Purpose

Establish enforceable regression protection for repositories where user-visible behavior is driven by HTML/CSS/JS (including runtime injection/DOM mutation patterns).

This skill defines controls that must block merges/releases when homepage or critical-route invariants regress.

Applicability

Use for:

website-static repositories.
web-app repositories with SSR/SPA routes where visual ordering and runtime rendering matter.
Any repo with HTML/CSS and route-specific runtime scripts that can mutate layout/visibility.

Core controls (required)

Fail-fast publish/runtime verification
- Runtime verification scripts must exit non-zero on invariant failures.
- No warning-only mode for release-critical checks.
Critical-route invariants
- Define route-specific assertions for primary pages (at minimum homepage + key conversion route).

Purpose

Establish enforceable regression protection for repositories where user-visible behavior is driven by HTML/CSS/JS (including runtime injection/DOM mutation patterns).

This skill defines controls that must block merges/releases when homepage or critical-route invariants regress.

Applicability

Use for:

website-static repositories.
web-app repositories with SSR/SPA routes where visual ordering and runtime rendering matter.
Any repo with HTML/CSS and route-specific runtime scripts that can mutate layout/visibility.

Core controls (required)

Fail-fast publish/runtime verification
- Runtime verification scripts must exit non-zero on invariant failures.
- No warning-only mode for release-critical checks.
Critical-route invariants
- Define route-specific assertions for primary pages (at minimum homepage + key conversion route).

Web Regression Governance

Purpose

Applicability

Core controls (required)

Web Regression Governance

Purpose

Applicability

Core controls (required)

Verification matrix

Output format (required)

Extract Errors

Frontend Patterns

Coding Standards

Coding Standards

Coding Standards

Frontend Patterns