The Series — 8 Articles
ARTICLE 01
The 10,000-Foot View
Four modular buildings, one shared core, and the queue that powers everything. The complete architecture overview.
ARTICLE 02
The Nervous System
The SQ/EQ protocol: submission queues, event queues, and the async channels that decouple every component.
ARTICLE 03
The Brain
The orchestrator, session management, prompt assembly, model communication, and the relentless tool-call loop.
ARTICLE 04
The Vault
Multi-layered sandboxing — Bubblewrap, Seccomp, Landlock on Linux; Seatbelt on macOS. How every command is contained.
ARTICLE 05
Four Windows
One core engine, four interfaces — TUI, headless executor, JSON-RPC server, and MCP bridge. Same brain, different hands.
ARTICLE 06
The Swiss Army Knife
Shell exec, file patches, web search, and MCP servers. How Codex transforms into a universal integration platform.
ARTICLE 07
The Safety Net
Six layers of defense — ExecPolicy DSL, approval chains, lifecycle hooks, secret detection, and shell escalation guards.
ARTICLE 08
Building on the Giant
TypeScript & Python SDKs, custom MCP servers, architecture patterns worth stealing, and what comes next.