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 skills add pbc-os/smb-starter-kit --skill slackgit clone --depth 1 https://github.com/pbc-os/smb-starter-kitWrote 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/pbc-os/smb-starter-kit/slack)<a href="https://agentmods.dev/skills/pbc-os/smb-starter-kit/slack"><img src="https://agentmods.dev/badge/skills/pbc-os/smb-starter-kit/slack/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/pbc-os/smb-starter-kit/slack"><img src="https://agentmods.dev/badge/skills/pbc-os/smb-starter-kit/slack.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 | $0.00040 | $0.03088 |
| Opus 5 | $0.00020 | $0.01544 |
| Sonnet 5 | $0.00008 | $0.00618 |
| Haiku 4.5 | $0.00004 | $0.00309 |
Grade A, and why
slack scanned grade A with 1 finding 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 8d 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.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
bins: ["curl", "jq"] How it starts
The opening of the file, as written. The whole thing — 377 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Slack
Team messaging built for how small businesses actually communicate.
For user lookups and directory management, see the slack-directory skill. This skill covers everything else: sending messages, managing channels, posting automated updates, and organizing your team's communication.
Triggers
- "send a slack message"
- "post to #channel"
- "message the team"
- "set up slack channels"
- "slack standup"
- "post an update to slack"
- Any request involving Slack messaging, channels, or team communication
Prerequisites
- Slack Bot Token with appropriate scopes (see Setup below)
- jq installed for JSON parsing
slack-directoryskill for user lookupssecrets-managerskill for secure token storage
Setup
Required Bot Token Scopes
| Scope | What It Enables |
|---|---|
chat:write |
Send messages to channels and DMs |
channels:read |
List and get info about public channels |
channels:manage |
Create and archive public channels |
groups:read |
List private channels the bot is in |
im:write |
Send direct messages |
users:read |
Look up users (for slack-directory) |
files:write |
Upload files to channels |
reactions:write |
Add emoji reactions |
Getting Your Bot Token
- Go to api.slack.com/apps
- Create a new app (or use existing)
- Go to OAuth & Permissions → add the scopes above
- Install to your workspace
- Copy the Bot User OAuth Token (
xoxb-...) - Store securely:
# GCP Secret Manager (recommended) echo -n "xoxb-your-token" | gcloud secrets create slack-bot-token --data-file=- # Or set as environment variable export SLACK_BOT_TOKEN="xoxb-your-token"
Retrieving Your Token
# From GCP Secret Manager
TOKEN=$(gcloud secrets versions access latest --secret="slack-bot-token")
# From environment
TOKEN="$SLACK_BOT_TOKEN"
Every message and channel change is visible to your team and hard to fully unsend. Before the agent posts a message, sends a DM, creates or archives a channel, or uploads a file, show the user the exact text and target and get explicit approval — unless they've pre-approved a specific recurring automation (e.g. a daily briefing to a named channel), in which case state that standing approval the first time and stay within its scope.
What ships with it
1 file 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.
- 8d ago First seen · 377 lines · 40 tokens per session scan A 0ae3b4ff74a6
slack is a skill published in the GitHub repository pbc-os/smb-starter-kit (10 stars, last pushed 3mo ago), licensed MIT. It adds 40 tokens to every session and 3,088 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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