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Spring Boot Configuration Properties Expert

A Spring Boot 3 skill for building type-safe @ConfigurationProperties groups with validation, profile overrides and safe secret injection.

Dev & CodingIntermediate★ 304⑂ 46AI score 9/10Last updated: Sep 21, 2026

What it does

  • Groups related settings into a typed @ConfigurationProperties record and makes sure it is actually registered via @EnableConfigurationProperties or @ConfigurationPropertiesScan.
  • Wires validation correctly: @Validated, Jakarta constraints, @Valid for nested objects, plus the spring-boot-starter-validation dependency.
  • Enforces explicit units for durations and sizes, bans unsafe defaults, and fails startup fast when credentials or required endpoints are missing.
  • Prevents secret leakage from record toString, and warns against exposing actuator configprops/env or disabling sanitization for debugging.
  • Prescribes verification with ApplicationContextRunner: valid binding, startup failure on bad config, unit conversion, nested validation and the real env-var override path.

Who it's for

  • Java backend engineers on Spring Boot 3 / Java 17
  • Teams consolidating scattered @Value injections into typed property classes
  • Platform/DevOps engineers injecting config through environment variables or mounted secrets

Example uses

  1. "Group these five HTTP client settings under a client.* prefix record and validate the timeouts" → follows the bundled ClientProperties.java and good-client.yml patterns.
  2. "Write a test proving APP_CLIENT_TIMEOUT really binds in production" → an ApplicationContextRunner override test.
  3. "Review this config that ships a default API token" → removes the default credential, adds fail-fast validation and redaction guidance.

· · · Install guide · · ·

Try it now, no install

Paste this into Claude to use the skill without installing anything.

Read the instructions in this file and follow them to help me:
https://raw.githubusercontent.com/rrezartprebreza/spring-boot-skills/HEAD/skills/spring-boot-3/configuration-properties/SKILL.md

What I want: (describe your task here)

If Claude can't open the link, open it yourself and paste the contents instead.

↓ If it works for you, download the ZIP below and install it. Then it runs on its own — no pasting each time.

Install in the Claude app (no terminal)
  1. Download the ZIP with the button below.
  2. In Claude, open Settings → Capabilities and turn on 'Code execution and file creation'. (one time)
  3. Go to Customize → Skills → + → 'Upload a skill' and upload the ZIP.
↓ Download ZIP
Install in Claude Code

Let Claude do it — paste this into Claude Code

Install the skill I found on Claude Skill Mart.
Copy the skills/spring-boot-3/configuration-properties folder from the GitHub repo rrezartprebreza/spring-boot-skills into my ~/.claude/skills/configuration-properties/.
When it's done, tell me in one line what this skill can do.

Install with a command instead

git clone https://github.com/rrezartprebreza/spring-boot-skills.git /tmp/spring-boot-skills && mkdir -p ~/.claude/skills && cp -r /tmp/spring-boot-skills/skills/spring-boot-3/configuration-properties ~/.claude/skills/

⚠ This is a third-party skill. Check the source repository before installing.

  1. Open a terminal and clone the repository: git clone https://github.com/rrezartprebreza/spring-boot-skills.git
  2. Create your skills directory if needed: mkdir -p ~/.claude/skills
  3. Copy just this skill: cp -r spring-boot-skills/skills/spring-boot-3/configuration-properties ~/.claude/skills/
  4. Verify with ls ~/.claude/skills/configuration-properties — you should see SKILL.md and the examples/ folder.
  5. Restart Claude Code, then in a Spring Boot project ask something like "refactor these properties into a validated @ConfigurationProperties record" to trigger the skill.
View source on GitHub ↗License: MIT