wrote it back, losing the plugin KV store. It is the secrets store's shape
  line for line, so the two now behave identically.
- relay-revoke-outbox.ts returned [] and save() wrote it, dropping revocations
  that never reached the relay -- a revoked device stays live.
- profile-cloud-session-store.ts mapped an EPERM read onto `decrypt-failed`,
  which fails the `status === 'found'` guard in clearCloudSessionIfUnchanged and
  falls through to an rmSync of the account session. A denied read now reports
  `unreadable`, which licenses nothing; the refresh path bails on it and the
  auth status surfaces it rather than reporting a bare reconnect.

All reuse isPermissionDeniedError. The predicate stays an EPERM/EACCES allow
list rather than "ENOENT defaults, everything else throws": these stores are
meant to self-heal a truncated or malformed file, and inverting it would turn a
corrupt keypair into an app that cannot start. The distinction that matters is
"could not read it" versus "read it and it was garbage".

* test(windows): plant fixture DACLs that cannot inherit what they did not plant

%TEMP% grants [SYSTEM, Administrators, <user>] (OI)(CI)(F) by default, and those
propagate into every fixture. Three preconditions read back 4 and 6 ACEs where 3
were planted, and the extras looked like Orca's own hardening because the shape
is identical -- on a runner whose user is the built-in Administrator, the
inherited trio IS the trio production grants.

Combining /inheritance:r with /grant:r leaves the argument order to icacls, and
that combined form drops the inherited ACEs on Windows 11 but keeps them as
explicit ones on the Windows Server runner. Removing inheritance in its own
invocation makes the grant the whole DACL on either host, and the fixture root
is de-inherited once up front so nothing propagates in.

Rooting the fixtures outside %TEMP% would not have fixed this: any directory
inherits from wherever it lives. The fix is to stop inheriting, not to move.

No assertion is relaxed -- the counts stay exact.

* test(windows): pick a foreign SID that stays foreign on an elevated runner

`S-1-5-32-544` is only foreign to a token that is not an administrator. The CI
runner is elevated AND logged in as the built-in Administrator, so granting
Administrators granted the reader full control: the file stayed readable, and
all six preservation assertions went vacuous rather than proving anything.

BUILTIN\Guests is resolvable everywhere and no interactive token is a member,
so the read is denied on an unelevated developer box and on the runner alike.
An unresolvable SID would have been the stronger choice but icacls rejects one
with ERROR_NONE_MAPPED (1332).

The premise guard is what caught this -- it asserted the file was actually
unreadable instead of trusting the grant, and named elevation as the suspect.

* fix(security): refuse on any read that never reached the contents, not just a denied one

isPermissionDeniedError becomes isUnreadableError, because "permission denied"
was never the concept -- "could not read it", as opposed to "read it and it was
garbage", is. EBUSY, EMFILE, ENFILE and EIO say exactly as little about a file's
contents as EACCES does, and they fell into the branch that regenerates and
overwrites. On Windows EBUSY is the likelier of the two: antivirus holding a
credential open at the moment of a startup read produces it, which makes it a
commoner path to the same permanent loss than the ACL case that motivated the
original fix.

Still an allow list, deliberately: ENOENT keeps licensing a create, and a parse
failure keeps self-healing. The stores are built to recover from a truncated
write, and turning that into a refusal would trade a recoverable state for an
unrecoverable one on the startup path.

Also fixes the regression suite's own premise on an elevated runner:
makeUnreadable combined /inheritance:r with /grant:r, and that form keeps
%TEMP%'s inherited [SYSTEM, Administrators, user] as explicit ACEs on Windows
Server -- so the file stayed readable and all six assertions were vacuous. Same
split-the-invocation fix as the ACL suite's planter.

* test(windows): skip the preservation suite where a read cannot be denied

An elevated token logged in as the built-in Administrator reads straight through
a DACL that grants it nothing -- confirmed on the CI runner against both
BUILTIN\Administrators and BUILTIN\Guests, and with the grant split into its own
icacls invocation so the DACL really was the planted one. On such a host the
premise these tests rest on does not hold, and every assertion would pass while
proving nothing.

So probe once at module scope and skip rather than assert vacuously -- the same
trade the ACL suite already makes for its unelevated-only case. The gate stays
in the compound `<win32 check> && <flag>` form the win32 lane ratchet detects, so
the file stays registered in both lane lists.

Coverage is not lost where it counts: isUnreadableError has unit tests that run
on every platform and every host, and the stores' refusal is exercised in full on
any machine where a denial is reproducible -- which is every developer box.

---------

Co-authored-by: Orca Worker <orca-worker@localhost>
Co-authored-by: Neil <4138956+nwparker@users.noreply.github.com>
2026-09-05 21:13:06 -07:00
NeilandOrca 879aad7dd6 oom(foundation): bound shared readers/limits + add BoundedMap primitive (#10299)
* oom(01): A1-shared-readers — reintroduce #10179 subset

Files: 18 applied, 0 deleted (from 6eb70d8370)

Co-authored-by: Orca <help@stably.ai>

* oom(02): A2-shared-image-media — reintroduce #10179 subset

Files: 7 applied, 0 deleted (from 6eb70d8370)

Co-authored-by: Orca <help@stably.ai>

* oom(03): A3-shared-fs-listing — reintroduce #10179 subset

Files: 21 applied, 0 deleted (from 6eb70d8370)

Co-authored-by: Orca <help@stably.ai>

* oom(04): A4-shared-remote-relay — reintroduce #10179 subset

Files: 8 applied, 0 deleted (from 6eb70d8370)

Co-authored-by: Orca <help@stably.ai>

* oom(05): A5-shared-misc — reintroduce #10179 subset

Files: 28 applied, 0 deleted (from 6eb70d8370)

Co-authored-by: Orca <help@stably.ai>

* oom(06): B-shared-wiring — reintroduce #10179 subset

Files: 81 applied, 0 deleted (from 6eb70d8370)

Co-authored-by: Orca <help@stably.ai>

---------

Co-authored-by: Orca <help@stably.ai>
2026-07-24 21:36:57 -07:00
NeilandOrca aab112933e Revert "fix(memory): bound OOM-prone accumulators (#10179)" (#10255)
Co-authored-by: Orca <help@stably.ai>
2026-07-23 18:35:31 -07:00
Neil 8f40ddf328 fix(memory): bound OOM-prone accumulators (#10179) 2026-07-23 06:22:56 -07:00
NeilandOrca 46646d7ff1 chore(lint): upgrade oxlint to 1.71 + enable 7 new rules (autofixed backlog) (#6841)
* chore(lint): upgrade oxlint to 1.71 and enable 7 new rules

Upgrade oxlint 1.67.0 -> 1.71.0 (1.72 was blocked by the repo's 3-day
minimum-release-age supply-chain guard; nothing here needs it). The
bump is a no-op on the existing config.

Enable 3 error rules (backlog autofixed to zero in this commit) and
4 warn rules (surface signal without gating CI):

error (autofixed, behavior-preserving):
- unicorn/prefer-node-protocol        (~1531 sites: bare builtin -> node:)
- typescript/no-import-type-side-effects (~36: all-inline-type -> import type)
- unicorn/no-array-reverse            (19: copy-then-reverse -> toReversed)

warn (real signal, current fires are test-only/correct):
- unicorn/no-array-fill-with-reference-type  (aliasing footgun guard)
- typescript/no-unsafe-function-type         (bans bare Function type)
- unicorn/prefer-array-flat-map              (map().flat() -> flatMap())
- unicorn/prefer-regexp-test                 (.match() in bool ctx -> .test())

mobile/.oxlintrc.json extends root, so it inherits all 7; the autofix
ran from root and covered mobile/ too.

Verification (all green): oxlint 0 errors (root+mobile+aux configs),
oxfmt clean, typecheck (node+cli+web), vitest 22795 passed / 0 failed,
builds (electron-vite + web + cli) succeed. node: rewrites confirmed to
skip embedded SSH/CLI string payloads (AST-only); all toReversed sites
verified to operate on fresh copies or write-once locals.

* chore(lint): bump mobile oxlint to 1.71 so inherited rules parse

mobile/ is a standalone pnpm project pinning its own oxlint@1.67, which
lacks unicorn/no-array-fill-with-reference-type (needs >=1.70). Since
mobile/.oxlintrc.json extends the root config, mobile CI's 'cd mobile &&
oxlint' failed to parse the new rule. Bump mobile to match root (1.71).

Verified in mobile/: oxlint 0 errors, oxfmt --check clean, tsc --noEmit
pass, vitest 978 passed / 0 failed.

Co-authored-by: Orca <help@stably.ai>

---------

Co-authored-by: Orca <help@stably.ai>
2026-06-29 22:38:29 -07:00
0ec3882cb8 Add project Windows runtime selection (#5519)
* Add project Windows runtime selection

* Fix project Windows runtime selection

Co-authored-by: Orca <help@stably.ai>

* fix: preserve WSL shell variables

---------

Co-authored-by: Jinwoo-H <jinwoo0825@gmail.com>
Co-authored-by: Orca <help@stably.ai>
Co-authored-by: Neil <neil@stably.ai>
2026-06-17 16:08:14 -07:00
4d6c291eff fix(windows): stop main-thread PowerShell ACL storm on env-store reads (#5011)
* fix(windows): stop main-thread PowerShell storm on env-store reads

Two changes fix the v1.4.52+ Windows performance regression (#4901 regression
against #4840) where 49 powershell.exe processes were spawned in 27 seconds
during load, saturating the Electron main thread and causing black terminals
and runtimeEnvironments:call timeouts.

Root cause: `readEnvironmentStore` calls `hardenExistingSecureFile` on every
read. The env-store parent directory's mtime churns constantly (every secure
write updates it), so the mtime-keyed idempotency cache never matched →
`bestEffortRestrictWindowsPath` (powershell, ~1-1.5s synchronous) fired on
every call. After #4901, the remote-runtime tab-sync loop reads the store
~2×/s, turning sporadic mtime misses into a continuous main-thread storm.

Fix 1 – path-cached directory hardening: add `hardenedDirectoryPathsThisProcess
(Set<string>)` that caches directory hardening by PATH for the process lifetime.
A directory's required ACL does not change when its mtime changes; only file
hardening retains the metadata-keyed cache so post-rename inode changes are
detected correctly.

Fix 2 – async ACL application: replace `execFileSync(powershell.exe, ...)` with
`execFile` (fire-and-forget). PowerShell cold-start is ~1-1.5s; the function is
already named `bestEffortRestrictWindowsPath` so async/optimistic caching is
correct. `applySecurePathRestriction` returns `true` optimistically on win32 so
the cache entry is written before the background process completes.

Tests: new regression tests verify the directory is hardened exactly once even
when its mtime changes between calls, that unchanged files are not re-hardened,
and that ACL application goes through async execFile (not execFileSync).

* fix(windows): apply credential-file ACL synchronously on write path

Follow-up rigor on the env-store PowerShell ACL storm fix (#5006). The
read-path storm fix (path-cached async directory hardening + async file
re-harden) is retained, but switching ALL ACL application to async opened a
narrow Windows-only security window: because writeFileSync({mode}) is a no-op
on Windows, writeSecureFile returned with the credential file still carrying
the parent directory's inherited (broader) ACL for the ~1-1.5s PowerShell
cold-start, affecting the e2ee keypair, device registry, and runtime env auth
store.

Fix: apply the credential FILE's ACL synchronously (execFileSync) on the
infrequent write path, before the atomic rename publishes it, and cache the
path as hardened only on confirmed success so a failed apply retries. Keep the
DIRECTORY hardening async + path-cached for the process lifetime (that is what
killed the #4901/#5006 main-thread storm). The read path's existing-file
re-harden stays async + metadata-cached (fires at most once per file, no storm).

Also:
- Document the dir-path cache process-lifetime known limitation (deleted+
  recreated dir not re-hardened until restart).
- Remove the redundant double dir-cache write in writeSecureFile.
- Add docs/windows-secure-file-acl-hardening.md describing the sync-file/
  async-dir model and a manual Windows e2e test plan (the cross-platform
  Playwright harness runs on Linux and cannot reach the PowerShell path).

Tests (src/shared/secure-file.test.ts, 13 passing): credential file hardened
synchronously while dir stays async (no async file-ACL window); failed sync
file-ACL apply is not cached and retries; dir hardened exactly once across many
writes despite mtime churn; no PowerShell spawned on non-win32.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

* fix: keep POSIX secure directory hardening metadata-aware

---------

Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Co-authored-by: Neil <4138956+nwparker@users.noreply.github.com>
2026-06-09 01:47:29 -07:00
Lesley MurfinandJinwoo Hong 3d013e48e8 fix(windows): slow launch + keystroke stalls — main process synchronously spawns powershell to re-harden env-store ACLs (#4840)
* fix(windows): stop synchronous powershell ACL spawns blocking the main thread

markEnvironmentUsed re-hardened the env-store on every runtime round-trip,
spawning powershell.exe ~5x synchronously (~1-1.5s each) and freezing the
Windows UI on launch and every keystroke. Throttle the non-security lastUsedAt
write (60s window; runtimeId changes bypass) and make path hardening idempotent
per process. ACL hardening is preserved; post-rename credential hardening still
always runs. ~14.0s -> ~6.8s launch; main thread 95.7% blocked -> 99.0% idle.

* Fix secure-file hardening cache retries

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Co-authored-by: Jinwoo Hong <73622457+Jinwoo-H@users.noreply.github.com>
2026-06-07 21:47:54 -04:00
Jinjing bcddccae2b fix: harden shared platform helpers (#3877) 2026-05-30 16:32:05 -07:00