{
  "lexicon": 1,
  "id": "sh.tangled.git.mergeCheck",
  "defs": {
    "main": {
      "type": "procedure",
      "description": "Check if a merge is possible between two branches. Performs 3-way merge check",
      "input": {
        "encoding": "application/json",
        "schema": {
          "type": "object",
          "required": ["repo", "branch", "source"],
          "properties": {
            "repo": {
              "type": "string",
              "format": "did",
              "description": "DID of Git repository"
            },
            "branch": {
              "type": "string",
              "description": "Target branch to merge into"
            },
            "source": {
              "type": "object",
              "required": ["repo", "commit"],
              "properties": {
                "repo": {
                  "type": "string",
                  "format": "did",
                  "description": "DID of source git repository"
                },
                "commit": {
                  "type": "string",
                  "description": "Head commit ID of PR to merge"
                }
              }
            }
          }
        }
      },
      "output": {
        "encoding": "application/json",
        "schema": {
          "type": "object",
          "required": ["isConflicted"],
          "properties": {
            "isConflicted": {
              "type": "boolean",
              "description": "Whether the merge has conflicts"
            },
            "conflicts": {
              "type": "array",
              "description": "List of files with merge conflicts",
              "items": {
                "type": "ref",
                "ref": "#conflictInfo"
              }
            },
            "message": {
              "type": "string",
              "description": "Additional message about the merge check"
            }
          }
        }
      },
      "errors": [
        {
          "name": "InvalidRequest",
          "description": "Invalid request parameters"
        },
        {
          "name": "RepoNotFound",
          "description": "Repo is not registered on this knot"
        },
        {
          "name": "CommitNotFound",
          "description": "Commit is not found from source Repo"
        }
      ]
    },
    "conflictInfo": {
      "type": "object",
      "required": ["filename", "reason"],
      "properties": {
        "filename": {
          "type": "string",
          "description": "Name of the conflicted file"
        },
        "reason": {
          "type": "string",
          "description": "Reason for the conflict"
        }
      }
    }
  }
}