scv_server/config/
runtime.rs

1//! Turning configuration into what the runtime, tools, and provider take.
2
3use std::{collections::HashMap, ffi::OsString, time::Duration};
4
5use anyhow::{Context, Result};
6use scv_client::Layout;
7use scv_core::{AgentConfig as CoreAgentConfig, HistoryLimits};
8use scv_provider_openai::ProviderLimits;
9use scv_tools::{
10    AgentAdapterConfig, AgentAuthPlan, BusyConfig, ToolsConfig,
11    conversation::ConversationLimits,
12    web::{SearchBackend, WebToolsConfig},
13};
14
15use super::{AgentPermissions, AgentTransport, Config, WebSearchMode, load::ensure_private_dir};
16
17impl Config {
18    pub(crate) fn core_agent(&self, system_prompt: String) -> CoreAgentConfig {
19        CoreAgentConfig {
20            system_prompt,
21            max_steps: self.agent.max_steps,
22            history_limits: HistoryLimits {
23                max_bytes: self.session.max_history_bytes,
24                max_messages: self.session.max_messages,
25                note_max_chars: self.context.summary_max_chars,
26            },
27        }
28    }
29
30    pub(crate) fn tools(&self) -> ToolsConfig {
31        ToolsConfig {
32            allow_no_timeout: self.tools.allow_no_timeout,
33            command_timeout: Duration::from_secs(self.tools.command_timeout_seconds),
34            agent_timeout: Duration::from_secs(self.tools.agent_timeout_seconds),
35            max_timeout: Duration::from_secs(self.tools.max_timeout_seconds),
36            output_limit_bytes: self.tools.output_limit_bytes,
37            max_read_bytes: self.tools.max_read_bytes,
38            max_write_bytes: self.tools.max_write_bytes,
39            max_delegation_depth: self.agent.max_delegation_depth,
40            prefer: self.agent.prefer.clone(),
41            conversations: ConversationLimits {
42                max: self.agent.max_conversations,
43                idle: Duration::from_secs(self.agent.conversation_idle_seconds),
44            },
45            delegation: None,
46            max_background: self.agent.max_background,
47            background: None,
48            reviews: None,
49            chat_attach: None,
50            chat_history: None,
51            precheck_agent_models: true,
52            worktrees: None,
53            workbench: None,
54            label: String::new(),
55            jobs: None,
56            workspace: std::path::PathBuf::new(),
57        }
58    }
59
60    /// How long a chat may be quiet before its next message starts a new
61    /// episode of its log.
62    pub(crate) fn episode_gap(&self) -> Duration {
63        Duration::from_secs(self.history.episode_gap_minutes.saturating_mul(60))
64    }
65
66    /// Where files the owner keeps from chat go: `history.archive_dir`, or
67    /// the history directory.
68    pub(crate) fn archive_dir(&self) -> std::path::PathBuf {
69        self.history
70            .archive_dir
71            .clone()
72            .unwrap_or_else(|| self.layout().history())
73    }
74
75    /// Web tool settings for a tool-enabled session, or `None` when disabled.
76    /// A Brave backend without a key is left out rather than failing the session.
77    pub(crate) fn web_tools(&self) -> Option<WebToolsConfig> {
78        if !self.web.enabled {
79            return None;
80        }
81        let search = match self.web.search {
82            WebSearchMode::Off | WebSearchMode::Provider => None,
83            WebSearchMode::Searxng => self
84                .web
85                .searxng_url
86                .clone()
87                .map(|url| SearchBackend::Searxng { url }),
88            WebSearchMode::Brave => {
89                let api_key = self
90                    .web
91                    .brave_api_key
92                    .clone()
93                    .or_else(|| {
94                        self.web
95                            .brave_api_key_env
96                            .as_deref()
97                            .and_then(|name| std::env::var(name).ok())
98                            .map(scv_client::Secret::from)
99                    })
100                    .filter(|key| !key.trim().is_empty());
101                if api_key.is_none() {
102                    tracing::warn!(
103                        "web.search is \"brave\" but no Brave API key is configured; web_search is unavailable"
104                    );
105                }
106                api_key.map(|api_key| SearchBackend::Brave {
107                    url: self.web.brave_url.clone(),
108                    api_key: api_key.into_inner(),
109                })
110            }
111        };
112        Some(WebToolsConfig {
113            fetch_max_bytes: self.web.fetch_max_bytes,
114            fetch_timeout: Duration::from_secs(self.web.fetch_timeout_seconds),
115            max_redirects: self.web.max_redirects,
116            auto_approve_domains: self.web.auto_approve_domains.clone(),
117            allow_private_addresses: self.web.allow_private_addresses,
118            search,
119            max_search_results: self.web.max_search_results,
120            output_limit: self.tools.output_limit_bytes,
121        })
122    }
123
124    /// Whether to offer the provider's hosted web search to tool-enabled sessions.
125    pub fn hosted_web_search(&self) -> bool {
126        self.web.enabled && self.web.search == WebSearchMode::Provider
127    }
128
129    pub(crate) fn provider_limits(&self) -> ProviderLimits {
130        ProviderLimits {
131            max_sse_event_bytes: self.provider_limits.max_sse_event_bytes,
132            max_response_bytes: self.provider_limits.max_response_bytes,
133            max_assistant_bytes: self.provider_limits.max_assistant_bytes,
134            max_tool_calls: self.provider_limits.max_tool_calls,
135            max_tool_arguments_bytes: self.provider_limits.max_tool_arguments_bytes,
136            max_retries: self.provider_limits.max_retries,
137            ..ProviderLimits::default()
138        }
139    }
140
141    pub fn adapters(&self) -> HashMap<String, AgentAdapterConfig> {
142        let user_home = dirs::home_dir();
143        self.agents
144            .0
145            .iter()
146            .filter_map(|(name, config)| {
147                let descriptor = scv_tools::adapters::adapter(name)?;
148                let adapter_home = self.layout().agent_home(name);
149                let mut environment = vec![
150                    (OsString::from("SCV_HOME"), adapter_home.clone().into()),
151                    (OsString::from("HOME"), adapter_home.clone().into()),
152                    (
153                        OsString::from("XDG_CONFIG_HOME"),
154                        adapter_home.join("config").into(),
155                    ),
156                    (
157                        OsString::from("XDG_DATA_HOME"),
158                        adapter_home.join("data").into(),
159                    ),
160                    (
161                        OsString::from("XDG_STATE_HOME"),
162                        adapter_home.join("state").into(),
163                    ),
164                ];
165                for (variable, relative) in descriptor.home_environment {
166                    let path = if relative.is_empty() {
167                        adapter_home.clone()
168                    } else {
169                        adapter_home.join(relative)
170                    };
171                    environment.push((OsString::from(variable), path.into()));
172                }
173                let full = config.permissions == AgentPermissions::Full;
174                environment.extend(
175                    descriptor
176                        .fixed_environment
177                        .iter()
178                        .chain(
179                            descriptor
180                                .full_permission_environment
181                                .iter()
182                                .filter(|_| full),
183                        )
184                        .map(|(variable, value)| (OsString::from(variable), OsString::from(value))),
185                );
186                Some((
187                    name.clone(),
188                    AgentAdapterConfig {
189                        command: config.command.clone(),
190                        args: config.args.clone(),
191                        prompt_args: config.prompt_args.clone(),
192                        full_permission_args: full.then(|| {
193                            descriptor
194                                .full_permission_args
195                                .iter()
196                                .map(|arg| (*arg).to_owned())
197                                .collect()
198                        }),
199                        model_args: config.model_args.clone(),
200                        effort_args: config.effort_args.clone(),
201                        model_hint: descriptor.model_hint.into(),
202                        environment,
203                        search_dirs: user_home
204                            .as_deref()
205                            .map(|home| scv_tools::adapters::adapter_search_dirs(descriptor, home))
206                            .unwrap_or_default(),
207                        output: descriptor.output,
208                        resume: descriptor.resume,
209                        home: Some(adapter_home),
210                        auth: match descriptor.auth {
211                            scv_tools::adapters::AgentAuth::None => AgentAuthPlan::None,
212                            mode => {
213                                let settings = match scv_tools::claude_auth::claude_settings(
214                                    mode,
215                                    &self.layout().agent_home(name),
216                                ) {
217                                    Ok(Some(settings)) => settings,
218                                    Ok(None) => return None,
219                                    Err(error) => {
220                                        tracing::error!(
221                                            agent = %name,
222                                            %error,
223                                            "cannot build pinned Claude Code settings"
224                                        );
225                                        return None;
226                                    }
227                                };
228                                AgentAuthPlan::Claude {
229                                    mode,
230                                    settings,
231                                    home: self.layout().agent_home(name),
232                                }
233                            }
234                        },
235                        transport: descriptor.transport,
236                        acp: config.acp_launch(descriptor).map(|launch| {
237                            scv_tools::AcpAgentLaunch {
238                                command: launch.command.to_owned(),
239                                args: scv_tools::adapters::acp_args(&launch, full),
240                                full_mode: launch.full_mode.filter(|_| full).map(str::to_owned),
241                                environment: launch
242                                    .full_environment
243                                    .iter()
244                                    .filter(|_| full)
245                                    .map(|(variable, value)| {
246                                        (OsString::from(variable), OsString::from(value))
247                                    })
248                                    .collect(),
249                                // An agent without a verified one-prompt
250                                // mode runs over ACP only.
251                                required: config.transport == AgentTransport::Acp
252                                    || !descriptor.cli_turns,
253                                session_options: launch.session_options,
254                            }
255                        }),
256                        use_for: config.use_for.clone(),
257                        defaults: config.defaults(),
258                        options_file: Some(self.layout().agent_options(name)),
259                        busy: BusyConfig {
260                            behavior: config.on_busy.unwrap_or(self.agent.on_busy),
261                            steer_fallback: config
262                                .steer_fallback
263                                .unwrap_or(self.agent.steer_fallback),
264                            max_queued_turns: config
265                                .max_queued_turns
266                                .unwrap_or(self.agent.max_queued_turns),
267                        },
268                    },
269                ))
270            })
271            .collect()
272    }
273
274    /// The paths under this instance's home. It does not know whether the
275    /// instance is the default one, so take the service unit name from the
276    /// `Layout` the process resolved instead.
277    pub fn layout(&self) -> Layout {
278        Layout::new(&self.instance_home)
279    }
280
281    pub fn prepare_adapter_homes(&self) -> Result<()> {
282        let layout = self.layout();
283        std::fs::create_dir_all(layout.agents()).context("create the agent homes directory")?;
284        ensure_private_dir(&layout.agents())?;
285        for name in self.agents.0.keys() {
286            let path = layout.agent_home(name);
287            std::fs::create_dir_all(&path)
288                .with_context(|| format!("create isolated {name} agent home"))?;
289            ensure_private_dir(&path)
290                .with_context(|| format!("secure isolated {name} agent home"))?;
291        }
292        Ok(())
293    }
294}
scv_server/config/runtime.rs

scv_server/config/
runtime.rs
