What is health-check-endpoints?

A set of patterns for designing how people interact with an interface. It covers actions such as tapping, swiping, dragging, loading, errors, and visual feedback.

Use it to define user flows, animations, transitions, loading states, error states, and small interface responses called microinteractions. It includes patterns for mobile interactions such as swipe and pinch-to-zoom.

It helps users understand what the interface is doing and what happened after an action. It also helps make interactions more predictable and usable.

health-check-endpoints — Skill for Claude Code and Codex by aj-geddes

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 aj-geddes/useful-ai-prompts --skill health-check-endpoints

Clone the repo

git clone --depth 1 https://github.com/aj-geddes/useful-ai-prompts

Made for: Claude Code, Codex.

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/aj-geddes/useful-ai-prompts/health-check-endpoints/github.svg)](https://agentmods.dev/skills/aj-geddes/useful-ai-prompts/health-check-endpoints)

Your own site

<a href="https://agentmods.dev/skills/aj-geddes/useful-ai-prompts/health-check-endpoints"><img src="https://agentmods.dev/badge/skills/aj-geddes/useful-ai-prompts/health-check-endpoints/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/aj-geddes/useful-ai-prompts/health-check-endpoints"><img src="https://agentmods.dev/badge/skills/aj-geddes/useful-ai-prompts/health-check-endpoints.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 38 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 564 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. Third-party audits

Socket pass 16 Sept 2026
Snyk pass 16 Sept 2026

How audits are shown

Origin original 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.

Model	Per session	Once invoked
Fable 5.1	$0.00038	$0.00564
Opus 5.5	$0.00015	$0.00226
Sonnet 5.5	$0.00008	$0.00113
Haiku 4.5	$0.00004	$0.00056

Measured 2mo ago against content hash f5f48eae0505, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

health-check-endpoints 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.

The scan reads SKILL.md. This mod also ships 1 executable file (scripts/validate-config.sh), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

skills/health-check-endpoints/SKILL.md · 98 lines

How it starts

The opening of the file, as written. The whole thing — 98 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Overview

Implement health check endpoints to monitor service health, dependencies, and readiness for traffic.

When to Use

Kubernetes liveness and readiness probes
Load balancer health checks
Service discovery and registration
Monitoring and alerting systems
Circuit breaker decisions
Auto-scaling triggers
Deployment verification

Quick Start

Minimal working example:

import express from "express";
import { Pool } from "pg";
import Redis from "ioredis";

interface HealthStatus {
  status: "healthy" | "degraded" | "unhealthy";
  timestamp: string;
  uptime: number;
  checks: Record<string, CheckResult>;
  version?: string;
  environment?: string;
}

interface CheckResult {
  status: "pass" | "fail" | "warn";
  time: number;
  output?: string;
  error?: string;
}

class HealthCheckService {
  private startTime = Date.now();
  private version = process.env.APP_VERSION || "1.0.0";
  private environment = process.env.NODE_ENV || "development";

// ... (see reference guides for full implementation)

Reference Guides

Detailed implementations in the references/ directory:

Guide	Contents
Express.js Health Checks	Express.js Health Checks
Spring Boot Actuator-Style (Java)	Spring Boot Actuator-Style (Java)
Python Flask Health Checks	Python Flask Health Checks

Best Practices

✅ DO

Implement separate liveness and readiness probes
Keep liveness probes lightweight
Check critical dependencies in readiness
Return appropriate HTTP status codes
Include response time metrics
Set reasonable timeouts
Cache health check results briefly
Include version and environment info
Monitor health check failures

Read the full file on GitHub · 98 lines

Files

What ships with it

5 files 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.

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.

2mo ago First seen · 98 lines · 38 tokens per session scan A f5f48eae0505

Subscribe to this mod's changes

health-check-endpoints is a skill published in the GitHub repository aj-geddes/useful-ai-prompts (376 stars, last pushed 8mo ago), licensed MIT. It adds 38 tokens to every session and 564 once invoked, about $0.0002 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 2026-09-03.

CSS and styling Design and UX Frontend

health-check-endpoints next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
health-check-endpointsaj-geddes/useful-ai-prompts	Skill	376	8mo ago	MIT	A	38	Claude Code, Codex
anti-slop-designsickn33/agentic-awesome-skills	Skill	49k	yesterday	MIT	A	34	Claude Code
chakra-ui-builderchakra-ui/chakra-ui	Skill	41k	yesterday	MIT	A	214	Claude Code, Codex
visual-ralphYeachan-Heo/oh-my-codex	Skill	34k	3d ago	MIT	A	52	Codex
open-design-setupcompozy/compozy	Skill	2.8k	yesterday	MIT	A	67	Claude Code, Codex
frontend-visual-qadaymade/claude-code-skills	Skill	1.5k	yesterday	MIT	A	125	Claude Code, Codex
prototype-webnexu-io/html-anything	Skill	9.4k	25d ago	Apache-2.0	A	24	Claude Code, Codex

health-check-endpoints