import (
"context"
"errors"
+ "fmt"
"path/filepath"
"sync"
"time"
)
-// newTurnLoop returns the loop of agent with its memory. Its calls go through
-// client, and notify gets each event. The clock gives the date of a turn.
-func newTurnLoop(agent *Agent, memory *Memory, client ChainClient, clock func() time.Time, notify func(Event)) (*TurnLoop, error) {
+// newTurnLoop returns the loop of agent with its memory and its subagents. Its
+// calls go through client, and notify gets each event. The clock gives the date
+// of a turn.
+func newTurnLoop(agent *Agent, memory *Memory, subagents *Subagents, client ChainClient, clock func() time.Time, notify func(Event)) (*TurnLoop, error) {
layout, err := loadViewLayout(filepath.Join(agent.dir, viewLayoutFileName))
if err != nil {
return nil, err
wake: make(chan struct{}, 1),
}
+ l.runs = &SubagentRuns{
+ agent: agent,
+ memory: memory,
+ subagents: subagents,
+ layout: layout,
+ client: client,
+ state: l.state,
+ report: l.Report,
+ note: l.note,
+ fail: l.fail,
+ notify: notify,
+ running: make(map[string]*SubagentRun),
+ }
+
l.tools = &Toolbox{
- log: l,
- chat: memory,
- workdir: agent.config.Workdir,
+ log: l,
+ chat: memory,
+ subagents: subagents,
+ runs: l.runs,
+ workdir: agent.config.Workdir,
}
return l, nil
}
// Event tells the clients what the agent does as it happens. Kind is the kind
-// of a logged message (user, reply, tool, echo), or one of ready, busy, idle,
-// and error. ID is the ID of a logged message. Source names the client that
-// sent a user message, such as terminal or telegram, so that each client can
-// show the messages of the others.
+// of a logged message (user, reply, tool, echo, note, work), or one of ready,
+// busy, idle, error, and subagent, which tells that the subagent Text starts a
+// run. ID is the ID of a logged message. Source names the client that sent a
+// user message, such as terminal or telegram, so that each client can show the
+// messages of the others, or the subagent of a report. Status tells how the run
+// of a report ended: finished, stopped, or failed.
type Event struct {
Kind string `json:"kind"`
ID int `json:"id,omitempty"`
Text string `json:"text,omitempty"`
Source string `json:"source,omitempty"`
+ Status string `json:"status,omitempty"`
}
// TurnLoop runs the turns of one agent. A user message goes to the log when it
// The view goes out as the messages of a ViewLayout, so the first request of a
// turn reads the view of the turn before from the prompt cache. User messages
// that come during a turn join the next request of its chain after the tool
-// results.
+// results, and so do the reports of the subagents. The subagents run until the
+// loop ends.
type TurnLoop struct {
agent *Agent
memory *Memory
client ChainClient
tools *Toolbox
+ runs *SubagentRuns
layout *ViewLayout
clock func() time.Time
notify func(Event)
mutex sync.Mutex
pending []Message
cancel context.CancelFunc
+ failure error
}
// Submit logs a user message from the client source and wakes the loop. The
return message, nil
}
+// Report logs the report text of the subagent name as a work message and tells
+// the clients, with the status of the run. Unless the subagent was stopped, the
+// report joins the waiting messages and wakes the loop, as a user message of
+// Submit does. A failed write stops the loop, because the log refuses all
+// writes after it.
+func (l *TurnLoop) Report(name, text, status string) {
+ message, err := l.Work(name, text, status)
+ switch {
+ case err != nil:
+ l.fail(fmt.Errorf("%w: %w", errChainLogWrite, err))
+ case status != subagentStopped:
+ l.Wake(message)
+ }
+}
+
+// Work logs text as a work message of source, such as the name of a subagent,
+// and tells the clients, with status. The message starts no turn until it goes
+// to Wake.
+func (l *TurnLoop) Work(source, text, status string) (Message, error) {
+ message, err := l.memory.Append("work", text)
+ if err != nil {
+ return Message{}, err
+ }
+
+ l.notify(Event{
+ Kind: "work",
+ ID: message.ID,
+ Text: text,
+ Source: source,
+ Status: status,
+ })
+
+ return message, nil
+}
+
+// Wake adds the logged messages to the waiting messages and wakes the loop
+// once, as a user message of Submit does. They join the first request of a new
+// turn together, or the next request of a running turn after the tool results.
+func (l *TurnLoop) Wake(messages ...Message) {
+ if len(messages) == 0 {
+ return
+ }
+
+ l.mutex.Lock()
+ l.pending = append(l.pending, messages...)
+ l.mutex.Unlock()
+
+ select {
+ case l.wake <- struct{}{}:
+ default:
+ }
+}
+
+// StopSubagent ends the run of the subagent name and tells if it ran. Its
+// report is logged, but it starts no turn.
+func (l *TurnLoop) StopSubagent(name string) (bool, error) {
+ return l.runs.Stop(name)
+}
+
// Interrupt ends the running turn. A running tool is killed, and the turn sends
// no further request.
func (l *TurnLoop) Interrupt() bool {
return l.memory.Flush(ctx)
}
-// Run runs a turn each time user messages wait, until ctx ends. It returns the
-// error of a failed log write, which stops the agent.
+// Run runs a turn each time user messages or reports wait, until ctx ends. It
+// returns the error of a failed log write, which stops the agent. At its start
+// it resumes the subagents that a stop of the daemon cut, and at its end it
+// ends the runs of the subagents and waits for them.
func (l *TurnLoop) Run(ctx context.Context) error {
+ defer l.runs.Close()
+
+ err := l.runs.Resume(ctx)
+ if err != nil {
+ return fmt.Errorf("resume subagents: %w", err)
+ }
+
for {
for l.waiting() {
err := l.turn(ctx)
case <-ctx.Done():
return ctx.Err()
}
+
+ err := l.failed()
+ if err != nil {
+ return err
+ }
}
}
+// note logs a note and tells the clients. A note starts no turn.
+func (l *TurnLoop) note(text string) error {
+ _, err := l.record("note", "", text)
+
+ return err
+}
+
// record logs a message and tells the clients, with the client source of a user
// message.
func (l *TurnLoop) record(kind, source, text string) (Message, error) {
return message, nil
}
-// waiting tells if user messages wait for a request.
+// waiting tells if user messages or reports wait for a request.
func (l *TurnLoop) waiting() bool {
l.mutex.Lock()
defer l.mutex.Unlock()
return len(l.pending) > 0
}
+// fail stops the loop with err.
+func (l *TurnLoop) fail(err error) {
+ l.mutex.Lock()
+ l.failure = errors.Join(l.failure, err)
+ l.mutex.Unlock()
+
+ select {
+ case l.wake <- struct{}{}:
+ default:
+ }
+}
+
+// failed returns the error of a failed write of a report.
+func (l *TurnLoop) failed() error {
+ l.mutex.Lock()
+ defer l.mutex.Unlock()
+
+ return l.failure
+}
+
// turn runs one turn. A failed or interrupted model call ends the turn and
// tells the clients. The messages of the turn stay in the log and the view, and
// the next turn starts only with a new message, so a lasting failure such as a
projects / onechat / blobdiff