I was a heavy user, but stopped using it mid 2024. It was essentially providing codebase context and editing and writing code as you instructed - a decent step up from copy/paste to ChatGPT but not working in an agentic loop. There was logic to attempt code edits again if they failed to apply too.

Edit: I stand corrected though. Did a bit of research and aider is considered an agentic tool by late 2023 with auto lint/test steps that feedback to the LLM. My apologies.