1
Resolve the brand
list_brand_kits and pick the active one: the only one, the default, or ask the user which.2
Read the voice
get_brand_kit with detail: "summary" to see what the kit holds, then with tabs: ["voice"] for the voice sections. Summarize the tone and the principles it writes by back in a line.3
Cache it
Write
active_brand_kit_id (and any default avatar and connected accounts) to .contenthero/context.md at the workspace root.