Getting it into your agent
This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.
/plugin marketplace add jeremylongshore/claude-code-slack-channel/plugin install slack-channelWrote 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.
[](https://agentmods.dev/skills/jeremylongshore/claude-code-slack-channel/install)<a href="https://agentmods.dev/skills/jeremylongshore/claude-code-slack-channel/install"><img src="https://agentmods.dev/badge/skills/jeremylongshore/claude-code-slack-channel/install/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/jeremylongshore/claude-code-slack-channel/install"><img src="https://agentmods.dev/badge/skills/jeremylongshore/claude-code-slack-channel/install.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00094 | $0.06092 |
| Opus 5 | $0.00047 | $0.03046 |
| Sonnet 5 | $0.00019 | $0.01218 |
| Haiku 4.5 | $0.00009 | $0.00609 |
Grade D, and why
install scanned grade D with 4 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 9d 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.
Asks the agent to reveal its instructionsmediumSystem prompt leakage
Directions to print, repeat or translate the system prompt extract configuration the operator did not intend to expose.
- Print instructions for revoking the Slack app Asks for rootmediumPrivilege escalation
A mod that escalates privileges can change anything on the machine, not only the project.
command -v curl >/dev/null && command -v jq >/dev/null || echo "Install jq: brew install jq (macOS) | sudo apt install jq (Debian/Ubuntu)" Recursive force deletehighDestructive command
rm -rf with a variable or a broad path is one typo away from removing the wrong tree.
- Move `sessions/` to `sessions.reset.<timestamp>/` (archive, never `rm -rf` — keep one rollback path per the skill's safety invariants) Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
compatibility: Requires Claude Code >= v2.1.80 with a claude.ai login (Channels research preview rejects API-key-only auth), Bun >= 1.0 (Node.js fallback supported), and a Slack workspace where you can create apps. Docto How it starts
The opening of the file, as written. The whole thing — 504 lines — stays where its author put it; the contents beside it link to each section on GitHub.
/slack-channel:install
Overview
CCSC lifecycle command center. One skill, eight modes — fresh install through teardown. No subcommand defaults to the full install walkthrough.
/slack-channel:install [mode]
Modes:
install full fresh-clone walkthrough (default) ← new user starts here
doctor run a health check against an existing install
verify run the verification round-trip only
repair auto-fix common issues surfaced by doctor
manifest export a Slack app manifest.json (one-click import — saves 10 min of scope clicking)
reset wipe state and restart from Step 3 (keeps Slack app)
tour explain CCSC features without installing (for evaluators)
uninstall clean teardown — remove state dir, optionally guide Slack app deletion
This skill orchestrates. It delegates token configuration to
/slack-channel:configure and pairing to /slack-channel:access pair —
do not re-implement those.
Prerequisites
Three prerequisites gate a fresh install; install mode checks them as Step 0
and doctor re-checks them on demand. See
references/prerequisites.md for the exact
commands and recovery paths.
- Bun ≥ 1.0 —
bun --version. Node.js fallback is fine (see the prerequisites doc). - Claude Code ≥ v2.1.80 —
claude --version. Older versions cannot load Channels. claude.ailogin (NOT API-key-only) — Channels is Research Preview and rejects pure API-key auth.
Doctor mode additionally shells out to curl and jq (see "Doctor
dependencies" below), and every mode past Step 1 assumes a Slack workspace
where you can create an app.
Instructions
- Parse the first word of
$ARGUMENTS. - If empty or
install, run the install mode. - Otherwise dispatch to the matching mode described in the sections below —
each
Mode:section is the complete procedure for that mode. - Unknown modes: show the help block above and exit.
Mode: install (default)
What ships with it
3 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.
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.
- 9d ago First seen · 504 lines · 94 tokens per session scan D 6768ed54b3e6
install is a skill published in the GitHub repository jeremylongshore/claude-code-slack-channel (39 stars, last pushed yesterday), licensed Apache-2.0. It adds 94 tokens to every session and 6,092 once invoked, about $0.0005 per session on Opus 5. A static security scan graded it D with 4 findings (asks the agent to reveal its instructions, asks for root, recursive force delete). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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bot-state
Show where this bot's memory actually lives — state root, summaries, attachments, outbox, buffer, sessions — and what is in each. Use when asked where files go, why a summary or attachment is missing, or to check the bot's storage layout.
c-apps
Install, update, and search Mac App Store apps from the command line using mas.
cloud-backup
A guide to backing up files to cloud object storage such as Amazon S3 or Alibaba OSS, including copying, restoring, encryption, storage classes, and retention rules.
forge-cli
A command-line management tool for Forge Hub, a service that connects agent instances to chat channels and routes messages between them.
subagent-driven-development
Execute plans via delegatetask subagents (2-stage review).