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contextos

v2.5.1

Context operating system for AI coding agents: the agent states intent and the OS orchestrates AST slicing, out-of-context commands, derived architecture indexing and evidence capture.

Codex1 Skill1 MCP serverstdio

By ContextOS10 GitHub starsUpdated 3 days ago

Directory evidence

Runtimes
Codex
Parsed components
2 skill or MCP entries
Source updated
Sep 21, 2026
Manifest status
Canonical path parsed

The directory validates manifest shape and source location. It does not execute the plugin or provide a security endorsement. Review the indexing methodology →

Install contextos for Codex

Installs for the current user
codex plugin marketplace add yubinbin32-ops/ContextOS
codex plugin marketplace upgrade contextos-development
codex plugin add contextos@contextos-development

Paste and run these commands in a terminal with Codex. They add and refresh the contextos-development catalog, then install this plugin.

Compatibility: the page URL and API slug “contextos” remain stable.

  • Codex: contextos@agent-plugin-marketplace → contextos@contextos-development

The installer fetches third-party code from the source repository shown on this page. This directory validates manifest structure and source location, but does not perform a security audit; review the manifest, components, and source before installing.

Get the source manually
git clone https://github.com/yubinbin32-ops/ContextOS

Clone the source repository, then follow its setup instructions to add the plugin to a compatible client. The plugin root is plugins/contextos/.

Plugin files

plugins/contextos/
├── .codex-plugin/plugin.json
├── skills/contextos/SKILL.md
└── .mcp.json

Included Skills1

contextosskills/contextos/SKILL.md

MUST be used whenever starting ANY coding task, exploring or understanding codebase architecture, adding features, fixing bugs, refactoring, or reading/editing code (进行代码开发、架构理解、新功能实现或读写代码时必须调用). If the ContextOS tools are not loaded, call tool_search for ContextOS first. Prefer explore to locate, change to edit or create files, verify to run tests and builds, ship to close the loop with receipts; the OS orchestrates AST slicing, out-of-context commands, derived module indexing and evidence capture on the server side. Native tools are allowed only for the explicit exceptions in section 7 and the reason must be stated.

MCP servers1

contextosstdio
command
node
args
--no-warnings=ExperimentalWarning ./server/contextos-mcp.mjs
cwd
.

Plugin manifests1

plugins/contextos/.codex-plugin/plugin.json
{
  "name": "contextos",
  "version": "2.5.1",
  "description": "Context operating system for AI coding agents: the agent states intent and the OS orchestrates AST slicing, out-of-context commands, derived architecture indexing and evidence capture.",
  "author": {
    "name": "ContextOS"
  },
  "skills": "./skills/",
  "interface": {
    "displayName": "ContextOS",
    "shortDescription": "Intent-level context OS: explore, change, verify, ship.",
    "longDescription": "State what you want and the OS does the rest: it slices code with a real AST engine, keeps terminal output out of context, derives architecture modules from source, attaches verification receipts automatically and returns everything inside a context budget.",
    "developerName": "ContextOS",
    "brandColor": "#111111",
    "composerIcon": "./assets/topic-logo.png",
    "logo": "./assets/topic-logo.png",
    "logoDark": "./assets/topic-logo-dark.png",
    "category": "Productivity",
    "capabilities": [
      "Project context retrieval",
      "Contract-first AST code streams",
      "Derived architecture module indexing",
      "Intent-level orchestration (explore, change, verify, ship)",
      "Budgeted context responses",
      "Redacted project-local command gateway",
      "AST locators and source-drift protection",
      "Automatic receipt and evidence capture",
      "Architecture and progress synchronization",
      "OS Markdown documents and chapter retrieval",
      "Resumable sessions and manual passthrough to every legacy capability",
      "Read-only README in the knowledge reader"
    ],
    "defaultPrompt": [
      "Use ContextOS explore/change/verify/ship to do this task and keep the project graph synchronized."
    ]
  },
  "mcpServers": "./.mcp.json"
}

For maintainers

If you maintain this plugin, link to this source-backed listing from your README so users can review its manifest and indexed components.

[contextos on Agent Plugins Marketplace](https://pluginsmp.com/plugins/contextos)