{
  "$schema": "http://json-schema.org/draft-07/schema",
  "$id": "https://nx.dev/reference/migrations-json",
  "title": "JSON schema for Nx migrations",
  "type": "object",
  "properties": {
    "$schema": {
      "type": "string"
    },
    "name": {
      "type": "string",
      "description": "Name of the migration collection."
    },
    "version": {
      "type": "string",
      "description": "Version of the migration collection."
    },
    "generators": {
      "type": "object",
      "description": "Migrations to run when users run `nx migrate`, keyed by a unique migration name.",
      "additionalProperties": {
        "$ref": "#/definitions/migration"
      }
    },
    "schematics": {
      "type": "object",
      "description": "Same as `generators`, but migrations are run as Angular Devkit schematics.",
      "additionalProperties": {
        "$ref": "#/definitions/migration"
      }
    },
    "packageJsonUpdates": {
      "type": "object",
      "description": "Groups of `package.json` dependency updates to apply when users run `nx migrate`, keyed by a unique group name.",
      "additionalProperties": {
        "$ref": "#/definitions/packageJsonUpdate"
      }
    }
  },
  "definitions": {
    "migration": {
      "type": "object",
      "properties": {
        "version": {
          "type": "string",
          "description": "Version of the package at which the migration should run. The migration runs when migrating from an installed version lower than this version to a target version equal to or greater than it."
        },
        "description": {
          "type": "string",
          "description": "Description of what the migration does, shown to users when it runs."
        },
        "implementation": {
          "type": "string",
          "description": "Path to the migration implementation file, relative to `migrations.json`. Append `#symbolName` to use a named export; otherwise, the default export is used."
        },
        "factory": {
          "type": "string",
          "description": "Alias for `implementation`."
        },
        "prompt": {
          "type": "string",
          "description": "Path to a markdown prompt file with instructions for an AI agent to perform the migration, relative to `migrations.json`. The path must stay within the directory containing `migrations.json` and point at an existing file. The prompt is handed to the agent when migrations are applied with the agentic flow enabled (e.g. `nx migrate --run-migrations --agentic`)."
        },
        "schema": {
          "type": "string",
          "description": "Path to a JSON schema for the migration options, relative to `migrations.json`. Rarely needed since migrations are run without user-provided options."
        },
        "documentation": {
          "type": "string",
          "description": "Path to a markdown doc describing the migration, relative to `migrations.json` and resolved like `implementation`/`factory`. Always supplementary; never stands in for them. Under `nx migrate --run-migrations --agentic` the resolved path is passed to the agent as extra context."
        },
        "requires": {
          "type": "object",
          "description": "Map of package names to semver ranges. The migration runs only when the installed or to-be-updated versions of these packages satisfy the ranges.",
          "additionalProperties": {
            "type": "string"
          }
        },
        "cli": {
          "type": "string",
          "enum": ["nx"],
          "description": "The CLI used to run the migration.",
          "deprecated": "No longer used. Whether a migration runs as an Nx generator or an Angular Devkit schematic is determined by the section it is defined in (`generators` or `schematics`)."
        },
        "x-repair-skip": {
          "type": "boolean",
          "description": "Exclude this migration when users run `nx repair`."
        }
      },
      "required": ["version"],
      "anyOf": [
        {
          "required": ["implementation"]
        },
        {
          "required": ["factory"]
        },
        {
          "required": ["prompt"]
        }
      ]
    },
    "packageJsonUpdate": {
      "type": "object",
      "properties": {
        "version": {
          "type": "string",
          "description": "Version of the package at which the updates should apply. The updates apply when migrating from an installed version equal to or lower than this version to a target version equal to or greater than it."
        },
        "packages": {
          "type": "object",
          "description": "Packages to update, keyed by package name.",
          "additionalProperties": {
            "$ref": "#/definitions/packageUpdate"
          }
        },
        "x-prompt": {
          "type": "string",
          "description": "Message shown to users to confirm whether to apply the updates when running `nx migrate --interactive`. When not set, the updates are applied without confirmation.",
          "deprecated": "Surfaced via `nx migrate --interactive`; this confirmation behavior will be removed in Nx v24. Use `--include` to choose which packages to migrate."
        },
        "requires": {
          "type": "object",
          "description": "Map of package names to semver ranges. The updates apply only when the installed or to-be-updated versions of these packages satisfy the ranges.",
          "additionalProperties": {
            "type": "string"
          }
        },
        "incompatibleWith": {
          "type": "object",
          "description": "Map of package names to semver ranges. The updates do not apply when the installed or to-be-updated version of any of these packages satisfies its range.",
          "additionalProperties": {
            "type": "string"
          }
        }
      },
      "required": ["version", "packages"]
    },
    "packageUpdate": {
      "type": "object",
      "properties": {
        "version": {
          "type": "string",
          "description": "Version to update the package to."
        },
        "ifPackageInstalled": {
          "type": "string",
          "description": "Only update the package if the specified package is installed."
        },
        "addToPackageJson": {
          "description": "Set to `dependencies` or `devDependencies` to add the package to the user's `package.json` in the specified section when it is not already installed.",
          "oneOf": [
            {
              "type": "boolean"
            },
            {
              "type": "string",
              "enum": ["dependencies", "devDependencies"]
            }
          ]
        },
        "alwaysAddToPackageJson": {
          "description": "Same as `addToPackageJson`, with `true` adding the package to `dependencies`. Takes precedence over `addToPackageJson` when both are set.",
          "oneOf": [
            {
              "type": "boolean"
            },
            {
              "type": "string",
              "enum": ["dependencies", "devDependencies"]
            }
          ]
        },
        "ignorePackageGroup": {
          "type": "boolean",
          "description": "Do not include updates from the package's `packageGroup` when applying this update."
        },
        "ignoreMigrations": {
          "type": "boolean",
          "description": "Do not collect and run migrations for the package when applying this update."
        }
      },
      "required": ["version"]
    }
  }
}