Arcus — Research & Announcements https://arcusx.ai/blog-index.html Protocol releases, technical thinking, and updates from Arcus Labs. en-us Releasing irg-reference: An Open Implementation of the IRG Protocol https://arcusx.ai/blog/2026-05-04-irg-reference-release.html https://arcusx.ai/blog/2026-05-04-irg-reference-release.html Mon, 04 May 2026 00:00:00 GMTEngineering Two Kinds of Momentum: Why Fresh Calls Change the Reasoning Process https://arcusx.ai/blog/two-kinds-of-momentum.html https://arcusx.ai/blog/two-kinds-of-momentum.html Tue, 14 Jul 2026 00:00:00 GMTThinking The Compression of Reasoning: What VibeThinker-3B Actually Demonstrates https://arcusx.ai/blog/compression-of-reasoning.html https://arcusx.ai/blog/compression-of-reasoning.html Mon, 13 Jul 2026 00:00:00 GMTTechnical Reasoning Strategies, Part 1: The Epistemic Family https://arcusx.ai/blog/reasoning-strategies-epistemic.html https://arcusx.ai/blog/reasoning-strategies-epistemic.html Thu, 02 Jul 2026 00:00:00 GMTTechnical Active vs. Passive Governance: The Distinction That Decides What AI Can Do https://arcusx.ai/blog/active-vs-passive-governance.html https://arcusx.ai/blog/active-vs-passive-governance.html Fri, 26 Jun 2026 00:00:00 GMTThinking SR 26-2 Supersedes SR 11-7 — and the Arcus SR 26-2 Model Risk Suite Is Available Today https://arcusx.ai/blog/sr-26-2-model-risk-suite.html https://arcusx.ai/blog/sr-26-2-model-risk-suite.html Sun, 14 Jun 2026 00:00:00 GMTAnnouncement Measuring Reasoning Quality: Why Accuracy Benchmarks Miss the Point https://arcusx.ai/blog/measuring-reasoning-quality.html https://arcusx.ai/blog/measuring-reasoning-quality.html Mon, 18 May 2026 00:00:00 GMTTechnical From the Perimeter to the Core: Why Auditability Unlocks AI Adoption https://arcusx.ai/blog/perimeter-to-core-auditability.html https://arcusx.ai/blog/perimeter-to-core-auditability.html Mon, 11 May 2026 00:00:00 GMTThinking The Colorado AI Act Is Live: What It Requires and What It Doesn’t https://arcusx.ai/blog/2026-05-04-colorado-ai-act.html https://arcusx.ai/blog/2026-05-04-colorado-ai-act.html Mon, 04 May 2026 00:00:00 GMTThinking Prompt Sets as Epistemic Personalities: Same Graph, Different Reasoning https://arcusx.ai/blog/2026-04-27-prompt-sets-epistemic-personalities.html https://arcusx.ai/blog/2026-04-27-prompt-sets-epistemic-personalities.html Mon, 27 Apr 2026 00:00:00 GMTTechnical What Model Validation Looks Like When the Model Is an LLM https://arcusx.ai/blog/2026-04-22-llm-model-validation.html https://arcusx.ai/blog/2026-04-22-llm-model-validation.html Wed, 22 Apr 2026 00:00:00 GMTThinking Why AI Hallucination Rates Get Worse Where It Matters Most https://arcusx.ai/blog/2026-03-25-ai-hallucination-rates.html https://arcusx.ai/blog/2026-03-25-ai-hallucination-rates.html Wed, 25 Mar 2026 00:00:00 GMTThinking EU AI Act Articles 9–15: A Technical Reading for Engineering Teams https://arcusx.ai/blog/2026-03-19-eu-ai-act-technical.html https://arcusx.ai/blog/2026-03-19-eu-ai-act-technical.html Thu, 19 Mar 2026 00:00:00 GMTThinking What SR 11-7 Means for AI-Driven Decision Making https://arcusx.ai/blog/2026-03-17-sr-11-7.html https://arcusx.ai/blog/2026-03-17-sr-11-7.html Tue, 17 Mar 2026 00:00:00 GMTThinking The Difference Between Logging and Governance in AI Systems https://arcusx.ai/blog/logging-vs-governance.html https://arcusx.ai/blog/logging-vs-governance.html Mon, 23 Feb 2026 00:00:00 GMTThinking Introducing EIE: A Protocol for Measuring Epistemic Integrity in AI Systems https://arcusx.ai/blog/introducing-eie.html https://arcusx.ai/blog/introducing-eie.html Mon, 26 Jan 2026 00:00:00 GMTProtocol Release Introducing IRG: A Protocol for Persistent, Structured AI Reasoning https://arcusx.ai/blog/introducing-irg.html https://arcusx.ai/blog/introducing-irg.html Mon, 26 Jan 2026 00:00:00 GMTProtocol Release