OPEN-165: Improvement - check for duplicate command

[kcze]

Changes 🏗️

Raise in parse_and_process_response inside agent.py if agent tries to execute the same command twice in a row.

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[Pwuts]

This is clean, but too restrictive, as it disallows ever executing the same command twice within the same session. The only repetition that makes sense to directly disallow is executing the same command twice in succession.

Sensibly disallowing later re-execution would require more complex logic to determine whether the effect of a command has been compounded/altered since it was executed.

[kcze]

I modified it, so it only checks the last command executed.

Sensibly disallowing later re-execution would require more complex logic to determine whether the effect of a command has been compounded/altered since it was executed.

I'll do this in another PR, when I remove logs from AgentFileManager and use event_history instead.

[Pwuts]

LGTM!