Studio activation workflows save outputs to generated assets for your brand. Campaign Builder lives at /halo-studio/campaign-builder. Activate messages at /studio/messaging/matrix is an optional activation tool — not a Brand Foundation step.
Campaign Builder: /halo-studio/campaign-builder — brief → AI concept & headlines → edit → channel copy → review.
Activate messages (messaging matrix): /studio/messaging/matrix — optional Studio tool opened from Messaging Architecture. Pillars prefilled from your Messaging Architecture session when available. Quick grid = fast pain × pillar copy cells. Strategic system = full brief with channel roles and QA. Use ?return=/strategy/messaging to return to Messaging Architecture.
Credits and governance
Each step uses your plan credits. Matrix runs one generation per cell (with concurrency limits) plus alignment checks. Low scores surface in the UI; you can follow up in Brand governance like other tools.
Pre-fill pillars from your Messaging Architecture workflow session when present, then from published Messaging pillars strategy fields—both pages read them automatically for faster input.