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Caspian Inbox

Organization
TryCaspian
caspian-inbox

Caspian Inbox (caspian:Inbox) — list agent email and other configured channel conversations/messages. Use when the user asks for inbox, mail, unread email, Slack/Discord/channel messages via Caspian, or runs /caspian:inbox.

Overview

PublisherTryCaspian
Repositorycaspian-sdk
Skill namecaspian-inbox
Stars
974
Forks
137
Bundled files
Instructions only
LicenseApache-2.0
Links
  • Markdown instructions

    A SKILL.md file the model loads on demand, so it only costs tokens when a request actually matches.

  • Works with any LLM

    AI skills are plain Markdown, not provider-specific code, so this works with GPT, Claude, Gemini, Grok, or a local model.

  • Self-contained

    Everything the model needs lives in the instructions — no extra files to sync.

  • Open source

    Published by TryCaspian on GitHub. Read the source before you install it.

Installation

Install the Caspian Inbox AI skill in TypingMind to use it with any LLM, or drop it into another agent that reads SKILL.md.

1

Install in TypingMind

TypingMind installs a skill straight from its GitHub folder — it reads SKILL.md, bundles the resource files, and stores the result locally.

  1. Open the app and go to Plugins → Skills.
  2. Choose "Install from GitHub".
  3. Paste the skill folder URL below and confirm.
    https://github.com/TryCaspian/caspian-sdk/tree/main/packages/opencode/src/skills/caspian-inbox
  4. Enable the skill in any chat where you want it available.
Plugins → Skills → Add skill → From GitHub URL, then paste the folder URL and press Continue.
2

Install in another agent

Any agent that reads the Agent Skills format can use this skill — copy the folder into that agent's skills directory.

Claude Code — .claude/skills
git clone --depth 1 https://github.com/TryCaspian/caspian-sdk.git /tmp/caspian-sdk
mkdir -p .claude/skills
cp -r /tmp/caspian-sdk/packages/opencode/src/skills/caspian-inbox .claude/skills/caspian-inbox
Restart Claude Code after copying so it picks up the new skill.

Use it in TypingMind

Enable Caspian Inbox in any TypingMind chat and the model takes it from there. Its name and description sit in the system prompt, and the moment a request matches, the model loads the full instructions itself — you never invoke it by hand, and it costs no tokens until it is actually used.

The model loads Caspian Inbox on its own as soon as a request matches it.

Works with any AI model

AI skills are plain Markdown instructions rather than provider-specific code, so Caspian Inbox is not tied to the model it was written for. Install it once in TypingMind and use it with GPT-5, Claude, Gemini, Grok, DeepSeek, Mistral, Llama, or a local model you run yourself — all on your own API keys.

  • Loaded only when it is needed

    The system prompt carries just the name and description. The instructions are fetched on the first matching request, so an idle skill costs nothing.

  • Switch models mid-chat

    Because the skill is instructions rather than code, changing model does not break it — the next model reads the same SKILL.md.

Skill instructions

This is the SKILL.md content the model loads. Read it before installing — a skill is instructions your model will follow.

Caspian Inbox (caspian:Inbox)

List recent Caspian conversations and messages across configured channels (default: email; also any other channels enabled in plugin config).

When to use

  • User asks “what’s in my inbox?”, “show emails”, “list Caspian messages”
  • User runs /caspian:inbox or /caspian-inbox
  • User mentions unread mail or channel threads on the agent inbox

How

  1. Call the tool caspian_inbox with list true (default).
  2. Optionally pass:
    • channels — e.g. email or email,slack
    • conversationLimit — default 10
    • messageLimit — default 5
  3. Present the tool output to the user (connections + conversations + recent messages).
  4. Do not invent messages. If the tool errors, report the error.

Address only

If the user only wants the agent email address, call caspian_inbox with list: false.

Related

  • Send mail: tool caspian_send_email or /caspian:email
  • Inbound mail is also pushed into OpenCode sessions automatically by the plugin

Frequently asked questions

What does the Caspian Inbox AI skill do?

Caspian Inbox (caspian:Inbox) — list agent email and other configured channel conversations/messages. Use when the user asks for inbox, mail, unread email, Slack/Discord/channel messages via Caspian, or runs /caspian:inbox.

Why use Caspian Inbox on TypingMind?

Because you install it once and use it with any model. Caspian Inbox is plain Markdown rather than provider-specific code, so the same skill runs on GPT-5, Claude, Gemini, Grok, or a local model — and you can switch model mid-chat without it breaking. TypingMind runs on your own API keys, so you pay providers directly instead of a per-seat subscription, and your skills and chats stay in your own storage.

How do I install Caspian Inbox in TypingMind?

Open Plugins → Skills → Install from GitHub in TypingMind and paste https://github.com/TryCaspian/caspian-sdk/tree/main/packages/opencode/src/skills/caspian-inbox. TypingMind reads its SKILL.md and installs it as a skill you can enable per chat.

Which AI models can use Caspian Inbox?

Any model you connect in TypingMind. AI skills are plain Markdown instructions rather than provider-specific code, so GPT, Claude, Gemini, Grok, and local models can all load this skill when a request matches it.

How many AI models can I use with Caspian Inbox?

As many as you like. As long as a model supports skills, you can use Caspian Inbox with it — GPT, Claude, Gemini, Grok, DeepSeek, Mistral, Llama and more — all on TypingMind with your own API keys.

Is the Caspian Inbox AI skill free?

Yes. It is published on GitHub by TryCaspian under the Apache-2.0 license. You only pay your own AI provider for the tokens you use.

What are AI skills?

An AI skill is a reusable instruction bundle that teaches an AI model how to do one specific task. It follows the open Agent Skills format: a SKILL.md file with a name and description, plus any scripts, templates or reference files the model may need. The model reads the instructions only when your request matches the skill, so an installed skill costs nothing until it is used.

How are AI skills different from plugins or MCP servers?

A plugin or MCP server gives a model new tools to call — code that runs somewhere and returns a result. An AI skill gives the model knowledge and process instead: how to approach a task, which steps to follow, what good output looks like. Skills are plain Markdown, so they need no server, no API key and no runtime, and they work with any model.

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