Comments, posts, and likes happen on hardware that stays in your house. You are not renting a cloud desktop, and there is no multi-tenant browser instance in someone else’s data center holding your authenticated sessions.
What you need
Raspberry Pi 5, 16 GB recommended. A2 microSD, 64 GB minimum. Official 27W USB-C power supply — most mysterious failures on a Pi are power failures wearing a software costume.
Why it is built this way
There is a category difference between software that helps you write and software that speaks as you. The second is a representative, and where a representative runs is a trust decision rather than an implementation detail. The argument in full is in your social agent should live in your house.
Then connect it
Set up the Pi, then connect it to Microphone so the voice agent can deploy social media subagents. The step-by-step version is in how to run social media from a Raspberry Pi.