{
  "uid": "cogitave.learn.configuration-management.introduction",
  "kind": "moduleUnit",
  "href": "/modules/configuration-management/introduction/",
  "title": "Introduction",
  "summary": "",
  "type": null,
  "products": [],
  "roles": [],
  "levels": [],
  "subjects": [],
  "headings": [
    "What you will be able to do"
  ],
  "source": "Misconfiguration is not a minor operational nuisance. Across two decades of\nempirical research, configuration errors are the largest category of operator\nerror, and operator error is the largest single source of failure - yet the\nsystem's own handling of bad input is often the real defect, because it accepts\na wrong value silently instead of refusing to run. Cogitave's response is a\n**cert-grade** rule: a service must **refuse to start** when it is misconfigured,\nrather than fail deep in production.\n\nThat rule has a governing document. The\n[configuration standard](../../../../standards/docs/standards/configuration.md)\nowns *how config works* - classification, precedence, typed schema-validated\nparsing, and config-as-code. The\n[secrets & environment standard](../../../../standards/docs/standards/secrets-and-env.md)\nowns *secret material* - the store, rotation, and how developers manage local\n`.env` files. This module teaches you to **use both**; when you need the full\ndetail, follow the link to the standard rather than trusting a paraphrase.\n\n> [!IMPORTANT]\n> **Nothing that varies between deployments is hardcoded.** Every such value is a\n> typed, externalized parameter, and every secret is a *reference* resolved at\n> runtime. This is the configuration standard's opening line, and it is the one\n> idea the rest of the module builds on.\n\n## What you will be able to do\n\n- **Classify** any value as a domain invariant, a deployment parameter, or a\n  secret - and know the litmus test that draws the line.\n- **Load** configuration through the standard precedence chain, parsed once into\n  one typed, immutable value that fails closed.\n- **Select an environment** the right way - by which overlay file loads, not by\n  branching on the environment name in code.\n- **Manage secrets safely** - hold a reference in config, resolve it at runtime,\n  and commit only encrypted-at-rest `.env` files with the key held in the store.\n\nTwo units of substance, a knowledge check, and a summary. By the end you can\nconfigure a real service and manage its secrets without ever putting a credential\nin git.\n",
  "partOf": "cogitave.learn.configuration-management",
  "durationInMinutes": 4,
  "quiz": null
}