{
  "openapi": "3.1.0",
  "info": {
    "title": "Hackless Public API",
    "version": "1.0.0",
    "description": "Public REST API for Hackless challenge, leaderboard, profile, writeup, and flag submission workflows."
  },
  "servers": [
    {
      "url": "https://hackless.dev",
      "description": "Production"
    }
  ],
  "security": [
    {
      "bearerAuth": []
    },
    {
      "apiKeyAuth": []
    }
  ],
  "paths": {
    "/api/public/health": {
      "get": {
        "tags": ["Health"],
        "summary": "Health check",
        "security": [],
        "responses": {
          "200": {
            "description": "API is healthy",
            "content": {
              "application/json": {
                "schema": {
                  "type": "object",
                  "required": ["ok"],
                  "properties": {
                    "ok": { "type": "boolean", "example": true }
                  }
                }
              }
            }
          }
        }
      }
    },
    "/api/public/challenges": {
      "get": {
        "tags": ["Challenges"],
        "summary": "List challenges",
        "security": [],
        "responses": {
          "200": {
            "description": "Challenge summaries",
            "content": {
              "application/json": {
                "schema": {
                  "type": "object",
                  "required": ["challenges"],
                  "properties": {
                    "challenges": {
                      "type": "array",
                      "items": { "$ref": "#/components/schemas/ChallengeSummary" }
                    }
                  }
                }
              }
            }
          },
          "500": { "$ref": "#/components/responses/Error" }
        }
      }
    },
    "/api/public/challenges/{slug}": {
      "get": {
        "tags": ["Challenges"],
        "summary": "Get challenge by slug",
        "security": [],
        "parameters": [
          { "$ref": "#/components/parameters/Slug" }
        ],
        "responses": {
          "200": {
            "description": "Challenge detail",
            "content": {
              "application/json": {
                "schema": {
                  "type": "object",
                  "required": ["challenge"],
                  "properties": {
                    "challenge": { "$ref": "#/components/schemas/ChallengeDetail" }
                  }
                }
              }
            }
          },
          "404": { "$ref": "#/components/responses/Error" },
          "500": { "$ref": "#/components/responses/Error" }
        }
      }
    },
    "/api/public/challenges/{slug}/submit": {
      "post": {
        "tags": ["Challenges"],
        "summary": "Submit a flag",
        "parameters": [
          { "$ref": "#/components/parameters/Slug" }
        ],
        "requestBody": {
          "required": true,
          "content": {
            "application/json": {
              "schema": {
                "type": "object",
                "required": ["flag"],
                "properties": {
                  "flag": { "type": "string", "minLength": 1, "example": "hackless{example_flag}" }
                }
              }
            }
          }
        },
        "responses": {
          "200": {
            "description": "Submission accepted",
            "content": {
              "application/json": {
                "schema": {
                  "type": "object",
                  "required": ["result"],
                  "properties": {
                    "result": { "$ref": "#/components/schemas/SubmitFlagResult" }
                  }
                }
              }
            }
          },
          "400": { "$ref": "#/components/responses/Error" },
          "401": { "$ref": "#/components/responses/Error" },
          "404": { "$ref": "#/components/responses/Error" },
          "409": { "$ref": "#/components/responses/Error" },
          "500": { "$ref": "#/components/responses/Error" }
        }
      }
    },
    "/api/public/challenges/{slug}/writeups": {
      "get": {
        "tags": ["Writeups"],
        "summary": "List challenge writeups",
        "parameters": [
          { "$ref": "#/components/parameters/Slug" }
        ],
        "responses": {
          "200": {
            "description": "Challenge writeups",
            "content": {
              "application/json": {
                "schema": { "$ref": "#/components/schemas/ChallengeWriteupsResponse" }
              }
            }
          },
          "401": { "$ref": "#/components/responses/Error" },
          "403": { "$ref": "#/components/responses/Error" },
          "404": { "$ref": "#/components/responses/Error" },
          "500": { "$ref": "#/components/responses/Error" }
        }
      }
    },
    "/api/public/leaderboard": {
      "get": {
        "tags": ["Leaderboard"],
        "summary": "Get leaderboard",
        "security": [],
        "responses": {
          "200": {
            "description": "Leaderboard entries",
            "content": {
              "application/json": {
                "schema": {
                  "type": "object",
                  "required": ["leaderboard"],
                  "properties": {
                    "leaderboard": {
                      "type": "array",
                      "items": { "$ref": "#/components/schemas/LeaderboardEntry" }
                    }
                  }
                }
              }
            }
          },
          "500": { "$ref": "#/components/responses/Error" }
        }
      }
    },
    "/api/public/me": {
      "get": {
        "tags": ["Profiles"],
        "summary": "Get authenticated profile",
        "responses": {
          "200": {
            "description": "Authenticated user profile",
            "content": {
              "application/json": {
                "schema": {
                  "type": "object",
                  "required": ["profile"],
                  "properties": {
                    "profile": { "$ref": "#/components/schemas/MyProfile" }
                  }
                }
              }
            }
          },
          "401": { "$ref": "#/components/responses/Error" },
          "500": { "$ref": "#/components/responses/Error" }
        }
      }
    },
    "/api/public/profiles/{userId}": {
      "get": {
        "tags": ["Profiles"],
        "summary": "Get public profile",
        "security": [],
        "parameters": [
          {
            "name": "userId",
            "in": "path",
            "required": true,
            "schema": { "type": "string" }
          }
        ],
        "responses": {
          "200": {
            "description": "Public profile or null",
            "content": {
              "application/json": {
                "schema": {
                  "type": "object",
                  "required": ["profile"],
                  "properties": {
                    "profile": {
                      "oneOf": [
                        { "$ref": "#/components/schemas/PublicProfile" },
                        { "type": "null" }
                      ]
                    }
                  }
                }
              }
            }
          },
          "500": { "$ref": "#/components/responses/Error" }
        }
      }
    }
  },
  "components": {
    "securitySchemes": {
      "bearerAuth": {
        "type": "http",
        "scheme": "bearer",
        "description": "Hackless MCP/API key, for example Authorization: Bearer hk_..."
      },
      "apiKeyAuth": {
        "type": "apiKey",
        "in": "header",
        "name": "X-API-Key"
      }
    },
    "parameters": {
      "Slug": {
        "name": "slug",
        "in": "path",
        "required": true,
        "schema": { "type": "string" },
        "example": "cryptovault"
      }
    },
    "responses": {
      "Error": {
        "description": "Error response",
        "content": {
          "application/json": {
            "schema": { "$ref": "#/components/schemas/ErrorResponse" }
          }
        }
      }
    },
    "schemas": {
      "ErrorResponse": {
        "type": "object",
        "required": ["error"],
        "properties": {
          "error": { "type": "string" }
        }
      },
      "ChallengeDifficulty": {
        "type": "string",
        "enum": ["Easy", "Medium", "Hard", "Insane"]
      },
      "ChallengeSummary": {
        "type": "object",
        "required": ["id", "slug", "categories", "title", "description", "difficulty", "points", "hasInstance", "type", "attemptsCount", "createdAt", "solved", "solvesCount"],
        "properties": {
          "id": { "type": "string" },
          "slug": { "type": "string" },
          "categories": { "type": "array", "items": { "type": "string" } },
          "title": { "type": "string" },
          "description": { "type": "string" },
          "difficulty": { "$ref": "#/components/schemas/ChallengeDifficulty" },
          "points": { "type": "integer" },
          "fileUrl": { "type": ["string", "null"] },
          "fileName": { "type": ["string", "null"] },
          "hasInstance": { "type": "boolean" },
          "dockerPort": { "type": ["integer", "null"] },
          "type": { "type": "string", "example": "web" },
          "attemptsCount": { "type": "integer" },
          "createdAt": { "type": "string", "format": "date-time" },
          "creator": { "$ref": "#/components/schemas/ChallengeCreator" },
          "solved": { "type": "boolean" },
          "solvesCount": { "type": "integer" },
          "avgStars": { "type": ["number", "null"] }
        }
      },
      "ChallengeDetail": {
        "allOf": [
          { "$ref": "#/components/schemas/ChallengeSummary" },
          {
            "type": "object",
            "required": ["unlocked", "submittedFlag", "totalReviews"],
            "properties": {
              "unlocked": { "type": "boolean" },
              "submittedFlag": { "type": ["string", "null"] },
              "avgDifficulty": { "type": ["number", "null"] },
              "totalReviews": { "type": "integer" },
              "myReview": {
                "oneOf": [
                  { "$ref": "#/components/schemas/ChallengeReview" },
                  { "type": "null" }
                ]
              }
            }
          }
        ]
      },
      "ChallengeCreator": {
        "type": ["object", "null"],
        "properties": {
          "id": { "type": "string" },
          "name": { "type": ["string", "null"] },
          "username": { "type": ["string", "null"] }
        }
      },
      "ChallengeReview": {
        "type": "object",
        "required": ["stars", "difficulty"],
        "properties": {
          "stars": { "type": "integer", "minimum": 1, "maximum": 5 },
          "difficulty": { "type": "integer", "minimum": 1, "maximum": 10 }
        }
      },
      "SubmitFlagResult": {
        "type": "object",
        "required": ["success", "points", "newBadges"],
        "properties": {
          "success": { "type": "boolean" },
          "points": { "type": "integer" },
          "newBadges": {
            "type": "array",
            "items": { "$ref": "#/components/schemas/BadgeAward" }
          }
        }
      },
      "BadgeAward": {
        "type": "object",
        "required": ["id", "title", "icon", "image"],
        "properties": {
          "id": { "type": "string" },
          "title": { "type": "string" },
          "icon": { "type": "string" },
          "image": { "type": ["string", "null"] }
        }
      },
      "LeaderboardEntry": {
        "type": "object",
        "required": ["id", "name", "totalPoints", "totalSolves", "solves"],
        "properties": {
          "id": { "type": "string" },
          "name": { "type": "string" },
          "username": { "type": ["string", "null"] },
          "image": { "type": ["string", "null"] },
          "totalPoints": { "type": "integer" },
          "totalSolves": { "type": "integer" },
          "lastSolvedAt": { "type": ["string", "null"], "format": "date-time" },
          "solves": {
            "type": "array",
            "items": { "$ref": "#/components/schemas/LeaderboardSolve" }
          }
        }
      },
      "LeaderboardSolve": {
        "type": "object",
        "required": ["solvedAt", "points"],
        "properties": {
          "solvedAt": { "type": "string", "format": "date-time" },
          "points": { "type": "integer" }
        }
      },
      "PublicProfile": {
        "type": "object",
        "required": ["id", "name", "username", "image", "createdAt", "solvedChallenges", "createdChallenges", "badges"],
        "properties": {
          "id": { "type": "string" },
          "name": { "type": ["string", "null"] },
          "username": { "type": ["string", "null"] },
          "image": { "type": ["string", "null"] },
          "createdAt": { "type": "string", "format": "date-time" },
          "solvedChallenges": {
            "type": "array",
            "items": { "$ref": "#/components/schemas/ProfileSolve" }
          },
          "createdChallenges": {
            "type": "array",
            "items": { "$ref": "#/components/schemas/ProfileChallenge" }
          },
          "badges": {
            "type": "array",
            "items": { "$ref": "#/components/schemas/ProfileBadge" }
          },
          "rank": { "type": "integer" },
          "totalPoints": { "type": "integer" },
          "firstBloodCount": { "type": "integer" },
          "top3Count": { "type": "integer" },
          "categoryCounts": {
            "type": "object",
            "additionalProperties": { "type": "integer" }
          },
          "difficultyCounts": {
            "type": "object",
            "additionalProperties": { "type": "integer" }
          }
        }
      },
      "MyProfile": {
        "allOf": [
          { "$ref": "#/components/schemas/PublicProfile" },
          {
            "type": "object",
            "required": ["email", "twoFactorEnabled", "rank", "totalPoints", "firstBloodCount", "top3Count"],
            "properties": {
              "email": { "type": ["string", "null"], "format": "email" },
              "twoFactorEnabled": { "type": "boolean" },
              "mcpApiKeys": {
                "type": "array",
                "items": { "$ref": "#/components/schemas/McpApiKey" }
              }
            }
          }
        ]
      },
      "ProfileSolve": {
        "type": "object",
        "required": ["solvedAt", "challenge"],
        "properties": {
          "solvedAt": { "type": "string", "format": "date-time" },
          "challenge": { "$ref": "#/components/schemas/ProfileChallenge" }
        }
      },
      "ProfileChallenge": {
        "type": "object",
        "required": ["id", "title", "points", "categories", "difficulty"],
        "properties": {
          "id": { "type": "string" },
          "slug": { "type": "string" },
          "title": { "type": "string" },
          "points": { "type": "integer" },
          "categories": { "type": "array", "items": { "type": "string" } },
          "difficulty": { "$ref": "#/components/schemas/ChallengeDifficulty" },
          "createdAt": { "type": "string", "format": "date-time" }
        }
      },
      "ProfileBadge": {
        "type": "object",
        "required": ["badgeId", "awardedAt"],
        "properties": {
          "badgeId": { "type": "string" },
          "awardedAt": { "type": "string", "format": "date-time" }
        }
      },
      "McpApiKey": {
        "type": "object",
        "required": ["id", "name", "keyPrefix", "createdAt"],
        "properties": {
          "id": { "type": "string" },
          "name": { "type": "string" },
          "keyPrefix": { "type": "string" },
          "createdAt": { "type": "string", "format": "date-time" },
          "lastUsedAt": { "type": ["string", "null"], "format": "date-time" },
          "revokedAt": { "type": ["string", "null"], "format": "date-time" }
        }
      },
      "ChallengeWriteupsResponse": {
        "type": "object",
        "required": ["challenge", "writeups"],
        "properties": {
          "challenge": {
            "type": "object",
            "required": ["id", "title", "categories", "difficulty", "points"],
            "properties": {
              "id": { "type": "string" },
              "title": { "type": "string" },
              "categories": { "type": "array", "items": { "type": "string" } },
              "difficulty": { "$ref": "#/components/schemas/ChallengeDifficulty" },
              "points": { "type": "integer" }
            }
          },
          "writeups": {
            "type": "array",
            "items": { "$ref": "#/components/schemas/Writeup" }
          }
        }
      },
      "Writeup": {
        "type": "object",
        "properties": {
          "id": { "type": "string" },
          "userId": { "type": "string" },
          "challengeId": { "type": "string" },
          "title": { "type": "string" },
          "content": { "type": "string" },
          "images": { "type": "array", "items": { "type": "string" } },
          "status": { "type": "string" },
          "createdAt": { "type": "string", "format": "date-time" },
          "updatedAt": { "type": "string", "format": "date-time" },
          "user": {
            "type": "object",
            "properties": {
              "username": { "type": ["string", "null"] },
              "name": { "type": ["string", "null"] }
            }
          }
        }
      }
    }
  }
}