spellcast

v0.3.0

Spellcast desktop Canvas and independent asides for the current Codex task.

Codex1 Skill1 MCP serverStreamable HTTP

By SpellcastLicense: AGPL-3.0-or-later1 GitHub starsUpdated 5 days ago

Directory evidence

Runtimes: Codex
Parsed components: 2 skill or MCP entries
Source updated: Sep 18, 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 spellcast for Codex

Installs for the current user

codex plugin marketplace add IchenDEV/agent-plugin-mkt
codex plugin marketplace upgrade agent-plugin-marketplace
codex plugin add spellcast@agent-plugin-marketplace

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

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/Vanyangyang/spellcast

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

Plugin files

spellcast/

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

Included Skills1

spellcastskills/spellcast/SKILL.md

Use connected Spellcast for independent asides as fresh project context emerges during ongoing work, or for its Canvas, task feedback, and explicit memory.

MCP servers1

spellcastStreamable HTTP

url: http://127.0.0.1:47194/mcp

Plugin manifests1

.codex-plugin/plugin.json

{
  "name": "spellcast",
  "version": "0.3.0",
  "description": "Spellcast desktop Canvas and independent asides for the current Codex task.",
  "author": {
    "name": "Spellcast"
  },
  "license": "AGPL-3.0-or-later",
  "keywords": [
    "spellcast",
    "canvas",
    "observer"
  ],
  "skills": "./skills/",
  "mcpServers": "./.mcp.json",
  "interface": {
    "displayName": "Spellcast",
    "shortDescription": "Desktop Canvas and optional independent asides.",
    "longDescription": "Connects Codex to a local Spellcast instance over loopback HTTP. Independent asides follow the product switch in Spellcast Settings. Windows packaging of the native hook helper has been verified; other operating systems are not claimed as tested. Installing this plugin is not the same as trusting its hooks.",
    "developerName": "Spellcast",
    "category": "Productivity",
    "capabilities": [
      "Interactive"
    ],
    "defaultPrompt": [
      "Use Spellcast Canvas for this task.",
      "When asides are on, submit a short spellcast_checkpoint at the first substantial context and at later new evidence or constraints. Do not pre-judge bubble value.",
      "Do not start observers unless Spellcast returns ready."
    ]
  }
}

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.

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