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 191-195 of 235 articles.

Product

Facio's HITL Tool Suite: How ask_approval, ask_form, and ask_selection Keep Humans in Control

May 31, 2026Product

Facio's HITL Tool Suite: How ask_approval, ask_form, and ask_selection Keep Humans in Control

Most agent platforms treat human approval as a binary step: approve or reject. Facio's HITL tools — ask_approval, ask_form, ask_selection, and ask_text_input — turn human-agent interaction into structured workflows with custom options, password-gated credential capture, markdown review, and timeout handling. Here's how each tool works and when to use it in production.

Security

Poison Once, Exploit Forever: The Memory Poisoning Threat That Outlives Every Session

May 31, 2026Security

Poison Once, Exploit Forever: The Memory Poisoning Threat That Outlives Every Session

Memory poisoning turns prompt injection into a stateful attack. MINJA achieves 95% injection success, AgentPoison exceeds 80% at under 0.1% poison rate, and Gemini's memory feature was compromised through delayed tool invocation. Here's what defense in depth actually requires.

Human-in-the-loop

The HITL Timeout Problem: What Happens When Your Human Reviewer Doesn't Respond

May 31, 2026Human-in-the-loop

The HITL Timeout Problem: What Happens When Your Human Reviewer Doesn't Respond

Every HITL system eventually hits the same operational question: the reviewer didn't respond. Does the agent wait forever? Auto-approve? Auto-deny? The answer isn't a setting — it's a timeout strategy with consequences for safety, throughput, and compliance.

Engineering

MCP Spotlight: WebDriverIO MCP — Browser + Mobile App Automation, One Server, 34 Tools

May 30, 2026Engineering

MCP Spotlight: WebDriverIO MCP — Browser + Mobile App Automation, One Server, 34 Tools

The official WebDriverIO MCP server gives AI agents 34 tools to automate Chrome, Firefox, Edge, and Safari browsers — plus iOS and Android apps via Appium — all through a unified interface. Session recording, device emulation, and BrowserStack support included.

Product

Facio's Spawn System: How Parallel Sub-Agents Multiply Agent Throughput

May 30, 2026Product

Facio's Spawn System: How Parallel Sub-Agents Multiply Agent Throughput

Gartner predicts 40% of agentic AI projects will be cancelled by 2027 due to escalating costs. One reason: most agent platforms run tasks sequentially. Facio's spawn system lets agents delegate work to parallel sub-agents — each with isolated context, optional model overrides, and direct filesystem access — and collect results asynchronously. Here's how the architecture works and when to use it.