ln-774-healthcheck-setup

Q: How do I install ln-774-healthcheck-setup?

Run npx skills add https://github.com/levnikolaevich/claude-code-skills --skill ln-774-healthcheck-setup in your project. The skills CLI detects the agents you use and copies the skill into the right folder. For Claude Code you can also place the skill folder at ~/.claude/skills/ln-774-healthcheck-setup/ (personal) or .claude/skills/ln-774-healthcheck-setup/ (project).

by levnikolaevichDevOps & Cloud

Configures health check endpoints for Kubernetes readiness/liveness/startup probes. Use when deploying to Kubernetes.

Installs: 385
Last 24h: —
Trending rank: —
Security: Not audited

Install

Works with every agent the skills CLI supports.

npx skills add https://github.com/levnikolaevich/claude-code-skills --skill ln-774-healthcheck-setup

01
Install
Run the command in your project. The CLI asks which agents to install for.
02
Describe the task
Ask your agent for something this skill covers. It loads ln-774-healthcheck-setup automatically when relevant.
03
Review the result
The agent follows the SKILL.md steps, scripts and references bundled with the skill.

SKILL.md

The instructions your agent reads when the skill is triggered.

ln-774-healthcheck-setup

Type: L3 Worker Category: 7XX Project Bootstrap

Configures health check endpoints for Kubernetes probes and monitoring.

Overview

Aspect	Details
Input	Context Store from ln-770
Output	Health check endpoints and Kubernetes probe configuration
Stacks	.NET (AspNetCore.Diagnostics.HealthChecks), Python (FastAPI routes)

Phase 1: Receive Context + Identify Dependencies

Accept Context Store and scan for dependencies to monitor.

Required Context:

STACK: .NET or Python
PROJECT_ROOT: Project directory path

Idempotency Check:

.NET: Grep for AddHealthChecks or MapHealthChecks
Python: Grep for /health route
If found: Return { "status": "skipped" }

Dependency Detection:

Dependency	.NET Detection	Python Detection
PostgreSQL	`Npgsql` in csproj	`psycopg2` or `asyncpg` in requirements
MySQL	`MySql.Data` in csproj	`mysql-connector-python` in requirements
Redis	`StackExchange.Redis` in csproj	`redis` in requirements
RabbitMQ	`RabbitMQ.Client` in csproj	`pika` or `aio-pika` in requirements
MongoDB	`MongoDB.Driver` in csproj	`pymongo` in requirements

Phase 2: Design Health Check Strategy

Define three types of health endpoints per Kubernetes best practices.

Endpoint Types

Endpoint	Probe Type	Purpose	Checks
`/health/live`	Liveness	Is app alive?	App responds (no dependency checks)
`/health/ready`	Readiness	Can app serve traffic?	All dependencies healthy
`/health/startup`	Startup (K8s 1.16+)	Is app initialized?	Initial warmup complete

When Each Probe Fails

Probe	Failure Action	Kubernetes Behavior
Liveness	Container restart	kubelet restarts container
Readiness	Remove from service	Traffic stopped, no restart
Startup	Delay other probes	Liveness/Readiness paused

Phase 3: Research Health Check Patterns

Use MCP tools for current documentation.

For .NET:

MCP ref: "ASP.NET Core health checks Kubernetes probes"
Context7: /dotnet/aspnetcore

For Python:

MCP ref: "FastAPI health check endpoint Kubernetes"
Context7: /tiangolo/fastapi

Key Patterns to Research:

Database health checks (connection pool)
Redis connectivity check
Custom health check implementation
Health check response writer customization

Phase 4: Configure Kubernetes Probes

Determine probe timing based on application characteristics.

Probe Configuration

Parameter	Liveness	Readiness	Startup
`initialDelaySeconds`	10	5	0
`periodSeconds`	10	5	5
`timeoutSeconds`	5	3	3
`failureThreshold`	3	3	30
`successThreshold`	1	1	1

Startup Probe Calculation:

Max startup time = initialDelaySeconds + (periodSeconds × failureThreshold)
Default: 0 + (5 × 30) = 150 seconds

Phase 5: Generate Implementation

.NET Output Files

File	Purpose
`Extensions/HealthCheckExtensions.cs`	Health check registration
`HealthChecks/StartupHealthCheck.cs`	Custom startup check

Generation Process:

Use MCP ref for current ASP.NET Core health checks API
Generate HealthCheckExtensions with:
- AddHealthChecks registration
- Database health check (if detected)
- Redis health check (if detected)
- Custom StartupHealthCheck
Configure three endpoints with proper tags

Packages to Add:

AspNetCore.HealthChecks.NpgSql (if PostgreSQL)
AspNetCore.HealthChecks.Redis (if Redis)
AspNetCore.HealthChecks.MySql (if MySQL)

Registration Code:

builder.Services.AddHealthCheckServices(builder.Configuration);
// ...
app.MapHealthCheckEndpoints();

Python Output Files

File	Purpose
`routes/health.py`	Health check router
`services/health_checker.py`	Dependency health checks

Generation Process:

Use MCP ref for FastAPI health patterns
Generate health router with:
- /health/live endpoint (simple)
- /health/ready endpoint (with dependency checks)
- /health/startup endpoint
Generate health_checker service for dependency verification

Registration Code:

from routes.health import health_router
app.include_router(health_router)

Kubernetes Manifest Snippet

Generate for inclusion in deployment.yaml:

livenessProbe:
  httpGet:
    path: /health/live
    port: 5000
  initialDelaySeconds: 10
  periodSeconds: 10
  timeoutSeconds: 5
  failureThreshold: 3

readinessProbe:
  httpGet:
    path: /health/ready
    port: 5000
  initialDelaySeconds: 5
  periodSeconds: 5
  timeoutSeconds: 3
  failureThreshold: 3

startupProbe:
  httpGet:
    path: /health/startup
    port: 5000
  periodSeconds: 5
  failureThreshold: 30

Phase 6: Validate

Validation Steps:

Syntax check:
- .NET: dotnet build --no-restore
- Python: python -m py_compile routes/health.py

Endpoint test:

curl http://localhost:5000/health/live
curl http://localhost:5000/health/ready
curl http://localhost:5000/health/startup

Verify response format:

{
  "status": "Healthy",
  "checks": {
    "database": { "status": "Healthy", "duration": "00:00:00.0234" },
    "redis": { "status": "Healthy", "duration": "00:00:00.0012" }
  },
  "totalDuration": "00:00:00.0250"
}

Dependency failure test:
- Stop database
- Verify /health/ready returns 503
- Verify /health/live still returns 200

Return to Coordinator

{
  "status": "success",
  "files_created": [
    "Extensions/HealthCheckExtensions.cs",
    "HealthChecks/StartupHealthCheck.cs"
  ],
  "packages_added": [
    "AspNetCore.HealthChecks.NpgSql"
  ],
  "registration_code": "builder.Services.AddHealthCheckServices(configuration);",
  "message": "Configured health checks with liveness, readiness, and startup probes"
}

Reference Links

Critical Rules

Three separate endpoints — /health/live, /health/ready, /health/startup per Kubernetes best practices
Liveness must not check dependencies — only confirms app is alive (avoids cascade restarts)
Readiness checks all dependencies — DB, Redis, RabbitMQ connectivity verified
Auto-detect dependencies from project files — scan csproj/requirements for known packages
Idempotent — if AddHealthChecks/MapHealthChecks or /health route exists, return status: "skipped"

Definition of Done

Context Store received (stack, project root)
Dependencies detected (PostgreSQL, MySQL, Redis, RabbitMQ, MongoDB)
Health check endpoints generated (live, ready, startup) for detected stack
Kubernetes probe manifest snippet generated with proper timing parameters
Syntax validated (dotnet build or py_compile)
Structured JSON response returned to ln-770 coordinator

Version: 2.0.0 Last Updated: 2026-01-10

FAQ

What does the ln-774-healthcheck-setup skill do?

Configures health check endpoints for Kubernetes readiness/liveness/startup probes. Use when deploying to Kubernetes.

How do I install ln-774-healthcheck-setup?

Run npx skills add https://github.com/levnikolaevich/claude-code-skills --skill ln-774-healthcheck-setup in your project. The skills CLI detects the agents you use and copies the skill into the right folder. For Claude Code you can also place the skill folder at ~/.claude/skills/ln-774-healthcheck-setup/ (personal) or .claude/skills/ln-774-healthcheck-setup/ (project).

Which AI agents can use ln-774-healthcheck-setup?

Any agent that supports the open Agent Skills format (a folder with a SKILL.md file), including Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, Windsurf, Cline, OpenCode and more.

Is ln-774-healthcheck-setup safe to install?

No partner security audit is available yet. Skills can run commands and scripts, so read the SKILL.md and any bundled files before installing.

Who maintains ln-774-healthcheck-setup?

It is published by levnikolaevich in levnikolaevich/claude-code-skills. It has 385 recorded installs.

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ln-774-healthcheck-setup

Install

Install

Describe the task

Review the result

SKILL.md

ln-774-healthcheck-setup

Overview

Phase 1: Receive Context + Identify Dependencies

Phase 2: Design Health Check Strategy

Endpoint Types

When Each Probe Fails

Phase 3: Research Health Check Patterns

Phase 4: Configure Kubernetes Probes

Probe Configuration

Phase 5: Generate Implementation

.NET Output Files

Python Output Files

Kubernetes Manifest Snippet

Phase 6: Validate

Return to Coordinator

Reference Links

Critical Rules

Definition of Done

FAQ

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