{
  "handle": "ExtendedThinking",
  "mechanism": "Inference-time compute scaling where the model generates extended reasoning traces (potentially thousands of tokens) before producing a final answer. Unlike standard {{chain}}-of-Thought, this pattern explicitly trades latency and compute cost for accuracy by allowing the model to 'think longer'. The reasoning budget can be user-controlled or adaptive based on {{task}} complexity.",
  "gloss": "Scale inference compute via extended reasoning",
  "failure_modes": [
    "Confabulation Chains: Long reasoning traces that sound plausible but contain errors.",
    "Overthinking: Spending compute on simple problems that don't benefit.",
    "Hidden Reasoning: Model reaches conclusions via paths not shown in the trace."
  ],
  "invariants": [
    "The reasoning budget is fixed before the trace begins.",
    "A trace is produced and logged for every answer.",
    "Emitted, not certified: the trace is what the model produced, not proof of how it concluded."
  ],
  "preconditions": [
    "Complex prompt",
    "High token budget"
  ],
  "postconditions": [
    "High-accuracy answer"
  ],
  "_meta": {
    "tier": 1,
    "ring": 2,
    "supersedes": [
      "sema:ExtendedThinking#mh:SHA-256:ca3c54e46218935876ca5c993974742069fe61871fae7af38a2fef745753dc98",
      "sema:ExtendedThinking#mh:SHA-256:da3f0bf23a85cddefae39b7a83e02d95bf321356de714bdf4575b4ff07b8c4df"
    ],
    "path": [
      "Mind",
      "Reasoning"
    ]
  },
  "sema_id": "sema:ExtendedThinking#mh:SHA-256:3a9046a74fa5ecf3f06526936caf2038c95be83b02f0fbfe15dc2c448f572a1a",
  "sema_ref": "ExtendedThinking#3a90",
  "sema_stub": "3a90",
  "parameters": [
    {
      "name": "budget_mode",
      "type": "Enum",
      "range": "{UserControlled, Adaptive}",
      "description": "Whether the caller sets the reasoning budget or the {{task}}'s complexity does."
    }
  ],
  "dependencies": {
    "accepts": {
      "task": "sema:Task#mh:SHA-256:a85010f508f85055170c396c8fa390125c1206888c565ac10651f3969a339f8d"
    },
    "references": {
      "chain": "sema:Chain#mh:SHA-256:3ba084dba5cf36bbdd43d03306c187ca75a2e3f448b555e257c26aab9b71c4fb"
    }
  },
  "sema_layer": "Mind",
  "sema_category": "Reasoning",
  "used_by": {
    "references": {
      "ThinSlice": "sema:ThinSlice#mh:SHA-256:b667556f36637931632fa2bc3739eade77dd14ad9f3a711f4de95edb10c6d9bc"
    }
  }
}