{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://hushspec.dev/schemas/hushspec-posture.v0.schema.json",
  "$comment": "Frozen 0.x lineage. This file is retained for documents that declare a 0.x hushspec version and is not edited after HushSpec 1.0.0; the current schema is the .v1. file with the same name (spec/versioning.md).",
  "title": "HushSpec Posture Extension v0",
  "description": "Schema for the HushSpec Posture extension. Declares a state machine for capability and budget management.",
  "type": "object",
  "required": [
    "initial",
    "states",
    "transitions"
  ],
  "additionalProperties": false,
  "properties": {
    "initial": {
      "type": "string",
      "description": "Initial state name. Must reference a key in states."
    },
    "states": {
      "type": "object",
      "description": "Named states in the posture state machine.",
      "minProperties": 1,
      "additionalProperties": {
        "$ref": "#/$defs/PostureState"
      }
    },
    "transitions": {
      "type": "array",
      "description": "Transitions between states, triggered by events.",
      "items": {
        "$ref": "#/$defs/PostureTransition"
      }
    }
  },
  "$defs": {
    "PostureState": {
      "type": "object",
      "additionalProperties": false,
      "description": "A named state in the posture state machine.",
      "properties": {
        "description": {
          "type": "string"
        },
        "capabilities": {
          "type": "array",
          "items": {
            "type": "string"
          },
          "description": "Capability identifiers available in this state. Standard values: file_access, file_write, egress, shell, tool_call, patch, custom."
        },
        "budgets": {
          "type": "object",
          "description": "Budget limits keyed by budget key. Standard keys: file_writes, egress_calls, shell_commands, tool_calls, patches, custom_calls.",
          "additionalProperties": {
            "type": "integer",
            "minimum": 0
          }
        }
      }
    },
    "PostureTransition": {
      "type": "object",
      "required": [
        "from",
        "to",
        "on"
      ],
      "additionalProperties": false,
      "description": "A transition between posture states.",
      "properties": {
        "from": {
          "type": "string",
          "description": "Source state name, or \"*\" to match any state."
        },
        "to": {
          "type": "string",
          "not": {
            "const": "*"
          },
          "description": "Target state name. Must not be \"*\"."
        },
        "on": {
          "type": "string",
          "enum": [
            "user_approval",
            "user_denial",
            "critical_violation",
            "any_violation",
            "timeout",
            "budget_exhausted",
            "pattern_match"
          ],
          "description": "Trigger that causes this transition."
        },
        "after": {
          "type": "string",
          "pattern": "^\\d+[smhd]$",
          "description": "Duration string. Required when trigger is \"timeout\". Format: <number><unit> where unit is s, m, h, or d."
        }
      },
      "if": {
        "properties": {
          "on": {
            "const": "timeout"
          }
        },
        "required": [
          "on"
        ]
      },
      "then": {
        "required": [
          "from",
          "to",
          "on",
          "after"
        ]
      }
    }
  }
}