convexskills MCP — Use Cases, Install & Live Demo

Why use it

Key features

12 Convex-specific skills with real code examples
Covers functions (query/mutation/action/HTTP), schema, realtime, cron, file storage, agents
Two security skills: convex-security-check and convex-security-audit
Migration patterns for schema evolution
convex-component-authoring for reusable components

Live Demo

What it looks like in practice

convexskills-skill.replay ▶ ready

0/0

Install

Pick your client

~/Library/Application Support/Claude/claude_desktop_config.json · Windows: %APPDATA%\Claude\claude_desktop_config.json

{
  "mcpServers": {
    "convexskills-skill": {
      "command": "git",
      "args": [
        "clone",
        "https://github.com/waynesutton/convexskills",
        "~/.claude/skills/convexskills"
      ],
      "_inferred": true
    }
  }
}

Open Claude Desktop → Settings → Developer → Edit Config. Restart after saving.

~/.cursor/mcp.json · .cursor/mcp.json

{
  "mcpServers": {
    "convexskills-skill": {
      "command": "git",
      "args": [
        "clone",
        "https://github.com/waynesutton/convexskills",
        "~/.claude/skills/convexskills"
      ],
      "_inferred": true
    }
  }
}

Cursor uses the same mcpServers schema as Claude Desktop. Project config wins over global.

VS Code → Cline → MCP Servers → Edit

{
  "mcpServers": {
    "convexskills-skill": {
      "command": "git",
      "args": [
        "clone",
        "https://github.com/waynesutton/convexskills",
        "~/.claude/skills/convexskills"
      ],
      "_inferred": true
    }
  }
}

Click the MCP Servers icon in the Cline sidebar, then "Edit Configuration".

~/.codeium/windsurf/mcp_config.json

{
  "mcpServers": {
    "convexskills-skill": {
      "command": "git",
      "args": [
        "clone",
        "https://github.com/waynesutton/convexskills",
        "~/.claude/skills/convexskills"
      ],
      "_inferred": true
    }
  }
}

Same shape as Claude Desktop. Restart Windsurf to pick up changes.

~/.continue/config.json

{
  "mcpServers": [
    {
      "name": "convexskills-skill",
      "command": "git",
      "args": [
        "clone",
        "https://github.com/waynesutton/convexskills",
        "~/.claude/skills/convexskills"
      ]
    }
  ]
}

Continue uses an array of server objects rather than a map.

~/.config/zed/settings.json

{
  "context_servers": {
    "convexskills-skill": {
      "command": {
        "path": "git",
        "args": [
          "clone",
          "https://github.com/waynesutton/convexskills",
          "~/.claude/skills/convexskills"
        ]
      }
    }
  }
}

Add to context_servers. Zed hot-reloads on save.

claude mcp add convexskills-skill -- git clone https://github.com/waynesutton/convexskills ~/.claude/skills/convexskills

One-liner. Verify with claude mcp list. Remove with claude mcp remove.

Use Cases

Real-world ways to use convexskills

Scaffold a new Convex app with realtime + auth + file uploads

👤 Full-stack devs starting a new Convex project ⏱ ~90 min intermediate

When to use: You're starting fresh and want correct Convex patterns from file one.

Prerequisites

Convex CLI — npm create convex

Flow

Design the schema

Use the convex-schema-validator skill. Design tables for users, projects, and files with proper indices.✓ Copied

→ Schema uses v.id(), indices declared, relationships correct
Wire queries and mutations

Use the convex-functions skill. Implement CRUD for projects.✓ Copied

→ Query for reads, mutation for writes, no action misuse
Add realtime + file uploads

Use convex-realtime and convex-file-storage to make projects live-update with file attachments.✓ Copied

→ React subscribes via useQuery, files stored via storage.generateUploadUrl

Outcome: A correctly-structured Convex app you can build on.

Pitfalls

Using actions where mutations suffice — Skill enforces: mutations for DB writes, actions for external I/O

Add a daily cron job that cleans up stale rows

👤 Convex devs adding background maintenance ⏱ ~20 min beginner

When to use: You need a scheduled task without spinning up a worker.

Flow

Use the cron skill

Use convex-cron-jobs. Add a daily job that deletes rows older than 30 days from table sessions.✓ Copied

→ crons.ts entry + internal mutation for the cleanup
Test

Give me a way to trigger this manually for testing.✓ Copied

→ Dev-only HTTP action or CLI recipe

Outcome: A cron running on Convex's managed scheduler.

Pitfalls

Cron runs a query instead of internal mutation — Skill enforces internal mutation for deletes

Audit a Convex app for authorization holes

👤 Devs before a production launch ⏱ ~45 min advanced

When to use: Your app is ready but you haven't pressure-tested auth.

Flow

Run the audit

Use convex-security-audit on this repo. Check every public mutation for proper auth.✓ Copied

→ Per-function auth posture with severity
Fix

Apply the fixes with identity checks and fallback to return null for unauthorized reads.✓ Copied

→ Functions updated with ctx.auth checks

Outcome: Auth tightened before production.

Pitfalls

Relying on 'public=unauthenticated' mental model — Convex public functions are INTERNET-reachable; skill insists on auth checks

Combine with: github

Combinations

Pair with other MCPs for X10 leverage

convexskills-skill + github

Skill designs + implements; GitHub MCP opens the PR

Use convexskills to build the feature, then open a PR with the changes.✓ Copied

convexskills-skill + playwright-skill

Build Convex backend, then Playwright tests the UI end-to-end

Implement the Convex backend, then write a playwright-skill test that hits the UI and verifies realtime updates.✓ Copied

Tools

What this MCP exposes

Tool	Inputs	When to call
convex-functions	function need	Any function work
convex-schema-validator	data model	Designing or changing tables
convex-realtime	UI use case	Adding reactive UI
convex-cron-jobs	scheduled task	Periodic background work
convex-migrations	schema change	Evolving an existing schema
convex-security-audit	repo	Pre-production review

Cost & Limits

What this costs to run

API quota: None for the skill; Convex has its own free + paid tiers
Tokens per call: 2-6k per skill loaded
Monetary: Free — skill is local. Convex has a generous free tier.
Tip: Name the specific skill (e.g. convex-cron-jobs) to avoid loading the full set.

Security

Permissions, secrets, blast radius

Credential storage: No credentials in the skill. Convex deploy keys stay in your .env.

Data egress: None from the skill itself

Convex public functions are Internet-reachable. Always run convex-security-audit before going to production.

Troubleshooting

Common errors and fixes

Claude writes an action when a mutation suffices

Rule of thumb the skill enforces: DB-only → mutation; external I/O → action.

Schema change breaks existing data

Use convex-migrations skill — it plans safe transitions with backfill.

useQuery doesn't update in realtime

Check reactivity: the query must read the data that changed, not a stale index.

Alternatives

convexskills vs others

Alternative	When to use it instead	Tradeoff
Manual Convex docs + examples	You're already an experienced Convex dev	Slower onboarding without the skill
Framework-specific fullstack skills	You're not on Convex	Different stack

More

Resources

📖 Read the official README on GitHub

🐙 Browse open issues

🔍 Browse all 400+ MCP servers and Skills