dev-toolbar-review

By supabase. Updated July 24, 2026. Categories: System Administration.

Safety rules for the dev toolbar, PostHog client, and feature flags. Use when writing or reviewing any change to packages/dev-tools/, packages/common/posthog-client.ts, or packages/common/feature-flags.tsx. Covers environment guards, flag override cookies, telemetry event subscription, and SSE stream safety.

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SKILL.md

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