{
  "id": "assumption-delta",
  "role": "feature",
  "version": "1.7.0-rc.3",
  "title": "Assumption-delta architecture checkpoint",
  "description": "Rarely-firing advisory checkpoint that triggers when a phase makes something plural, optional, or chosen that used to be singular, required, or derived. Surfaces one identity-model question (promote the new general representation to primary, or add it alongside?) so a silent primary-key drift does not accumulate into a later user-facing bug. Non-blocking; fires only on a detected signal.",
  "tier": "full",
  "requires": [],
  "engines": {
    "gsd": ">=1.6.0"
  },
  "runtimeCompat": {
    "supported": [
      "*"
    ],
    "unsupported": []
  },
  "skills": [],
  "agents": [],
  "hooks": [],
  "config": {
    "workflow.assumption_delta": {
      "type": "boolean",
      "default": true,
      "description": "Enable the assumption-delta architecture checkpoint during planning. When a pluralization/optional/chosen signal is detected in the phase scope, the planner is prompted to re-ask whether the primary key / identity model still names the right thing. Advisory (non-blocking)."
    }
  },
  "steps": [],
  "contributions": [
    {
      "point": "plan:pre",
      "into": "planner",
      "fragment": {
        "path": "fragments/plan-pre.md"
      },
      "produces": [],
      "consumes": [
        "CONTEXT.md"
      ],
      "when": "workflow.assumption_delta",
      "onError": "skip"
    }
  ],
  "gates": []
}