agentmods.dev

slack

A Slack connection for reading and searching team conversations, checking unread channels, sending messages, managing reactions, and finding users.

In plain words
What is it for?
Use it to review channel history, find past discussions, check unread messages, contact teammates, add reactions, and look up people.
Why use it?
It helps you handle team communication from a coding agent instead of switching between tools or manually searching Slack.

Skill for Claude CodeCodex

286 8d ago A scan 90 tokens original MIT
View the source file sigcli/sigcli
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/sigcli/sigcli/slack
Any agent
npx skills add sigcli/sigcli --skill slack
Clone the repo
git clone --depth 1 https://github.com/sigcli/sigcli

Made for: Claude Code, Codex.

Per session 90 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,073 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 $0.00090 $0.02073
Opus 5 $0.00045 $0.01037
Sonnet 5 $0.00018 $0.00415
Haiku 4.5 $0.00009 $0.00207

Measured 2d ago against content hash 28691b427dc8, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, 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 2d ago.

The scan reads SKILL.md. This mod also ships 19 executable files (scripts/__init__.py, scripts/slack_channels.py, scripts/slack_client.py, …), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

skills/slack/SKILL.md · 187 lines

How it starts

The opening of the file, as written. The whole thing — 187 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Slack

Read channels, search messages, check unreads, send messages, manage reactions, and look up users via Slack.

Setup (run FIRST — every time, before any operation)

You MUST complete this setup before running any script. Do NOT skip this step.

sig status app-slack 2>&1

Check the JSON output fields configured and valid:

  • configured: false → run Provider Setup below. Do NOT proceed without completing it.
  • valid: false (but configured: true) → run sig login app-slack, then re-check.
  • valid: true → detect proxy (see below), then execute the user's request.

Provider Setup

  1. Read <SKILL_DIR>/references/provider-config.yaml
  2. Append the provider block to ~/.sig/config.yaml under providers:
  3. Ask the user: "Do you need a proxy to access this site?" — if yes, add networkProxy: <url> under the provider in config.yaml
  4. Run sig login app-slack (with --network-proxy <url> if proxy was specified)
  5. Verify: run sig status app-slack again — must show valid: true before proceeding

Proxy Detection (after provider is valid)

grep -A15 "^\s*app-slack:" ~/.sig/config.yaml | grep networkProxy | awk '{print $2}'

If this outputs a URL, prefix ALL python3 commands with HTTPS_PROXY=<url> HTTP_PROXY=<url>. If using socks5, convert to socks5h for python (e.g. socks5://... → socks5h://...). If empty, no proxy needed.

Running Scripts

All scripts require setup to be completed first (see above).

Scripts Reference

All scripts are in this skill's scripts/ directory. Run via Bash tool.

Script Purpose
slack_channels.py List/filter channels
slack_history.py Get channel/DM message history
slack_threads.py Get thread replies
slack_search.py Search messages with filters
slack_send.py Send message or threaded reply
slack_unreads.py Get unread messages across channels
slack_users.py Search users by name/email
slack_reactions.py Add or remove emoji reactions

Read the full file on GitHub · 187 lines

Files

What ships with it

21 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 2d ago First seen · 187 lines · 90 tokens per session scan A 28691b427dc8

Subscribe to this mod's changes

slack is a skill published in the GitHub repository sigcli/sigcli (286 stars, last pushed 8d ago), licensed MIT. It adds 90 tokens to every session and 2,073 once invoked, about $0.0005 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.

Code reviewProductivityResearch
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