core/agent: remove turn-start todo nag -- nag only fires after complete turn

src/plyngent/agent/chat.py

@@ -25,7 +25,6 @@ from .events import UsageEvent
 from .loop import DEFAULT_MAX_ROUNDS, run_chat_loop
 from .todo_nag import (
     DEFAULT_TODO_NAG_STRATEGY,
-    inject_todo_nag_for_stack_with_events,
     is_synthetic_todo_nag_call_id,
     parse_todo_nag_strategy,
     refresh_synthetic_todo_nags,
@@ -431,33 +430,6 @@ class ChatAgent:
         last_request = TokenUsage()
         try:
             _turn_nag_strategy: TodoNagStrategy = self.todo_nag_strategy
-            # Turn-start nag before first completion; yield events so CLI flushes
-            # (synthetic_tool → ToolCall/Result chrome, not glued to text).
-            # On retry, a synthetic_tool pair from a previous failed attempt may
-            # have survived rollback (it looks like a committed tool batch).
-            # Skip fresh injection — refresh_synthetic_todo_nags already updated
-            # the content of the surviving pair above.
-            _turn_nag_skipped = (
-                self.todo_stack is not None
-                and not self.todo_stack.is_empty()
-                and _turn_nag_strategy == "synthetic_tool"
-                and _synthetic_todo_pair_after(self.messages, user_index)
-            )
-            if (
-                self.todo_stack is not None
-                and not self.todo_stack.is_empty()
-                and (
-                    _turn_nag_strategy != "synthetic_tool" or not _synthetic_todo_pair_after(self.messages, user_index)
-                )
-            ):
-                _injected, nag_events = inject_todo_nag_for_stack_with_events(
-                    self.messages,
-                    self.todo_stack,
-                    kind="turn_start",
-                    strategy=_turn_nag_strategy,
-                )
-                for nag_event in nag_events:
-                    yield nag_event
 
             async for event in run_chat_loop(
                 self.client,
@@ -473,7 +445,6 @@ class ChatAgent:
                 max_context_tokens=self.max_context_tokens,
                 todo_stack=self.todo_stack,
                 todo_nag_strategy=_turn_nag_strategy,
-                turn_start_nag_skipped=_turn_nag_skipped,
                 directive_reminder_tokens=self.directive_reminder_tokens,
                 directive_reminder_text=self.directive_reminder_text,
                 reminder_last_band=self.reminder_last_band,

src/plyngent/agent/loop.py

@@ -386,7 +386,6 @@ async def run_chat_loop(  # noqa: C901, PLR0912 — multi-phase tool loop
     max_context_tokens: int = DEFAULT_CONTEXT_MAX_TOKENS,
     todo_stack: TodoStack | None = None,
     todo_nag_strategy: TodoNagStrategy = DEFAULT_TODO_NAG_STRATEGY,
-    turn_start_nag_skipped: bool = False,
     directive_reminder_tokens: int = DEFAULT_DIRECTIVE_REMINDER_TOKENS,
     directive_reminder_text: str | None = None,
     reminder_last_band: int = 0,
@@ -480,19 +479,12 @@ async def run_chat_loop(  # noqa: C901, PLR0912 — multi-phase tool loop
             if not has_tools:
                 if todo_stack is not None and todo_stack.needs_review() and not todo_review_injected:
                     todo_review_injected = True
-                    # On retry, the turn-start nag was skipped (pair survived
-                    # rollback).  The model already has the stack reminder
-                    # in-history — skip the end-of-turn duplicate.
-                    if turn_start_nag_skipped:
-                        injected = False
-                        nag_events: list[AgentEvent] = []
-                    else:
-                        injected, nag_events = inject_todo_nag_for_stack_with_events(
-                            messages,
-                            todo_stack,
-                            kind="end_of_turn",
-                            strategy=todo_nag_strategy,
-                        )
+                    injected, nag_events = inject_todo_nag_for_stack_with_events(
+                        messages,
+                        todo_stack,
+                        kind="end_of_turn",
+                        strategy=todo_nag_strategy,
+                    )
                     for nag_event in nag_events:
                         yield nag_event
                     if injected: