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The Superior Court of Justice (STJ) published, on August 20, 2026, Normative Instruction STJ/GP No. 42/2026, which regulates Article 343-A of the Court’s Internal Rules and establishes the requirements for submitting a structured summary in initial petitions for original actions and appeals brought before the Court.

The measure aims to enable the automated screening, classification, and grouping of cases through artificial intelligence systems.

The summary will not need to be included in the body of the petition. Instead, it will be completed in specific fields within the electronic system, in a machine-readable format. In special appeals, interlocutory appeals against special appeals, ordinary appeals, and requests for uniformization of case law, the summary must be completed when the appeal is filed before the court of origin.

There will be five main fields: a summary of the facts and the challenged decision; legal grounds, indicating the provisions related to each legal argument; requests, including successive and subsidiary requests; qualified precedents, súmulas, and statements relied upon; and, in special appeals, an indication of the relevance of the federal legal issue or of a case in which relevance is presumed. The recommendation is to limit each field to 3,000 characters, using clear, objective language that accurately reflects the petition.

The requirement will not take effect immediately. Although the rule is already in force, mandatory compliance will depend on an order issued by the STJ Presidency after the necessary fields and tools have been implemented. From that point onward, there will be a 90-calendar-day adaptation period during which any errors will result only in a notice providing guidance.

After this period, failure to submit the summary, failure to complete a mandatory field, or inconsistencies between the summary and the petition may result in a notice requiring correction within 10 days. Such correction may not modify the grounds of the appeal or affect the timeliness of an appeal that has already been assessed.

For the time being, the new system does not apply to initial petitions and appeals falling within the jurisdiction of the Third Section, which will be subject to specific regulations.