Neil a46b5b15ec fix(worktree): ask the execution host whose home a remote delete would take (#19865)
* fix(worktree): ask the execution host whose home a remote delete would take

`isDangerousWorktreeRemovalPath` read `os.homedir()` — the machine running
Orca — and then applied POSIX-only shape rules. SSH orphan cleanup feeds it
remote paths, so a Windows host profile (`C:\Users\bob`) was unrecognised from
a macOS/Linux desktop and the recursive delete lost its last guard, while a
coincidental client-home prefix could refuse a legitimate remote delete.

The removal route already resolves one execution host for the whole removal;
it now resolves one home authority the same way. `WorktreeRemovalHomeAuthority`
is `{ kind: 'client' }` or `{ kind: 'executionHost'; homePath }`, required at
every guard entry point, so the ambient read is unreachable from a remote
removal. The host's answer is the `$HOME` the SSH session already read on the
host during relay deploy — no new probe. Unresolved stays `null`, meaning
unknown, never "same as this client's".

Path-shape rules now cover Windows profiles (`C:\Users`, `C:\Users\<name>`,
any drive or UNC root, case-insensitively) and WSL UNC aliases, which front a
Linux filesystem and so take the POSIX shapes.

Fixes #18275

* fix(worktree): merge the duplicated removal-route import

The focused code-quality plugins deny `import/no-duplicates`.

* test(worktree): pin the IPC removal call site and the unknown-host-home refusal

Mutation testing found four survivors in the home guard:

- Swapping the IPC unregistered-removal call site to the client's home passed
  every suite while the remote delete could reach the host's own home. Only
  the runtime call site was pinned. Add the mirror test for the IPC path.
- Falling back to os.homedir() when the execution host reported nothing was
  indistinguishable from refusing; the client home never coincided with the
  probed path. Assert the fallback stays off with homedir pinned to the path.
- Comparing an execution-host home across path syntaxes survived because no
  row exercised the win32 home under POSIX ops: path.resolve manufactures
  <cwd>/C:/Users/bob, which every ancestor of the cwd contains.
- Dropping the bare /Users rule survived; add the row.

Also cover the forward-slash C:/Users/bob form normalizeRemoteHome reports
for a Windows host, which no existing row used.

* ci: re-run after an unrelated Electron probe startup timeout

* fix(lint): clear the casting and max-lines gates on the home guard

Rebasing onto main brings two gates this branch predates:
typescript/consistent-type-assertions at assertionStyle: never, and the
300-line ceiling that the added home lookup pushed
orca-runtime-remove-managed-worktree.ts past. The fixture casts carry
per-site SAFETY rationales; the route's git-options-and-listing step
moves into its own module, which also stops the local/SSH branch being
spelled twice in one expression.

* fix(lint): name the home predicate for what it matches

main enabled anti-slop/no-shape-in-symbol-names (#20785) after this
branch was written. The predicate answers whether a path IS a home root,
not whether it resembles one.

* fix(worktree): refuse a removal the execution host cannot vouch for

Review of the home guard found three ways it still let a delete proceed on
evidence about the wrong machine, or on no evidence at all.

`getPathOps` switches to win32 as soon as EITHER the worktree path or the repo
path looks Windows-absolute, and `//nas/share/repo` does. A POSIX worktree path
was then judged by Windows-only shape rules, which recognise `<root>\Users\<name>`
and nothing else, so `/home/alice` — and any client home outside `\Users` —
stopped matching and the last guard in front of a recursive delete went quiet.
The home question involves the worktree path and a home, never the repo path, so
the predicate now reads the path in its own syntax as well and refuses if either
reading names a home. A union of refusals can only ever refuse more.

An execution host that never reported its `$HOME` is `unverifiable`, and
`unverifiable` does not authorise a delete. `isRemovalHomeAuthorityResolved`
gates the two paths that recursively delete a directory —
`canSafelyRemoveOrphanedWorktreeDirectory` and
`canCleanupUnregisteredOrcaLeftoverDirectory` — because the orphan proof they
accept, a `.git` file at the top of a directory, is also what a bare-repo
dotfiles `$HOME` looks like, and there the guard is the only evidence there is.
`git worktree remove` is deliberately not gated: the host's own Git registry
already established that the path is a linked worktree of that repo, and a
missing second opinion does not retract a first one. An empty `$HOME` is
normalised to unanswered rather than read as a resolved home.

The IPC entry point spelled its host two ways. The metadata prune, the
archive-hook route and now the home authority came from
`getRepoExecutionHostId(repo)`, while the `git worktree list` and every delete
came from raw `repo.connectionId`. A row carrying only
`executionHostId: 'ssh:<target>'` therefore listed a remote checkout on this
client and deleted a same-named local path while the guards vouched for the
remote one; the mirror row did the reverse (#11163, previously fixed on the
runtime path only). Neither spelling is evidence about the other, so a row that
carries two host names is refused before anything is listed or deleted. Both
sides are spelled by `getRepoExecutionHostId`, so they can differ on content but
never on normalisation.

A `runtime:<env>` row refuses here for the same reason. It is not reachable
through this handler today — the renderer sends environment targets to
`worktree.rm`, and the host-qualified catalog refuses to list a runtime host —
so that arm closes a door rather than changing a flow.

Fixtures that register an SSH provider now report a host home, because a
connected relay session always has one: `remoteCliBridgeEnv` is assigned before
`registerSshGitProvider`, is never cleared, and providers are unregistered
before the session leaves `activeSessions`. The wiring lives in its own module
called from the harness rather than in `worktrees-test-module-mocks`, which
`vi.mock` factories import: reaching the production route module from there
pulls in `providers/ssh-git-dispatch` while it is being mocked, and the module
runner deadlocks.

* fix(worktree): compare removal host names after decoding, not as stored text

`getRepoExecutionHostId` returns a row's `executionHostId` as stored, while the
same row's `connectionId` is re-spelled through `toSshExecutionHostId`, which
percent-encodes. A byte compare of the two would refuse a perfectly consistent
row over a `%20`, so the two host ids are now compared after `parseExecutionHostId`
has decoded the target id out of each.

`runtime:<env>` and an unparseable id decode to no machine at all and match
nothing, including each other — a runtime-owned row has a null `connectionId`
and would otherwise read as local, which is a delete on this client.

* fix(lint): clear the static-analysis gates on the removal home authority

The type-aware audit rejects a `default` arm on a discriminated switch, so the
host-kind switch names `runtime` and `undefined` outright — which also makes a
host kind added later a compile error here rather than a silent fallthrough.

The two test casts the changed-code gate flagged are gone: the leftover-cleanup
meta is typed instead of asserted, and the unparseable-host-id case narrows to
`ExecutionHostId` with the SAFETY rationale the gate asks for.

* docs(worktree): say why an unroutable removal host is refused by a plain compare

The comparison refuses `runtime:<env>` because only the left operand can name
no machine — `repoRowHostId` comes from `connectionId` and is always `local` or
an `ssh:` id. That invariant was doing the work silently; an explicit null test
in its place was a branch no input can reach, so the reason is written down
instead.

* fix(worktree): gate the registered removal on the host home answer too

I argued `git worktree remove --force` did not need the host's home answer,
because the host's own Git registry had already established that the path is a
linked worktree of that repo. That is true and it is not enough: `git worktree
add` accepts a pre-existing empty directory, and that directory can afterwards
be somebody's `$HOME` — a build account's home, a container's `HOME=/workspace`.
Being a linked worktree proves provenance, not that the path is not a home, and
the remove deletes the checkout either way.

With the host's answer that case is already caught by containment. Without it
only the path shapes remain, and a home at a non-standard location
(`/var/home/<u>`, `/export/home/<u>`, `D:\\Profiles\\<u>`) has no shape to match.
So `findRegisteredDeletableWorktree` now requires the answer as well, and every
gate that authorises a delete is on the same rule.

The fixture that models a connected relay session moves out of `ipc/` and is
shared: four runtime specs register an SSH provider without one, and a live
provider implies a reported home in production.
2026-09-16 22:24:10 -07:00
2026-05-04 20:42:03 -07:00
2026-03-16 22:27:51 -07:00
2026-03-28 10:19:14 -07:00

Orca Orca

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The AI Orchestrator for 100x builders.
Run Codex, ClaudeCode, OpenCode or Pi side-by-side — each in its own worktree, tracked in one place.

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License

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Orca is the ADE for working with a fleet of parallel agents. Run any coding agent with your own subscription. Available on desktop, mobile and remote runtime.
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