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.
npx agentmods add skills/slackapi/slack-skills-plugin/slack-clinpx skills add slackapi/slack-skills-plugin --skill slack-cligit clone --depth 1 https://github.com/slackapi/slack-skills-pluginWhat 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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5 | $0.00083 | $0.02629 |
| Opus 5 | $0.00042 | $0.01314 |
| Sonnet 5 | $0.00017 | $0.00526 |
| Haiku 4.5 | $0.00008 | $0.00263 |
Grade C, and why
slack-cli scanned grade C with 2 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.
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.
Downloads and executes remote codehighSupply chain
curl | sh runs whatever the server returns today, which is not necessarily what it returned when this was reviewed.
curl -fsSL https://downloads.slack-edge.com/slack-cli/install.sh | bash Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
curl -fsSL https://downloads.slack-edge.com/slack-cli/install.sh | bash How it starts
The opening of the file, as written. The whole thing — 250 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Slack CLI
Use the Slack CLI to create, run, and manage Slack apps — including calling Web API methods directly and searching Slack developer documentation from the terminal.
For initial setup (sandbox creation, project scaffolding from templates), use the slack:create-slack-app skill instead.
Step 1: Detect the Slack CLI
Resolve the path to the public Slack CLI before running any other command. We refer to the resolved value as SLACK_CMD — substitute it everywhere below. Try 1a → 1b → 1c in order; do not skip ahead.
1a. Standard install path (preferred — no verification needed)
The official install scripts place the binary at a fixed per-user path. If the file exists, use it directly: only the install script writes to that path.
- macOS / Linux:
~/.slack/bin/slack - Windows:
%USERPROFILE%\AppData\Local\slack-cli\bin\slack.exe(or%USERPROFILE%\.slack-cli\bin\slack.exeas a fallback)
POSIX shell:
[ -x "$HOME/.slack/bin/slack" ] && echo "$HOME/.slack/bin/slack"
PowerShell:
$p = "$env:USERPROFILE\AppData\Local\slack-cli\bin\slack.exe"
if (Test-Path $p) { $p } elseif (Test-Path "$env:USERPROFILE\.slack-cli\bin\slack.exe") { "$env:USERPROFILE\.slack-cli\bin\slack.exe" }
If a path is returned, set SLACK_CMD to that absolute path and proceed to Step 2. Do not also run _fingerprint.
1b. slack on PATH (verify with fingerprint)
If 1a found nothing, try slack on PATH:
slack _fingerprint 2>/dev/null
If it outputs d41d8cd98f00b204e9800998ecf8427e, set SLACK_CMD=slack and proceed.
1c. Ask about an alias, or install
If 1b fails or returns a different value, ask the developer using AskUserQuestion:
- "The
slackcommand on your system doesn't appear to be the public Slack CLI. Do you have it installed under a different name or alias?" - Options: "Yes, it's aliased as..." (let them provide the alias), "No, I need to install it"
- If they provide an alias, verify it with
<alias> _fingerprint 2>/dev/nulland setSLACK_CMD=<alias>. - If they need to install it, run:
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.
- 2d ago First seen · 250 lines · 83 tokens per session scan C 1d4626f76fbb
slack-cli is a skill published in the GitHub repository slackapi/slack-skills-plugin (113 stars, last pushed today), licensed MIT. It adds 83 tokens to every session and 2,629 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it C with 2 findings (downloads and executes remote code, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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