Learn Codex
Timeline
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Layers
EN
中文
Tools & Execution
s01
The Agent Loop
s02
Tool Use
s03
Approval & Permissions
s04
Sandbox
Planning & Control
s05
The Plan Tool
s06
Subagents
s07
Skills
s10
Instructions & AGENTS.md
s11
Error Recovery
Memory Management
s08
Context Compaction
s09
Memory & Sessions
Concurrency & Automation
s13
Background Tasks
s14
Automations
Multi-Agent Platform
s12
Task System
s15
Agent Teams
s16
Team Protocols
s17
Autonomous Agents
s18
Worktree Isolation
s19
MCP Servers
s20
The Full Harness
Codex in Depth
s21
The Codex CLI Surface
s22
config.toml in Depth
s23
Review, CI & Cloud
s24
Plugins, Apps & Hooks
s25
Tools Beyond the Shell
s26
Local Models & Custom Providers
s27
Codex as a Service & the Other Surfaces
s28
Sessions, Sandbox & Safety in Depth
Compare Versions
See what changed between any two versions
Version A
-- select --
s01 - The Agent Loop
s02 - Tool Use
s03 - Approval & Permissions
s04 - Sandbox
s05 - The Plan Tool
s06 - Subagents
s07 - Skills
s08 - Context Compaction
s09 - Memory & Sessions
s10 - Instructions & AGENTS.md
s11 - Error Recovery
s12 - Task System
s13 - Background Tasks
s14 - Automations
s15 - Agent Teams
s16 - Team Protocols
s17 - Autonomous Agents
s18 - Worktree Isolation
s19 - MCP Servers
s20 - The Full Harness
s21 - The Codex CLI Surface
s22 - config.toml in Depth
s23 - Review, CI & Cloud
s24 - Plugins, Apps & Hooks
s25 - Tools Beyond the Shell
s26 - Local Models & Custom Providers
s27 - Codex as a Service & the Other Surfaces
s28 - Sessions, Sandbox & Safety in Depth
Version B
-- select --
s01 - The Agent Loop
s02 - Tool Use
s03 - Approval & Permissions
s04 - Sandbox
s05 - The Plan Tool
s06 - Subagents
s07 - Skills
s08 - Context Compaction
s09 - Memory & Sessions
s10 - Instructions & AGENTS.md
s11 - Error Recovery
s12 - Task System
s13 - Background Tasks
s14 - Automations
s15 - Agent Teams
s16 - Team Protocols
s17 - Autonomous Agents
s18 - Worktree Isolation
s19 - MCP Servers
s20 - The Full Harness
s21 - The Codex CLI Surface
s22 - config.toml in Depth
s23 - Review, CI & Cloud
s24 - Plugins, Apps & Hooks
s25 - Tools Beyond the Shell
s26 - Local Models & Custom Providers
s27 - Codex as a Service & the Other Surfaces
s28 - Sessions, Sandbox & Safety in Depth
Select two versions above to compare them.