convex

convex is a skill for Claude Code from sinhoneyy/master-skills. It costs 30 tokens per session (5,993 once invoked), scanned B, original, no licence file.

A backend development guide for Convex, a platform for databases and server functions. It covers schemas, TypeScript functions, live data updates, authentication, file storage, scheduling, and deployment.

In plain words
What is it for?
It is for designing Convex schemas, writing backend functions, adding real-time subscriptions and authentication, storing files, scheduling work, and deploying apps.
Why use it?
It helps developers structure and connect the main backend parts of a Convex application.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the master-skills-ai-agent-builder plugin — 195 skills, 1 plugin shipped together

Good fit It is for designing Convex schemas, writing backend functions, adding real-time subscriptions and authentication, storing files, scheduling work, and deploying apps.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/sinhoneyy/master-skills/convex
Install

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.

Any agent
npx skills add sinhoneyy/master-skills --skill convex
Clone the repo
git clone --depth 1 https://github.com/sinhoneyy/master-skills

Made for: Claude Code.

Or install master-skills-ai-agent-builder, the plugin that ships this one along with the rest of its 195 skills, 1 plugin.

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 convex

README.md
[![agentmods](https://agentmods.dev/badge/skills/sinhoneyy/master-skills/convex/github.svg)](https://agentmods.dev/skills/sinhoneyy/master-skills/convex)
Your own site
<a href="https://agentmods.dev/skills/sinhoneyy/master-skills/convex"><img src="https://agentmods.dev/badge/skills/sinhoneyy/master-skills/convex/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 convex

Your own site · 80×15
<a href="https://agentmods.dev/skills/sinhoneyy/master-skills/convex"><img src="https://agentmods.dev/badge/skills/sinhoneyy/master-skills/convex.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 30 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 5,993 The whole file, excluding the scripts and references it only reads on demand.
Security scan B 1 finding. A grade says what 26 rules found in the file — not that it is safe.
Origin unknown No closer match found 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 $0.00030 $0.05993
Opus 5 $0.00015 $0.02996
Sonnet 5 $0.00006 $0.01199
Haiku 4.5 $0.00003 $0.00599

Measured 8d ago against content hash f4753292d580, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade B, and why

convex scanned grade B 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.

Sends data to an external URLmediumData exfiltration

A POST to an outside endpoint may be telemetry or may be exfiltration; either way the mod talks to somewhere, and you should know where.

const response = await fetch("https://api.sendgrid.com/v3/mail/send", { method: "POST",
plugins/master-skills-ai-agent-builder/skills/convex/SKILL.md · 798 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

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. 8d ago First seen · 798 lines · 30 tokens per session scan B f4753292d580

Subscribe to this mod's changes

convex is a skill published in the GitHub repository sinhoneyy/master-skills (12 stars, last pushed 6d ago), with no licence file. It adds 30 tokens to every session and 5,993 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it B with 1 finding (sends data to an external url). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.