mcp-certificate-monitor: Skill for Claude Code

.claude/skills/openspec-onboard/SKILL.md

openspec-onboard is a skill for Claude Code from natesilva/mcp-certificate-monitor. It costs 26 tokens per session (3,379 once invoked), scanned A, a copy of openspec-onboard, MIT.

A guided OpenSpec onboarding workflow, where OpenSpec is a tool for planning and implementing software changes through proposals, specifications, designs, and tasks.

In plain words
What is it for?
It is for checking the OpenSpec command-line tool, choosing a task, creating its planning documents, implementing the work, and archiving the completed change.
Why use it?
It teaches the complete workflow while applying it to a real, small change in the codebase.

Skill for Claude Code

Written for Claude Code: installed under .claude/.

This is natesilva/mcp-certificate-monitor's own configuration. It tells Claude Code how to work on mcp-certificate-monitor itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything mcp-certificate-monitor configures →

Reuse

Borrowing it

Nothing to install: this file belongs to natesilva/mcp-certificate-monitor. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/natesilva/mcp-certificate-monitor/main/.claude/skills/openspec-onboard/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/natesilva/mcp-certificate-monitor

Made for: Claude Code.

Wrote 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.

agentmods badge for openspec-onboard

README.md
[![agentmods](https://agentmods.dev/badge/skills/natesilva/mcp-certificate-monitor/openspec-onboard/github.svg)](https://agentmods.dev/skills/natesilva/mcp-certificate-monitor/openspec-onboard)
Your own site
<a href="https://agentmods.dev/skills/natesilva/mcp-certificate-monitor/openspec-onboard"><img src="https://agentmods.dev/badge/skills/natesilva/mcp-certificate-monitor/openspec-onboard/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.

agentmods 80×15 button for openspec-onboard

Your own site · 80×15
<a href="https://agentmods.dev/skills/natesilva/mcp-certificate-monitor/openspec-onboard"><img src="https://agentmods.dev/badge/skills/natesilva/mcp-certificate-monitor/openspec-onboard.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 26 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,379 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin 80% copy Near-identical to another mod 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 5.1 $0.00026 $0.03379
Opus 5 $0.00013 $0.01690
Sonnet 5 $0.00005 $0.00676
Haiku 4.5 $0.00003 $0.00338

Measured 11d ago against content hash 5a87aac27a53, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

openspec-onboard 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 11d 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.

Origin

This is a copy

80% identical to openspec-onboard — 76 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

.claude/skills/openspec-onboard/SKILL.md · 553 lines

How it starts

The opening of the file, as written. The whole thing — 553 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Guide the user through their first complete OpenSpec workflow cycle. This is a teaching experience—you'll do real work in their codebase while explaining each step.


Preflight

Before starting, check if the OpenSpec CLI is installed:

# Unix/macOS
openspec --version 2>&1 || echo "CLI_NOT_INSTALLED"
# Windows (PowerShell)
# if (Get-Command openspec -ErrorAction SilentlyContinue) { openspec --version } else { echo "CLI_NOT_INSTALLED" }

If CLI not installed:

OpenSpec CLI is not installed. Install it first, then come back to /opsx:onboard.

Stop here if not installed.


Phase 1: Welcome

Display:

## Welcome to OpenSpec!

I'll walk you through a complete change cycle—from idea to implementation—using a real task in your codebase. Along the way, you'll learn the workflow by doing it.

**What we'll do:**
1. Pick a small, real task in your codebase
2. Explore the problem briefly
3. Create a change (the container for our work)
4. Build the artifacts: proposal → specs → design → tasks
5. Implement the tasks
6. Archive the completed change

**Time:** ~15-20 minutes

Let's start by finding something to work on.

Phase 2: Task Selection

Codebase Analysis

Scan the codebase for small improvement opportunities. Look for:

  1. TODO/FIXME comments - Search for TODO, FIXME, HACK, XXX in code files
  2. Missing error handling - catch blocks that swallow errors, risky operations without try-catch
  3. Functions without tests - Cross-reference src/ with test directories
  4. Type issues - any types in TypeScript files (: any, as any)
  5. Debug artifacts - console.log, console.debug, debugger statements in non-debug code
  6. Missing validation - User input handlers without validation

Also check recent git activity:

# Unix/macOS
git log --oneline -10 2>/dev/null || echo "No git history"
# Windows (PowerShell)
# git log --oneline -10 2>$null; if ($LASTEXITCODE -ne 0) { echo "No git history" }

Read the full file on GitHub · 553 lines

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. 11d ago First seen · 553 lines · 26 tokens per session scan A 5a87aac27a53

Subscribe to this mod's changes

openspec-onboard is a skill published in the GitHub repository natesilva/mcp-certificate-monitor (0 stars, last pushed 2mo ago), licensed MIT. It adds 26 tokens to every session and 3,379 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. It is 80% identical to openspec-onboard, differing in 76 lines, and is treated as a copy.

Related

Other skills, from other repositories

fastmcp-client-cli

Query and invoke tools on MCP servers using fastmcp list and fastmcp call. Use when you need to discover what tools a server offers, call tools, or integrate MCP servers into workflows.

PrefectHQ/fastmcp · 46 tokens

swag

This skill should be used when the user says "add proxy config", "create reverse proxy", "SWAG config", "nginx proxy", "expose service", "proxy configuration", "subdomain config", "subfolder config", "configure SWAG", "list proxy configs", "view proxy config", "edit proxy config", "remove proxy config", "check proxy…

jmagar/swag-mcp · 118 tokens

security-audit

Use when auditing a web app for security vulnerabilities. Triggers on: 'audit my project', 'how could this get hacked', 'find bugs in this codebase', 'security review', 'pentest', 'bug bounty scope for X', 'GHSA collaborator invite', 'security audit this'. Handles both internal audits (sitting in your own codebase…

msradam/theodosia · 250 tokens

MCP Server Builder

Step-by-step guidance for creating a new MCP server with FastMCP or the TypeScript SDK — tool definitions, resource handlers, error responses, and usage examples.

Notysoty/openagentskills · 38 tokens

plane-workflow

Inspect, create, relate, update, audit, standardize, and organize Plane work items with the Plane Workflow MCP tools. Use for project briefings, filtered work queries, dependencies, task lifecycles, modules, and backlog improvements.

amirhosseinkz/plane-workflow-mcp · 52 tokens

cor-api-tools

Deep reference for all 61 COR MCP API tools — complete argument listings, JSON request/response examples, and common usage patterns for every module.

fxckcode/mcp-cor · 33 tokens