So you're back at square one.
Current AI (even GPT-4o) simply isn't capable enough to do useful stuff. You need to augment it somehow - either modularize it, or add RAG, or similar - and for all of those, you need the transcript.
I am sympathetic to this view but strongly disagree that you need a transcript. Think about it a bit more!!
I'm loving all these wild takes about LLMs, meanwhile LLMs are doing useful things for me all day.
If you need a way to perform complicated tasks with autonomy and exact rule following, your problem simply won't be solved right now.
Examples: Give an LLM an effective identity (prompt engineering), a value system (Constitutional AI), make it think about these things before it acts (CoT + system prompt), have a more capable [more expensive / higher inference] agent review the LLMs work from time to time (multi-agent), have a more capable agent iterate on prompts to improve results in a test environment (EvoAgents), etc.
We can't simply provide an off the shelf LLM with a paragraph or two and expect it to reliably fulfill an arbitrary task without supervision any more than we can expect the same from a random nihilist going through an identity crisis. They both need identity, values, time to think, social support, etc. before they can be reliable workers.