core/cli: interactive continue prompts for loop and PTY limits

on_limit raises tool-round allowance; PTY session/budget limits can
prompt to raise; MaxRoundsEvent.continued marks extended runs.

tests/test_cli/test_limits.py

@@ -0,0 +1,32 @@
+from __future__ import annotations
+
+from typing import TYPE_CHECKING
+
+from plyngent.cli.limits import install_cli_limit_hooks, prompt_continue_limit
+from plyngent.tools.process.pty_session import PtyManager
+
+if TYPE_CHECKING:
+    import pytest
+
+
+def test_prompt_continue_limit_yes(monkeypatch: pytest.MonkeyPatch) -> None:
+    def _confirm(*_a: object, **_k: object) -> bool:
+        return True
+
+    monkeypatch.setattr("click.confirm", _confirm)
+    assert prompt_continue_limit("hit a wall") is True
+
+
+def test_prompt_continue_limit_no(monkeypatch: pytest.MonkeyPatch) -> None:
+    def _confirm(*_a: object, **_k: object) -> bool:
+        return False
+
+    monkeypatch.setattr("click.confirm", _confirm)
+    assert prompt_continue_limit("hit a wall") is False
+
+
+def test_install_cli_limit_hooks() -> None:
+    install_cli_limit_hooks()
+    # Hook is installed process-wide for the CLI session.
+    assert callable(getattr(PtyManager, "_limit_continue", None))
+    PtyManager.set_limit_continue_hook(None)