slack

slack is a skill for Claude Code, Codex from Arvo-AI/aurora. It costs 13 tokens per session (459 once invoked), scanned A, original, Apache-2.0.

Read-only Slack tools for finding messages and replies in channels. Slack is a team chat system commonly used for incident discussions and operational updates.

In plain words
What is it for?
List accessible channels, read channel history for a time range, and open relevant thread replies during an incident investigation.
Why use it?
They gather human context that may explain deployment decisions, communication gaps, alerts, and how an incident was resolved.

Skill for Claude CodeCodex

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add skills/arvo-ai/aurora/slack
Any agent
npx skills add Arvo-AI/aurora --skill slack
Clone the repo
git clone --depth 1 https://github.com/Arvo-AI/aurora

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for slack

README.md
[![agentmods](https://agentmods.dev/badge/skills/arvo-ai/aurora/slack.svg)](https://agentmods.dev/skills/arvo-ai/aurora/slack)
Your own site
<a href="https://agentmods.dev/skills/arvo-ai/aurora/slack"><img src="https://agentmods.dev/badge/skills/arvo-ai/aurora/slack.svg" alt="Measured on agentmods" height="20"></a>
Per session 13 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 459 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00013 $0.00459
Opus 5 $0.00006 $0.00230
Sonnet 5 $0.00003 $0.00092
Haiku 4.5 $0.00001 $0.00046

Measured 6d ago against content hash 78d553d64f03, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-05, from the pricing page.

Security

Grade A, and why

slack scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 6d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

server/chat/backend/agent/skills/integrations/slack/SKILL.md · 48 lines

What it actually says

Slack Tools

Overview

Read-only tools for searching Slack conversations. Used during postmortem generation to gather human context (deployment decisions, communication gaps, resolution steps) and during interactive chat for incident investigation.

Tools

list_slack_channels()

Returns all channels the bot can access: id, name, topic, purpose, member count. Use channel names and topics to identify relevant channels for the incident (look for service names, "incident", "oncall", "alerts").

get_channel_history(channel_id, oldest?, latest?, limit?)

Fetch messages from a channel. Scope with oldest/latest (ISO 8601) to the incident time window. Returns message text, timestamps, user IDs, and thread metadata (reply_count, thread_ts).

get_thread_replies(channel_id, thread_ts, limit?)

Fetch replies in a thread. Use when a message has reply_count > 0 and looks relevant.

Strategy for Incident Investigation

  1. Call list_slack_channels — scan names/topics for the affected service or "incident"/"oncall" keywords
  2. Call get_channel_history on the most relevant channels, scoped to the incident time window
  3. Look for messages about: deployments, rollbacks, alerts firing, team handoffs, escalations
  4. If a message has reply_count > 0 and looks relevant, call get_thread_replies for full context

Limitations

  • Read-only — cannot post messages
  • Bot must be a member of the channel to read it
  • No cross-channel search — must check channels individually by name
Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 6d ago First seen · 48 lines · 13 tokens per session scan A 78d553d64f03

Subscribe to this mod's changes

slack is a skill published in the GitHub repository Arvo-AI/aurora (404 stars, last pushed today), licensed Apache-2.0. It adds 13 tokens to every session and 459 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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