@codelaw/rules-data · codelaw-rules-data

codelaw's rules for JSON, YAML, TOML and Markdown — one of the first-party rule packs (SR-RULE-PACKS). The same files ship on npm as @codelaw/rules-data and on PyPI as codelaw-rules-data.

# codelaw.toml
extends = ["codelaw:data/recommended", "codelaw:md/recommended"]
preview = true   # every rule is `preview` until a corpus run promotes it

Presets

42 rules: 9 auto, 5 suggest, 28 manual. Every rule is reimplemented, not vendored: the checks, messages and docs are written fresh, and each ported rule's ported_from: names its source. Rules that need more than a pattern are native rules in crates/codelaw-native/src/data_*.rs; rules about a path in a JSON, YAML or TOML file are target: + assert: rules (SR-RULE-FORMAT decision 3e).

The dependency rules — latest versions, vulnerable packages — are the deps pack's since W-128 (deps/outdated and deps/stale-snapshot were data/outdated-dependency and data/stale-deps-snapshot; SR-RULE-PACKS decision 15).

The starter-catalogue rules are all here under their starter ids: json/package-scripts-sorted, json/package-engines, json/tsconfig-strict, json/no-duplicate-keys, yaml/no-duplicate-keys, yaml/gha-pin-sha, yaml/document-start, toml/pyproject-requires-python, toml/deps-sorted, md/single-h1, md/heading-increment, md/fence-language and md/relative-links.

Ported

The JSON, YAML and TOML rules come from the formats' specifications (RFC 8259, YAML 1.2.2 and its YAML 1.1 differences, TOML 1.0.0) and the Python packaging specifications (PEP 503 names, PEP 621 [project]). yamllint (GPL-3.0) is not a source: no code, documentation text, options or messages are taken from it. One rule name coincides with one of yamllint's — yaml/document-start and its document-start: both describe the same --- marker.

How the ports differ

Not ported, and why

Upstream versions

• markdownlint 0.42.0 (MIT) — the rule set and documented behaviour ported.
• YAML 1.2.2 and YAML 1.1 (the type repository's bool, int and base-60 forms) — the ambiguity rules.
• TOML 1.0.0 — toml/no-duplicate-keys.
• PEP 503, PEP 621 — toml/deps-sorted, toml/pyproject-requires-python.
• sort-package-json (MIT) — the pre/post grouping and the npm-run-all exemption of json/package-scripts-sorted, and the sorted dependency lists of json/package-deps-sorted.
• SchemaStore (Apache-2.0), as served at json.schemastore.org on 2026-10-20 — the five schemas in data/schemas/.

Data

Each is the SchemaStore schema with its annotation-only keywords removed (description, markdownDescription, title, default, examples, $comment, deprecationMessage and the editor-specific x-*, tsType and allowTrailingCommas keys) and written without whitespace; every validation keyword is kept as published. The NOTICE carries SchemaStore's licence.