Files
orca/src
JinjingandOrca 6fbb6f300e fix(ssh,relay): stop remote connections from being killed by backoff and frame caps
Three independent connection killers found in the SSH/remote freeze audit.

FINDING A - the reconnect ladder never escalated for post-handshake drops.
scheduleReconnect() used the single published state.reconnectAttempt for both
the delay index and the give-up test, and runReconnectAttempt() zeroed it
before connecting (ssh.ts gates the relay redeploy on 0-at-connected). Every
post-handshake drop therefore re-entered at 1000ms forever, ~3600 relay
redeploys/hour, and 'reconnection-failed' was unreachable for a flapping host.
New SshReconnectLadder splits the delay index (advanced by every retry) from
the failure streak (advanced only by a failed handshake), so flaps back off
while give-up semantics stay byte-identical to shipped.

FINDING B - notify() closed the client whenever a frame exceeded the producer
frame capacity, conflating a permanently un-sendable frame with transient
backpressure. A 5000-event fs.changed is 425KB against a 49KB cap, so the
watcher flood killed the link and re-killed on every reattach+replay. notify()
now drops and logs once per generation; fs.changed is chunked to each sink's
capacity with a control-lane overflow marker as the resync fallback; agent-hook
envelopes shed lastAssistantMessage/interactivePrompt/subagents to fit.

FINDING B2 - sendResponse routed >1MB responses to a lane whose admission
ignores the frame cap and closed the client on rejection, so a large
fs.listFiles dropped the SSH host. It now substitutes a JSON-RPC error so the
request fails instead of the connection.

Also moves fs.streamEnd/fs.streamError to the control lane so a terminal frame
cannot be dropped by the producer-lane check.

Co-authored-by: Orca <help@stably.ai>
2026-07-31 22:10:27 -07:00
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