Qwik Optimizer Development

Use this skill for packages/optimizer/** and Rust optimizer work. Keep the repo-wide rules from .ruler/AGENTS.md in force.

Fast Path

1. Identify whether the change is Rust transform logic, snapshots, WASM bindings, NAPI bindings, or TypeScript optimizer-facing integration.
2. Read the closest Rust source, fixture, snapshot, and runtime helper that consumes the emitted shape before editing.
3. Keep transform behavior deterministic: prefer explicit parser/AST cases and stable ordering over source-text heuristics.
4. Use Rust-focused verification first; use pnpm build.full only when a full optimizer/WASM rebuild is required.
5. If a runtime/core change is also involved, load qwik-core-development for that slice.

Source Map

• Rust optimizer core: packages/optimizer/core/src/
• Rust fixtures: packages/optimizer/core/src/fixtures/
• Rust snapshots: packages/optimizer/core/src/snapshots/
• WASM bindings: packages/optimizer/wasm/
• NAPI bindings: packages/optimizer/napi/
• Optimizer package entry points: packages/optimizer/src/
• Vite/Rollup integration: packages/qwik-vite/src/

Verification

Use the smallest command that covers the change:

pnpm test.rust
pnpm test.rust.update
pnpm build.full
pnpm vitest run packages/qwik-vite/src/plugins/plugin.unit.ts

pnpm test.rust maps to make test, which runs Cargo tests for packages/optimizer/core/Cargo.toml. Use pnpm test.rust.update only when snapshot updates are intentional.

Hard Rules

• Do not hand-edit generated optimizer build output in dist/, lib/, or target/.
• Do not update snapshots without understanding the transform behavior change.
• Add or update a transform fixture/snapshot for every optimizer behavior change, including negative cases where the transform must not run.
• Keep optimizer output and runtime JSX/QRL/loader semantics in sync. If a transform changes an emitted attribute, import, segment, or capture shape, inspect the runtime consumer too.
• After touching packages/optimizer/core/, do not claim verification without Rust test/build evidence or a recorded blocker.
• If this skill becomes stale after source inspection, update it before finishing or record why guidance edits were out of scope.