levels.json

{
  "generated_at": "2026-04-13T17:22:42.526383+00:00",
  "level_count": 133,
  "modules": [
    {
      "name": "module-1-basics",
      "levels": [
        {
          "id": "module-1-basics/level-1-chart-structure",
          "name": "level-1-chart-structure",
          "path": "modules/module-1-basics/level-1-chart-structure",
          "mission": {
            "name": "Missing API Version",
            "description": "helm install fails immediately with a parse error.",
            "objective": "Add `apiVersion: v2` to Chart.yaml",
            "xp": 100,
            "difficulty": "beginner",
            "expected_time": "5m",
            "concepts": [
              "Chart.yaml",
              "apiVersion",
              "chart structure"
            ],
            "module": "module-1-basics",
            "level": "level-1-chart-structure"
          }
        },
        {
          "id": "module-1-basics/level-2-install-first-chart",
          "name": "level-2-install-first-chart",
          "path": "modules/module-1-basics/level-2-install-first-chart",
          "mission": {
            "name": "The First Deploy",
            "description": "A simple nginx chart exists but `helm install` fails with \"release name not valid\".",
            "objective": "Use a valid release name like `nginx-app`",
            "xp": 100,
            "difficulty": "beginner",
            "expected_time": "5m",
            "concepts": [
              "release name rules",
              "helm install syntax"
            ],
            "module": "module-1-basics",
            "level": "level-2-install-first-chart"
          }
        },
        {
          "id": "module-1-basics/level-3-wrong-image-tag",
          "name": "level-3-wrong-image-tag",
          "path": "modules/module-1-basics/level-3-wrong-image-tag",
          "mission": {
            "name": "Image Not Found",
            "description": "Chart installs but Pod goes into ImagePullBackOff.",
            "objective": "Change tag to `latest`",
            "xp": 100,
            "difficulty": "beginner",
            "expected_time": "5m",
            "concepts": [
              "values.yaml",
              "image.tag",
              "ImagePullBackOff"
            ],
            "module": "module-1-basics",
            "level": "level-3-wrong-image-tag"
          }
        },
        {
          "id": "module-1-basics/level-4-replica-type-error",
          "name": "level-4-replica-type-error",
          "path": "modules/module-1-basics/level-4-replica-type-error",
          "mission": {
            "name": "Not a Number",
            "description": "helm install fails with \"cannot unmarshal string into Go value of type int32\".",
            "objective": "Change to `replicaCount: 3` (no quotes)",
            "xp": 150,
            "difficulty": "beginner",
            "expected_time": "8m",
            "concepts": [
              "YAML types",
              "string vs integer",
              "helm type coercion"
            ],
            "module": "module-1-basics",
            "level": "level-4-replica-type-error"
          }
        },
        {
          "id": "module-1-basics/level-5-missing-required-value",
          "name": "level-5-missing-required-value",
          "path": "modules/module-1-basics/level-5-missing-required-value",
          "mission": {
            "name": "Required But Missing",
            "description": "helm install fails with \"required value missing: .Values.app.name\".",
            "objective": "Add `app:\\n  name: my-app` to values.yaml",
            "xp": 150,
            "difficulty": "beginner",
            "expected_time": "8m",
            "concepts": [
              "required function",
              "values structure",
              "template errors"
            ],
            "module": "module-1-basics",
            "level": "level-5-missing-required-value"
          }
        },
        {
          "id": "module-1-basics/level-6-wrong-service-type",
          "name": "level-6-wrong-service-type",
          "path": "modules/module-1-basics/level-6-wrong-service-type",
          "mission": {
            "name": "Can't Reach It",
            "description": "App deploys but isn't accessible. Service type is wrong.",
            "objective": "Change to `ClusterIP`",
            "xp": 100,
            "difficulty": "beginner",
            "expected_time": "5m",
            "concepts": [
              "Service types",
              "ClusterIP",
              "NodePort",
              "values"
            ],
            "module": "module-1-basics",
            "level": "level-6-wrong-service-type"
          }
        },
        {
          "id": "module-1-basics/level-7-port-mismatch",
          "name": "level-7-port-mismatch",
          "path": "modules/module-1-basics/level-7-port-mismatch",
          "mission": {
            "name": "Wrong Door",
            "description": "Service created but no endpoints. Port mismatch between service and container.",
            "objective": "Change targetPort to 80",
            "xp": 150,
            "difficulty": "beginner",
            "expected_time": "8m",
            "concepts": [
              "port vs targetPort",
              "containerPort",
              "service routing"
            ],
            "module": "module-1-basics",
            "level": "level-7-port-mismatch"
          }
        },
        {
          "id": "module-1-basics/level-8-namespace-missing",
          "name": "level-8-namespace-missing",
          "path": "modules/module-1-basics/level-8-namespace-missing",
          "mission": {
            "name": "Where Am I?",
            "description": "`helm install` fails with \"namespace not found\".",
            "objective": "Add `--create-namespace` flag or pre-create the namespace",
            "xp": 100,
            "difficulty": "beginner",
            "expected_time": "5m",
            "concepts": [
              "namespaces",
              "--create-namespace",
              "helm install flags"
            ],
            "module": "module-1-basics",
            "level": "level-8-namespace-missing"
          }
        },
        {
          "id": "module-1-basics/level-9-already-exists",
          "name": "level-9-already-exists",
          "path": "modules/module-1-basics/level-9-already-exists",
          "mission": {
            "name": "Already Taken",
            "description": "Second `helm install` fails with \"cannot re-use a name that is still in use\".",
            "objective": "Use `helm upgrade --install webapp` instead of `helm install webapp`",
            "xp": 150,
            "difficulty": "beginner",
            "expected_time": "8m",
            "concepts": [
              "helm install vs upgrade",
              "--install flag",
              "idempotency"
            ],
            "module": "module-1-basics",
            "level": "level-9-already-exists"
          }
        },
        {
          "id": "module-1-basics/level-10-set-wrong-key",
          "name": "level-10-set-wrong-key",
          "path": "modules/module-1-basics/level-10-set-wrong-key",
          "mission": {
            "name": "Override Miss",
            "description": "`helm upgrade --set` is used but the replica count doesn't change.",
            "objective": "Change to `--set replicaCount=5` (camelCase)",
            "xp": 150,
            "difficulty": "beginner",
            "expected_time": "8m",
            "concepts": [
              "--set flag",
              "case sensitivity",
              "values path"
            ],
            "module": "module-1-basics",
            "level": "level-10-set-wrong-key"
          }
        },
        {
          "id": "module-1-basics/level-11-get-values",
          "name": "level-11-get-values",
          "path": "modules/module-1-basics/level-11-get-values",
          "mission": {
            "name": "What's Actually Running?",
            "description": "Player must identify a misconfigured value in the running release.",
            "objective": "Use `helm upgrade` with corrected image.repository in values.yaml",
            "xp": 100,
            "difficulty": "beginner",
            "expected_time": "5m",
            "concepts": [
              "helm get values",
              "helm get manifest",
              "debugging live releases"
            ],
            "module": "module-1-basics",
            "level": "level-11-get-values"
          }
        },
        {
          "id": "module-1-basics/level-12-chart-version-mismatch",
          "name": "level-12-chart-version-mismatch",
          "path": "modules/module-1-basics/level-12-chart-version-mismatch",
          "mission": {
            "name": "Wrong Version",
            "description": "helm upgrade rejects chart because appVersion doesn't match running app.",
            "objective": "Align appVersion in Chart.yaml or update image tag in values",
            "xp": 150,
            "difficulty": "beginner",
            "expected_time": "10m",
            "concepts": [
              "chart version vs appVersion",
              "versioning strategy"
            ],
            "module": "module-1-basics",
            "level": "level-12-chart-version-mismatch"
          }
        },
        {
          "id": "module-1-basics/level-13-show-commands",
          "name": "level-13-show-commands",
          "path": "modules/module-1-basics/level-13-show-commands",
          "mission": {
            "name": "Inspect Before You Deploy",
            "description": "Chart has wrong default resources. Player must identify via helm show.",
            "objective": "Override with `-f custom-values.yaml` setting memory to 256Mi",
            "xp": 100,
            "difficulty": "beginner",
            "expected_time": "5m",
            "concepts": [
              "helm show values",
              "helm show chart",
              "pre-install inspection"
            ],
            "module": "module-1-basics",
            "level": "level-13-show-commands"
          }
        },
        {
          "id": "module-1-basics/level-14-dry-run",
          "name": "level-14-dry-run",
          "path": "modules/module-1-basics/level-14-dry-run",
          "mission": {
            "name": "Test Before You Break",
            "description": "Chart has a template error. Player must catch it before real install.",
            "objective": "Use `helm install --dry-run` to catch the error, then add `default` function",
            "xp": 150,
            "difficulty": "beginner",
            "expected_time": "8m",
            "concepts": [
              "--dry-run",
              "helm template",
              "nil pointer",
              "default function"
            ],
            "module": "module-1-basics",
            "level": "level-14-dry-run"
          }
        },
        {
          "id": "module-1-basics/level-15-helm-lint",
          "name": "level-15-helm-lint",
          "path": "modules/module-1-basics/level-15-helm-lint",
          "mission": {
            "name": "Lint It First",
            "description": "Chart has multiple lint errors blocking install.",
            "objective": "Add description, rename template file",
            "xp": 150,
            "difficulty": "beginner",
            "expected_time": "8m",
            "concepts": [
              "helm lint",
              "Chart.yaml required fields",
              "template naming"
            ],
            "module": "module-1-basics",
            "level": "level-15-helm-lint"
          }
        }
      ]
    },
    {
      "name": "module-2-values",
      "levels": [
        {
          "id": "module-2-values/level-1-string-as-int",
          "name": "level-1-string-as-int",
          "path": "modules/module-2-values/level-1-string-as-int",
          "mission": {
            "name": "Quoted Numbers",
            "description": "Deployment fails — replicas field receives a string.",
            "objective": "Remove quotes OR add `| int` in template",
            "xp": 150,
            "difficulty": "beginner",
            "expected_time": "8m",
            "concepts": [
              "YAML types",
              "int conversion",
              "toYaml",
              "type coercion"
            ],
            "module": "module-2-values",
            "level": "level-1-string-as-int"
          }
        },
        {
          "id": "module-2-values/level-2-bool-as-string",
          "name": "level-2-bool-as-string",
          "path": "modules/module-2-values/level-2-bool-as-string",
          "mission": {
            "name": "True or 'True'?",
            "description": "Feature flag in values is `\"true\"` (string) but template uses `if .Values.feature.enabled` — always evaluates to truthy.",
            "objective": "Change to `feature.enabled: false` (boolean)",
            "xp": 150,
            "difficulty": "beginner",
            "expected_time": "8m",
            "concepts": [
              "YAML booleans",
              "truthy strings",
              "if evaluation"
            ],
            "module": "module-2-values",
            "level": "level-2-bool-as-string"
          }
        },
        {
          "id": "module-2-values/level-3-nil-nested-key",
          "name": "level-3-nil-nested-key",
          "path": "modules/module-2-values/level-3-nil-nested-key",
          "mission": {
            "name": "Nil Pointer Panic",
            "description": "helm template crashes with nil pointer dereference.",
            "objective": "Add `database:\\n  host: localhost` to values.yaml OR use `{{ if .Values.database }}` guard",
            "xp": 200,
            "difficulty": "intermediate",
            "expected_time": "10m",
            "concepts": [
              "nil pointer",
              "defensive templates",
              "with block"
            ],
            "module": "module-2-values",
            "level": "level-3-nil-nested-key"
          }
        },
        {
          "id": "module-2-values/level-4-nested-path-wrong",
          "name": "level-4-nested-path-wrong",
          "path": "modules/module-2-values/level-4-nested-path-wrong",
          "mission": {
            "name": "Lost in the Tree",
            "description": "Override is passed but has no effect — wrong nesting path.",
            "objective": "Change --set to `--set database.host=db` (remove extra `config.` prefix)",
            "xp": 150,
            "difficulty": "beginner",
            "expected_time": "8m",
            "concepts": [
              "nested values",
              "--set path syntax",
              "dot notation"
            ],
            "module": "module-2-values",
            "level": "level-4-nested-path-wrong"
          }
        },
        {
          "id": "module-2-values/level-5-array-vs-string",
          "name": "level-5-array-vs-string",
          "path": "modules/module-2-values/level-5-array-vs-string",
          "mission": {
            "name": "One or Many?",
            "description": "Template expects a list for `ingress.hosts` but values has a single string.",
            "objective": "Change to `ingress.hosts:\\n  - \"example.com\"` (YAML list)",
            "xp": 200,
            "difficulty": "intermediate",
            "expected_time": "12m",
            "concepts": [
              "YAML arrays",
              "range",
              "list vs scalar"
            ],
            "module": "module-2-values",
            "level": "level-5-array-vs-string"
          }
        },
        {
          "id": "module-2-values/level-6-set-array-syntax",
          "name": "level-6-set-array-syntax",
          "path": "modules/module-2-values/level-6-set-array-syntax",
          "mission": {
            "name": "Arrays in --set",
            "description": "`--set` flag for an array value is malformed.",
            "objective": "Use `--set ingress.hosts={host1.com,host2.com}` (curly braces for arrays)",
            "xp": 200,
            "difficulty": "intermediate",
            "expected_time": "12m",
            "concepts": [
              "--set array syntax",
              "{}",
              "comma-separated values"
            ],
            "module": "module-2-values",
            "level": "level-6-set-array-syntax"
          }
        },
        {
          "id": "module-2-values/level-7-values-file-ignored",
          "name": "level-7-values-file-ignored",
          "path": "modules/module-2-values/level-7-values-file-ignored",
          "mission": {
            "name": "My Overrides Are Gone",
            "description": "Player provides `-f custom.yaml` but the values don't appear to apply.",
            "objective": "Fix indentation — values.yaml structure must match chart expectations",
            "xp": 150,
            "difficulty": "beginner",
            "expected_time": "8m",
            "concepts": [
              "-f flag",
              "YAML indentation",
              "values merging"
            ],
            "module": "module-2-values",
            "level": "level-7-values-file-ignored"
          }
        },
        {
          "id": "module-2-values/level-8-default-not-applied",
          "name": "level-8-default-not-applied",
          "path": "modules/module-2-values/level-8-default-not-applied",
          "mission": {
            "name": "Where's My Default?",
            "description": "Template fails when optional value is unset — no `default` used.",
            "objective": "Add `{{ .Values.optional.timeout | default 30 }}` in template",
            "xp": 150,
            "difficulty": "beginner",
            "expected_time": "8m",
            "concepts": [
              "default function",
              "optional values",
              "defensive templates"
            ],
            "module": "module-2-values",
            "level": "level-8-default-not-applied"
          }
        },
        {
          "id": "module-2-values/level-9-values-indentation",
          "name": "level-9-values-indentation",
          "path": "modules/module-2-values/level-9-values-indentation",
          "mission": {
            "name": "YAML Indent Hell",
            "description": "values.yaml fails to parse — mixed tabs and spaces.",
            "objective": "Replace all tabs with spaces (2-space indent)",
            "xp": 200,
            "difficulty": "intermediate",
            "expected_time": "12m",
            "concepts": [
              "YAML spec",
              "tabs vs spaces",
              "indent rules"
            ],
            "module": "module-2-values",
            "level": "level-9-values-indentation"
          }
        },
        {
          "id": "module-2-values/level-10-env-specific-values",
          "name": "level-10-env-specific-values",
          "path": "modules/module-2-values/level-10-env-specific-values",
          "mission": {
            "name": "Wrong Environment",
            "description": "App deployed with production database URL in dev environment.",
            "objective": "Create `values-dev.yaml` overriding database.url, apply with `-f values-dev.yaml`",
            "xp": 200,
            "difficulty": "intermediate",
            "expected_time": "12m",
            "concepts": [
              "environment-specific values files",
              "values layering",
              "-f precedence"
            ],
            "module": "module-2-values",
            "level": "level-10-env-specific-values"
          }
        },
        {
          "id": "module-2-values/level-11-special-chars",
          "name": "level-11-special-chars",
          "path": "modules/module-2-values/level-11-special-chars",
          "mission": {
            "name": "Escape Artist",
            "description": "Password value with special characters breaks YAML parsing.",
            "objective": "Quote the value: `db.password: \"p@ss!word#1\"`",
            "xp": 200,
            "difficulty": "intermediate",
            "expected_time": "12m",
            "concepts": [
              "YAML quoting",
              "special characters",
              "strings"
            ],
            "module": "module-2-values",
            "level": "level-11-special-chars"
          }
        },
        {
          "id": "module-2-values/level-12-wrong-units",
          "name": "level-12-wrong-units",
          "path": "modules/module-2-values/level-12-wrong-units",
          "mission": {
            "name": "Mega vs Mebi",
            "description": "Memory limit set to `256` (bytes) instead of `256Mi`.",
            "objective": "Change to `resources.limits.memory: 256Mi`",
            "xp": 150,
            "difficulty": "beginner",
            "expected_time": "8m",
            "concepts": [
              "Kubernetes resource units",
              "Mi vs M",
              "CPU millicores"
            ],
            "module": "module-2-values",
            "level": "level-12-wrong-units"
          }
        },
        {
          "id": "module-2-values/level-13-missing-registry",
          "name": "level-13-missing-registry",
          "path": "modules/module-2-values/level-13-missing-registry",
          "mission": {
            "name": "Registry Not Found",
            "description": "Pod fails with ImagePullBackOff — image registry prefix missing.",
            "objective": "Add full registry path to image.repository",
            "xp": 150,
            "difficulty": "beginner",
            "expected_time": "8m",
            "concepts": [
              "image registry",
              "repository naming",
              "imagePullSecrets"
            ],
            "module": "module-2-values",
            "level": "level-13-missing-registry"
          }
        },
        {
          "id": "module-2-values/level-14-values-schema",
          "name": "level-14-values-schema",
          "path": "modules/module-2-values/level-14-values-schema",
          "mission": {
            "name": "Schema Says No",
            "description": "helm install fails with JSON schema validation error.",
            "objective": "Set replicaCount to at least 1",
            "xp": 250,
            "difficulty": "intermediate",
            "expected_time": "15m",
            "concepts": [
              "values.schema.json",
              "JSON Schema validation",
              "chart contracts"
            ],
            "module": "module-2-values",
            "level": "level-14-values-schema"
          }
        },
        {
          "id": "module-2-values/level-15-helm-set-string",
          "name": "level-15-helm-set-string",
          "path": "modules/module-2-values/level-15-helm-set-string",
          "mission": {
            "name": "Force a String",
            "description": "`--set version=1.0` passes an integer but template expects string for label.",
            "objective": "Use `--set-string image.tag=1.0` to force string",
            "xp": 200,
            "difficulty": "intermediate",
            "expected_time": "10m",
            "concepts": [
              "--set-string",
              "type forcing",
              "--set vs --set-string"
            ],
            "module": "module-2-values",
            "level": "level-15-helm-set-string"
          }
        }
      ]
    },
    {
      "name": "module-3-templates",
      "levels": [
        {
          "id": "module-3-templates/level-1-missing-braces",
          "name": "level-1-missing-braces",
          "path": "modules/module-3-templates/level-1-missing-braces",
          "mission": {
            "name": "Unclosed Action",
            "description": "helm template fails with \"unclosed action\".",
            "objective": "Add missing `}` → `{{ .Values.app.name }}`",
            "xp": 200,
            "difficulty": "intermediate",
            "expected_time": "10m",
            "concepts": [
              "Go template syntax",
              "action delimiters"
            ],
            "module": "module-3-templates",
            "level": "level-1-missing-braces"
          }
        },
        {
          "id": "module-3-templates/level-2-yaml-indent-to",
          "name": "level-2-yaml-indent-to",
          "path": "modules/module-3-templates/level-2-yaml-indent-to",
          "mission": {
            "name": "toYaml Without Indent",
            "description": "Deployment fails — resources block is not properly indented.",
            "objective": "Change to `{{ .Values.resources | toYaml | indent 12 }}`",
            "xp": 250,
            "difficulty": "intermediate",
            "expected_time": "15m",
            "concepts": [
              "toYaml",
              "indent",
              "nindent",
              "multi-line values"
            ],
            "module": "module-3-templates",
            "level": "level-2-yaml-indent-to"
          }
        },
        {
          "id": "module-3-templates/level-3-values-typo",
          "name": "level-3-values-typo",
          "path": "modules/module-3-templates/level-3-values-typo",
          "mission": {
            "name": "The Missing Dot",
            "description": "Template renders empty string where image name should be.",
            "objective": "Correct to `{{ .Values.image.repository }}`",
            "xp": 200,
            "difficulty": "intermediate",
            "expected_time": "10m",
            "concepts": [
              "case sensitivity",
              "typos in template paths"
            ],
            "module": "module-3-templates",
            "level": "level-3-values-typo"
          }
        },
        {
          "id": "module-3-templates/level-4-release-name-context",
          "name": "level-4-release-name-context",
          "path": "modules/module-3-templates/level-4-release-name-context",
          "mission": {
            "name": "Lost Context",
            "description": "Template uses `.Release.Name` inside a `with` block — returns empty.",
            "objective": "Use `{{ with .Values.config }}{{ $.Release.Name }}{{ end }}` (dollar sign for root)",
            "xp": 250,
            "difficulty": "intermediate",
            "expected_time": "12m",
            "concepts": [
              "with block context",
              "$ root object",
              "scope"
            ],
            "module": "module-3-templates",
            "level": "level-4-release-name-context"
          }
        },
        {
          "id": "module-3-templates/level-5-template-function-error",
          "name": "level-5-template-function-error",
          "path": "modules/module-3-templates/level-5-template-function-error",
          "mission": {
            "name": "Function Not Found",
            "description": "Template fails with \"function 'uppercase' not defined\".",
            "objective": "Change to `{{ .Values.app.name | upper }}`",
            "xp": 200,
            "difficulty": "intermediate",
            "expected_time": "10m",
            "concepts": [
              "Sprig functions",
              "upper vs uppercase",
              "function names"
            ],
            "module": "module-3-templates",
            "level": "level-5-template-function-error"
          }
        },
        {
          "id": "module-3-templates/level-6-pipe-order",
          "name": "level-6-pipe-order",
          "path": "modules/module-3-templates/level-6-pipe-order",
          "mission": {
            "name": "Pipe Dream",
            "description": "Template produces wrong output — pipe order incorrect.",
            "objective": "Understand that empty string is falsy for `default` — use `| default \"latest\"` correctly OR use `required`",
            "xp": 250,
            "difficulty": "intermediate",
            "expected_time": "12m",
            "concepts": [
              "default with empty string",
              "falsy values",
              "pipe order"
            ],
            "module": "module-3-templates",
            "level": "level-6-pipe-order"
          }
        },
        {
          "id": "module-3-templates/level-7-include-missing",
          "name": "level-7-include-missing",
          "path": "modules/module-3-templates/level-7-include-missing",
          "mission": {
            "name": "Helper Not Found",
            "description": "helm template fails with \"no such template\".",
            "objective": "Either rename the helper or fix the include call to match",
            "xp": 250,
            "difficulty": "intermediate",
            "expected_time": "15m",
            "concepts": [
              "named templates",
              "_helpers.tpl",
              "include vs template"
            ],
            "module": "module-3-templates",
            "level": "level-7-include-missing"
          }
        },
        {
          "id": "module-3-templates/level-8-nindent-vs-indent",
          "name": "level-8-nindent-vs-indent",
          "path": "modules/module-3-templates/level-8-nindent-vs-indent",
          "mission": {
            "name": "Extra Blank Line",
            "description": "Rendered YAML has unexpected blank line causing parse error.",
            "objective": "Use `nindent` which adds newline before indenting, or remove the extra newline in helper",
            "xp": 200,
            "difficulty": "intermediate",
            "expected_time": "10m",
            "concepts": [
              "indent vs nindent",
              "whitespace control",
              "YAML parsing"
            ],
            "module": "module-3-templates",
            "level": "level-8-nindent-vs-indent"
          }
        },
        {
          "id": "module-3-templates/level-9-if-logic-inverted",
          "name": "level-9-if-logic-inverted",
          "path": "modules/module-3-templates/level-9-if-logic-inverted",
          "mission": {
            "name": "Backwards Logic",
            "description": "Service type is NodePort when it should be ClusterIP (and vice versa).",
            "objective": "Swap the if/else: `{{ if .Values.ingress.enabled }}ClusterIP{{ else }}NodePort{{ end }}`",
            "xp": 200,
            "difficulty": "intermediate",
            "expected_time": "10m",
            "concepts": [
              "if/else",
              "not",
              "boolean logic in templates"
            ],
            "module": "module-3-templates",
            "level": "level-9-if-logic-inverted"
          }
        },
        {
          "id": "module-3-templates/level-10-range-nil",
          "name": "level-10-range-nil",
          "path": "modules/module-3-templates/level-10-range-nil",
          "mission": {
            "name": "Range Over Nothing",
            "description": "helm template panics when env vars list is nil.",
            "objective": "Add `extraEnv: []` to values.yaml as default, OR guard with `{{ if .Values.extraEnv }}`",
            "xp": 250,
            "difficulty": "intermediate",
            "expected_time": "12m",
            "concepts": [
              "range",
              "nil slice",
              "empty list default",
              "defensive templates"
            ],
            "module": "module-3-templates",
            "level": "level-10-range-nil"
          }
        },
        {
          "id": "module-3-templates/level-11-with-context",
          "name": "level-11-with-context",
          "path": "modules/module-3-templates/level-11-with-context",
          "mission": {
            "name": "Who Am I?",
            "description": "Template produces wrong output inside with block.",
            "objective": "Use `{{ $.Values.app.name }}` (root context)",
            "xp": 250,
            "difficulty": "intermediate",
            "expected_time": "12m",
            "concepts": [
              "with context",
              "$ root",
              "nested with blocks"
            ],
            "module": "module-3-templates",
            "level": "level-11-with-context"
          }
        },
        {
          "id": "module-3-templates/level-12-tpl-function",
          "name": "level-12-tpl-function",
          "path": "modules/module-3-templates/level-12-tpl-function",
          "mission": {
            "name": "Template in Template",
            "description": "tpl function used incorrectly causes infinite recursion warning.",
            "objective": "Fix the values.yaml message to be a valid template string",
            "xp": 300,
            "difficulty": "advanced",
            "expected_time": "20m",
            "concepts": [
              "tpl function",
              "values as templates",
              "security implications"
            ],
            "module": "module-3-templates",
            "level": "level-12-tpl-function"
          }
        },
        {
          "id": "module-3-templates/level-13-required-blocks",
          "name": "level-13-required-blocks",
          "path": "modules/module-3-templates/level-13-required-blocks",
          "mission": {
            "name": "You Must Provide This",
            "description": "helm install blocks with unhelpful error from required.",
            "objective": "Set `global.clusterName: my-cluster` in values.yaml",
            "xp": 200,
            "difficulty": "intermediate",
            "expected_time": "10m",
            "concepts": [
              "required function",
              "error messages",
              "documentation through code"
            ],
            "module": "module-3-templates",
            "level": "level-13-required-blocks"
          }
        },
        {
          "id": "module-3-templates/level-14-configmap-multiline",
          "name": "level-14-configmap-multiline",
          "path": "modules/module-3-templates/level-14-configmap-multiline",
          "mission": {
            "name": "Multiline Madness",
            "description": "ConfigMap data has wrong multiline block syntax.",
            "objective": "Use `|` block scalar or `{{ .Values.config | nindent 4 }}`",
            "xp": 250,
            "difficulty": "intermediate",
            "expected_time": "15m",
            "concepts": [
              "multiline YAML",
              "block scalars",
              "quote vs nindent"
            ],
            "module": "module-3-templates",
            "level": "level-14-configmap-multiline"
          }
        },
        {
          "id": "module-3-templates/level-15-secret-b64enc",
          "name": "level-15-secret-b64enc",
          "path": "modules/module-3-templates/level-15-secret-b64enc",
          "mission": {
            "name": "Encode It",
            "description": "Secret created but values are not base64 encoded — kubectl shows garbage.",
            "objective": "Change to `password: {{ .Values.db.password | b64enc | quote }}`",
            "xp": 200,
            "difficulty": "intermediate",
            "expected_time": "10m",
            "concepts": [
              "Secret data vs stringData",
              "b64enc",
              "base64 in Kubernetes"
            ],
            "module": "module-3-templates",
            "level": "level-15-secret-b64enc"
          }
        },
        {
          "id": "module-3-templates/level-16-named-template-args",
          "name": "level-16-named-template-args",
          "path": "modules/module-3-templates/level-16-named-template-args",
          "mission": {
            "name": "Call With Context",
            "description": "Named template produces empty output — passed wrong context.",
            "objective": "Change to `{{ include \"myapp.fullname\" . }}`",
            "xp": 300,
            "difficulty": "advanced",
            "expected_time": "20m",
            "concepts": [
              "include context",
              "dict for multiple args",
              "template args"
            ],
            "module": "module-3-templates",
            "level": "level-16-named-template-args"
          }
        },
        {
          "id": "module-3-templates/level-17-whitespace-control",
          "name": "level-17-whitespace-control",
          "path": "modules/module-3-templates/level-17-whitespace-control",
          "mission": {
            "name": "Blank Line Invasion",
            "description": "Rendered YAML has many blank lines making it hard to read and causing parse issues.",
            "objective": "Add `-` to `{{-` and `-}}` consistently to trim whitespace",
            "xp": 250,
            "difficulty": "intermediate",
            "expected_time": "15m",
            "concepts": [
              "whitespace trimming",
              "{{- and -}}",
              "clean templates"
            ],
            "module": "module-3-templates",
            "level": "level-17-whitespace-control"
          }
        },
        {
          "id": "module-3-templates/level-18-multiple-documents",
          "name": "level-18-multiple-documents",
          "path": "modules/module-3-templates/level-18-multiple-documents",
          "mission": {
            "name": "Separate Your Resources",
            "description": "Template file creates two resources but missing `---` separator.",
            "objective": "Add `---` YAML document separator between resources",
            "xp": 250,
            "difficulty": "intermediate",
            "expected_time": "12m",
            "concepts": [
              "YAML document separator",
              "multiple resources per file",
              "helm conventions"
            ],
            "module": "module-3-templates",
            "level": "level-18-multiple-documents"
          }
        },
        {
          "id": "module-3-templates/level-19-define-reuse",
          "name": "level-19-define-reuse",
          "path": "modules/module-3-templates/level-19-define-reuse",
          "mission": {
            "name": "Don't Repeat Yourself",
            "description": "Labels are hardcoded in 3 templates instead of using a named helper — one was updated but not others.",
            "objective": "Move labels to `_helpers.tpl`, use `{{ include \"myapp.labels\" . }}` in all templates",
            "xp": 300,
            "difficulty": "advanced",
            "expected_time": "20m",
            "concepts": [
              "DRY principle",
              "_helpers.tpl",
              "template reuse"
            ],
            "module": "module-3-templates",
            "level": "level-19-define-reuse"
          }
        },
        {
          "id": "module-3-templates/level-20-lookup-function",
          "name": "level-20-lookup-function",
          "path": "modules/module-3-templates/level-20-lookup-function",
          "mission": {
            "name": "Does It Exist?",
            "description": "Chart blindly recreates Secret on each upgrade losing existing credentials.",
            "objective": "Use `lookup` to check if Secret exists, preserve existing value if so",
            "xp": 350,
            "difficulty": "advanced",
            "expected_time": "25m",
            "concepts": [
              "lookup function",
              "idempotent secrets",
              "upgrade safety"
            ],
            "module": "module-3-templates",
            "level": "level-20-lookup-function"
          }
        }
      ]
    },
    {
      "name": "module-4-releases",
      "levels": [
        {
          "id": "module-4-releases/level-1-failed-release",
          "name": "level-1-failed-release",
          "path": "modules/module-4-releases/level-1-failed-release",
          "mission": {
            "name": "The Failed State",
            "description": "Previous install left release in `failed` state — new install rejected.",
            "objective": "`helm uninstall <release>` then reinstall, OR fix the chart and `helm upgrade`",
            "xp": 200,
            "difficulty": "intermediate",
            "expected_time": "10m",
            "concepts": [
              "release states",
              "failed vs deployed",
              "cleanup"
            ],
            "module": "module-4-releases",
            "level": "level-1-failed-release"
          }
        },
        {
          "id": "module-4-releases/level-2-upgrade-after-fail",
          "name": "level-2-upgrade-after-fail",
          "path": "modules/module-4-releases/level-2-upgrade-after-fail",
          "mission": {
            "name": "Upgrade From Failure",
            "description": "`helm upgrade` on a failed release — must use `--force` or fix first.",
            "objective": "Fix the chart error (broken template), then helm upgrade",
            "xp": 250,
            "difficulty": "intermediate",
            "expected_time": "15m",
            "concepts": [
              "upgrade requirements",
              "--force",
              "fixing broken charts"
            ],
            "module": "module-4-releases",
            "level": "level-2-upgrade-after-fail"
          }
        },
        {
          "id": "module-4-releases/level-3-wait-timeout",
          "name": "level-3-wait-timeout",
          "path": "modules/module-4-releases/level-3-wait-timeout",
          "mission": {
            "name": "Timed Out Waiting",
            "description": "helm install with `--wait` times out — Pod never becomes Ready.",
            "objective": "Fix readiness probe port in values.yaml",
            "xp": 250,
            "difficulty": "intermediate",
            "expected_time": "15m",
            "concepts": [
              "--wait flag",
              "readiness probes",
              "liveness probes",
              "timeout"
            ],
            "module": "module-4-releases",
            "level": "level-3-wait-timeout"
          }
        },
        {
          "id": "module-4-releases/level-4-atomic-rollback",
          "name": "level-4-atomic-rollback",
          "path": "modules/module-4-releases/level-4-atomic-rollback",
          "mission": {
            "name": "Atomic or Nothing",
            "description": "`helm upgrade --atomic` fails and auto-rolls back — player must diagnose original error.",
            "objective": "Correct the image tag, upgrade again",
            "xp": 300,
            "difficulty": "advanced",
            "expected_time": "20m",
            "concepts": [
              "--atomic flag",
              "automatic rollback",
              "revision tracking"
            ],
            "module": "module-4-releases",
            "level": "level-4-atomic-rollback"
          }
        },
        {
          "id": "module-4-releases/level-5-upgrade-install",
          "name": "level-5-upgrade-install",
          "path": "modules/module-4-releases/level-5-upgrade-install",
          "mission": {
            "name": "One Command Rules All",
            "description": "CI pipeline fails on first deploy (no release exists) with plain `helm upgrade`.",
            "objective": "Change to `helm upgrade --install myapp ./chart`",
            "xp": 200,
            "difficulty": "intermediate",
            "expected_time": "10m",
            "concepts": [
              "upgrade --install",
              "idempotency",
              "CI patterns"
            ],
            "module": "module-4-releases",
            "level": "level-5-upgrade-install"
          }
        },
        {
          "id": "module-4-releases/level-6-resource-ownership",
          "name": "level-6-resource-ownership",
          "path": "modules/module-4-releases/level-6-resource-ownership",
          "mission": {
            "name": "Not My Resource",
            "description": "helm install fails — resource already exists but not managed by this release.",
            "objective": "Either delete the existing resource or adopt it with helm annotations",
            "xp": 300,
            "difficulty": "advanced",
            "expected_time": "20m",
            "concepts": [
              "helm annotations",
              "resource ownership",
              "--force",
              "adoption"
            ],
            "module": "module-4-releases",
            "level": "level-6-resource-ownership"
          }
        },
        {
          "id": "module-4-releases/level-7-immutable-field",
          "name": "level-7-immutable-field",
          "path": "modules/module-4-releases/level-7-immutable-field",
          "mission": {
            "name": "You Can't Change That",
            "description": "helm upgrade fails with \"field is immutable\".",
            "objective": "`helm uninstall` then reinstall (or use `helm upgrade --force` to recreate)",
            "xp": 250,
            "difficulty": "intermediate",
            "expected_time": "15m",
            "concepts": [
              "immutable fields",
              "selector labels",
              "--force recreation"
            ],
            "module": "module-4-releases",
            "level": "level-7-immutable-field"
          }
        },
        {
          "id": "module-4-releases/level-8-history-inspection",
          "name": "level-8-history-inspection",
          "path": "modules/module-4-releases/level-8-history-inspection",
          "mission": {
            "name": "History Lesson",
            "description": "App is broken — player must find which revision introduced the bug.",
            "objective": "Use `helm history`, `helm get values --revision N`, identify bad revision",
            "xp": 200,
            "difficulty": "intermediate",
            "expected_time": "10m",
            "concepts": [
              "helm history",
              "helm get --revision",
              "audit trail"
            ],
            "module": "module-4-releases",
            "level": "level-8-history-inspection"
          }
        },
        {
          "id": "module-4-releases/level-9-orphaned-resources",
          "name": "level-9-orphaned-resources",
          "path": "modules/module-4-releases/level-9-orphaned-resources",
          "mission": {
            "name": "Left Behind",
            "description": "After helm uninstall, some resources remain (they were created outside Helm).",
            "objective": "Delete orphaned resource, then helm install",
            "xp": 250,
            "difficulty": "intermediate",
            "expected_time": "15m",
            "concepts": [
              "helm uninstall scope",
              "orphaned resources",
              "resource tracking"
            ],
            "module": "module-4-releases",
            "level": "level-9-orphaned-resources"
          }
        },
        {
          "id": "module-4-releases/level-10-uninstall-keep-history",
          "name": "level-10-uninstall-keep-history",
          "path": "modules/module-4-releases/level-10-uninstall-keep-history",
          "mission": {
            "name": "Gone But Not Forgotten",
            "description": "Release uninstalled — player must restore it from history.",
            "objective": "`helm rollback <release> <revision>` to restore from kept history",
            "xp": 200,
            "difficulty": "intermediate",
            "expected_time": "10m",
            "concepts": [
              "--keep-history",
              "rollback after uninstall"
            ],
            "module": "module-4-releases",
            "level": "level-10-uninstall-keep-history"
          }
        },
        {
          "id": "module-4-releases/level-11-dry-run-vs-template",
          "name": "level-11-dry-run-vs-template",
          "path": "modules/module-4-releases/level-11-dry-run-vs-template",
          "mission": {
            "name": "Dry Run vs Template",
            "description": "`helm template` works but `helm install --dry-run` fails — understand the difference.",
            "objective": "Use `--dry-run` for cluster-aware checks",
            "xp": 200,
            "difficulty": "intermediate",
            "expected_time": "10m",
            "concepts": [
              "template vs dry-run",
              "cluster connectivity",
              "lookup availability"
            ],
            "module": "module-4-releases",
            "level": "level-11-dry-run-vs-template"
          }
        },
        {
          "id": "module-4-releases/level-12-pending-install",
          "name": "level-12-pending-install",
          "path": "modules/module-4-releases/level-12-pending-install",
          "mission": {
            "name": "Stuck Pending",
            "description": "Release stuck in `pending-install` state — process was killed mid-install.",
            "objective": "`helm uninstall <release>` to clear state (even for pending)",
            "xp": 300,
            "difficulty": "advanced",
            "expected_time": "10m",
            "concepts": [
              "pending states",
              "interrupted installs",
              "recovery"
            ],
            "module": "module-4-releases",
            "level": "level-12-pending-install"
          }
        },
        {
          "id": "module-4-releases/level-13-crd-ordering",
          "name": "level-13-crd-ordering",
          "path": "modules/module-4-releases/level-13-crd-ordering",
          "mission": {
            "name": "CRD First",
            "description": "Chart installs CRD and CR in same release — CR fails because CRD not ready yet.",
            "objective": "Move CRD to crds/ directory (installed before templates)",
            "xp": 300,
            "difficulty": "advanced",
            "expected_time": "20m",
            "concepts": [
              "crds/ directory",
              "CRD install ordering",
              "helm CRD handling"
            ],
            "module": "module-4-releases",
            "level": "level-13-crd-ordering"
          }
        },
        {
          "id": "module-4-releases/level-14-helm-test",
          "name": "level-14-helm-test",
          "path": "modules/module-4-releases/level-14-helm-test",
          "mission": {
            "name": "Test Your Release",
            "description": "`helm test` fails — test pod has wrong command.",
            "objective": "Fix the service name in the test template",
            "xp": 250,
            "difficulty": "intermediate",
            "expected_time": "15m",
            "concepts": [
              "helm test",
              "test hooks",
              "release verification"
            ],
            "module": "module-4-releases",
            "level": "level-14-helm-test"
          }
        },
        {
          "id": "module-4-releases/level-15-notes-template",
          "name": "level-15-notes-template",
          "path": "modules/module-4-releases/level-15-notes-template",
          "mission": {
            "name": "Post-Install Instructions",
            "description": "NOTES.txt has a template error — install succeeds but notes crash.",
            "objective": "Remove or fix the bad reference",
            "xp": 150,
            "difficulty": "beginner",
            "expected_time": "8m",
            "concepts": [
              "NOTES.txt",
              "post-install messages",
              "template in NOTES"
            ],
            "module": "module-4-releases",
            "level": "level-15-notes-template"
          }
        }
      ]
    },
    {
      "name": "module-5-rollbacks",
      "levels": [
        {
          "id": "module-5-rollbacks/level-1-simple-rollback",
          "name": "level-1-simple-rollback",
          "path": "modules/module-5-rollbacks/level-1-simple-rollback",
          "mission": {
            "name": "One Step Back",
            "description": "Bad upgrade broke the app — perform a simple rollback.",
            "objective": "`helm rollback <release> 1`",
            "xp": 200,
            "difficulty": "intermediate",
            "expected_time": "10m",
            "concepts": [
              "helm rollback",
              "revision numbers"
            ],
            "module": "module-5-rollbacks",
            "level": "level-1-simple-rollback"
          }
        },
        {
          "id": "module-5-rollbacks/level-2-rollback-values",
          "name": "level-2-rollback-values",
          "path": "modules/module-5-rollbacks/level-2-rollback-values",
          "mission": {
            "name": "Values Travel Back Too",
            "description": "Player expects rollback to restore previous values — confirm this behavior.",
            "objective": "Rollback restores replicaCount to 3",
            "xp": 250,
            "difficulty": "intermediate",
            "expected_time": "12m",
            "concepts": [
              "values restored on rollback",
              "what rollback restores"
            ],
            "module": "module-5-rollbacks",
            "level": "level-2-rollback-values"
          }
        },
        {
          "id": "module-5-rollbacks/level-3-specific-revision",
          "name": "level-3-specific-revision",
          "path": "modules/module-5-rollbacks/level-3-specific-revision",
          "mission": {
            "name": "Time Machine",
            "description": "Multiple upgrades; player must roll back 3 versions to find working state.",
            "objective": "`helm rollback <release> 1`",
            "xp": 250,
            "difficulty": "intermediate",
            "expected_time": "15m",
            "concepts": [
              "helm history",
              "specific revision rollback"
            ],
            "module": "module-5-rollbacks",
            "level": "level-3-specific-revision"
          }
        },
        {
          "id": "module-5-rollbacks/level-4-rollback-deleted-resource",
          "name": "level-4-rollback-deleted-resource",
          "path": "modules/module-5-rollbacks/level-4-rollback-deleted-resource",
          "mission": {
            "name": "Can't Rollback That",
            "description": "Rollback fails because a manually deleted resource can't be restored.",
            "objective": "Recreate the ConfigMap manually, then retry rollback",
            "xp": 300,
            "difficulty": "advanced",
            "expected_time": "20m",
            "concepts": [
              "rollback limitations",
              "manual changes vs helm managed"
            ],
            "module": "module-5-rollbacks",
            "level": "level-4-rollback-deleted-resource"
          }
        },
        {
          "id": "module-5-rollbacks/level-5-rollback-with-wait",
          "name": "level-5-rollback-with-wait",
          "path": "modules/module-5-rollbacks/level-5-rollback-with-wait",
          "mission": {
            "name": "Wait For It",
            "description": "Rollback completes but app not healthy — need --wait flag.",
            "objective": "Use `helm rollback --wait <release> <revision>`",
            "xp": 250,
            "difficulty": "intermediate",
            "expected_time": "15m",
            "concepts": [
              "--wait on rollback",
              "readiness vs completion"
            ],
            "module": "module-5-rollbacks",
            "level": "level-5-rollback-with-wait"
          }
        },
        {
          "id": "module-5-rollbacks/level-6-history-limit",
          "name": "level-6-history-limit",
          "path": "modules/module-5-rollbacks/level-6-history-limit",
          "mission": {
            "name": "History Is Full",
            "description": "helm history only shows 10 entries — older revisions gone.",
            "objective": "Configure --history-max larger, or accept limitation and fix forward",
            "xp": 200,
            "difficulty": "intermediate",
            "expected_time": "10m",
            "concepts": [
              "--history-max",
              "helm config",
              "history cleanup"
            ],
            "module": "module-5-rollbacks",
            "level": "level-6-history-limit"
          }
        },
        {
          "id": "module-5-rollbacks/level-7-force-upgrade",
          "name": "level-7-force-upgrade",
          "path": "modules/module-5-rollbacks/level-7-force-upgrade",
          "mission": {
            "name": "Force It Through",
            "description": "Upgrade blocked by immutable field — use --force to recreate resources.",
            "objective": "`helm upgrade --force` (deletes and recreates)",
            "xp": 300,
            "difficulty": "advanced",
            "expected_time": "20m",
            "concepts": [
              "--force",
              "resource recreation",
              "downtime implications"
            ],
            "module": "module-5-rollbacks",
            "level": "level-7-force-upgrade"
          }
        },
        {
          "id": "module-5-rollbacks/level-8-cleanup-failed",
          "name": "level-8-cleanup-failed",
          "path": "modules/module-5-rollbacks/level-8-cleanup-failed",
          "mission": {
            "name": "Clean Slate",
            "description": "Repeated failed installs left many `failed` revisions; chart fundamentally broken.",
            "objective": "Fix the template, helm upgrade to create successful revision",
            "xp": 250,
            "difficulty": "intermediate",
            "expected_time": "15m",
            "concepts": [
              "recovery from repeated failures",
              "upgrade vs reinstall"
            ],
            "module": "module-5-rollbacks",
            "level": "level-8-cleanup-failed"
          }
        },
        {
          "id": "module-5-rollbacks/level-9-upgrade-path",
          "name": "level-9-upgrade-path",
          "path": "modules/module-5-rollbacks/level-9-upgrade-path",
          "mission": {
            "name": "The Long Road Back",
            "description": "8 revisions; player must trace which revision introduced a memory leak (wrong limit).",
            "objective": "Find the revision using `helm get values --revision N`, rollback",
            "xp": 300,
            "difficulty": "advanced",
            "expected_time": "20m",
            "concepts": [
              "bisecting helm history",
              "get values per revision"
            ],
            "module": "module-5-rollbacks",
            "level": "level-9-upgrade-path"
          }
        },
        {
          "id": "module-5-rollbacks/level-10-rollback-hooks",
          "name": "level-10-rollback-hooks",
          "path": "modules/module-5-rollbacks/level-10-rollback-hooks",
          "mission": {
            "name": "Hooks on Rollback",
            "description": "post-rollback hook fails — migration script not idempotent.",
            "objective": "Make hook idempotent (IF NOT EXISTS pattern)",
            "xp": 300,
            "difficulty": "advanced",
            "expected_time": "20m",
            "concepts": [
              "post-rollback hooks",
              "idempotency",
              "hook failure handling"
            ],
            "module": "module-5-rollbacks",
            "level": "level-10-rollback-hooks"
          }
        },
        {
          "id": "module-5-rollbacks/level-11-revision-gaps",
          "name": "level-11-revision-gaps",
          "path": "modules/module-5-rollbacks/level-11-revision-gaps",
          "mission": {
            "name": "Missing Revisions",
            "description": "helm history shows gaps (1, 2, 5) — player confused about what happened.",
            "objective": "Understand gaps are from failed/cleaned revisions; rollback to 2",
            "xp": 250,
            "difficulty": "intermediate",
            "expected_time": "15m",
            "concepts": [
              "history gaps",
              "failed revision cleanup",
              "--keep-history"
            ],
            "module": "module-5-rollbacks",
            "level": "level-11-revision-gaps"
          }
        },
        {
          "id": "module-5-rollbacks/level-12-pvc-rollback",
          "name": "level-12-pvc-rollback",
          "path": "modules/module-5-rollbacks/level-12-pvc-rollback",
          "mission": {
            "name": "Persistent Volume Problem",
            "description": "Rollback succeeds but StatefulSet PVC binding prevents pod from starting.",
            "objective": "Understand PVC immutability; restore data manually if needed",
            "xp": 350,
            "difficulty": "advanced",
            "expected_time": "25m",
            "concepts": [
              "PVC immutability",
              "StatefulSet rollback limitations"
            ],
            "module": "module-5-rollbacks",
            "level": "level-12-pvc-rollback"
          }
        },
        {
          "id": "module-5-rollbacks/level-13-rollback-configmap",
          "name": "level-13-rollback-configmap",
          "path": "modules/module-5-rollbacks/level-13-rollback-configmap",
          "mission": {
            "name": "Config Restored",
            "description": "Wrong nginx config deployed — rollback should restore working config.",
            "objective": "`helm rollback` restores previous ConfigMap",
            "xp": 200,
            "difficulty": "intermediate",
            "expected_time": "10m",
            "concepts": [
              "ConfigMap in rollback",
              "configuration management"
            ],
            "module": "module-5-rollbacks",
            "level": "level-13-rollback-configmap"
          }
        },
        {
          "id": "module-5-rollbacks/level-14-blue-green-rollback",
          "name": "level-14-blue-green-rollback",
          "path": "modules/module-5-rollbacks/level-14-blue-green-rollback",
          "mission": {
            "name": "Switch Lanes",
            "description": "Blue/green deployment via Helm — bad green deploy, switch back to blue.",
            "objective": "Helm upgrade to switch Service selector back to blue",
            "xp": 350,
            "difficulty": "advanced",
            "expected_time": "25m",
            "concepts": [
              "blue/green with Helm",
              "selector-based routing"
            ],
            "module": "module-5-rollbacks",
            "level": "level-14-blue-green-rollback"
          }
        },
        {
          "id": "module-5-rollbacks/level-15-production-incident",
          "name": "level-15-production-incident",
          "path": "modules/module-5-rollbacks/level-15-production-incident",
          "mission": {
            "name": "Production Is Down",
            "description": "Full production incident simulation — identify broken revision, rollback, verify recovery.",
            "objective": "Helm history analysis, targeted rollback of specific subchart",
            "xp": 400,
            "difficulty": "advanced",
            "expected_time": "30m",
            "concepts": [
              "incident response",
              "umbrella charts",
              "rollback under pressure"
            ],
            "module": "module-5-rollbacks",
            "level": "level-15-production-incident"
          }
        }
      ]
    },
    {
      "name": "module-6-dependencies",
      "levels": [
        {
          "id": "module-6-dependencies/level-1-missing-lock",
          "name": "level-1-missing-lock",
          "path": "modules/module-6-dependencies/level-1-missing-lock",
          "mission": {
            "name": "Lock It Down",
            "description": "helm install fails — Chart.lock is missing.",
            "objective": "Run `helm dependency update` to generate Chart.lock and download charts/",
            "xp": 200,
            "difficulty": "intermediate",
            "expected_time": "10m",
            "concepts": [
              "Chart.lock",
              "helm dependency update",
              "charts/ directory"
            ],
            "module": "module-6-dependencies",
            "level": "level-1-missing-lock"
          }
        },
        {
          "id": "module-6-dependencies/level-2-dep-not-updated",
          "name": "level-2-dep-not-updated",
          "path": "modules/module-6-dependencies/level-2-dep-not-updated",
          "mission": {
            "name": "Stale Dependencies",
            "description": "Chart.yaml updated with new dependency version but Chart.lock not regenerated.",
            "objective": "`helm dependency update` to sync lock with Chart.yaml",
            "xp": 200,
            "difficulty": "intermediate",
            "expected_time": "10m",
            "concepts": [
              "Chart.yaml vs Chart.lock",
              "dependency pinning"
            ],
            "module": "module-6-dependencies",
            "level": "level-2-dep-not-updated"
          }
        },
        {
          "id": "module-6-dependencies/level-3-wrong-version-range",
          "name": "level-3-wrong-version-range",
          "path": "modules/module-6-dependencies/level-3-wrong-version-range",
          "mission": {
            "name": "Version Constraint",
            "description": "Dependency version constraint doesn't match any available version.",
            "objective": "Correct version to available range (e.g., `\"~17.0.0\"`)",
            "xp": 250,
            "difficulty": "intermediate",
            "expected_time": "15m",
            "concepts": [
              "semver constraints",
              "~",
              "^",
              ">=",
              "version ranges"
            ],
            "module": "module-6-dependencies",
            "level": "level-3-wrong-version-range"
          }
        },
        {
          "id": "module-6-dependencies/level-4-alias-conflict",
          "name": "level-4-alias-conflict",
          "path": "modules/module-6-dependencies/level-4-alias-conflict",
          "mission": {
            "name": "Name Collision",
            "description": "Two dependencies with same name — one needs an alias.",
            "objective": "Add `alias: postgresql-replica` to second dependency",
            "xp": 250,
            "difficulty": "intermediate",
            "expected_time": "15m",
            "concepts": [
              "alias field",
              "multiple instances of same chart"
            ],
            "module": "module-6-dependencies",
            "level": "level-4-alias-conflict"
          }
        },
        {
          "id": "module-6-dependencies/level-5-subchart-values",
          "name": "level-5-subchart-values",
          "path": "modules/module-6-dependencies/level-5-subchart-values",
          "mission": {
            "name": "Pass It Down",
            "description": "Subchart (postgresql) has wrong password — values not passed correctly.",
            "objective": "Scope values under the subchart name: `postgresql:\\n  auth:\\n    password: mypass`",
            "xp": 300,
            "difficulty": "advanced",
            "expected_time": "20m",
            "concepts": [
              "subchart value scoping",
              "values passthrough"
            ],
            "module": "module-6-dependencies",
            "level": "level-5-subchart-values"
          }
        },
        {
          "id": "module-6-dependencies/level-6-global-values",
          "name": "level-6-global-values",
          "path": "modules/module-6-dependencies/level-6-global-values",
          "mission": {
            "name": "Share With Everyone",
            "description": "Multiple subcharts need same cluster name — must use global values.",
            "objective": "Use `global.clusterName` — accessible in all subcharts via `.Values.global`",
            "xp": 300,
            "difficulty": "advanced",
            "expected_time": "20m",
            "concepts": [
              "global values",
              ".Values.global",
              "cross-subchart sharing"
            ],
            "module": "module-6-dependencies",
            "level": "level-6-global-values"
          }
        },
        {
          "id": "module-6-dependencies/level-7-condition-enable",
          "name": "level-7-condition-enable",
          "path": "modules/module-6-dependencies/level-7-condition-enable",
          "mission": {
            "name": "Optional Component",
            "description": "Redis subchart deploys even when caching is disabled.",
            "objective": "Add `condition: redis.enabled` to dependency; `redis.enabled: false` in values",
            "xp": 250,
            "difficulty": "intermediate",
            "expected_time": "15m",
            "concepts": [
              "condition field",
              "optional dependencies",
              "tags"
            ],
            "module": "module-6-dependencies",
            "level": "level-7-condition-enable"
          }
        },
        {
          "id": "module-6-dependencies/level-8-tags-grouping",
          "name": "level-8-tags-grouping",
          "path": "modules/module-6-dependencies/level-8-tags-grouping",
          "mission": {
            "name": "Group Deploy",
            "description": "Player wants to enable/disable a group of monitoring subcharts together.",
            "objective": "Add `tags: [monitoring]` to each; use `tags.monitoring: false` in values",
            "xp": 300,
            "difficulty": "advanced",
            "expected_time": "20m",
            "concepts": [
              "tags field",
              "subchart groups",
              "batch enable/disable"
            ],
            "module": "module-6-dependencies",
            "level": "level-8-tags-grouping"
          }
        },
        {
          "id": "module-6-dependencies/level-9-repo-not-added",
          "name": "level-9-repo-not-added",
          "path": "modules/module-6-dependencies/level-9-repo-not-added",
          "mission": {
            "name": "Where's the Repo?",
            "description": "`helm dependency update` fails — repository not added.",
            "objective": "`helm repo add bitnami https://charts.bitnami.com/bitnami`",
            "xp": 200,
            "difficulty": "intermediate",
            "expected_time": "10m",
            "concepts": [
              "helm repo add",
              "repository management",
              "helm repo list"
            ],
            "module": "module-6-dependencies",
            "level": "level-9-repo-not-added"
          }
        },
        {
          "id": "module-6-dependencies/level-10-oci-dependency",
          "name": "level-10-oci-dependency",
          "path": "modules/module-6-dependencies/level-10-oci-dependency",
          "mission": {
            "name": "OCI Repository",
            "description": "Dependency uses `oci://` protocol — requires different auth/syntax.",
            "objective": "Correct OCI URL format, handle authentication",
            "xp": 300,
            "difficulty": "advanced",
            "expected_time": "20m",
            "concepts": [
              "OCI registries",
              "oci:// scheme",
              "helm OCI support"
            ],
            "module": "module-6-dependencies",
            "level": "level-10-oci-dependency"
          }
        },
        {
          "id": "module-6-dependencies/level-11-deep-override",
          "name": "level-11-deep-override",
          "path": "modules/module-6-dependencies/level-11-deep-override",
          "mission": {
            "name": "Two Levels Deep",
            "description": "Values override for a sub-subchart (dependency of a dependency) not reaching target.",
            "objective": "Understand Helm value scoping; use global or restructure",
            "xp": 300,
            "difficulty": "advanced",
            "expected_time": "20m",
            "concepts": [
              "nested subchart values",
              "value inheritance limitations"
            ],
            "module": "module-6-dependencies",
            "level": "level-11-deep-override"
          }
        },
        {
          "id": "module-6-dependencies/level-12-charts-dir",
          "name": "level-12-charts-dir",
          "path": "modules/module-6-dependencies/level-12-charts-dir",
          "mission": {
            "name": "Local vs Remote",
            "description": "Development using local chart in charts/ directory — path not resolving.",
            "objective": "Correct relative path for local chart dependency",
            "xp": 250,
            "difficulty": "intermediate",
            "expected_time": "15m",
            "concepts": [
              "file:// dependencies",
              "local chart development",
              "path resolution"
            ],
            "module": "module-6-dependencies",
            "level": "level-12-charts-dir"
          }
        },
        {
          "id": "module-6-dependencies/level-13-dep-hooks",
          "name": "level-13-dep-hooks",
          "path": "modules/module-6-dependencies/level-13-dep-hooks",
          "mission": {
            "name": "Hooks in Subcharts",
            "description": "Subchart has a pre-install hook that fails — blocks parent chart install.",
            "objective": "Fix the hook script, or disable subchart hooks with --no-hooks",
            "xp": 350,
            "difficulty": "advanced",
            "expected_time": "25m",
            "concepts": [
              "subchart hooks",
              "hook propagation",
              "--no-hooks flag"
            ],
            "module": "module-6-dependencies",
            "level": "level-13-dep-hooks"
          }
        }
      ]
    },
    {
      "name": "module-7-hooks",
      "levels": [
        {
          "id": "module-7-hooks/level-1-pre-install-fail",
          "name": "level-1-pre-install-fail",
          "path": "modules/module-7-hooks/level-1-pre-install-fail",
          "mission": {
            "name": "Before We Begin",
            "description": "pre-install hook Job fails — blocks entire release.",
            "objective": "Fix DB host in hook Job spec",
            "xp": 250,
            "difficulty": "intermediate",
            "expected_time": "15m",
            "concepts": [
              "pre-install hook",
              "Job hooks",
              "hook failure"
            ],
            "module": "module-7-hooks",
            "level": "level-1-pre-install-fail"
          }
        },
        {
          "id": "module-7-hooks/level-2-post-install-timeout",
          "name": "level-2-post-install-timeout",
          "path": "modules/module-7-hooks/level-2-post-install-timeout",
          "mission": {
            "name": "Hook Timed Out",
            "description": "post-install hook Job times out — Helm marks release failed.",
            "objective": "Add `activeDeadlineSeconds: 60` to Job spec",
            "xp": 250,
            "difficulty": "intermediate",
            "expected_time": "15m",
            "concepts": [
              "activeDeadlineSeconds",
              "hook timeout",
              "Job completion"
            ],
            "module": "module-7-hooks",
            "level": "level-2-post-install-timeout"
          }
        },
        {
          "id": "module-7-hooks/level-3-deletion-policy",
          "name": "level-3-deletion-policy",
          "path": "modules/module-7-hooks/level-3-deletion-policy",
          "mission": {
            "name": "Clean Up After Yourself",
            "description": "Hook Jobs accumulate after each upgrade — cluster fills up.",
            "objective": "Add `\"helm.sh/hook-delete-policy\": \"hook-succeeded\"` annotation",
            "xp": 250,
            "difficulty": "intermediate",
            "expected_time": "15m",
            "concepts": [
              "hook-delete-policy",
              "hook-succeeded",
              "before-hook-creation"
            ],
            "module": "module-7-hooks",
            "level": "level-3-deletion-policy"
          }
        },
        {
          "id": "module-7-hooks/level-4-hook-weight",
          "name": "level-4-hook-weight",
          "path": "modules/module-7-hooks/level-4-hook-weight",
          "mission": {
            "name": "Order Matters",
            "description": "Two pre-install hooks run in wrong order (schema migration before DB creation).",
            "objective": "Set weights: DB creation hook weight -1, migration weight 0",
            "xp": 300,
            "difficulty": "advanced",
            "expected_time": "20m",
            "concepts": [
              "hook weight",
              "execution ordering",
              "negative weights"
            ],
            "module": "module-7-hooks",
            "level": "level-4-hook-weight"
          }
        },
        {
          "id": "module-7-hooks/level-5-pre-upgrade-migration",
          "name": "level-5-pre-upgrade-migration",
          "path": "modules/module-7-hooks/level-5-pre-upgrade-migration",
          "mission": {
            "name": "Migrate Before Upgrade",
            "description": "App upgrade requires DB schema migration — it must run before new pods start.",
            "objective": "Change hook type to pre-upgrade",
            "xp": 350,
            "difficulty": "advanced",
            "expected_time": "25m",
            "concepts": [
              "pre-upgrade vs post-upgrade hooks",
              "migration ordering"
            ],
            "module": "module-7-hooks",
            "level": "level-5-pre-upgrade-migration"
          }
        },
        {
          "id": "module-7-hooks/level-6-post-delete-cleanup",
          "name": "level-6-post-delete-cleanup",
          "path": "modules/module-7-hooks/level-6-post-delete-cleanup",
          "mission": {
            "name": "Leave No Trace",
            "description": "Uninstalling the chart leaves orphaned PVCs — post-delete hook should clean them.",
            "objective": "Add post-delete hook Job that deletes PVCs",
            "xp": 300,
            "difficulty": "advanced",
            "expected_time": "20m",
            "concepts": [
              "post-delete hook",
              "cleanup hooks",
              "PVC management"
            ],
            "module": "module-7-hooks",
            "level": "level-6-post-delete-cleanup"
          }
        },
        {
          "id": "module-7-hooks/level-7-hook-leftover",
          "name": "level-7-hook-leftover",
          "path": "modules/module-7-hooks/level-7-hook-leftover",
          "mission": {
            "name": "Old Hook Blocking",
            "description": "Upgrade fails because old hook Job still exists (from previous run).",
            "objective": "Manually delete the old hook Job, or change delete policy",
            "xp": 300,
            "difficulty": "advanced",
            "expected_time": "20m",
            "concepts": [
              "before-hook-creation",
              "stale hooks",
              "manual cleanup"
            ],
            "module": "module-7-hooks",
            "level": "level-7-hook-leftover"
          }
        },
        {
          "id": "module-7-hooks/level-8-test-hook",
          "name": "level-8-test-hook",
          "path": "modules/module-7-hooks/level-8-test-hook",
          "mission": {
            "name": "Test Your Work",
            "description": "helm test fails — test pod checks wrong URL.",
            "objective": "Fix URL path in test template",
            "xp": 250,
            "difficulty": "intermediate",
            "expected_time": "15m",
            "concepts": [
              "test hook",
              "helm.sh/hook: test",
              "validation tests"
            ],
            "module": "module-7-hooks",
            "level": "level-8-test-hook"
          }
        },
        {
          "id": "module-7-hooks/level-9-hook-rbac",
          "name": "level-9-hook-rbac",
          "path": "modules/module-7-hooks/level-9-hook-rbac",
          "mission": {
            "name": "Hook Needs Permission",
            "description": "Hook Job fails with RBAC error — needs permission to list Pods.",
            "objective": "Create ServiceAccount + Role + RoleBinding for hook, assign to Job",
            "xp": 300,
            "difficulty": "advanced",
            "expected_time": "20m",
            "concepts": [
              "hook RBAC",
              "ServiceAccount for Jobs",
              "least privilege"
            ],
            "module": "module-7-hooks",
            "level": "level-9-hook-rbac"
          }
        },
        {
          "id": "module-7-hooks/level-10-hook-order-complex",
          "name": "level-10-hook-order-complex",
          "path": "modules/module-7-hooks/level-10-hook-order-complex",
          "mission": {
            "name": "Orchestra of Hooks",
            "description": "4 hooks (2 pre-install, 2 post-install) must run in specific order.",
            "objective": "Assign weights -2, -1, 1, 2 to enforce correct order",
            "xp": 350,
            "difficulty": "advanced",
            "expected_time": "25m",
            "concepts": [
              "hook orchestration",
              "complex weight schemes",
              "hook dependencies"
            ],
            "module": "module-7-hooks",
            "level": "level-10-hook-order-complex"
          }
        }
      ]
    },
    {
      "name": "module-8-security",
      "levels": [
        {
          "id": "module-8-security/level-1-secret-in-values",
          "name": "level-1-secret-in-values",
          "path": "modules/module-8-security/level-1-secret-in-values",
          "mission": {
            "name": "Secret's Not a Secret",
            "description": "Plaintext password in values.yaml committed to git.",
            "objective": "Remove from values.yaml; use `--set` for secrets or external-secrets",
            "xp": 250,
            "difficulty": "intermediate",
            "expected_time": "15m",
            "concepts": [
              "secret management",
              "values.yaml in git",
              "--set for secrets"
            ],
            "module": "module-8-security",
            "level": "level-1-secret-in-values"
          }
        },
        {
          "id": "module-8-security/level-2-rbac-for-helm",
          "name": "level-2-rbac-for-helm",
          "path": "modules/module-8-security/level-2-rbac-for-helm",
          "mission": {
            "name": "Helm Needs RBAC",
            "description": "Helm deploy fails — ServiceAccount lacks permission to create Deployments.",
            "objective": "Create ClusterRole with required permissions, bind to ServiceAccount",
            "xp": 300,
            "difficulty": "advanced",
            "expected_time": "20m",
            "concepts": [
              "Helm RBAC",
              "ServiceAccount for Helm",
              "ClusterRole"
            ],
            "module": "module-8-security",
            "level": "level-2-rbac-for-helm"
          }
        },
        {
          "id": "module-8-security/level-3-network-policy",
          "name": "level-3-network-policy",
          "path": "modules/module-8-security/level-3-network-policy",
          "mission": {
            "name": "Block the Traffic",
            "description": "Chart deploys NetworkPolicy but it blocks traffic it shouldn't.",
            "objective": "Add ingress rule for health check probe source",
            "xp": 300,
            "difficulty": "advanced",
            "expected_time": "20m",
            "concepts": [
              "NetworkPolicy in charts",
              "pod selector",
              "ingress rules"
            ],
            "module": "module-8-security",
            "level": "level-3-network-policy"
          }
        },
        {
          "id": "module-8-security/level-4-security-context",
          "name": "level-4-security-context",
          "path": "modules/module-8-security/level-4-security-context",
          "mission": {
            "name": "Run As Who?",
            "description": "Pod fails to start — security context requires non-root but image runs as root.",
            "objective": "Either change securityContext or use image that supports non-root",
            "xp": 250,
            "difficulty": "intermediate",
            "expected_time": "15m",
            "concepts": [
              "securityContext",
              "runAsNonRoot",
              "allowPrivilegeEscalation"
            ],
            "module": "module-8-security",
            "level": "level-4-security-context"
          }
        },
        {
          "id": "module-8-security/level-5-image-pull-secret",
          "name": "level-5-image-pull-secret",
          "path": "modules/module-8-security/level-5-image-pull-secret",
          "mission": {
            "name": "Private Registry Auth",
            "description": "Pod fails with ImagePullBackOff from private registry.",
            "objective": "Create docker-registry Secret, set imagePullSecrets in values",
            "xp": 250,
            "difficulty": "intermediate",
            "expected_time": "15m",
            "concepts": [
              "imagePullSecrets",
              "docker-registry secrets",
              "private registries"
            ],
            "module": "module-8-security",
            "level": "level-5-image-pull-secret"
          }
        },
        {
          "id": "module-8-security/level-6-lint-errors",
          "name": "level-6-lint-errors",
          "path": "modules/module-8-security/level-6-lint-errors",
          "mission": {
            "name": "Lint Police",
            "description": "Chart has 4 lint errors — fix all of them.",
            "objective": "Fix all lint errors per helm lint output",
            "xp": 200,
            "difficulty": "intermediate",
            "expected_time": "10m",
            "concepts": [
              "helm lint",
              "best practices",
              "linting in CI"
            ],
            "module": "module-8-security",
            "level": "level-6-lint-errors"
          }
        },
        {
          "id": "module-8-security/level-7-deprecated-api",
          "name": "level-7-deprecated-api",
          "path": "modules/module-8-security/level-7-deprecated-api",
          "mission": {
            "name": "API Graveyard",
            "description": "Chart uses `extensions/v1beta1` Deployment — removed in Kubernetes 1.16+.",
            "objective": "Change to `apiVersion: apps/v1`, add required selector field",
            "xp": 300,
            "difficulty": "advanced",
            "expected_time": "20m",
            "concepts": [
              "deprecated API versions",
              "API group migration",
              "version skew"
            ],
            "module": "module-8-security",
            "level": "level-7-deprecated-api"
          }
        },
        {
          "id": "module-8-security/level-8-resource-quotas",
          "name": "level-8-resource-quotas",
          "path": "modules/module-8-security/level-8-resource-quotas",
          "mission": {
            "name": "Quota Exceeded",
            "description": "Namespace has ResourceQuota — chart doesn't set requests, install rejected.",
            "objective": "Add resources.requests.cpu and resources.requests.memory to values",
            "xp": 300,
            "difficulty": "advanced",
            "expected_time": "20m",
            "concepts": [
              "ResourceQuota",
              "requests required",
              "quota enforcement"
            ],
            "module": "module-8-security",
            "level": "level-8-resource-quotas"
          }
        },
        {
          "id": "module-8-security/level-9-external-secrets",
          "name": "level-9-external-secrets",
          "path": "modules/module-8-security/level-9-external-secrets",
          "mission": {
            "name": "External Secret Store",
            "description": "Chart should pull secrets from external-secrets operator, not bake them in.",
            "objective": "Change to ExternalSecret resource referencing secret store",
            "xp": 350,
            "difficulty": "advanced",
            "expected_time": "25m",
            "concepts": [
              "ExternalSecret operator",
              "secret store references",
              "external-secrets.io"
            ],
            "module": "module-8-security",
            "level": "level-9-external-secrets"
          }
        },
        {
          "id": "module-8-security/level-10-chart-signing",
          "name": "level-10-chart-signing",
          "path": "modules/module-8-security/level-10-chart-signing",
          "mission": {
            "name": "Trust But Verify",
            "description": "Unsigned chart from repository — must verify provenance.",
            "objective": "Generate keypair, sign chart, verify with --verify flag",
            "xp": 350,
            "difficulty": "advanced",
            "expected_time": "25m",
            "concepts": [
              "helm sign",
              "helm verify",
              "provenance files",
              "GPG in Helm"
            ],
            "module": "module-8-security",
            "level": "level-10-chart-signing"
          }
        }
      ]
    },
    {
      "name": "module-9-advanced",
      "levels": [
        {
          "id": "module-9-advanced/level-1-library-chart-create",
          "name": "level-1-library-chart-create",
          "path": "modules/module-9-advanced/level-1-library-chart-create",
          "mission": {
            "name": "Build the Foundation",
            "description": "Repeated label blocks across 3 charts — extract to library chart.",
            "objective": "Create library chart with shared helpers, add as dependency",
            "xp": 300,
            "difficulty": "advanced",
            "expected_time": "20m",
            "concepts": [
              "library chart type",
              "type: library in Chart.yaml",
              "shared helpers"
            ],
            "module": "module-9-advanced",
            "level": "level-1-library-chart-create"
          }
        },
        {
          "id": "module-9-advanced/level-2-library-chart-use",
          "name": "level-2-library-chart-use",
          "path": "modules/module-9-advanced/level-2-library-chart-use",
          "mission": {
            "name": "Stand on Shoulders",
            "description": "Application chart uses library chart but include path wrong.",
            "objective": "Correct the include name to match library's define",
            "xp": 300,
            "difficulty": "advanced",
            "expected_time": "20m",
            "concepts": [
              "library chart consumption",
              "include naming",
              "define naming"
            ],
            "module": "module-9-advanced",
            "level": "level-2-library-chart-use"
          }
        },
        {
          "id": "module-9-advanced/level-3-oci-registry",
          "name": "level-3-oci-registry",
          "path": "modules/module-9-advanced/level-3-oci-registry",
          "mission": {
            "name": "Push and Pull",
            "description": "Chart must be pushed to OCI registry and pulled back.",
            "objective": "Correct OCI URL: `oci://registry.example.com/charts`",
            "xp": 350,
            "difficulty": "advanced",
            "expected_time": "25m",
            "concepts": [
              "OCI support",
              "helm push",
              "helm pull from OCI",
              "registry login"
            ],
            "module": "module-9-advanced",
            "level": "level-3-oci-registry"
          }
        },
        {
          "id": "module-9-advanced/level-4-helmfile",
          "name": "level-4-helmfile",
          "path": "modules/module-9-advanced/level-4-helmfile",
          "mission": {
            "name": "Helmfile Harmony",
            "description": "helmfile.yaml deploys 3 releases — one has wrong values file path.",
            "objective": "Correct the path in helmfile.yaml",
            "xp": 350,
            "difficulty": "advanced",
            "expected_time": "25m",
            "concepts": [
              "helmfile",
              "multi-release management",
              "environment files"
            ],
            "module": "module-9-advanced",
            "level": "level-4-helmfile"
          }
        },
        {
          "id": "module-9-advanced/level-5-helm-plugin",
          "name": "level-5-helm-plugin",
          "path": "modules/module-9-advanced/level-5-helm-plugin",
          "mission": {
            "name": "Extend Helm",
            "description": "CI script uses `helm diff` plugin but it's not installed.",
            "objective": "`helm plugin install https://github.com/databus23/helm-diff`",
            "xp": 300,
            "difficulty": "advanced",
            "expected_time": "20m",
            "concepts": [
              "helm plugins",
              "helm-diff",
              "plugin management"
            ],
            "module": "module-9-advanced",
            "level": "level-5-helm-plugin"
          }
        },
        {
          "id": "module-9-advanced/level-6-post-renderer",
          "name": "level-6-post-renderer",
          "path": "modules/module-9-advanced/level-6-post-renderer",
          "mission": {
            "name": "After the Render",
            "description": "Chart needs kustomize patches applied after Helm render.",
            "objective": "Create kustomization.yaml with required patches",
            "xp": 400,
            "difficulty": "expert",
            "expected_time": "30m",
            "concepts": [
              "post-renderer",
              "kustomize as post-renderer",
              "extending Helm"
            ],
            "module": "module-9-advanced",
            "level": "level-6-post-renderer"
          }
        },
        {
          "id": "module-9-advanced/level-7-chartmuseum",
          "name": "level-7-chartmuseum",
          "path": "modules/module-9-advanced/level-7-chartmuseum",
          "mission": {
            "name": "Your Own Repository",
            "description": "ChartMuseum is running but helm push fails — auth wrong.",
            "objective": "Add credentials to push command",
            "xp": 350,
            "difficulty": "advanced",
            "expected_time": "25m",
            "concepts": [
              "ChartMuseum",
              "private chart repositories",
              "helm-push plugin"
            ],
            "module": "module-9-advanced",
            "level": "level-7-chartmuseum"
          }
        },
        {
          "id": "module-9-advanced/level-8-kustomize-helm",
          "name": "level-8-kustomize-helm",
          "path": "modules/module-9-advanced/level-8-kustomize-helm",
          "mission": {
            "name": "Kustomize Meets Helm",
            "description": "Kustomize inflates Helm chart but values file path wrong.",
            "objective": "Correct path, ensure kustomize can locate values",
            "xp": 400,
            "difficulty": "expert",
            "expected_time": "30m",
            "concepts": [
              "kustomize helmCharts generator",
              "valuesFile",
              "kustomize + helm"
            ],
            "module": "module-9-advanced",
            "level": "level-8-kustomize-helm"
          }
        },
        {
          "id": "module-9-advanced/level-9-argocd-helm",
          "name": "level-9-argocd-helm",
          "path": "modules/module-9-advanced/level-9-argocd-helm",
          "mission": {
            "name": "GitOps Helm",
            "description": "ArgoCD Application using Helm — custom values not applying.",
            "objective": "Correct path to values file relative to chart root in git",
            "xp": 400,
            "difficulty": "expert",
            "expected_time": "30m",
            "concepts": [
              "ArgoCD Helm support",
              "valueFiles",
              "helm.parameters"
            ],
            "module": "module-9-advanced",
            "level": "level-9-argocd-helm"
          }
        },
        {
          "id": "module-9-advanced/level-10-umbrella-chart",
          "name": "level-10-umbrella-chart",
          "path": "modules/module-9-advanced/level-10-umbrella-chart",
          "mission": {
            "name": "The Big Picture",
            "description": "Umbrella chart orchestrating 5 microservices — one subchart fails and blocks all.",
            "objective": "Fix subchart template error; understand umbrella chart failure modes",
            "xp": 450,
            "difficulty": "expert",
            "expected_time": "35m",
            "concepts": [
              "umbrella charts",
              "chart composition",
              "partial failure handling"
            ],
            "module": "module-9-advanced",
            "level": "level-10-umbrella-chart"
          }
        }
      ]
    },
    {
      "name": "module-10-wargames",
      "levels": [
        {
          "id": "module-10-wargames/level-1-multi-tier-failure",
          "name": "level-1-multi-tier-failure",
          "path": "modules/module-10-wargames/level-1-multi-tier-failure",
          "mission": {
            "name": "Full Stack Down",
            "description": "3-tier app (frontend/backend/database) fails on install. Database hook fails, backend CrashLoops, frontend has wrong backend URL.",
            "objective": "Fix in dependency order: database hook → backend env → frontend config",
            "xp": 400,
            "difficulty": "expert",
            "expected_time": "30m",
            "concepts": [
              "debugging multiple failures",
              "dependency order",
              "systematic approach"
            ],
            "module": "module-10-wargames",
            "level": "level-1-multi-tier-failure"
          }
        },
        {
          "id": "module-10-wargames/level-2-blue-green",
          "name": "level-2-blue-green",
          "path": "modules/module-10-wargames/level-2-blue-green",
          "mission": {
            "name": "Blue Green Deploy",
            "description": "Implement blue/green deployment with Helm using two releases and Service selector switch.",
            "objective": "Helm upgrade to switch Service selector to green",
            "xp": 400,
            "difficulty": "expert",
            "expected_time": "30m",
            "concepts": [
              "blue/green patterns",
              "selector switching",
              "zero-downtime"
            ],
            "module": "module-10-wargames",
            "level": "level-2-blue-green"
          }
        },
        {
          "id": "module-10-wargames/level-3-canary",
          "name": "level-3-canary",
          "path": "modules/module-10-wargames/level-3-canary",
          "mission": {
            "name": "Canary in the Coalmine",
            "description": "Canary deployment where 10% traffic should go to new version — weight wrong.",
            "objective": "Adjust replica counts to achieve ~10% canary split",
            "xp": 400,
            "difficulty": "expert",
            "expected_time": "30m",
            "concepts": [
              "canary deployment",
              "replica-based traffic splitting",
              "Helm values for canary"
            ],
            "module": "module-10-wargames",
            "level": "level-3-canary"
          }
        },
        {
          "id": "module-10-wargames/level-4-cross-namespace",
          "name": "level-4-cross-namespace",
          "path": "modules/module-10-wargames/level-4-cross-namespace",
          "mission": {
            "name": "Crossing the Aisle",
            "description": "Service in namespace A needs to call Service in namespace B — DNS not working.",
            "objective": "Change to `backend-svc.namespace-b.svc.cluster.local` via chart values",
            "xp": 400,
            "difficulty": "expert",
            "expected_time": "30m",
            "concepts": [
              "cross-namespace DNS",
              "FQDN",
              "Kubernetes DNS patterns"
            ],
            "module": "module-10-wargames",
            "level": "level-4-cross-namespace"
          }
        },
        {
          "id": "module-10-wargames/level-5-wrong-image-prod",
          "name": "level-5-wrong-image-prod",
          "path": "modules/module-10-wargames/level-5-wrong-image-prod",
          "mission": {
            "name": "Wrong Image in Production",
            "description": "Prod incident — wrong image tag deployed. Production environment has wrong values override.",
            "objective": "Emergency upgrade with correct tag from production values file",
            "xp": 450,
            "difficulty": "expert",
            "expected_time": "35m",
            "concepts": [
              "environment separation",
              "production incidents",
              "emergency upgrades"
            ],
            "module": "module-10-wargames",
            "level": "level-5-wrong-image-prod"
          }
        },
        {
          "id": "module-10-wargames/level-6-resource-exhaustion",
          "name": "level-6-resource-exhaustion",
          "path": "modules/module-10-wargames/level-6-resource-exhaustion",
          "mission": {
            "name": "Out of Resources",
            "description": "Bad limits causing node resource exhaustion — other pods evicted.",
            "objective": "Add appropriate resource limits to chart, upgrade all affected releases",
            "xp": 450,
            "difficulty": "expert",
            "expected_time": "35m",
            "concepts": [
              "resource exhaustion",
              "limits vs requests",
              "cluster stability"
            ],
            "module": "module-10-wargames",
            "level": "level-6-resource-exhaustion"
          }
        },
        {
          "id": "module-10-wargames/level-7-multi-env-pipeline",
          "name": "level-7-multi-env-pipeline",
          "path": "modules/module-10-wargames/level-7-multi-env-pipeline",
          "mission": {
            "name": "Pipeline Breakdown",
            "description": "Helmfile pipeline promotes dev→staging→prod — staging values file missing.",
            "objective": "Add staging environment to helmfile.yaml with correct values",
            "xp": 450,
            "difficulty": "expert",
            "expected_time": "35m",
            "concepts": [
              "helmfile environments",
              "promotion pipeline",
              "environment-specific config"
            ],
            "module": "module-10-wargames",
            "level": "level-7-multi-env-pipeline"
          }
        },
        {
          "id": "module-10-wargames/level-8-cicd-upgrade",
          "name": "level-8-cicd-upgrade",
          "path": "modules/module-10-wargames/level-8-cicd-upgrade",
          "mission": {
            "name": "CI/CD Upgrade Crisis",
            "description": "CI/CD Helm upgrade script fails at step 3 of 5 — remaining steps skipped.",
            "objective": "Add proper error handling and rollback logic to upgrade script",
            "xp": 450,
            "difficulty": "expert",
            "expected_time": "10m",
            "concepts": [
              "CI/CD error handling",
              "rollback on failure",
              "deployment automation"
            ],
            "module": "module-10-wargames",
            "level": "level-8-cicd-upgrade"
          }
        },
        {
          "id": "module-10-wargames/level-9-repo-maintenance",
          "name": "level-9-repo-maintenance",
          "path": "modules/module-10-wargames/level-9-repo-maintenance",
          "mission": {
            "name": "Keep Your Repo Clean",
            "description": "Chart repository has stale/corrupted index — helm repo update fails.",
            "objective": "Regenerate index.yaml with `helm repo index`; push to repository",
            "xp": 400,
            "difficulty": "expert",
            "expected_time": "30m",
            "concepts": [
              "helm repo index",
              "repository maintenance",
              "index.yaml"
            ],
            "module": "module-10-wargames",
            "level": "level-9-repo-maintenance"
          }
        },
        {
          "id": "module-10-wargames/level-10-full-incident",
          "name": "level-10-full-incident",
          "path": "modules/module-10-wargames/level-10-full-incident",
          "mission": {
            "name": "Zero-to-Hero Incident Response",
            "description": "Final mission. Complete production incident: 4 services down, bad Helm upgrade, wrong values across 3 environments, stuck hooks, and a dependency version conflict.",
            "objective": "Systematic diagnosis and fix of all issues",
            "xp": 500,
            "difficulty": "expert",
            "expected_time": "45m",
            "concepts": [
              "all module concepts combined",
              "incident command",
              "systematic debugging"
            ],
            "module": "module-10-wargames",
            "level": "level-10-full-incident"
          }
        }
      ]
    }
  ]
}