{
	"$schema": "https://json-schema.org/draft/2020-12/schema",
	"$id": "https://ultimate-pi.local/.pi/harness/specs/plan-stack-brief.schema.json",
	"title": "PlanStackBrief",
	"type": "object",
	"additionalProperties": false,
	"required": [
		"schema_version",
		"problem_framing",
		"constraints",
		"options",
		"recommended_primary",
		"rationale"
	],
	"properties": {
		"schema_version": { "type": "string", "const": "1.0.0" },
		"problem_framing": { "type": "string", "minLength": 1 },
		"constraints": {
			"type": "array",
			"items": { "type": "string", "minLength": 1 }
		},
		"options": {
			"type": "array",
			"minItems": 1,
			"items": { "$ref": "#/$defs/stack_option" }
		},
		"recommended_primary": { "type": "string", "minLength": 1 },
		"rationale": { "type": "string", "minLength": 1 },
		"open_questions": {
			"type": "array",
			"items": { "type": "string", "minLength": 1 }
		}
	},
	"$defs": {
		"stack_option": {
			"type": "object",
			"additionalProperties": false,
			"required": [
				"name",
				"category",
				"fit_summary",
				"tradeoffs",
				"risks",
				"evidence_refs",
				"recommendation_rank"
			],
			"properties": {
				"name": { "type": "string" },
				"category": { "type": "string" },
				"fit_summary": { "type": "string" },
				"tradeoffs": {
					"type": "object",
					"required": ["pros", "cons"],
					"properties": {
						"pros": { "type": "array", "items": { "type": "string" } },
						"cons": { "type": "array", "items": { "type": "string" } }
					}
				},
				"risks": { "type": "array", "items": { "type": "string" } },
				"evidence_refs": { "type": "array", "items": { "type": "string" } },
				"recommendation_rank": { "type": "integer", "minimum": 1 }
			}
		}
	}
}