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swarm: per-agent inference settings (model, effort, subagent_models) in KV

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swarm-controller keeps each agent's inference settings in a new
`agent-inference` KV bucket, one key per agent, and is its only writer
(`GET`/`PUT`/`DELETE /api/agents/{name}/inference`; `swarmctl agent
inference get|set|clear`). Every field is optional. Each agent reads its
own key every 10 s through a direct-get grant on that key alone, and a
set `model` or `effort` replaces the Bus value, so the next turn runs on
it and the badge follows.

The swarm value is applied without persisting it: `Bus::set_model` and
`set_effort` are split into a persisting setter and a non-persisting
`apply_*`, and the poller uses the latter. Otherwise the swarm value
would overwrite `hyperhive-model`/`hyperhive-effort`, and clearing it, or
a restart, would no longer find the agent's own value. An unset field
changes nothing; a field cleared after being applied goes back to the
local value (`harness_state::local_model`/`local_effort`, the same
resolution `Bus::new` uses), read again at the clear.

`subagent_models` is validated, stored and shown by `get`; no agent
applies it yet.

Refs #5034
This commit is contained in:
atlas 2026-10-09 23:11:58 +02:00
commit 916fdb35b8
24 changed files with 1432 additions and 34 deletions
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3
hive-agent/src/main.rs
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@ -32,6 +32,7 @@ mod state_entry_watch;
mod stats;
mod swarm_agent_icon;
mod swarm_agent_state;
mod swarm_inference;
mod swarm_input;
mod swarm_queue;
mod swarm_term;
@ -532,6 +533,8 @@ async fn serve_main<S: Surface>(socket: &Path, poll_ms: u64) -> Result<()> {
swarm_agent_state::spawn(&bus);
// Once per start: a new icon only arrives with a new harness process.
swarm_agent_icon::spawn();
// The model and effort the swarm sets for this agent, over its local ones.
tokio::spawn(swarm_inference::run(bus.clone()));
// Set by the web UI's `/api/cancel` on a successful SIGINT, read-and-
// cleared by `handle_turn` before building the next wake prompt — see
// `hive_sh4re::inbox::INTERRUPTED_HINT`. Shared between the web server task and