Content history and repetition control

Check a proposed topic, hook, or series episode against a real estate agent's CONTENT_HISTORY.md and private content event log before anything is drafted, report every overlap with its date and channel, suggest a fresh angle when the topic ran in the last 30 days, and record completed events as history entries in the state the evidence supports. Use when an agent says "have I covered this", "did I already post about", "is this a repeat", "check my history", "log that this went out", "record this post", "update my content history", or "what did I publish in August". Requires CONTENT_HISTORY.md or logs/CONTENT_EVENT_LOG.md in the private workspace plus the proposed topic or…