[CatOfJupit3r]

What changed

Two type-aware rules asked the TypeScript checker for types before running their cheap syntactic checks. Findings are unchanged.

• prefer-native-schema-adapters calls getResolvedSignature() only when the member call's static method name is a Zod or Valibot schema factory (enum, nativeEnum, picklist). Before this, it resolved a signature for every member call that had an argument.
• no-enumwaii-case-misuse runs every syntactic exclusion before getTypeAtLocation(), which skips imports, declarations, member objects and properties, parameters and type positions. For non-.cases member accesses, it skips the type query when the access is already an allowed case usage, unless the key is computed. It also caches its cases-brand decision per TypeScript Type in a WeakMap. TypeScript types never change, and each program has its own type objects, so the cache cannot return a stale decision.

The changeset is a patch bump of eslint-plugin-enumwaii (1.2.1 → 1.2.2).

Validation

All numbers come from the koneko monorepo (apps/web, apps/server), linted with only the enumwaii/* rules enabled. A config wrapper outside koneko swapped in a local build of this plugin. "Before" is origin/main (217e60d) and "after" is this branch. Nothing in koneko was changed.

hyperfine (one invocation per workspace, --warmup 1 --runs 8)

The machine was quiet: no other hyperfine, Vitest or ESLint process ran, and CPU load was sampled every 30 s at 5-53% (mostly 12-23%).

Workspace	Before [s]	After [s]	Relative
server	20.963 ± 0.174	20.453 ± 0.079	1.02 ± 0.01
web	24.017 ± 0.855	23.315 ± 0.307	1.03 ± 0.04

The server gain (0.51 s) is outside both standard deviations. The web gain (0.70 s) is within the before run's standard deviation, so it is not claimed as a measured win.

Per-rule TIMING=all (ms, all enumwaii/* rules in one run)

Rule	web before	web after	server before	server after
no-enumwaii-case-misuse	5531	5663	7288	6669
prefer-native-schema-adapters	1249	9	1853	9
no-manual-enum	53	370	27	1854
no-raw-enum-comparison	115	229	14	59
others (5 rules)	121	127	70	77
sum	7069	6397	9251	8669

ESLint TIMING charges TypeScript's lazy checking to whichever rule first asks the checker about a node. With prefer-native-schema-adapters no longer resolving signatures, part of that shared checking moves to no-manual-enum. Use the sum to compare totals; the per-rule rows show where the time moved.

Checker calls (counted by wrapping parser services)

Rule / call	web before	web after	server before	server after
no-enumwaii-case-misuse getTypeAtLocation	116,364	55,492	103,540	46,356
prefer-native-schema-adapters getResolvedSignature	2,583	0	6,896	0

Other rules' checker calls are unchanged. A CPU profile of no-enumwaii-case-misuse alone on web shows that most of its remaining time is TypeScript's checkExpression behind getTypeAtLocation on the identifiers it must classify. The rule cannot skip those queries without changing what it reports. The per-type cache cuts the rule's own getProperties scanning from 266 ms to 98 ms.

Findings are identical

• Plugin test suite: 116/116 passed. No test was changed, so every assertion is as strict as before.
• koneko ESLint findings from the enumwaii rules are identical before and after: 0 = 0 on web and 0 = 0 on server, compared by file, line, column, rule and message.
• The pnpm check chain passed (exit 0). It ran with format:check:core in place of format:check, because the root Prettier check also scans an untracked local .claude/worktrees checkout that is not part of this branch.

Checklist

• The change is focused and linked to an issue when applicable.
• Runtime and type tests cover behavior or inference changes. No behavior changes; the existing rule tests pass unchanged.
• Public API changes include useful JSDoc and authored documentation. No public API change.
• Lint rule changes include valid and invalid parser-service cases. The existing cases cover both rules and pass unchanged.
• A Changeset is included for each user-visible published-package change, or this pull request explains why none is needed.
• pnpm check passes.

[CatOfJupit3r]