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Lemma is an IDE for human-agent mathematical reasoning.

First seen 2026-11-05 · Last seen 2026-11-05 · Source: webmcp.com

Answer 9 · Act 13 · Transact 0 · Score: Not yet scored

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mark_assumption

act imperative

Create a first-class assumption and attach it to a step only when expected_step_revision is current. This mutation is idempotent for the supplied idempotency_key.

Input schema

Property	Type	Required	Description
`step_id`	string	yes	A UUID that identifies a persisted Lemma resource.
`expected_step_revision`	integer	yes	A positive optimistic-concurrency revision.
`label`	string	yes	—
`statement_markdown`	string	yes	Markdown with inline TeX delimited by $...$ and display TeX delimited by $$...$$.
`idempotency_key`	string	yes	A caller-generated key that makes a mutation retry safe.
`usage_kind`	string	no	—
`assumption_status`	string	no	—
`note_markdown`	string	no	Markdown with inline TeX delimited by $...$ and display TeX delimited by $$...$$.
`author_type`	string	yes	—
`author_agent_name`	string	no	—

Raw JSON schema

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "type": "object",
  "properties": {
    "step_id": {
      "type": "string",
      "format": "uuid",
      "pattern": "^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1-8][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}|00000000-0000-0000-0000-000000000000|ffffffff-ffff-ffff-ffff-ffffffffffff)$",
      "description": "A UUID that identifies a persisted Lemma resource."
    },
    "expected_step_revision": {
      "type": "integer",
      "exclusiveMinimum": 0,
      "maximum": 9007199254740991,
      "description": "A positive optimistic-concurrency revision."
    },
    "label": {
      "type": "string",
      "minLength": 1,
      "maxLength": 160
    },
    "statement_markdown": {
      "type": "string",
      "minLength": 1,
      "maxLength": 100000,
      "description": "Markdown with inline TeX delimited by $...$ and display TeX delimited by $$...$$."
    },
    "idempotency_key": {
      "type": "string",
      "minLength": 8,
      "maxLength": 200,
      "description": "A caller-generated key that makes a mutation retry safe."
    },
    "usage_kind": {
      "default": "used",
      "type": "string",
      "enum": [
        "introduced",
        "used",
        "challenged",
        "discharged"
      ]
    },
    "assumption_status": {
      "default": "proposed",
      "type": "string",
      "enum": [
        "proposed",
        "accepted",
        "challenged",
        "rejected",
        "discharged"
      ]
    },
    "note_markdown": {
      "default": "",
      "type": "string",
      "maxLength": 20000,
      "description": "Markdown with inline TeX delimited by $...$ and display TeX delimited by $$...$$."
    },
    "author_type": {
      "type": "string",
      "enum": [
        "human",
        "agent"
      ]
    },
    "author_agent_name": {
      "type": "string",
      "minLength": 1,
      "maxLength": 160
    }
  },
  "required": [
    "step_id",
    "expected_step_revision",
    "label",
    "statement_markdown",
    "idempotency_key",
    "author_type"
  ],
  "additionalProperties": false
}

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