Opening Orca's own checkout over SSH cannot list its files in one response frame.
22,617 tracked paths average 58 characters, so the 20,001-row page the client asks
for serializes to 1,223,415 bytes — past `DISPATCHER_CONTROL_QUEUE_MAX_BYTES`, so
`sendResponse` demotes it to the `legacy-response` lane, where an unrelated
producer backlog can refuse it as an opaque `ResponseOverCapacity`. Break-even is
around 49 characters of average path; any `packages/<name>/src/...` monorepo is
over the line.
Picking a ceiling to refuse at does not fix that, it just moves where it shows up
and refuses listings that would have been delivered. `__streamResponse` already
exists for exactly this on the git methods, and it is its own negotiation in both
directions: an old client never sends it and gets the plain array on the
legacy-response lane as before, and an old relay ignores it and answers plainly,
which the client detects by the sentinel marker being absent. So fs.listFiles opts
into it — no new method, no new opcode, nothing to advertise — and the size of a
listing stops being a correctness question.
The response-stream registry becomes one per relay, shared by FsHandler and
GitHandler. A second registry is not an option and the header of
git-response-stream.ts says why: a client keys reassembly on `streamId` alone, so
two would hand out the same id and cross-feed chunks, and only the handler that
registers `git.responseAck` can credit the window a pump parks on.
Also declares `maxResults` on the runtime-RPC `files.listAll` and forwards it.
The mechanism "the client names its cap, so a full page reads as truncation" was
wired only on the Electron IPC hop; web and mobile were saved incidentally by
`remoteFileContentBudget` defaulting the cap inside `listRuntimeFiles`. A new
optional field is additive in both directions (wire rule 1).
The new Docker-gated spec is claimed by run-ssh-docker-e2e.mjs. The sharded e2e
lanes set no ORCA_E2E_SSH_DOCKER, so a Docker-gated spec that no runner names
self-skips everywhere and still reports green — pr-e2e-gate-contract enforces that.
Closes#12547
Neil
f737f3499f