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hive-runtime, hive-agent: model/effort picker for ACP agents from configOptions

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An ACP agent's model and effort pickers now list what its session offers
(its `model` and `thought_level` config options) instead of the claude
model list and EFFORT_LEVELS. A pick goes through the same Bus::set_model /
Bus::set_effort -> Config.model / Config.effort path as on claude; before
each prompt the ACP runtime sets it with `session/set_config_option`, model
first, and only when the session offers that value. Options are re-read
from the set response and from `config_option_update`, so the effort picker
disappears when the chosen model offers no effort levels, and is hidden
while a newly picked model waits for the next turn.

The session's options reach the web UI through a `Choices` handle from a
new `Runtime::choices`, registered on the bus the way `canceller` is.
/api/model and /api/effort accept only offered values on ACP. The claude
path is unchanged.

Refs #4391
This commit is contained in:
atlas 2026-09-30 07:59:27 +02:00
commit f189724a4c
13 changed files with 559 additions and 44 deletions
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17
hive-runtime/src/lib.rs
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@ -21,7 +21,10 @@ mod acp;
mod claude;
mod spec;
pub use acp::{AcpError, AcpRuntime, Canceller, PermissionAsk, PermissionPolicy};
pub use acp::{
AcpError, AcpRuntime, Canceller, Choice, Choices, PermissionAsk, PermissionPolicy,
SessionChoices,
};
pub use claude::ClaudeRuntime;
pub use hive_claude::{
CompactionPolicy, Config, PercentPolicy, Progress, SessionStore, Sink, Telemetry, TokenUsage,
@ -57,6 +60,11 @@ pub trait Runtime {
/// `None` for a runtime without one: a claude turn is stopped by
/// signalling its `claude` process.
fn canceller(&self) -> Option<Canceller>;
/// A handle reading the model and effort the session lets the client
/// pick. `None` for a runtime whose session offers none to read: claude's
/// `--model` and `--effort` are passed through unchecked.
fn choices(&self) -> Option<Choices>;
}
/// The runtime an agent was configured with, chosen at startup from a
@ -94,6 +102,13 @@ impl<P: CompactionPolicy> Runtime for AgentRuntime<P> {
Self::Acp(r) => r.canceller(),
}
}
fn choices(&self) -> Option<Choices> {
match self {
Self::Claude(r) => r.choices(),
Self::Acp(r) => r.choices(),
}
}
}
/// Why a runtime operation did not complete.