Use it to define configuration hierarchies, manage secrets, set feature flags, and apply 12-factor app practices.

It keeps development, test, and production settings separate and reduces the risk of exposing credentials or changing configuration inconsistently.

configuration-management — Skill by aj-geddes/useful-ai-prompts

Q: What is configuration-management?

A guide to managing application settings across environments, including environment variables, configuration files, secrets, and feature flags.

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 configuration-management

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/configuration-management/github.svg)](https://agentmods.dev/skills/aj-geddes/useful-ai-prompts/configuration-management)

Your own site

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

Per session 42 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 700 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	$0.00042	$0.00700
Opus 5.5	$0.00017	$0.00280
Sonnet 5.5	$0.00008	$0.00140
Haiku 4.5	$0.00004	$0.00070

Measured 2mo ago against content hash 1fe131c07830, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

configuration-management 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-schema.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/configuration-management/SKILL.md · 106 lines

How it starts

The opening of the file, as written. The whole thing — 106 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Overview

Comprehensive guide to managing application configuration across environments, including environment variables, configuration files, secrets, feature flags, and following 12-factor app methodology.

When to Use

Setting up configuration for different environments
Managing secrets and credentials
Implementing feature flags
Creating configuration hierarchies
Following 12-factor app principles
Migrating configuration to cloud services
Implementing dynamic configuration
Managing multi-tenant configurations

Quick Start

Minimal working example:

# .env.development
NODE_ENV=development
PORT=3000
DATABASE_URL=postgresql://localhost:5432/myapp_dev
REDIS_URL=redis://localhost:6379
LOG_LEVEL=debug
API_KEY=dev-api-key-12345

# .env.production
NODE_ENV=production
PORT=8080
DATABASE_URL=${DATABASE_URL}  # From environment
REDIS_URL=${REDIS_URL}
LOG_LEVEL=info
API_KEY=${API_KEY}  # From secret manager

# .env.test
NODE_ENV=test
DATABASE_URL=postgresql://localhost:5432/myapp_test
LOG_LEVEL=error

Reference Guides

Detailed implementations in the references/ directory:

Guide	Contents
Environment Variables	Environment Variables
Configuration Hierarchies	Configuration Hierarchies
Secret Management	Secret Management
Feature Flags	Feature Flags
12-Factor App Configuration	12-Factor App Configuration
Configuration Validation	Configuration Validation
Dynamic Configuration (Remote Config)	Dynamic Configuration (Remote Config)

Read the full file on GitHub · 106 lines

Files

What ships with it

9 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 · 106 lines · 42 tokens per session scan A 1fe131c07830

Subscribe to this mod's changes

configuration-management is a skill published in the GitHub repository aj-geddes/useful-ai-prompts (376 stars, last pushed 8mo ago), licensed MIT. It adds 42 tokens to every session and 700 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.

DevOps and cloud Security

configuration-management next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
configuration-managementaj-geddes/useful-ai-prompts	Skill	376	8mo ago	MIT	A	42	Claude Code, Codex
imagegenopenai/codex	Skill	133k	yesterday	Apache-2.0	A	113	Codex
playwright-climicrosoft/playwright	Skill	99k	yesterday	Apache-2.0	A	19	Claude Code
local-ai-agentsmicrosoft/ai-agents-for-beginners	Skill	79k	4d ago	MIT	A	200	Claude Code, Codex
systematic-debuggingobra/superpowers	Skill	313k	3d ago	MIT	A	21	Claude Code
next-cache-components-adoptionvercel/next.js	Skill	143k	yesterday	MIT	A	95	Claude Code
next-partial-prefetching-adoptionvercel/next.js	Skill	143k	yesterday	MIT	A	103	Claude Code

configuration-management