vinzenz/hyperhive
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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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23
hive-agent/src/harness_state.rs
View file

@ -8,8 +8,9 @@ use std::path::PathBuf;
use swarm_queue_client::agent_inference::Source;
/// Path to the persisted model file. Overridable via `HYPERHIVE_MODEL_FILE`
/// for dev / tests; otherwise derived from the agent's harness dir.
/// Path to the `hyperhive-model` file. The harness only reads it, as the
/// fallback in [`local_model`]. Overridable via `HYPERHIVE_MODEL_FILE` for
/// dev / tests; otherwise derived from the agent's harness dir.
fn model_file_path() -> PathBuf {
std::env::var_os("HYPERHIVE_MODEL_FILE").map_or_else(
|| crate::paths::harness_dir().join("hyperhive-model"),
@ -27,14 +28,6 @@ pub(crate) fn load_model() -> Option<String> {
}
}
pub(crate) fn persist_model(name: &str) -> std::io::Result<()> {
let path = model_file_path();
if let Some(parent) = path.parent() {
let _ = std::fs::create_dir_all(parent);
}
std::fs::write(path, format!("{name}\n"))
}
/// Path to the persisted effort-level file. Sibling of `hyperhive-model`,
/// overridable via `HYPERHIVE_EFFORT_FILE` for dev / tests; otherwise
/// derived from the agent's harness dir.
@ -57,8 +50,8 @@ pub(crate) fn load_effort() -> Option<String> {
/// The model this agent runs when the swarm sets none, and where it comes
/// from. Priority: `configured` (`HIVE_DEFAULT_MODEL`, from
/// `services.hyperhive.agent.model` in agent.nix) > the persisted runtime
/// override > [`DEFAULT_MODEL`].
/// `services.hyperhive.agent.model` in agent.nix) > an existing
/// `hyperhive-model` file > [`DEFAULT_MODEL`].
pub(crate) fn local_model(configured: Option<&str>) -> (String, Source) {
model_from(configured, load_model())
}
@ -220,13 +213,13 @@ pub(crate) fn write_api_key_mode(enabled: bool) {
}
/// Compiled-in fallback model used when neither `HIVE_DEFAULT_MODEL` nor a
/// persisted runtime override is present.
/// `hyperhive-model` file is present.
pub const DEFAULT_MODEL: &str = "haiku";
/// Return the model declared in `HIVE_DEFAULT_MODEL` (set from
/// `services.hyperhive.agent.model` in `agent.nix`), or `None` if the env var is absent /
/// empty. When `Some`, this takes precedence over any persisted runtime
/// override so that nix config changes always take effect on rebuild.
/// empty. When `Some`, this takes precedence over a `hyperhive-model` file
/// so that nix config changes always take effect on rebuild.
#[must_use]
pub fn configured_model() -> Option<&'static str> {
// Leak once at startup — acceptable for a single config value.