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drive-running-node

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更新时间2026年7月23日 23:12

Resolve exactly one running StreamLib node and health-check it with a live `graph` round-trip, then pin its `--url` / `--node` so every following control verb targets the same node. Use at the start of a session against a running app — after `discover-running-nodes`, or whenever you are about to inspect, tap, submit, replace, connect, or capture and need a confirmed target locked in. Wraps `streamlib nodes` then `streamlib graph`.

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tatolab

tatolab/streamlib

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drive-running-node

Turns "some node is running" into "this specific node answers, and here is how I address it." A graph call is the cheapest full control-plane round-trip, so it doubles as the health check: if graph returns the live topology, the node is drivable.

Steps

1. Find the candidates

streamlib nodes

Read the RUNTIME_ID and CONTROL_URL of the row you want (see discover-running-nodes for the columns). Copy one identifier — either the runtime_id (for --node) or the control_url (for --url).

2. Health-check + pin the target

Pick ONE addressing form and reuse it verbatim on every later verb:

By registry runtime_id:

streamlib graph --node <runtime_id>

By explicit control URL:

streamlib graph --url <control_url>

If exactly one node is live, both flags may be omitted and the resolver uses that sole node:

streamlib graph

A JSON graph dump (processors, links, states, metrics) means the node is healthy and the address is good. A non-zero exit means it is not drivable:

no live StreamLib nodes found — nothing is running; start a node.
N live nodes found; disambiguate with --node ... or --url ... — more than one is live and you passed neither flag; re-run with a specific --node/--url.
no registered node with runtime_id <id> — the --node value is wrong or the node exited; re-run streamlib nodes.
A transport/HTTP error — the endpoint is unreachable or auth failed (set STREAMLIB_MCP_TOKEN).

3. Pin it for the rest of the session

Record the chosen --node <runtime_id> (preferred — stable across a port change) or --url <control_url>, and pass the same flag to every subsequent verb (inspect-live-graph, tap-live-channel, author-and-submit-processor, hot-swap-live-processor, capture-node-evidence, teardown-running-node).

Notes

Prefer --node <runtime_id> over --url when several nodes may be live — it is unambiguous and survives the ApiServer's port auto-increment.
STREAMLIB_MCP_TOKEN, when set, rides as the bearer token on the round-trip; export it once for the whole session.

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Write a brand-new processor from source and submit it into a running StreamLib node as a fresh instance, optionally wiring its ports to existing processors in one transactional step, then confirm it landed and is producing. Use when adding a new stage to a live pipeline during development — a new filter, sink, or generator — without restarting the app. Wraps `streamlib submit` then `graph` + `tap` to confirm.

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name

drive-running-node

description

drive-running-node

Steps

1. Find the candidates

streamlib nodes

2. Health-check + pin the target

Pick ONE addressing form and reuse it verbatim on every later verb:

By registry runtime_id:

streamlib graph --node <runtime_id>

By explicit control URL:

streamlib graph --url <control_url>

If exactly one node is live, both flags may be omitted and the resolver uses that sole node:

streamlib graph

A JSON graph dump (processors, links, states, metrics) means the node is healthy and the address is good. A non-zero exit means it is not drivable:

no live StreamLib nodes found — nothing is running; start a node.
N live nodes found; disambiguate with --node ... or --url ... — more than one is live and you passed neither flag; re-run with a specific --node/--url.
no registered node with runtime_id <id> — the --node value is wrong or the node exited; re-run streamlib nodes.
A transport/HTTP error — the endpoint is unreachable or auth failed (set STREAMLIB_MCP_TOKEN).

3. Pin it for the rest of the session

Notes

Prefer --node <runtime_id> over --url when several nodes may be live — it is unambiguous and survives the ApiServer's port auto-increment.
STREAMLIB_MCP_TOKEN, when set, rides as the bearer token on the round-trip; export it once for the whole session.