remove chatwait file from 9p filesystem

store/session.go

@@ -26,17 +26,13 @@ type Session struct {
 	cancel     context.CancelFunc
 	log        []byte
 	logVers    uint32
-	logMu      sync.Mutex
-	logCond    *sync.Cond
 	ChatOffset int
 	plan       []byte
 	prevPrompt []byte // last submitted prompt; overwritten on each new submission
 }
 
 func NewSession(id string, core agent.Core, ctx context.Context, cancel context.CancelFunc) *Session {
-	s := &Session{id: id, Core: core, Ctx: ctx, cancel: cancel}
-	s.logCond = sync.NewCond(&s.logMu)
-	return s
+	return &Session{id: id, Core: core, Ctx: ctx, cancel: cancel}
 }
 
 func (sess *Session) RunnableID() string { return sess.id }
@@ -58,11 +54,9 @@ func (sess *Session) AppendLog(data []byte) {
 	sess.log = append(sess.log, data...)
 	sess.logVers++
 	sess.mu.Unlock()
-	sess.logCond.Broadcast()
 }
 
 // EnsureTrailingNewline appends a newline if the log doesn't already end with one.
-// Always signals waiters to unblock chatwait at end of turn.
 func (sess *Session) EnsureTrailingNewline() {
 	sess.mu.Lock()
 	if len(sess.log) > 0 && sess.log[len(sess.log)-1] != '\n' {
@@ -70,47 +64,6 @@ func (sess *Session) EnsureTrailingNewline() {
 	}
 	sess.logVers++
 	sess.mu.Unlock()
-	sess.logCond.Broadcast()
-}
-
-// WaitLog blocks until the log grows past offset, then returns the new bytes.
-// Returns nil if ctx is cancelled or the log is signalled without growth
-// (e.g. end of turn).
-func (sess *Session) WaitLog(ctx context.Context, offset int) []byte {
-	stop := context.AfterFunc(ctx, func() {
-		sess.logCond.Broadcast()
-	})
-	defer stop()
-
-	sess.logMu.Lock()
-	defer sess.logMu.Unlock()
-
-	// Snapshot version before waiting.
-	sess.mu.RLock()
-	startVers := sess.logVers
-	sess.mu.RUnlock()
-
-	for ctx.Err() == nil {
-		sess.mu.RLock()
-		n := len(sess.log)
-		v := sess.logVers
-		var data []byte
-		if n > offset {
-			data = make([]byte, n-offset)
-			copy(data, sess.log[offset:])
-		}
-		sess.mu.RUnlock()
-		if data != nil {
-			return data
-		}
-		// If version changed but no new content (e.g. end-of-turn signal),
-		// return nil to unblock the caller.
-		if v != startVers {
-			return nil
-		}
-		sess.logCond.Wait()
-	}
-	return nil
 }
 
 // LogInfo returns the current log length and version atomically.

store/sessionfile.go

@@ -36,7 +36,6 @@ var SessionFileList = []struct {
 	{"env", 0444},
 	{"tail", 0555},
 	{"prompt.prev", 0444},
-	{"chatwait", 0444},
 	{"context", 0444},
 }
 
@@ -194,28 +193,6 @@ func (h *sessionHelper) fileSpec(name string, mode os.FileMode) FileSpec {
 			return []byte(v + "\n"), v, nil
 		}
 	}
-	if name == "chatwait" {
-		fs.Wait = func(connCtx context.Context, base string) ([]byte, string, error) {
-			ctx, cancel := context.WithCancel(connCtx)
-			defer cancel()
-			context.AfterFunc(h.sess.Ctx, cancel)
-			if h.sess.Core.State() == "idle" {
-				return nil, base, nil
-			}
-			offset := 0
-			if base == "" {
-				n, _ := h.sess.LogInfo()
-				offset = n
-			} else {
-				offset, _ = strconv.Atoi(base)
-			}
-			data := h.sess.WaitLog(ctx, offset)
-			if data == nil {
-				return nil, strconv.Itoa(offset), nil
-			}
-			return data, strconv.Itoa(offset + len(data)), nil
-		}
-	}
 
 	return fs
 }

store/store_test.go

@@ -448,60 +448,6 @@ func TestSessionAppendLog(t *testing.T) {
 	}
 }
 
-func TestSessionWaitLog(t *testing.T) {
-	sess := testSession("wl")
-	defer sess.Cancel()
-
-	sess.AppendLog([]byte("existing"))
-
-	// WaitLog should return new content appended after offset.
-	done := make(chan []byte, 1)
-	go func() {
-		data := sess.WaitLog(context.Background(), 8) // offset = len("existing")
-		done <- data
-	}()
-
-	// Give goroutine time to block.
-	time.Sleep(10 * time.Millisecond)
-	sess.AppendLog([]byte(" new"))
-
-	select {
-	case data := <-done:
-		if string(data) != " new" {
-			t.Errorf("WaitLog = %q; want %q", data, " new")
-		}
-	case <-time.After(time.Second):
-		t.Fatal("WaitLog did not unblock")
-	}
-}
-
-func TestSessionWaitLogEndOfTurn(t *testing.T) {
-	sess := testSession("wl2")
-	defer sess.Cancel()
-
-	sess.AppendLog([]byte("content\n"))
-
-	// WaitLog should unblock on EnsureTrailingNewline (end-of-turn signal)
-	// even when no new content is added.
-	done := make(chan []byte, 1)
-	go func() {
-		data := sess.WaitLog(context.Background(), 8) // offset = len("content\n")
-		done <- data
-	}()
-
-	time.Sleep(10 * time.Millisecond)
-	sess.EnsureTrailingNewline() // no new byte, but signals end of turn
-
-	select {
-	case data := <-done:
-		if data != nil {
-			t.Errorf("WaitLog = %q; want nil", data)
-		}
-	case <-time.After(time.Second):
-		t.Fatal("WaitLog did not unblock on end-of-turn")
-	}
-}
-
 func TestSessionStoreFileMode(t *testing.T) {
 	if m, ok := store.SessionStoreFileMode("new"); !ok || m != 0666 {
 		t.Errorf("SessionStoreFileMode(new) = %o, %v", m, ok)