---
title: "ADR-243: A rule set is a snippet and a term list"
manual: "LLM Foundation"
version: "0.43"
permalink: "https://docs.typo3.org/permalink/netresearch/nr-llm:adr-243@0.43"
source: "Adr/Adr243ARuleSetIsASnippetAndATermList.rst"
rendered: "2026-11-04T13:45:29+00:00"
---

# ADR-243: A rule set is a snippet and a term list {#adr-243}

-   *Status:* Accepted
-   *Date:* 2026-11-02
-   *Authors:* Netresearch DTT GmbH

## Context {#context}

An audit of the stack asked for a central record of brand, legal and design rules
that the cowriter, nr-landingpage and nr-repurpose use as context and can be
checked against. [ADR-139](https://docs.typo3.org/permalink/netresearch/nr-llm:adr-139@0.43) deferred a context provider registry
until a consumer has a source that can be expressed neither as a skill nor as a
tagged snippet. [ADR-214](https://docs.typo3.org/permalink/netresearch/nr-llm:adr-214-d8@0.43) item 8 settled how a snippet reaches a
caller that sends its own system message.

## Decision {#decision}

**No new record. A rule set is a tagged snippet for the context and a term list
for the check.** Both exist, and the trigger of ADR-139 has not fired: rules for a
brand are text, which a snippet holds.

-   The prose goes into a prompt snippet with a tag the configurations of these
    surfaces select. Without a system message of the caller it joins the
    configuration's prompt. With one, as a surface with its own prompt sends, it
    joins when an administrator marked the snippet and the configuration opted in
    (ADR-214 item 8).
-   What a machine can check goes into a term list on the same configurations
    ([ADR-238](https://docs.typo3.org/permalink/netresearch/nr-llm:adr-238@0.43)): forbidden and required terms, with a message that can
    point at the rule.

A required term is not asked of an agent run. A prose rule is not checked. ADR-238 rejected a language model as the checker,
because a block has to be explainable by pointing at a line in a record, and a
rule set does not change that.

## Consequences {#consequences}

-   ● One place for the prose and one for the words, both already editable, marked
    and reported on.
-   ◑ A rule such as "address the reader formally" is context and no check.
-   ◑ A surface that sends its own system message needs the mark and the opt-in, or
    the rule does not reach it.

Net Score: +2

## Alternatives considered {#alternatives-considered}

**A rule set record with sections.** Rejected: it would be a third home for the
text of a snippet, with its own approval path and no consumer it serves better.