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cosmicdreams
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slack

Retrieve Slack channel history and search results as raw JSON data.

Updated Feb 28, 2026
Search Tags:#cli#slack#message retrieval#thread messages#channel search#workspace config#raw json
One-click install
npx skills add https://github.com/cosmicdreams/claude-plugins --skill slack-cosmicdreams
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: slack
Source: https://github.com/cosmicdreams/claude-plugins/tree/main/lib/skills/slack
Command: npx skills add https://github.com/cosmicdreams/claude-plugins --skill slack-cosmicdreams

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

You need up-to-date Slack channel content and message history, but you want it delivered as raw data so you can analyze, filter, or rank it elsewhere.

Core Features & Use Cases

  • Read-only Slack CLI access: List joined conversations and fetch recent messages without sending, posting, or modifying anything in Slack.
  • Channel and thread retrieval: Get recent messages from a channel or pull an entire thread by parent message timestamp.
  • Search and workspace-aware querying: Search across messages (optionally scoped to a channel) and fetch from the correct workspace using workspace URL when needed.
  • Config-driven defaults: Automatically use channels and message limits from ~/.claude/office-slack.local.md when present.

Quick Start

Use the slack skill to read recent messages from the engineering channel by running the instruction: fetch the latest messages from engineering.

Frequently Asked Questions about slack

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I retrieve Slack channel history as raw JSON for downstream analysis?▼

You can retrieve Slack channel history as raw JSON by using a read-only CLI to fetch recent messages and searchable results without summarization. This returns unmodified data for filtering, ranking, or analyzing elsewhere.

Can I fetch Slack thread messages by their timestamp?▼

Yes, you can fetch Slack thread messages by specifying the parent message timestamp using the thread_ts parameter. This pulls the entire thread as raw JSON data for downstream processing.

Do I need to authenticate a Slack CLI before fetching workspace messages?▼

Yes, you must install and authenticate the agent-slack CLI before fetching workspace messages. Once authenticated, you can optionally specify a workspace URL to ensure you retrieve data from the correct Slack workspace.

How do I search for specific messages across a Slack channel?▼

You can search for specific messages across a Slack channel by providing a query parameter. The search can be scoped to a specific channel or run across the entire workspace, returning matching messages as raw JSON.

Can I set default channels and message limits for Slack data retrieval?▼

Yes, you can set default channels and message limits by adding configuration values to a local markdown file. When present, these config-driven defaults are automatically applied during message retrieval operations.

Does this Slack message retrieval method send or modify any data in the workspace?▼

No, this Slack message retrieval method is strictly read-only. It lists joined conversations, fetches recent messages, and searches message history without sending, posting, or modifying anything in the Slack workspace.

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