feat(naming): add opt-in allowedWords for Roblox names

[christopher-buss]

Why

strictCamelCase and StrictPascalCase reject two capitals in a row, which puts them at odds with Roblox's own casing. A CFrame had to be stored in targetCframe, so the identifier stopped matching the type it held. The existing escapes are too blunt: filter skips a whole config, custom only adds constraints.

eslint-plugin-flawless@1.7.0 adds allowedWords, which lets listed words keep their own casing while the rest of the name is still checked. This wires that up for Roblox, off by default.

What changed

Plugin bump — eslint-plugin-flawless 1.5.1 → 1.7.0. pnpm gen picks allowedWords out of the rule schema, so NamingSelector gains it with no manual type work. 1.6.0/1.6.1 ride along; no snapshot drift.

New option — naming: { allowedWords }, default false.

export default isentinel({
	naming: { allowedWords: true },
});

const targetCFrame = new CFrame(); // ok
const listLayoutUIPadding = 0; // ok
const target_CFrame = 0; // still an error

true uses the generated Roblox list; an array uses exactly those words. ROBLOX_ALLOWED_WORDS is exported so a consumer can spread it to extend rather than replace.

It is set once as settings.flawless.namingConvention.allowedWords on the isentinel/naming/setup item, rather than copied onto ~10 selectors across the TS and TSX blocks. That also means it reaches selectors passed through naming.selectors; a selector opts out with its own allowedWords: []. The settings key is spread in conditionally, so the default emits no new config surface and existing snapshots are untouched.

Generated word list — scripts/roblox-allowed-words-gen.ts scrapes @rbxts/types and writes src/generated/roblox-allowed-words.ts.

Why the list is 67 words, not thousands

Only names holding two capitals in a row can trip the strict formats. That is 82 of the 1534 names @rbxts/types declares (datatypes, Instance classes, Enum.* namespaces). Pruning names a shorter word already resolves — CFrame absorbs CFrameValue, CFrameConstructor and UserCFrame; UDim absorbs UDim2 — leaves 67.

For comparison, the raw Roblox API-Dump.json yields 400. The extra ~320 are member and enum-item names, which are property accesses (Enum.TextXAlignment.Center) rather than declared identifiers, so naming-convention never sees them. @rbxts/types is the surface that actually produces identifier names in roblox-ts.

The existing @isentinel/dict-roblox could not be reused — it is case-flattened (cframe, not CFrame).

roblox-allowed-words-shared.ts mirrors flawless's own applyAllowedWords, so the pruning asks exactly the question the rule asks at lint time. Sorting is by code unit rather than localeCompare, so the output does not depend on the host locale.

Reviewer notes

• @rbxts/types is a devDependency and the scrape runs at build time. A consumer may pin a different version, or none, and parsing ~4MB of .d.ts on every config load to answer a question that only changes on a bump is not worth it. Same rationale as stylistic-gen.ts and type-aware-gen.ts.
• nr check:roblox-words runs in CI before the build, since pnpm gen would otherwise repair a stale snapshot in place and the drift would never be reported. test/roblox-allowed-words.spec.ts re-derives from the installed package and fails on drift.
• No oxlint work — flawless/naming-convention is pinned to ESLint in src/oxlint/routing.ts.
• Open question: the list is fully mechanical, so it includes a few Studio-internal names nobody writes (QDir, QFont, RBXObject, ILegacyStudioBridge, DebuggerUIService). Filtering them would mean hand-maintaining a denylist — the only non-generated part of the pipeline. They are harmless, so they stayed. Happy to add the denylist if preferred.

Verification

pnpm gen, pnpm typecheck, pnpm build, pnpm lint and pnpm test all pass locally (39 files, 558 tests, no type errors). test/naming-allowed-words.spec.ts lints through the real setup item: targetCFrame errors by default and passes when enabled, while target_CFrame and targetXCFrame still error.

🤖 Generated with Claude Code

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📥 Commits

Reviewing files that changed from the base of the PR and between c2ed278 and 6a50121.

⛔ Files ignored due to path filters (2)

• pnpm-lock.yaml is excluded by !**/pnpm-lock.yaml
• src/generated/roblox-allowed-words.ts is excluded by !**/generated/**

📒 Files selected for processing (12)

• .github/workflows/ci.yaml
• CLAUDE.md
• README.md
• package.json
• pnpm-workspace.yaml
• scripts/roblox-allowed-words-gen.ts
• scripts/roblox-allowed-words-shared.ts
• src/eslint/configs/naming.ts
• src/eslint/index.ts
• src/eslint/types.ts
• test/naming-allowed-words.spec.ts
• test/roblox-allowed-words.spec.ts

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