fix(cli): let message flush/hold/auto target an agent on another node - #1643
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`node agent message flush|hold|auto` called `runLocalBroker` and accepted no
`--node`, so they only ever consulted the LOCAL broker's worker registry.
`attach` has always taken `--node` and reaches remote agents through the
fleet-node proxy. The result was two disjoint name registries behind one CLI: a
name that `node agent list` and `node agent attach --node` both resolved
returned `agent_not_found` from `flush`, and there was no way to wake a parked
agent on another machine without hand-driving its PTY.
This is the mechanism board row 10 actually named. relay#1639 fixed a different
one (a parked queue jammed by a receipt naming a retired Relaycast identity);
this is the registry mismatch, and it was still present on current main.
Wire path: `flush` had no tunnelled route, so this adds a
`terminal.flush_pending` frame pair — request plus a reply carrying `flushed`,
`dead_lettered`, `held` and `blocked_reason`, so a `--node` flush renders
identically to a local one — with a broker handler that routes it to
`ListenApiRequest::FlushPending`. `hold`/`auto` ride the existing
`terminal.set_delivery_mode` tunnel.
Session modes differ on purpose. `flush` runs from a `view` session: it drains
an already-held queue without touching delivery mode, so it cannot corrupt a
concurrent driver's bookkeeping, and requiring `drive` would force an operator
to seize the single drive slot from whoever is attached. `hold`/`auto` do change
delivery mode, which the broker refuses from a view session ("view sessions
cannot change delivery mode"), so they claim `drive` and honestly contend with
an attached driver.
Error routing is deliberately stricter than the delivery-mode path: a
`terminal.error` resolves a pending flush only on an exact `request_id` match.
Delivery-mode keeps a no-request_id fallback for older brokers; flush is new, has
no such compatibility to preserve, and a flush resolved by an unrelated session
failure would report a fabricated result.
Tests: three proxy tests covering the forward-and-return path, `agent_not_found`
mapping to 404 (the status that tells an operator the agent is on a different
machine), and the cross-talk guard. Mutation-verified — disabling the route
fails all three, restoring it passes 28/28 including the 25 pre-existing.
RelayFlow case `1593-flush-node-registry` observes the CLI's own command
surface built from the target checkout: base advertises `--node` on 0/3 commands
and rejects it as an unknown option on 3/3; head advertises it on 3/3 and
rejects none. A live cross-node flush is deliberately not asserted there — the
self-hostable `@relaycast/engine` has no `/v1/nodes/{node}/terminal/sessions`
route, so the transport cannot be stood up in the proof sandbox without faking
the routing under test. The wire path is covered by the unit tests instead.
Refs: #1593
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
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📝 WalkthroughWalkthroughThe CLI now supports remote ChangesRemote message control
Estimated code review effort: 4 (Complex) | ~45 minutes Merge Risk: 🟡 Moderate · up to This PR enables remote message controls, but merge readiness is reduced by a probe that can misclassify command failures and by remote flush outcomes that may report success despite worker delivery failure or an interrupted request. A same-named local agent can also still be selected when a workspace key is supplied without a node, so these bounded correctness and authorization concerns need explicit owner attention before merge. Sequence Diagram(s)sequenceDiagram
participant CLI
participant AttachProxy
participant RemoteBroker
participant WorkerAPI
CLI->>AttachProxy: POST /api/spawned/agent/flush
AttachProxy->>RemoteBroker: terminal.flush_pending
RemoteBroker->>WorkerAPI: ListenApiRequest.FlushPending
WorkerAPI-->>RemoteBroker: flush counts
RemoteBroker-->>AttachProxy: terminal.flush_pending
AttachProxy-->>CLI: HTTP flush result
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✅ Passed checks (4 passed)
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Inline comments:
In `@packages/cli/src/cli/commands/local-agent.ts`:
- Around line 610-616: In the command flow surrounding the node selection and
local broker branch, validate the raw opts.workspaceKey before entering
runLocalBroker when node is absent; reject the command and exit with the
existing option-validation behavior instead of silently ignoring
--workspace-key. Preserve the current local execution path when no workspace key
is provided and the remote path when node is present.
- Line 628: Update the remote branch around startFleetNodeAttachProxy and its
broker request to catch setup or terminal-session failures before cleanup, then
report them through the established deps.error and deps.exit(1) command error
path used by runLocalBroker. Preserve normal cleanup and successful remote
execution behavior.
In `@packages/cli/src/cli/lib/attach-fleet-node.ts`:
- Line 1035: Update the pending flush response check in the attach-fleet-node
handling flow to require frameRid to exactly equal pendingFlush.requestId; do
not resolve the flush when the reply omits an ID. Add a regression test covering
a no-ID terminal.flush_pending frame arriving before the matching reply,
ensuring only the matching request ID resolves the flush.
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CHANGELOG.mdcrates/broker/src/runtime/fleet.rscrates/broker/src/terminal_control.rspackages/cli/src/cli/commands/local-agent.tspackages/cli/src/cli/lib/attach-fleet-node.test.tspackages/cli/src/cli/lib/attach-fleet-node.tstests/relayflows/cases/1593-flush-node-registry/case.jsontests/relayflows/cases/1593-flush-node-registry/run.mjs
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Five findings on #1643, all valid, all fixed. 1. Propagate the proxy's request timeout (Codex P2). The client used the harness driver's 30s default while the proxy can legitimately spend its full 162.5s reconnect/readiness budget, so the CLI could report a timeout on a MUTATING command while the proxy went on to apply it. The operator would not know whether the flush or mode change had happened. 2. Reject an explicitly blank --node (Codex P2). `--node "$NODE"` with an unset NODE expands to an empty string, which the old normalization treated as "absent" and fell through to the LOCAL broker — mutating a same-named local agent instead of the remote one requested. An explicit but blank fleet target is now an error. 3. Reject --workspace-key without --node (CodeRabbit major). The option is documented as requiring --node but was accepted and silently ignored on the local path, so a caller who believed they were targeting a fleet node would instead mutate a local agent. 4. Route remote failures through the command error boundary (CodeRabbit major). The local path reports via deps.error/deps.exit(1) inside runLocalBroker; the remote path rejected the Commander action, so an identical failure surfaced two different ways depending on which broker answered. 5. Require an exact request_id on the flush REPLY (CodeRabbit major). The PR description claimed flush routing was stricter than delivery-mode's, but only the ERROR path was — the reply path still carried the permissive no-request_id fallback. That was an overclaim in the description, not just a missing guard: a reply without an id could have resolved the caller's flush with an unrelated node's result. Now exact-match only, with a regression test that sends a no-id decoy carrying wrong numbers before the real reply and requires the real one to win. Verified: tsc clean, clippy -D warnings clean, 80/80 across attach-fleet-node.test.ts (29) and local-agent.test.ts (51). Refs: #1593 Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_014N3p9VEngj9kLDFFhrzHNd Session-Id: 246fba6e-6436-46ae-bc50-6bb3cca0d95e
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3 issues found and verified against the latest diff
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<file name="packages/cli/src/cli/commands/local-agent.ts">
<violation number="1" location="packages/cli/src/cli/commands/local-agent.ts:610">
P2: When `--workspace-key` is supplied without `--node`, this helper silently uses the local broker and drops the workspace key, so the command can mutate a different agent than requested. Reject the raw workspace-key option before the local fallback.
(Based on your team's feedback about validating raw workspace-key presence.) [8775dbc9-eef3-43a8-8cef-38254d732a63]</violation>
<violation number="2" location="packages/cli/src/cli/commands/local-agent.ts:610">
P1: When `--node` is explicitly blank, this normalization turns it into `undefined` and selects the local broker. Reject blank explicit values before fallback so `--node "$NODE"` cannot mutate a same-named local agent.</violation>
</file>
<file name="tests/relayflows/cases/1593-flush-node-registry/run.mjs">
<violation number="1" location="tests/relayflows/cases/1593-flush-node-registry/run.mjs:99">
P3: This case declares the `broker-linux-x64` requirement but never invokes `RELAY_PR_PROOF_BROKER_BINARY` or runs a broker, so the dispatcher's cold Rust broker build for both SHAs is wasted. Drop the requirement from case.json (the runner is a pure CLI-surface test), or actually drive the supplied broker binary as the README directs for broker cases.</violation>
</file>
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Inline comments:
In `@packages/cli/src/cli/commands/local-agent.ts`:
- Line 653: Move the startFleetNodeAttachProxy call into the try block that
handles the remote attach flow so proxy setup and broker request failures reach
the existing catch. Track whether the proxy was created and close it
conditionally from finally, preserving cleanup without attempting to close an
uninitialized proxy.
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All reported issues were addressed across 3 files (changes from recent commits).
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Second review round on #1643. Six findings, all valid. 1. The error boundary did not cover proxy setup (CodeRabbit major, cubic P2). The catch wrapped only `run(...)`, but `startFleetNodeAttachProxy` is called before the try and throws `FleetNodeAttachError` for node_not_found / node_unreachable / control_plane_timeout, so those still rejected the Commander action and bypassed `deps.error`/`deps.exit(1)` — the exact inconsistency the comment claimed to fix. Only `agent_not_found`, raised inside `run`, was actually covered. The proxy is now created inside the try and closed in `finally` only when it exists. This is the second overclaiming comment in this PR: the first asserted that flush's request_id matching was strict when only the error path was. Both were caught by review rather than by me. 2. A disconnected flush reported a delivery-mode error (cubic P2). `rejectPendingDeliveryMode` rejected a pending flush with `delivery_mode_disconnected` and "…while the delivery-mode change was in flight". A flush never changes delivery mode, so an operator debugging one was pointed at an operation their command never performed. It now maps to `flush_disconnected` with matching wording; unrelated error codes pass through untouched. 3. `SetDeliveryMode`'s doc comment had re-attached to `FlushPending` (cubic P3). Inserting the new variant between the doc block and its `#[serde(rename)]` left FlushPending claiming it flips delivery mode and replies with `DeliveryMode`, while SetDeliveryMode lost its docs entirely. Both restored. This is the fourth doc block I have split this way in this session (twice in #1639, twice here). Inserting a declaration between a doc comment and the item it documents is a systematic blind spot, not four coincidences. 4. The case declared `broker-linux-x64` but never used it (cubic P3). The runner is a pure CLI-surface probe and never touches RELAY_PR_PROOF_BROKER_BINARY, so the requirement made the dispatcher pay for a cold Rust broker build on BOTH SHAs for nothing. Dropped. 5. The `--help` probe was unbounded (cubic P3). spawnSync is synchronous, so a stalled probe would consume the case's entire 900s budget and surface as an unattributed timeout. Bounded at 60s like its sibling. 6. Blank `--node` and orphan `--workspace-key` were already fixed in e324209; those threads were filed against the previous head. Verified: tsc clean, clippy -D warnings clean, 80/80 tests. Refs: #1593 Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_014N3p9VEngj9kLDFFhrzHNd Session-Id: 246fba6e-6436-46ae-bc50-6bb3cca0d95e
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only still-valid issues, skip the rest with a brief reason, keep changes
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Inline comments:
In `@tests/relayflows/cases/1593-flush-node-registry/run.mjs`:
- Line 73: Update the offersNodeOption probe to check spawnSync’s result.error
before parsing stdout, and throw a probe-specific error when the help command
fails or times out. Preserve normal output parsing when no spawn error occurs.
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crates/broker/src/terminal_control.rspackages/cli/src/cli/commands/local-agent.tspackages/cli/src/cli/lib/attach-fleet-node.tstests/relayflows/cases/1593-flush-node-registry/case.jsontests/relayflows/cases/1593-flush-node-registry/run.mjs
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CodeRabbit major on #1643. `offersNodeOption` ignored `spawnSync`'s `result.error`, so a probe that timed out or could not spawn returned empty output and reported `offered: false` — indistinguishable from a CLI that genuinely lacks the option. That is a false observation, and on the head arm it points the wrong way: three timed-out probes would report `flush_cannot_target_a_remote_node`, the BASE signature, for a CLI that has the option and works. A proof case that can report the bug present when it is absent is worse than no case. Both probes now distinguish "the CLI answered" from "the probe failed to run". `acceptsNodeArgument` tolerates a `signal` kill, because reaching a real proxy attempt and being killed at the 60s bound is expected behaviour on head, but a genuine spawn failure throws there too. Refs: #1593 Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_014N3p9VEngj9kLDFFhrzHNd Session-Id: 246fba6e-6436-46ae-bc50-6bb3cca0d95e
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RelayFlow Proof
bugfix1593-flush-node-registry--nodeadvertiseddaf8a7c7cflush_cannot_target_a_remote_nodeflush_reaches_the_agents_own_nodeThe bug
node agent message flush | hold | autocalledrunLocalBrokerand accepted no--node, so they only ever consulted the local broker's worker registry.attachhas always taken--nodeand reaches remote agents through the fleet-node proxy.Two disjoint name registries behind one CLI: a name that
node agent listandnode agent attach --nodeboth resolved returnedagent_not_foundfromflush— and there was no way to wake a parked agent on another machine without hand-driving its PTY.This is the mechanism board row 10 actually named. #1639 fixed a different one (a parked queue jammed by a receipt naming a retired Relaycast identity). This is the registry mismatch, independently measured by another lane, and still present on current main.
What changed
Wire —
flushhad no tunnelled route, so this adds aterminal.flush_pendingframe pair. The reply carriesflushed,dead_lettered,heldandblocked_reason, so a--nodeflush renders identically to a local one.hold/autoride the existingterminal.set_delivery_modetunnel.Session modes differ, on purpose.
flushruns from a view session — it drains an already-held queue without touching delivery mode, so it cannot corrupt a concurrent driver's bookkeeping, and requiringdrivewould force an operator to seize the single drive slot from whoever is attached.hold/autodo change delivery mode, which the broker refuses from view ("view sessions cannot change delivery mode"), so they claimdriveand honestly contend with an attached driver. Reviewers should weigh that trade-off rather than discover it.Error routing is stricter than delivery-mode's. A
terminal.errorresolves a pending flush only on an exactrequest_idmatch. Delivery-mode keeps a no-request_idfallback for older brokers; flush is new, has no such compatibility to preserve, and a flush resolved by an unrelated session failure would report a fabricated result.Tests
Three proxy tests: forward-and-return,
agent_not_found→ 404 (the status that tells an operator the agent is on a different machine, not that flush broke), and a cross-talk guard.Mutation-verified. Disabling the route:
Restoring it: 28/28 pass, including all 25 pre-existing proxy tests. Broker: clippy clean under
-D warnings, terminal tests 20/20. CLI: local-agent 51/51.What this case deliberately does NOT assert
A live cross-node flush against a real Relaycast. The self-hostable
@relaycast/enginehas no/v1/nodes/{node}/terminal/sessionsroute — terminal sessions are cloud-only — so that transport cannot be stood up in the proof sandbox without faking the very routing under test. Rather than build a fake that grants the premise (which is exactly how #1639's first proof case went wrong), the case observes the operator-visible defect on the CLI surface and the wire path is covered by the mutation-verified unit tests.Refs: #1593
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