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swarm-controller: create every agent's subagent stream

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swarm-controller now creates `term-sub-<agent>` for every agent a hive is
declared to run, at start and every minute after, with the config
`swarm_queue_client::subagent_term::open_or_create` spells (subjects
`$SWARM.term.<agent>.sub.>`, max_age 24h). An existing stream is opened as
it is, as the controller does for its other streams and buckets, under the
`$JS.API.STREAM.CREATE.*` grant it already holds.

The agent no longer creates the stream: its token is granted publish on
`$SWARM.term.<agent>.sub.>` and no `$JS.API.STREAM.CREATE|INFO` subject,
and the subagent daemon only publishes. A `CREATE` carries the stream's
config in its payload, which no subject grant narrows, so the agent could
otherwise pick the stream's subjects and limits.
This commit is contained in:
atlas 2026-10-02 23:34:27 +02:00 • committed by mara
commit 318f67cda9
13 changed files with 135 additions and 102 deletions
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14
nix/host-modules/swarm-nats.nix
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@ -844,16 +844,12 @@ in
# on a hive presents that one, so it cannot be scoped to one
# agent's key.
"--agent-token-publish-subject ${lib.escapeShellArg "\$\$KV.agent-icons.{agent}"}"
# Its subagents' terminal rows, and the one stream that keeps
# them (`swarm_queue_client::subagent_term`). The agent's
# subagent daemon creates the stream on first use, so it gets
# `CREATE` and `INFO` on that stream name alone: no `UPDATE`,
# no `DELETE`, no consumer, no other stream. A `CREATE`'s
# config travels in its payload, which no subject grant can
# narrow.
# Its subagents' terminal rows
# (`swarm_queue_client::subagent_term`), publish only and no
# `$JS.API.*` subject: swarm-controller creates the
# `term-sub-{agent}` stream that keeps them, so its subjects
# and limits are never the agent's to choose.
"--agent-token-publish-subject ${lib.escapeShellArg "\$\$SWARM.term.{agent}.sub.>"}"
"--agent-token-publish-subject ${lib.escapeShellArg "\$\$JS.API.STREAM.CREATE.term-sub-{agent}"}"
"--agent-token-publish-subject ${lib.escapeShellArg "\$\$JS.API.STREAM.INFO.term-sub-{agent}"}"
"--store-cert-role ${lib.escapeShellArg authCertRole}"
];
# Every credential arrives by `LoadCredential` and is named