The European Commission designated ChatGPT, Reddit, and Roblox as "very large online platforms" under its Digital Services Act, forcing them to remove illegal content and protect minors or face fines up to 6% of global revenue. All three services exceeded 45 million EU monthly users, triggering stricter regulatory requirements by year-end.

• ChatGPT joins X's Grok in facing DSA investigations, marking the EU's expanding enforcement of digital safety rules on AI services
• Companies must comply with obligations including illegal content removal and minor protection by December 31 or face substantial penalties
• The 45-million-user threshold automatically triggers enhanced scrutiny, meaning any platform crossing that mark in the EU becomes subject to these rules

Yanli Liu clones Anthropic’s open-sourced finance agent repo and identifies four key architectural patterns—single-source dual-delivery, write-holder isolation, schema-validated trust boundaries, and prompt-based guardrails—that set regulated-industry agents apart from generic frameworks. She also flags a 20% gap of non-code compliance artifacts (risk registers, accuracy declarations, transparency docs) needed to meet the EU AI Act’s high-risk requirements.

• Anthropic's finance agent templates use one markdown system prompt per agent that drives both interactive and headless modes, with no runtime prompt assembly
• Each agent splits duties across subagents (one writes, one reads, one enforces rules) to limit damage if the LLM misbehaves, mirroring bank workflows
• Data between agents is passed as regex/length-constrained JSON schemas rather than free text, blocking prompt injection from masquerading as instructions
• Guardrails like "recommend, don't decide" are prompt-based, not hard-enforced, and 3 of the 10 templates trigger EU AI Act high-risk rules on August 2, leaving roughly 20% of compliance work (risk registers, accuracy statements) still needed