{
  "$schema": "http://json-schema.org/draft-04/schema#",
  "id": "https://fut.sh/schemas/config.json",
  "title": "Fut configuration",
  "description": "Global Fut client, terminal, project, command, and extension configuration.",
  "type": "object",
  "additionalProperties": false,
  "properties": {
    "terminal": { "$ref": "#/definitions/terminal" },
    "alerts": { "$ref": "#/definitions/alerts" },
    "ui": { "$ref": "#/definitions/ui" },
    "extensions": {
      "type": "array",
      "description": "Trusted local extension package directories.",
      "items": { "type": "string", "minLength": 1 }
    },
    "extension": {
      "type": "object",
      "description": "Global extension configuration keyed by installed extension ID.",
      "additionalProperties": {
        "type": "object",
        "additionalProperties": { "$ref": "#/definitions/tomlValue" }
      }
    },
    "extension_commands": {
      "type": "object",
      "description": "Argument overrides keyed by extension command slug.",
      "additionalProperties": { "$ref": "#/definitions/extensionCommand" }
    },
    "trusted_commands": {
      "type": "object",
      "description": "Executable commands available from the command palette.",
      "additionalProperties": { "$ref": "#/definitions/trustedCommand" }
    },
    "projects_dir": {
      "type": "string",
      "minLength": 1,
      "description": "Fallback parent directory for project names not explicitly catalogued."
    },
    "projects": {
      "type": "object",
      "description": "Project catalog keyed by project name.",
      "patternProperties": {
        "^[A-Za-z0-9_-]{1,64}$": { "$ref": "#/definitions/project" }
      },
      "additionalProperties": false
    }
  },
  "definitions": {
    "key": {
      "type": "string",
      "pattern": "^(ctrl-[a-z]|space|enter|tab|escape|esc|up|down|.)$",
      "description": "One printable character or a named key such as ctrl-a, space, enter, tab, esc, up, or down."
    },
    "suffix": {
      "type": "string",
      "pattern": "^(prefix|ctrl-[a-z]|space|enter|tab|escape|esc|up|down|.)$",
      "description": "A key following the configured prefix. The value prefix means the prefix key itself."
    },
    "action": {
      "type": "string",
      "enum": [
        "open_command_bar",
        "open_messages",
        "open_project",
        "reload_config",
        "reload_project_config",
        "enter_copy_mode",
        "open_navigator",
        "open_agents",
        "open_left_sidebar",
        "open_right_sidebar",
        "open_tab_bar",
        "open_notifications",
        "focus_next_notification",
        "create_workspace",
        "create_tab",
        "rename_session",
        "rename_workspace",
        "rename_tab",
        "focus_next_tab",
        "focus_previous_tab",
        "focus_next_workspace",
        "focus_previous_workspace",
        "split_pane_right",
        "split_pane_down",
        "focus_next_pane",
        "focus_previous_pane",
        "focus_pane_left",
        "focus_pane_down",
        "focus_pane_up",
        "focus_pane_right",
        "focus_last_pane",
        "focus_last_tab",
        "focus_last_workspace",
        "focus_last_session",
        "focus_tab_1",
        "focus_tab_2",
        "focus_tab_3",
        "focus_tab_4",
        "focus_tab_5",
        "focus_tab_6",
        "focus_tab_7",
        "focus_tab_8",
        "focus_tab_9",
        "focus_tab_10",
        "toggle_pane_zoom",
        "close_session",
        "close_workspace",
        "close_tab",
        "close_pane",
        "detach"
      ]
    },
    "actionTarget": {
      "anyOf": [
        { "$ref": "#/definitions/action" },
        {
          "type": "string",
          "pattern": "^[A-Za-z0-9_-]+:[A-Za-z0-9_-]+$",
          "description": "An installed extension command slug."
        }
      ]
    },
    "bindings": {
      "type": "object",
      "description": "Prefix suffixes keyed by built-in action or extension command slug.",
      "additionalProperties": false,
      "patternProperties": {
        "^[A-Za-z0-9_-]+:[A-Za-z0-9_-]+$": { "$ref": "#/definitions/suffix" }
      },
      "properties": {
        "open_command_bar": { "$ref": "#/definitions/suffix" },
        "open_messages": { "$ref": "#/definitions/suffix" },
        "open_project": { "$ref": "#/definitions/suffix" },
        "reload_config": { "$ref": "#/definitions/suffix" },
        "reload_project_config": { "$ref": "#/definitions/suffix" },
        "enter_copy_mode": { "$ref": "#/definitions/suffix" },
        "open_navigator": { "$ref": "#/definitions/suffix" },
        "open_agents": { "$ref": "#/definitions/suffix" },
        "open_left_sidebar": { "$ref": "#/definitions/suffix" },
        "open_right_sidebar": { "$ref": "#/definitions/suffix" },
        "open_tab_bar": { "$ref": "#/definitions/suffix" },
        "open_notifications": { "$ref": "#/definitions/suffix" },
        "focus_next_notification": { "$ref": "#/definitions/suffix" },
        "create_workspace": { "$ref": "#/definitions/suffix" },
        "create_tab": { "$ref": "#/definitions/suffix" },
        "rename_session": { "$ref": "#/definitions/suffix" },
        "rename_workspace": { "$ref": "#/definitions/suffix" },
        "rename_tab": { "$ref": "#/definitions/suffix" },
        "focus_next_tab": { "$ref": "#/definitions/suffix" },
        "focus_previous_tab": { "$ref": "#/definitions/suffix" },
        "focus_next_workspace": { "$ref": "#/definitions/suffix" },
        "focus_previous_workspace": { "$ref": "#/definitions/suffix" },
        "split_pane_right": { "$ref": "#/definitions/suffix" },
        "split_pane_down": { "$ref": "#/definitions/suffix" },
        "focus_next_pane": { "$ref": "#/definitions/suffix" },
        "focus_previous_pane": { "$ref": "#/definitions/suffix" },
        "focus_pane_left": { "$ref": "#/definitions/suffix" },
        "focus_pane_down": { "$ref": "#/definitions/suffix" },
        "focus_pane_up": { "$ref": "#/definitions/suffix" },
        "focus_pane_right": { "$ref": "#/definitions/suffix" },
        "focus_last_pane": { "$ref": "#/definitions/suffix" },
        "focus_last_tab": { "$ref": "#/definitions/suffix" },
        "focus_last_workspace": { "$ref": "#/definitions/suffix" },
        "focus_last_session": { "$ref": "#/definitions/suffix" },
        "focus_tab_1": { "$ref": "#/definitions/suffix" },
        "focus_tab_2": { "$ref": "#/definitions/suffix" },
        "focus_tab_3": { "$ref": "#/definitions/suffix" },
        "focus_tab_4": { "$ref": "#/definitions/suffix" },
        "focus_tab_5": { "$ref": "#/definitions/suffix" },
        "focus_tab_6": { "$ref": "#/definitions/suffix" },
        "focus_tab_7": { "$ref": "#/definitions/suffix" },
        "focus_tab_8": { "$ref": "#/definitions/suffix" },
        "focus_tab_9": { "$ref": "#/definitions/suffix" },
        "focus_tab_10": { "$ref": "#/definitions/suffix" },
        "toggle_pane_zoom": { "$ref": "#/definitions/suffix" },
        "close_session": { "$ref": "#/definitions/suffix" },
        "close_workspace": { "$ref": "#/definitions/suffix" },
        "close_tab": { "$ref": "#/definitions/suffix" },
        "close_pane": { "$ref": "#/definitions/suffix" },
        "detach": { "$ref": "#/definitions/suffix" }
      }
    },
    "hotkeys": {
      "type": "object",
      "description": "Direct keys mapped to built-in actions or extension command slugs.",
      "patternProperties": {
        "^(ctrl-[a-z]|space|enter|tab|escape|esc|up|down|.)$": { "$ref": "#/definitions/actionTarget" }
      },
      "additionalProperties": false
    },
    "terminal": {
      "type": "object",
      "additionalProperties": false,
      "properties": {
        "scrollback_bytes": {
          "type": "integer",
          "minimum": 0,
          "default": 104857600,
          "description": "Maximum retained scrollback storage per terminal in bytes."
        }
      }
    },
    "alerts": {
      "type": "object",
      "additionalProperties": false,
      "properties": {
        "signal_outer_terminal": {
          "type": "boolean",
          "default": false,
          "description": "Emit one BEL when a newly unseen terminal bell arrives."
        }
      }
    },
    "ui": {
      "type": "object",
      "additionalProperties": false,
      "properties": {
        "pane_layout": { "enum": ["splits", "accordion"], "default": "splits" },
        "confirm_close": { "type": "boolean", "default": true },
        "prefix": { "$ref": "#/definitions/key" },
        "bindings": { "$ref": "#/definitions/bindings" },
        "hotkeys": { "$ref": "#/definitions/hotkeys" },
        "icons": { "$ref": "#/definitions/icons" },
        "spinner": { "$ref": "#/definitions/spinner" },
        "styles": { "$ref": "#/definitions/styles" },
        "tab_bar": { "$ref": "#/definitions/tabBar" },
        "sidebar": { "$ref": "#/definitions/sidebar" }
      }
    },
    "icons": {
      "type": "object",
      "additionalProperties": false,
      "properties": {
        "preset": { "enum": ["ascii", "unicode", "nerd_font"], "default": "unicode" },
        "current": { "type": "string" },
        "closing": { "type": "string" },
        "overflow": { "type": "string" },
        "workspace": { "type": "string" },
        "tab": { "type": "string" },
        "zoom": { "type": "string" },
        "notification": { "type": "string" },
        "vertical_divider": { "type": "string" },
        "pill_left": { "type": "string" },
        "pill_right": { "type": "string" }
      }
    },
    "spinner": {
      "type": "object",
      "additionalProperties": false,
      "properties": {
        "style": { "type": "string", "default": "dots" },
        "frames": {
          "type": "array",
          "minItems": 1,
          "maxItems": 256,
          "items": { "type": "string", "minLength": 1 }
        },
        "interval": { "type": "integer", "minimum": 16, "maximum": 2000 }
      }
    },
    "semanticStyle": {
      "enum": ["normal", "muted", "session", "workspace", "tab", "pane", "current", "selected", "closing", "activity", "attention", "error", "divider", "added", "deleted"]
    },
    "color": {
      "type": "string",
      "pattern": "^(default|black|red|green|yellow|blue|magenta|cyan|gray|dark_gray|light_red|light_green|light_yellow|light_blue|light_magenta|light_cyan|white|index:(25[0-5]|2[0-4][0-9]|1?[0-9]{1,2})|#[0-9A-Fa-f]{6})$"
    },
    "modifier": {
      "enum": ["bold", "dim", "italic", "underlined", "reversed", "crossed_out"]
    },
    "style": {
      "type": "object",
      "additionalProperties": false,
      "properties": {
        "foreground": { "$ref": "#/definitions/color" },
        "background": { "$ref": "#/definitions/color" },
        "add_modifiers": { "type": "array", "items": { "$ref": "#/definitions/modifier" } },
        "remove_modifiers": { "type": "array", "items": { "$ref": "#/definitions/modifier" } }
      }
    },
    "styles": {
      "type": "object",
      "additionalProperties": false,
      "properties": {
        "normal": { "$ref": "#/definitions/style" },
        "muted": { "$ref": "#/definitions/style" },
        "session": { "$ref": "#/definitions/style" },
        "workspace": { "$ref": "#/definitions/style" },
        "tab": { "$ref": "#/definitions/style" },
        "pane": { "$ref": "#/definitions/style" },
        "current": { "$ref": "#/definitions/style" },
        "selected": { "$ref": "#/definitions/style" },
        "closing": { "$ref": "#/definitions/style" },
        "activity": { "$ref": "#/definitions/style" },
        "attention": { "$ref": "#/definitions/style" },
        "error": { "$ref": "#/definitions/style" },
        "divider": { "$ref": "#/definitions/style" },
        "added": { "$ref": "#/definitions/style" },
        "deleted": { "$ref": "#/definitions/style" }
      }
    },
    "textSegment": {
      "type": "object",
      "additionalProperties": false,
      "properties": {
        "text": { "type": "string" },
        "style": { "$ref": "#/definitions/semanticStyle" }
      },
      "required": ["text"]
    },
    "tokenSegment": {
      "type": "object",
      "additionalProperties": false,
      "properties": {
        "token": { "type": "string", "minLength": 1 },
        "style": { "$ref": "#/definitions/semanticStyle" },
        "prefix": { "type": "string" },
        "suffix": { "type": "string" },
        "max_width": { "type": "integer", "minimum": 0, "maximum": 65535 },
        "inverted": { "type": "boolean", "default": false },
        "pill": { "type": "boolean", "default": false }
      },
      "required": ["token"]
    },
    "tabsSegment": {
      "type": "object",
      "additionalProperties": false,
      "properties": {
        "component": { "enum": ["tabs"] }
      },
      "required": ["component"]
    },
    "segment": {
      "oneOf": [
        { "$ref": "#/definitions/textSegment" },
        { "$ref": "#/definitions/tokenSegment" },
        { "$ref": "#/definitions/tabsSegment" }
      ]
    },
    "segments": {
      "type": "array",
      "maxItems": 64,
      "items": { "$ref": "#/definitions/segment" }
    },
    "group": {
      "type": "object",
      "additionalProperties": false,
      "properties": {
        "segments": { "$ref": "#/definitions/segments" },
        "style": { "$ref": "#/definitions/semanticStyle" },
        "priority": { "type": "integer", "minimum": 0, "maximum": 255, "default": 100 }
      }
    },
    "tabBar": {
      "type": "object",
      "additionalProperties": false,
      "properties": {
        "position": { "enum": ["top", "bottom"], "default": "top" },
        "left": { "type": "array", "maxItems": 64, "items": { "$ref": "#/definitions/group" } },
        "center": { "type": "array", "maxItems": 64, "items": { "$ref": "#/definitions/group" } },
        "right": { "type": "array", "maxItems": 64, "items": { "$ref": "#/definitions/group" } },
        "item": {
          "type": "object",
          "additionalProperties": false,
          "properties": { "segments": { "$ref": "#/definitions/segments" } }
        }
      }
    },
    "componentSize": {
      "oneOf": [
        { "enum": ["fill"] },
        { "type": "integer", "minimum": 1, "maximum": 65535 }
      ]
    },
    "workspaceRow": {
      "type": "object",
      "additionalProperties": false,
      "properties": {
        "left": { "$ref": "#/definitions/segments" },
        "body": { "$ref": "#/definitions/segments" },
        "right": { "$ref": "#/definitions/segments" },
        "detail": { "$ref": "#/definitions/segments" }
      }
    },
    "workspaceComponent": {
      "type": "object",
      "additionalProperties": false,
      "properties": {
        "component": { "enum": ["workspaces"] },
        "size": { "$ref": "#/definitions/componentSize" },
        "header": { "$ref": "#/definitions/segments" },
        "footer": { "$ref": "#/definitions/segments" },
        "row": { "$ref": "#/definitions/workspaceRow" }
      },
      "required": ["component"]
    },
    "agentsComponent": {
      "type": "object",
      "additionalProperties": false,
      "properties": {
        "component": { "enum": ["agents"] },
        "size": { "$ref": "#/definitions/componentSize" },
        "scope": { "enum": ["tab", "workspace", "session", "global"], "default": "session" }
      },
      "required": ["component"]
    },
    "sidebarSlot": {
      "type": "object",
      "additionalProperties": false,
      "properties": {
        "width": { "type": "integer", "minimum": 4, "maximum": 80, "default": 28 },
        "display": { "enum": ["expanded", "minimized"], "default": "expanded" },
        "visibility": { "enum": ["visible", "automatic", "hidden"], "default": "automatic" },
        "components": {
          "type": "array",
          "items": {
            "oneOf": [
              { "$ref": "#/definitions/workspaceComponent" },
              { "$ref": "#/definitions/agentsComponent" }
            ]
          }
        }
      }
    },
    "sidebar": {
      "type": "object",
      "additionalProperties": false,
      "properties": {
        "left": { "$ref": "#/definitions/sidebarSlot" },
        "right": { "$ref": "#/definitions/sidebarSlot" }
      }
    },
    "popupSize": {
      "type": "object",
      "additionalProperties": false,
      "properties": {
        "width": { "type": "integer", "minimum": 4, "maximum": 65535 },
        "height": { "type": "integer", "minimum": 3, "maximum": 65535 }
      }
    },
    "trustedCommand": {
      "type": "object",
      "additionalProperties": false,
      "properties": {
        "title": { "type": "string", "minLength": 1 },
        "binding": { "$ref": "#/definitions/suffix" },
        "hotkey": { "$ref": "#/definitions/key" },
        "program": { "type": "string", "minLength": 1 },
        "args": { "type": "array", "items": { "type": "string" } },
        "size": { "$ref": "#/definitions/popupSize" },
        "activate_opened": { "type": "boolean", "default": false },
        "mode": { "enum": ["interactive", "background"], "default": "interactive" }
      },
      "required": ["title", "program"]
    },
    "extensionCommand": {
      "type": "object",
      "additionalProperties": false,
      "properties": {
        "args": { "type": "array", "items": { "type": "string" } }
      }
    },
    "project": {
      "type": "object",
      "additionalProperties": false,
      "properties": {
        "path": { "type": "string", "minLength": 1 },
        "recipe": { "type": "string", "minLength": 1 }
      },
      "required": ["path"]
    },
    "tomlValue": {
      "oneOf": [
        { "type": ["string", "number", "integer", "boolean"] },
        { "type": "array", "items": { "$ref": "#/definitions/tomlValue" } },
        { "type": "object", "additionalProperties": { "$ref": "#/definitions/tomlValue" } }
      ]
    }
  }
}