webiny-js

Covers how to configure the maximum allowed size of the Webiny API Lambda bundle using the Infra.Api.MaxBundleSize extension in webiny.config.tsx. Use when a project's API bundle exceeds the default 4.5 MB limit or when you want to enforce a stricter limit. Handles the extension syntax, byte calculations, and interpreting the build error message.

Interview the user relentlessly about a plan or design until reaching shared understanding, resolving each branch of the decision tree. Use when user wants to stress-test a plan, get grilled on their design, or mentions "grill me".

Turn a PRD into a multi-phase implementation plan using tracer-bullet vertical slices, saved as a local Markdown file in ./plans/. Use when user wants to break down a PRD, create an implementation plan, plan phases from a PRD, or mentions "tracer bullets".

Webiny-only. Run all checks required before packages are ready for publish: deps, build, lint, format, tests.

Use when running tests. Shows how to run tests for a single package, including OpenSearch (ddb-os) tests when applicable.

Covers the PreviewUrlModifier extension point in Website Builder. Use when a user wants to inject custom query parameters into live preview URLs — e.g. signed tokens, tenant identifiers, feature flags — from their Webiny project. Handles the full registration pattern: implementing the interface, wiring via createFeature + RegisterFeature, and registering via webiny.config.tsx. Supports async modifier methods (e.g. remote token fetch).

Adding a new feature flag to the Webiny system. Use this skill when creating a new feature flag (simple boolean or nested group), gating a feature at the config/admin/API level, or wiring a flag into the WCP license system. Covers IFeatureFlagsDto, KnownFeatureFlag, Zod schema, FeatureFlag.CanUse components, useFeatureFlags().isEnabled(), the API FeatureFlags abstraction, toDto(), and the LICENSE_CHECKS decorator pattern.

admin/aco — 2 abstractions.

admin/ai-powerups — 1 abstractions.

Admin-side architecture patterns for Webiny extensions. Use this skill when building frontend features with headless features (UseCase/Repository/Gateway), presentation features (Presenter/ViewModel/hooks/components), MobX-based presenters, RegisterFeature, and Admin BuildParams. Covers the admin/ directory structure for both features/ and presentation/ layers.

admin/build-params — 3 abstractions.

admin — 28 abstractions.

admin/cms — 56 abstractions.

admin/configs — 1 abstractions.

admin/env-config — 2 abstractions.

admin/form — 26 abstractions.

admin/graphql-client — 1 abstractions.

admin/graphql-playground — 4 abstractions.

admin/languages — 2 abstractions.

admin/lexical — 17 abstractions.