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 personamanagmentlayer/pcl --skill slack-expertgit clone --depth 1 https://github.com/personamanagmentlayer/pclWrote 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/personamanagmentlayer/pcl/slack-expert)<a href="https://agentmods.dev/skills/personamanagmentlayer/pcl/slack-expert"><img src="https://agentmods.dev/badge/skills/personamanagmentlayer/pcl/slack-expert/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/personamanagmentlayer/pcl/slack-expert"><img src="https://agentmods.dev/badge/skills/personamanagmentlayer/pcl/slack-expert.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 7 findings, up to medium
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- medium Data Exfiltration · line 144 Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.Fix: Verify the destination URL is trusted and necessary. Remove or replace with documented APIs. Ensure no secrets, tokens, or PII are transmitted.
- medium Data Exfiltration · line 146 Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.Fix: Verify the destination URL is trusted and necessary. Remove or replace with documented APIs. Ensure no secrets, tokens, or PII are transmitted.
- medium Data Exfiltration · line 147 Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.Fix: Verify the destination URL is trusted and necessary. Remove or replace with documented APIs. Ensure no secrets, tokens, or PII are transmitted.
- medium Data Exfiltration · line 151 Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.Fix: Verify the destination URL is trusted and necessary. Remove or replace with documented APIs. Ensure no secrets, tokens, or PII are transmitted.
- medium Data Exfiltration · line 153 Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.Fix: Verify the destination URL is trusted and necessary. Remove or replace with documented APIs. Ensure no secrets, tokens, or PII are transmitted.
- medium Data Exfiltration · line 158 Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.Fix: Verify the destination URL is trusted and necessary. Remove or replace with documented APIs. Ensure no secrets, tokens, or PII are transmitted.
- medium Data Exfiltration · line 165 Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.Fix: Verify the destination URL is trusted and necessary. Remove or replace with documented APIs. Ensure no secrets, tokens, or PII are transmitted.
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 | $0.00069 | $0.01060 |
| Opus 5.5 | $0.00028 | $0.00424 |
| Sonnet 5.5 | $0.00014 | $0.00212 |
| Haiku 4.5 | $0.00007 | $0.00106 |
Grade A, and why
slack-expert 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 2mo 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.
How it starts
The opening of the file, as written. The whole thing — 169 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Slack Expert
Core Concepts
Slack Platform
- Bolt Framework - Official Slack app framework
- Web API - HTTP-based API methods
- Events API - Real-time event subscriptions
- Socket Mode - WebSocket-based connectivity
- OAuth - App installation and permissions
- App Distribution - App Directory publishing
Key Features
- Slash Commands - Custom commands (/command)
- Interactive Components - Buttons, menus, modals
- Block Kit - Rich message formatting
- Workflows - No-code automation
- App Home - Custom app interface
- Shortcuts - Quick actions
Development Tools
- Bolt for JavaScript - Node.js framework
- Bolt for Python - Python framework
- Block Kit Builder - Visual UI designer
- Slack CLI - Command-line tools
- Manifest - App configuration
- Webhooks - Incoming webhooks
Best Practices
Bot Design
- Use clear, concise commands
- Provide helpful error messages
- Implement command validation
- Use threading for conversations
- Respect rate limits
- Handle errors gracefully
UI/UX
- Use Block Kit for rich formatting
- Provide interactive components
- Keep modals simple and focused
- Use consistent styling
- Provide feedback for actions
- Make messages scannable
Security
- Validate signing secrets
- Use OAuth for installations
- Request minimal scopes
- Store tokens securely
- Implement rate limiting
- Sanitize user input
Performance
- Use async/await properly
- Batch API calls when possible
- Cache frequently accessed data
- Use Socket Mode for real-time
- Monitor API usage
- Implement retry logic
Anti-Patterns
Common Mistakes
- Not acknowledging interactions quickly
- Overly complex modal forms
- Spamming channels with messages
- Missing error handling
- Hard-coding channel IDs
- Ignoring rate limits
Design Issues
- Too many slash commands
- Unclear command syntax
- No help documentation
- Poor button labels
- Inconsistent responses
- Missing user feedback
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.
- 2mo ago First seen · 169 lines · 69 tokens per session scan A a2083c385f79
slack-expert is a skill published in the GitHub repository personamanagmentlayer/pcl (44 stars, last pushed 14d ago), licensed Apache-2.0. It adds 69 tokens to every session and 1,060 once invoked, about $0.0003 per session on Opus 5.5. 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 2026-09-05.
slack-expert compared with skills from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| slack-expertpersonamanagmentlayer/pcl | Skill | 44 | 14d ago | Apache-2.0 | A | 69 | Claude Code |
| slack-skillkubiyabot/skill | Skill | 19 | 9mo ago | Apache-2.0 | A | 23 | Claude Code |
| slackclishaharia-lab/slackcli | Skill | 270 | today | MIT | A | 48 | Claude Code |
| slack-toolxuiltul/animaworks | Skill | 268 | today | Apache-2.0 | A | 60 | Claude Code, Codex |
| a0-developmentagent0ai/agent-zero | Skill | 20k | yesterday | none | A | 24 | Claude Code, Codex |
| composioaAAaqwq/AGI-Super-Team | Skill | 116 | 4d ago | MIT | A | 26 | Claude Code |
| api-data-fetcherbrycewang-stanford/Auto-Empirical-Research-Skills | Skill | 5.0k | today | none | A | 18 | Claude Code, Codex |