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harness-tui + engine: jobs pane, subtask drill-in, reminders (M4)

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TUI: Ctrl+J (or /jobs) opens a jobs pane listing the current session's board —
alias, agent, state, objective, files read — populated on load and kept live via
JobUpdated events; Enter drills into a subtask's child session. Snapshot test added.

Engine: optional orchestration reminders (off by default) injected as synthetic,
non-persisted turn-start blocks and, after a file tool runs, an after-file-tool
block on the following turn. Processor reports file-tool usage via StepOutcome.

This completes M4.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
This commit is contained in:
darman
2026-07-09 06:46:31 +02:00
co-authored by Claude Opus 4.8
parent 54f91b7e4c
commit 7738ed55b9
15 changed files with 426 additions and 28 deletions
Download Patch File Download Diff File Expand all files Collapse all files
crates/harness-core/src/engine/loop.rs
+96 -9
View File
@@ -24,6 +24,10 @@ pub struct RunConfig {
pub cost: Option<crate::types::ModelCost>,
/// Whether to append the background job board to requests (primary/delegating agents).
pub inject_job_board: bool,
/// Optional user-provided reminder injected at the start of every turn (off by default).
pub reminder_turn_start: Option<String>,
/// Optional user-provided reminder injected on the turn after a file tool ran.
pub reminder_after_file_tool: Option<String>,
}
/// Adds a step's usage/cost onto the persisted session and republishes it. Cost accounting is
@@ -162,6 +166,8 @@ pub async fn run_session(
) -> RunOutcome {
let mut doomloop = DoomLoopGuard::new();
let mut steps = 0u32;
// Whether the previous step ran a file tool, gating the `after_file_tool` reminder.
let mut prev_used_file_tool = false;
loop {
match should_continue(&ctx.store, &ctx.session_id).await {
@@ -200,18 +206,33 @@ pub async fn run_session(
wire_messages.extend(convert_message(message, &parts));
}
// Append the (synthetic, non-persisted) job board to the last user message so the
// orchestrator sees running/reusable subtasks. docs/04-multiagent.md.
// Collect synthetic (non-persisted) blocks to append to the last user message this
// turn: the optional turn-start reminder, the job board, and — if the previous step
// ran a file tool — the optional after-file-tool reminder. docs/04-multiagent.md.
let mut synthetic: Vec<String> = Vec::new();
if let Some(reminder) = &run_config.reminder_turn_start {
synthetic.push(reminder.clone());
}
if run_config.inject_job_board {
if let Some(board) = &ctx.job_board {
if let Some(block) = board.format_for_prompt() {
if let Some(last_user) = wire_messages
.iter_mut()
.rev()
.find(|m| m.role == WireRole::User)
{
last_user.content.push(WireContent::Text { text: block });
}
synthetic.push(block);
}
}
}
if prev_used_file_tool {
if let Some(reminder) = &run_config.reminder_after_file_tool {
synthetic.push(reminder.clone());
}
}
if !synthetic.is_empty() {
if let Some(last_user) = wire_messages
.iter_mut()
.rev()
.find(|m| m.role == WireRole::User)
{
for text in synthetic {
last_user.content.push(WireContent::Text { text });
}
}
}
@@ -278,6 +299,7 @@ pub async fn run_session(
}
Ok(outcome) => {
accumulate_session_usage(&ctx, &outcome.usage, outcome.cost, now_fn()).await;
prev_used_file_tool = outcome.used_file_tool;
// A completed step means the orchestrator has now seen any terminal jobs
// that were on the board this turn; mark them reconciled.
if run_config.inject_job_board {
@@ -494,6 +516,8 @@ mod tests {
..Default::default()
}),
inject_job_board: false,
reminder_turn_start: None,
reminder_after_file_tool: None,
};
let outcome = run_session(Arc::new(provider), ctx, &run_config, || 2).await;
@@ -602,6 +626,8 @@ mod tests {
instructions: Vec::new(),
cost: None,
inject_job_board: false,
reminder_turn_start: None,
reminder_after_file_tool: None,
};
let outcome = run_session(Arc::new(provider), ctx, &run_config, || 2).await;
@@ -707,6 +733,8 @@ mod tests {
instructions: Vec::new(),
cost: None,
inject_job_board: true,
reminder_turn_start: None,
reminder_after_file_tool: None,
};
let provider = std::sync::Arc::new(CapturingProvider {
@@ -735,4 +763,63 @@ mod tests {
assert!(text.contains("exp-1"), "got: {text}");
assert!(text.contains("map the auth flow"), "got: {text}");
}
#[tokio::test]
async fn turn_start_reminder_is_injected_into_the_request() {
let store = Store::open_in_memory().unwrap();
let bus = EventBus::new();
let model = ModelRef::new("mock", "mock-model");
let session = Session::new_root("orchestrator", model.clone(), 1);
let session_id = session.id.clone();
store.upsert_session(session).await.unwrap();
let user_message = Message::new_user(session_id.clone(), 1);
store.upsert_message(user_message.clone()).await.unwrap();
store
.upsert_part(Part {
id: crate::types::PartId::new(),
message_id: user_message.id.clone(),
session_id: session_id.clone(),
idx: 0,
body: PartBody::Text {
text: "do the thing".into(),
synthetic: false,
},
})
.await
.unwrap();
let cwd = tempfile::tempdir().unwrap();
let ctx = make_ctx(store, bus, session_id, cwd.path().to_path_buf()).await;
let run_config = RunConfig {
agent_name: "orchestrator".into(),
agent_prompt: "You orchestrate.".into(),
model,
temperature: None,
max_steps: 1,
instructions: Vec::new(),
cost: None,
inject_job_board: false,
reminder_turn_start: Some("REMEMBER: stay on task.".into()),
reminder_after_file_tool: None,
};
let provider = std::sync::Arc::new(CapturingProvider {
last: StdMutex::new(None),
});
let outcome = run_session(provider.clone(), ctx, &run_config, || 2).await;
assert!(matches!(outcome, RunOutcome::Stopped));
let req = provider.last.lock().unwrap().clone().expect("a request");
let last_user = req
.messages
.iter()
.rev()
.find(|m| m.role == WireRole::User)
.expect("a user message");
let has_reminder = last_user.content.iter().any(
|c| matches!(c, WireContent::Text { text } if text.contains("REMEMBER: stay on task.")),
);
assert!(has_reminder, "turn-start reminder should be injected");
}
}