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Use when changing perf-sensitive codepaths (parsing, selector/extend algorithms). Provides a lightweight sanity protocol and avoids ungrounded perf claims.
Codex または Claude でインストール この Prompt をコピーして Codex、Claude、または他のアシスタントに貼り付けると、Skill ページを確認してインストールできます。
SOC 職業分類に基づく
Load BEFORE writing or changing code on Jess hot paths (core tree/eval/render, grammar/parser, extend/selector algorithms). Packages the 9 V8-architecture invariants as pre-write checks and points at the canonical checklist.
Use when working with fixture-based or expected-output tests (especially Less test-data). Helps isolate one fixture, reproduce deterministically, update expectations safely, and avoid cross-package build pitfalls.
Use when changing exports, entrypoints, or shared types across packages. Ensures public API stability, correct ESM/CJS surface, and cross-package build/test validation.
Keep reviews light by running quick spec and quality checks after each task before claiming completion.
Use a strict observe-hypothesize-trace-verify-fix loop when debugging; avoid random changes and context loss. Use when the user is debugging, investigating a failure, or fixing a bug.
Run and read the verification command every time before claiming success. Use when you are about to report a fix, tests/builds passing, or task completion.
| name | perf-sanity |
| description | Use when changing perf-sensitive codepaths (parsing, selector/extend algorithms). Provides a lightweight sanity protocol and avoids ungrounded perf claims. |
Use this skill when touching known perf-sensitive hotspots, especially:
packages/*-parser/src/** (tokenization/productions/parsing)packages/core/src/tree/util/extend.ts (extend selector algorithm)State the expected perf impact
Prefer “sanity checks” over claims
Keep changes locally contained
Watch for cross-package behavior
lib/ output confusion (build upstream first when needed).