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hive-agent: re-send the turn-state header once a minute

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The header on `$SWARM.agent-state.<agent>` went out only when a bus event
changed it, and the core subject keeps nothing for a late subscriber. An
idle agent therefore said nothing to a reader that attached after its
last change: swarm-controller after a restart showed `effective: null`
for that agent until its next turn, which can be hours.

The publish loop now also wakes every 60 s and re-sends the current
header through the same `publish` path (clearing the dedup state first).
Transitions still go out as they happen. Same subject, same grant.

An agent whose queue connection is down now logs `swarm agent state:
publish skipped` once a minute even while idle, so the
`hh-swarm-agent-state-publish-skipped` alert also fires for idle
disconnected agents, not only busy ones.

Refs #5034
This commit is contained in:
atlas 2026-10-10 00:25:13 +02:00 • committed by mara
commit 19a045a401
8 changed files with 152 additions and 59 deletions
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15
frontend/packages/swarm-ui/src/pages/agents/useSwarmAgentStateStream.ts
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@ -7,13 +7,14 @@
// coalesce: each event is just the latest value.
//
// **No seed on attach.** `agent_state_stream.rs`'s own module doc names
// this limitation: the subject is published on transition only, so an
// agent that has sat idle since before this hook mounted announces
// nothing until its next change. `header` stays `null` until the first
// event lands — callers should render no badges in that gap rather than
// a stale or guessed one (there is no swarm-level endpoint today that
// can seed turn_state/model/ctx/cost synchronously — `GET
// /api/agents/status`'s snapshot carries only `status_text`/`running`).
// this limitation: the subject is published on transition and re-sent
// once a minute, so an agent that has sat idle since before this hook
// mounted announces nothing for up to a minute. `header` stays `null`
// until the first event lands — callers should render no badges in that
// gap rather than a stale or guessed one (there is no swarm-level
// endpoint today that can seed turn_state/model/ctx/cost synchronously —
// `GET /api/agents/status`'s snapshot carries only
// `status_text`/`running`).
import { useEffect, useState } from "preact/hooks";
export type ConnectionState = "connecting" | "open" | "reconnecting" | "closed";