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#163: run_turn_loop no longer injects f'{prompt} [turn N]' into follow-up prompts. The suffix was never defined or interpreted anywhere — not by the engine, not by the system prompt, not by any LLM. It looked like a real user-typed annotation in the transcript and made replay/analysis fragile. New behaviour: - turn 0 submits the original prompt (unchanged) - turn > 0 submits caller-supplied continuation_prompt if provided, else the loop stops cleanly — no fabricated user turn - added continuation_prompt: str | None = None parameter to run_turn_loop - added --continuation-prompt CLI flag for claws scripting multi-turn loops - zero '[turn' strings ever appear in mutable_messages or stdout now Behaviour change for existing callers: - Before: run_turn_loop(prompt, max_turns=3) submitted 3 turns ('prompt', 'prompt [turn 2]', 'prompt [turn 3]') - After: run_turn_loop(prompt, max_turns=3) submits 1 turn ('prompt') - To preserve old multi-turn behaviour, pass continuation_prompt='Continue.' or any structured follow-up text One existing timeout test (test_budget_is_cumulative_across_turns) updated to pass continuation_prompt so the cumulative-budget contract is actually exercised across turns instead of trivially satisfied by a one-turn loop. #164 filed: addresses reviewer feedback on #161. The wall-clock timeout bounds the caller-facing wait, but the underlying submit_message worker thread keeps running and can mutate engine state after the timeout TurnResult is returned. A cooperative cancel_event pattern is sketched in the pinpoint; real asyncio.Task.cancel() support will come once provider IO is async-native (larger refactor). Tests (tests/test_run_turn_loop_continuation.py, 8 tests): - TestNoTurnSuffixInjection (2): zero '[turn' strings in any submitted prompt, both default and explicit-continuation paths - TestContinuationDefaultStopsAfterTurnZero (2): default loops run exactly one turn; engine.submit_message called exactly once despite max_turns=10 - TestExplicitContinuationBehaviour (2): turn 0 = original, turn N = continuation verbatim; max_turns still respected - TestCLIContinuationFlag (2): CLI default emits only '## Turn 1'; --continuation-prompt wires through to multi-turn behaviour Full suite: 67/67 passing. Closes ROADMAP #163. Files #164.