mj_controller/server/api/
subagent_backend.rs

1use super::*;
2
3/// Everything the API needs from the daemon: live session actors, the durable
4/// projection, and the target-side git operations.
5///
6/// The daemon's implementation lives in `server_runtime::api`; route tests
7/// supply a fake.
8pub trait SubagentBackend: Send + Sync {
9    /// Cheap token for this session's durable wait inputs. Backends without
10    /// a committed publication leave filtering to the detailed observation.
11    fn wait_revision(&self, _session_id: &str) -> AnyResult<Option<u64>> {
12        Ok(None)
13    }
14
15    fn transcript_history(
16        &self,
17        session_id: String,
18        before: Option<mj_core::storage::TranscriptCursor>,
19    ) -> BoxFuture<'_, AnyResult<mj_core::storage::TranscriptHistoryPage>> {
20        Box::pin(async move {
21            tokio::task::spawn_blocking(move || {
22                crate::database::load_transcript_history(&session_id, before.as_ref(), 128)?
23                    .context("session history is unavailable")
24            })
25            .await?
26        })
27    }
28
29    fn native_agent_history(
30        &self,
31        owner: String,
32        child: String,
33        before: Option<(u64, String)>,
34    ) -> BoxFuture<'_, AnyResult<mj_core::native_agent::NativeAgentHistoryPage>> {
35        Box::pin(async move {
36            tokio::task::spawn_blocking(move || {
37                crate::database::native_agent_history(&owner, &child, before)
38            })
39            .await?
40        })
41    }
42    fn events(
43        &self,
44        filter: crate::database::ApiEventFilter,
45        after_seq: Option<u64>,
46    ) -> BoxFuture<'_, AnyResult<crate::database::ApiEventPage>> {
47        events::load_events(filter, after_seq)
48    }
49
50    fn profile_config(
51        &self,
52        profile: String,
53        model: Option<String>,
54        refresh: bool,
55    ) -> BoxFuture<'_, AnyResult<mj_core::worker_launch::ProfileConfig>> {
56        Box::pin(crate::controller::profile_config::discover(
57            profile, model, refresh,
58        ))
59    }
60    /// The profiles a parent running on `parent_profile` may start a sub-agent
61    /// on, each with its discovered choices and remaining quota. It waits for
62    /// a discovery the daemon has not finished; a profile whose discovery
63    /// fails is reported as unavailable rather than failing the whole answer.
64    fn subagent_candidates(
65        &self,
66        _parent_profile: String,
67    ) -> BoxFuture<'_, AnyResult<SubagentCandidates>> {
68        Box::pin(async { anyhow::bail!("sub-agent profiles are unavailable") })
69    }
70    fn start_subagent(
71        &self,
72        _request: crate::controller::RegisterSubagentRequest,
73    ) -> BoxFuture<'_, AnyResult<mj_core::subagent::SubagentRecord>> {
74        Box::pin(async { anyhow::bail!("sub-agent creation is unavailable") })
75    }
76    fn list_subagents(
77        &self,
78        parent_session_id: String,
79    ) -> BoxFuture<'_, AnyResult<Vec<mj_core::subagent::SubagentRecord>>> {
80        Box::pin(async move {
81            tokio::task::spawn_blocking(move || crate::database::list_subagents(&parent_session_id))
82                .await?
83        })
84    }
85    /// Whether a sub-agent child has handed back its report for its parent's
86    /// newest task; see [`crate::controller::subagent_has_handed_back`].
87    fn subagent_handed_back(&self, child_session_id: String) -> BoxFuture<'_, AnyResult<bool>> {
88        Box::pin(async move {
89            tokio::task::spawn_blocking(move || {
90                crate::controller::subagent_has_handed_back(&child_session_id)
91            })
92            .await?
93        })
94    }
95    fn read_context_file(
96        &self,
97        session_id: String,
98        path: PathBuf,
99    ) -> BoxFuture<'_, std::result::Result<Vec<u8>, ExportError>> {
100        self.read_file(session_id, path)
101    }
102    /// The workspaces the store holds, in the order the terminal's tabs and the
103    /// viewer's list show them.
104    fn list_workspaces(
105        &self,
106    ) -> BoxFuture<'_, AnyResult<Vec<mj_core::workspace::WorkspaceRecord>>> {
107        Box::pin(async { tokio::task::spawn_blocking(crate::database::list_workspaces).await? })
108    }
109    /// The workspace with this name, creating it when the store holds none.
110    ///
111    /// This is the daemon's own `CreateWorkspace` operation: create-or-get, so
112    /// two callers that both saw an empty list attach to the same normalized
113    /// name instead of one of them meeting a SQLite conflict. The daemon
114    /// overrides it to republish the list afterwards.
115    fn create_workspace(
116        &self,
117        name: String,
118    ) -> BoxFuture<'_, AnyResult<mj_core::workspace::WorkspaceRecord>> {
119        Box::pin(async move {
120            tokio::task::spawn_blocking(move || crate::database::create_or_get_workspace(&name))
121                .await?
122        })
123    }
124    fn set_config(
125        &self,
126        session_id: String,
127        key: String,
128        value: String,
129    ) -> BoxFuture<'_, AnyResult<()>> {
130        Box::pin(async move {
131            self.session_handle(session_id)
132                .await?
133                .ok_or_else(|| anyhow::anyhow!("session has no live actor"))?
134                .set_config(key, value)
135                .await
136        })
137    }
138    fn cancel_start(&self, _session_id: String) -> BoxFuture<'_, AnyResult<()>> {
139        Box::pin(async { Ok(()) })
140    }
141    /// The live actor for a session, or `None` when none holds it.
142    fn session_handle(&self, session_id: String)
143    -> BoxFuture<'_, AnyResult<Option<SessionHandle>>>;
144
145    /// Submit a prompt, returning its relay acceptance ordinal.
146    fn prompt(&self, session_id: String, text: String) -> BoxFuture<'_, AnyResult<u64>>;
147
148    /// Durable turn state for a session with no live actor.
149    fn turn_state(&self, session_id: String) -> BoxFuture<'_, AnyResult<Option<TurnState>>>;
150
151    /// A sub-agent child's recorded report, and whether it has the handback
152    /// tool. `None` for a session that is not a Mjolnir sub-agent.
153    fn subagent_report(
154        &self,
155        _session_id: String,
156    ) -> BoxFuture<'_, AnyResult<Option<(bool, mj_core::subagent::SubagentReport)>>> {
157        Box::pin(async { Ok(None) })
158    }
159
160    /// Summarize the turn that covers these transcript positions.
161    fn turn_summary(
162        &self,
163        session_id: String,
164        turn: TurnSpan,
165    ) -> BoxFuture<'_, AnyResult<TurnSummary>>;
166
167    /// Apply model, effort, and the first prompt once a new session is ready.
168    fn start_followup(
169        &self,
170        session_id: String,
171        followup: StartFollowup,
172    ) -> BoxFuture<'_, AnyResult<()>>;
173
174    /// How far a created session's follow-up has got.
175    fn start_status(&self, session_id: String) -> BoxFuture<'_, AnyResult<Option<StartStatus>>>;
176
177    /// A page of transcript items after `after_seq`.
178    fn transcript(
179        &self,
180        session_id: String,
181        after_seq: u64,
182        limit: usize,
183        role: Option<mj_core::transcript::TranscriptRole>,
184    ) -> BoxFuture<'_, AnyResult<Option<TranscriptPage>>>;
185
186    fn usage(
187        &self,
188        session_id: String,
189        after_seq: u64,
190        limit: usize,
191    ) -> BoxFuture<'_, AnyResult<Option<crate::database::UsagePage>>> {
192        Box::pin(async move {
193            tokio::task::spawn_blocking(move || {
194                crate::database::load_session_usage(&session_id, after_seq, limit)
195            })
196            .await?
197        })
198    }
199
200    fn usage_tree(
201        &self,
202        parent: String,
203    ) -> BoxFuture<'_, AnyResult<Option<crate::database::UsageTree>>> {
204        Box::pin(async move {
205            tokio::task::spawn_blocking(move || crate::database::load_usage_tree(&parent)).await?
206        })
207    }
208
209    /// A unified diff of the session's work.
210    fn diff(
211        &self,
212        session_id: String,
213        options: DiffOptions,
214    ) -> BoxFuture<'_, Result<String, ExportError>>;
215
216    /// One file from the session's workspace.
217    fn read_file(
218        &self,
219        session_id: String,
220        path: PathBuf,
221    ) -> BoxFuture<'_, Result<Vec<u8>, ExportError>>;
222
223    fn write_file(
224        &self,
225        _session_id: String,
226        _path: PathBuf,
227        _bytes: Vec<u8>,
228        _overwrite: bool,
229    ) -> BoxFuture<'_, Result<(), ExportError>> {
230        Box::pin(async { Err(ExportError::Refused("file injection is unavailable".into())) })
231    }
232
233    /// Push the session's branch to its repository's default remote.
234    fn push_branch(
235        &self,
236        session_id: String,
237        branch: String,
238    ) -> BoxFuture<'_, Result<PushedBranch, ExportError>>;
239
240    /// A git bundle of the session's committed work.
241    fn bundle(&self, session_id: String) -> BoxFuture<'_, Result<BundleExport, ExportError>>;
242
243    /// Whether the index was synced recently enough that a query need not ask
244    /// for one.
245    fn wiki_sync_is_stale(&self) -> bool {
246        false
247    }
248
249    /// Ask for a background sync. It is never waited for: a query answers from
250    /// what the index holds now.
251    fn wiki_request_sync(&self) {}
252
253    fn wiki_search(
254        &self,
255        _query: String,
256        _limit: usize,
257    ) -> BoxFuture<'_, AnyResult<mj_client::daemon::WikiSearchPage>> {
258        Box::pin(async { anyhow::bail!("SessionWiki search is unavailable") })
259    }
260
261    /// `None` when the index holds no session with that id.
262    fn wiki_brief(
263        &self,
264        _wiki_id: String,
265        _max_chars: usize,
266    ) -> BoxFuture<'_, AnyResult<Option<String>>> {
267        Box::pin(async { anyhow::bail!("SessionWiki briefings are unavailable") })
268    }
269
270    /// The passages of one indexed session that match a query. `None` when the
271    /// index holds no session with that id.
272    fn wiki_hits(
273        &self,
274        _wiki_id: String,
275        _query: String,
276        _context_messages: usize,
277        _per_message_chars: usize,
278    ) -> BoxFuture<'_, AnyResult<Option<mj_client::daemon::WikiHitTranscript>>> {
279        Box::pin(async { anyhow::bail!("SessionWiki transcript hits are unavailable") })
280    }
281
282    /// What one indexed session is, and what continuing it would mean.
283    /// `None` when the index holds no session with that id.
284    fn wiki_session(
285        &self,
286        _wiki_id: String,
287    ) -> BoxFuture<'_, AnyResult<Option<mj_client::daemon::WikiSessionInfo>>> {
288        Box::pin(async { anyhow::bail!("SessionWiki lookups are unavailable") })
289    }
290
291    /// Start a session from an archived transcript, answering with its id, or
292    /// `None` when the index holds no session with that id.
293    fn wiki_restore(
294        &self,
295        _request: mj_client::daemon::WikiRestoreRequest,
296    ) -> BoxFuture<'_, AnyResult<Option<String>>> {
297        Box::pin(async { anyhow::bail!("SessionWiki restore is unavailable") })
298    }
299}
300
301pub(super) fn backend(state: &ServerState) -> Result<&Arc<dyn SubagentBackend>, ApiFailure> {
302    state
303        .subagent
304        .as_ref()
305        .ok_or_else(|| ApiFailure::unavailable("this server has no subagent backend installed"))
306}
307
308// ---------------------------------------------------------------------------
309// Wait resolution
310// ---------------------------------------------------------------------------
mj_controller/server/api/subagent_backend.rs

mj_controller/server/api/
subagent_backend.rs
