Agent was a single field on Dag/DagSpec, making a DAG structurally
one-agent — a multi-agent op could only ever be N separate DAGs. Move it
onto Node/NodeSpec (and the NodeView wire type), drop it from Dag/DagSpec
(and DagView): a DAG can now span agents.
- lifecycle lease keys on the node's agent, still globally exclusive per
agent across all DAGs (Inner.leases unchanged in shape). A DAG holds one
lease per distinct agent it touches; settle() frees each at DAG-terminal
(per-agent-subgraph early release is a follow-up, only observable with
multi-agent DAGs).
- transient guard keyed (dag_id, agent); cancel-revert + Rebuilt events
walk TerminalDag.agents.
- submit-time dedup removed (a multi-agent DAG has no single agent to key
on); every submit enqueues a fresh DAG. Whether dedup needs reintroducing
is tracked in a follow-up sub-issue.
- templates gain a node(agent, kind, deps) helper stamping the agent onto
every node; meta templates stamp "hyperhive".
Templates stay single-agent in this PR — behaviour is unchanged, only the
representation + wire shape. Multi-agent DAG emission (restart/restart-all/
broad stop+start as one DAG) and the SetWanted-as-a-node change are
follow-ups off #2439.
- deploy-window gate (meta::exclusive) + path-limited meta commits:
a perm/lock/topology commit can no longer sweep an ApprovalDeploy's
staged flake.lock and neuter abort_deploy (regression test included)
- cancel surfaces now buffer terminal roll-ups the scheduler drains,
so a queued approval DAG cancelled by the operator resolves its
approval instead of dangling, and cancelled power ops revert their
wanted flip to the observed state
- hivectl restart / restart-all ride the queue (lease serialization,
transient guard) and restart sets wanted=Up like the old kill+start
- exactly one Rebuilt event per rebuild DAG, emitted at terminal
- StopForUpdate pre-seeds a missing agent_power row from the pre-stop
observation so a rebuild can't strand an unknown agent offline
- history trim keeps terminal fan-out parents with live children
- audit_log back on db::open; swarm.js badge for reconcile DAGs
jobs are now DAGs of primitive nodes (prebuild, stop-for-update, swap,
reconcile, signal, drain, ...) driven by one scheduler with N build
slots + per-agent lifecycle leases. per-agent power intent (wanted
up/offline) is durable in agent_power.sqlite; Reconcile nodes converge
observed state to it. kills the graceful-stop watcher thread, the
deferred-start follow-up, and the cascade pre-enqueue (fan-out on
MetaLock completion instead). tracker: #2166
