Four C's of an AI Operating System

The sequential framework Nate Herk uses to build and teach a personal AI Operating System (AIOS) in Claude Code. The four layers are Context, Connections, Capabilities, and Cadence — and they must be built in order.

Key points

• Context — what the AI knows about you, your business, your goals, and your constraints. Captured in CLAUDE.md, context files, and the onboarding interview ^[src-013]
• Connections — what data sources the AIOS can reach: calendar, email, task manager, meetings, revenue dashboards. Wired via APIs or MCPs ^[src-013]
• Capabilities — what the AIOS can produce: skills (reusable markdown SOPs), reference files, and task-specific sub-agents ^[src-013]
• Cadence — when it acts autonomously: cloud routines, /loop cron jobs, and daily planning habits ^[src-013]
• In the Opus 4.8 AIOS walkthrough, Nate applies the same four layers to his real second-brain operating system: business/project context, connections to recurring work surfaces, skills and templates as capabilities, and scheduled routines or usage habits as cadence ^[src-087].
• The framework now functions as both a build sequence and a diagnostic checklist: if an AIOS feels weak, ask whether it lacks context, useful connections, reusable capabilities, or an actual cadence of use ^[src-087].

The order is non-negotiable: "You can't have cadence without connections. You can't have capability without context" ^[src-013].

Related entities

• Claude Code — the primary harness for building an AIOS
• Nate Herk — coined this framework

Related concepts

• Three Ms Of AI — the mindset layer that precedes the Four C's
• Aios Tier One Domains — the seven data domains to connect in the C2 phase
• Six Step Skill Building Framework — how to build capabilities in C3
• Claude Code Cloud Routines — the primary cadence mechanism
• Claude Code Memory — where context lives
• Progressive Context Loading — how skills stay lightweight
• AI Memory Operating System — broader memory/control-plane pattern
• Agent Harness Portability — keeping AIOS context usable across Claude Code, Codex, Hermes, and future harnesses

Source references

• ^[src-013] Nate Herk — "Build & Sell Claude Code Operating Systems (2+ Hour Course)" (2026-05-01)
• ^[src-087] Nate Herk — "I Turned Claude Opus 4.8 Into My Entire AI Operating System" (2026-05-29)