aether_cli/acp/
mod.rs

1pub(crate) mod config_setting;
2pub(crate) mod handlers;
3pub(crate) mod mappers;
4pub(crate) mod model_config;
5pub(crate) mod relay;
6pub(crate) mod session;
7pub(crate) mod session_manager;
8pub(crate) mod session_registry;
9pub(crate) mod session_store;
10pub mod testing;
11
12pub use mappers::map_mcp_prompt_to_available_command;
13pub use session_manager::SessionManager;
14
15use crate::settings_args::SettingsSourceArgs;
16use agent_client_protocol::{self as acp, ByteStreams};
17use llm::ReasoningEffort;
18use std::sync::Arc;
19use std::{fs::create_dir_all, path::PathBuf};
20use tokio::io::{stdin, stdout};
21use tokio_util::compat::{TokioAsyncReadCompatExt, TokioAsyncWriteCompatExt};
22use tracing::info;
23use tracing_appender::rolling::daily;
24use tracing_subscriber::EnvFilter;
25
26use llm::oauth::OAuthCredentialStore;
27use session_manager::{InitialSessionSelection, SessionManagerConfig};
28use session_registry::SessionRegistry;
29use session_store::SessionStore;
30
31#[derive(clap::Args, Debug)]
32pub struct AcpArgs {
33    /// Path to log file directory (default: /tmp/aether-acp-logs)
34    #[clap(long, default_value = "/tmp/aether-acp-logs")]
35    pub log_dir: PathBuf,
36
37    /// Initial agent (mode) to select for new sessions. Mutually exclusive with `--model` and `--reasoning-effort`.
38    #[clap(long, conflicts_with_all = ["model", "reasoning_effort"])]
39    pub agent: Option<String>,
40
41    /// Initial model id (e.g. `anthropic:claude-sonnet-4-5`) for new sessions.
42    /// Mutually exclusive with `--agent`.
43    #[clap(long, conflicts_with = "agent")]
44    pub model: Option<String>,
45
46    /// Initial reasoning effort for an explicit model session. Requires `--model` and is mutually exclusive with `--agent`.
47    #[clap(long, value_name = "low|medium|high|xhigh", requires = "model", conflicts_with = "agent")]
48    pub reasoning_effort: Option<ReasoningEffort>,
49
50    #[command(flatten)]
51    pub settings_source: SettingsSourceArgs,
52}
53
54/// Outcome of running the ACP server successfully.
55#[derive(Debug)]
56pub enum AcpRunOutcome {
57    /// The client disconnected cleanly (e.g. EOF on stdin).
58    CleanDisconnect,
59}
60
61/// Errors that terminate the ACP server run.
62#[derive(Debug)]
63pub enum AcpRunError {
64    Protocol(acp::Error),
65}
66
67impl std::fmt::Display for AcpRunError {
68    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
69        match self {
70            AcpRunError::Protocol(e) => write!(f, "ACP protocol error: {e}"),
71        }
72    }
73}
74
75impl std::error::Error for AcpRunError {
76    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
77        match self {
78            AcpRunError::Protocol(e) => Some(e),
79        }
80    }
81}
82
83pub async fn run_acp(args: AcpArgs) -> Result<AcpRunOutcome, AcpRunError> {
84    info!("Starting Aether ACP server");
85
86    setup_logging(&args);
87
88    let initial_selection = if let Some(agent) = args.agent.clone() {
89        InitialSessionSelection::agent(agent)
90    } else if let Some(model) = args.model.clone() {
91        InitialSessionSelection::model(model, args.reasoning_effort)
92    } else {
93        InitialSessionSelection::default()
94    };
95    let session_store =
96        SessionStore::new().map_or_else(|e| panic!("Failed to initialize session store: {e}"), Arc::new);
97    let manager = Arc::new(SessionManager::new(SessionManagerConfig {
98        registry: Arc::new(SessionRegistry::new()),
99        session_store,
100        has_oauth_credential: OAuthCredentialStore::has_credential,
101        initial_selection,
102        settings_source: args.settings_source.source(),
103    }));
104
105    let transport = ByteStreams::new(stdout().compat_write(), stdin().compat());
106    let connect_result = handlers::acp_agent_builder(manager.clone()).connect_to(transport).await;
107
108    manager.shutdown_all_sessions().await;
109
110    match connect_result {
111        Ok(()) => Ok(AcpRunOutcome::CleanDisconnect),
112        Err(err) => Err(AcpRunError::Protocol(err)),
113    }
114}
115
116fn setup_logging(args: &AcpArgs) {
117    create_dir_all(&args.log_dir).ok();
118    tracing_subscriber::fmt()
119        .with_writer(daily(&args.log_dir, "aether-acp.log"))
120        .with_ansi(false) // No ANSI colors in log files
121        .with_env_filter(EnvFilter::try_from_default_env().unwrap_or_else(|_| EnvFilter::new("warn")))
122        .pretty()
123        .init();
124}
125
126#[cfg(test)]
127mod tests {
128    use super::*;
129    use clap::Parser;
130
131    #[derive(Debug, Parser)]
132    struct TestCli {
133        #[command(flatten)]
134        args: AcpArgs,
135    }
136
137    #[test]
138    fn agent_conflicts_with_model() {
139        let err = TestCli::try_parse_from(["test", "--agent", "planner", "--model", "anthropic:claude-sonnet-4-5"])
140            .expect_err("agent and model should conflict");
141        assert_eq!(err.kind(), clap::error::ErrorKind::ArgumentConflict);
142    }
143
144    #[test]
145    fn agent_conflicts_with_reasoning_effort() {
146        let err = TestCli::try_parse_from(["test", "--agent", "planner", "--reasoning-effort", "high"])
147            .expect_err("agent and reasoning effort should conflict");
148        assert_eq!(err.kind(), clap::error::ErrorKind::ArgumentConflict);
149    }
150
151    #[test]
152    fn reasoning_effort_requires_model() {
153        let err = TestCli::try_parse_from(["test", "--reasoning-effort", "high"])
154            .expect_err("reasoning effort should require model");
155        assert_eq!(err.kind(), clap::error::ErrorKind::MissingRequiredArgument);
156    }
157
158    #[test]
159    fn reasoning_effort_with_model_is_allowed() {
160        let cli =
161            TestCli::try_parse_from(["test", "--model", "anthropic:claude-sonnet-4-5", "--reasoning-effort", "high"])
162                .expect("reasoning effort can configure an explicit model session");
163        assert_eq!(cli.args.reasoning_effort, Some(ReasoningEffort::High));
164    }
165}
aether_cli/acp/mod.rs

aether_cli/acp/
mod.rs
