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agents: remove the hive-level /model control; the swarm editor sets the model

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The per-agent web UI no longer sets the model: the `/model` slash
command, the model picker, `POST /api/model`, `Bus::set_model` and the
`hyperhive-model` writer are gone. The model chip is display-only and
shows where the model comes from (`model_source` in `/api/state`). The
model is set on the swarm (swarm UI agents page, `swarmctl agent
inference set`).

The read side is unchanged: with no swarm value an agent runs its
agent.nix model, else an existing `hyperhive-model` file, else haiku.
Existing files are not touched.

With the picker gone, its model list goes too: `available_models` in
`/api/state`, the ACP model-list filter, and the harness's global
`HIVE_AVAILABLE_MODELS`. The subagent daemon keeps its own
`HIVE_AVAILABLE_MODELS` from mcp.nix, and the `availableModels`
assertion stays.

`/effort` (command, picker, route, file) is unchanged.

Refs #5034
This commit is contained in:
atlas 2026-10-10 23:06:15 +02:00
commit 594693f4c7
26 changed files with 244 additions and 425 deletions
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12
nix/agent-modules/mcp.nix
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@ -415,13 +415,11 @@ in
HIVE_ACP_API_KEY_ENV = acpApiKeyEnv;
# Same `services.hyperhive.agent.availableModels` the harness's own assertions gate
# the primary session's model against, so a subagent can't be spawned
# on a model the operator didn't make available to this agent. The
# option renders into the *global* environment for the web UI's
# quick-picker, which a systemd unit doesn't inherit, so set it here
# from the option directly. `null` for an empty list, which systemd
# drops: the daemon reads an absent var as "no restriction" (this is
# a safety rail, not a security boundary), matching the harness
# assertion that an empty list waives too.
# on a model the operator didn't make available to this agent. `null`
# for an empty list, which systemd drops: the daemon reads an absent
# var as "no restriction" (this is a safety rail, not a security
# boundary), matching the harness assertion that an empty list waives
# too.
HIVE_AVAILABLE_MODELS =
if config.services.hyperhive.agent.availableModels == [ ] then
null