Facio Blog

Practical notes on human-reviewed AI agents.

Payload-powered product notes, security writing, HITL patterns, and operational guidance from the Facio runtime: long sessions, Placet approvals, audit trails, memory, providers, channels, tools, and Docker-first operations.

Showing 171-175 of 235 articles.

Product

Facio's Built-in Log System: How read_logs Makes Agent Execution Auditable in Real Time

Jun 5, 2026Product

Facio's Built-in Log System: How read_logs Makes Agent Execution Auditable in Real Time

When an AI agent makes a mistake at 4 AM, you need to know what happened — not wait for a human to grep through server logs. Facio's read_logs tool gives agents access to their own persistent execution log, with level filtering, time-range queries, and regex search. The agent diagnoses its own failures. Here's how the architecture works and why self-auditability matters for production autonomy.

Security

The NSA Just Published MCP Security Guidance: What the Five-Layer Threat Model Means for Your Agents

Jun 5, 2026Security

The NSA Just Published MCP Security Guidance: What the Five-Layer Threat Model Means for Your Agents

The Model Context Protocol is now critical infrastructure — confirmed by the NSA's formal Cybersecurity Information Sheet. From transport-layer interception to context poisoning to supply chain threats, every MCP deployment faces a five-layer attack surface that traditional API security doesn't cover.

Human-in-the-loop

The HITL Maturity Model: Where Is Your Organization — And What Comes Next?

Jun 5, 2026Human-in-the-loop

The HITL Maturity Model: Where Is Your Organization — And What Comes Next?

Every organization implementing HITL goes through the same progression — from ad-hoc prompts to deterministic policy engines. Knowing which stage you're at tells you what to fix next. Here's the four-level maturity model, how to self-assess, and what each transition requires.

Engineering

MCP Spotlight: Pathrule — Path-Scoped Context That Cuts AI Agent Token Waste by 85%

Jun 4, 2026Engineering

MCP Spotlight: Pathrule — Path-Scoped Context That Cuts AI Agent Token Waste by 85%

Pathrule attaches AI agent context (memories, rules, skills) to directory paths instead of flat files, with signal-based retrieval and self-auditing detectors. 30 MCP tools, measured 85% fewer input tokens per session.

Product

Facio's Multi-Provider Architecture: How switch_model Enables Dynamic Model Routing

Jun 4, 2026Product

Facio's Multi-Provider Architecture: How switch_model Enables Dynamic Model Routing

Locking an AI agent to a single model provider is like locking a developer to a single programming language — it works until it doesn't. Facio's switch_model tool lets agents change LLM providers mid-conversation with human approval, enabling cost-optimized routing, provider fallback, and capability-aware task delegation across OpenAI, Anthropic, Google, OpenRouter, and any OpenAI-compatible endpoint.