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supabase-realtime

Comprehensive guide for implementing Supabase Realtime features with best practices, scalable patterns, and migration strategies. Use when building realtime features in Supabase applications including messaging, notifications, presence, live updates, collaborative features, or migrating from postgres_changes to broadcast. Covers client setup, database triggers with realtime.broadcast_changes, RLS authorization, naming conventions, and performance optimization.

73

Quality

90%

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SKILL.md
Quality
Evals
Security

Quality

Content

87%Weight 40%Scale 1-5

Reviews the quality of instructions and guidance provided to agents. Good implementation is clear, handles edge cases, and produces reliable results.

A tight, actionable skill body with excellent code examples and clean progressive disclosure to real bundle files. The main gap is the absence of explicit validation/verification steps for the database-trigger and RLS operations, which caps workflow clarity.

Suggestions

Add a validation checkpoint to the implementation checklist (e.g., 'Insert a test row and confirm the broadcast fires', 'Verify RLS denies non-member reads') with a fix-and-retry loop.

Show how to verify channel subscription success/failure handling beyond the single `SUBSCRIBED` log line — include error-state recovery guidance.

Add a brief 'test the trigger/RLS' SQL snippet alongside each pattern so verification is executable rather than implied.

DimensionReasoningScore

Conciseness

Lean body that assumes competence — terse core principles, executable code blocks, and a checklist with no padding or explanation of concepts Claude already knows; every section earns its tokens.

5 / 5

Actionability

Copy-paste-ready JavaScript and SQL for client setup, broadcast triggers, and RLS policies, plus concrete naming conventions and real referenced scripts covering the common cases.

5 / 5

Workflow Clarity

An implementation checklist gives a rough sequence, but the database-trigger and RLS work lacks an explicit validate→fix→retry loop (e.g., test the trigger fires, verify RLS authorizes); per the rubric cap, database operations without validation cannot exceed 3.

3 / 5

Progressive Disclosure

Clear overview structure with quick-reference patterns inline and advanced detail pushed to one-level-deep, well-signaled links to real files in references/ and scripts/, making navigation easy.

5 / 5

Total

18

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20

Passed

Description

92%Weight 40%Scale 1-5

Based on the skill's description, can an agent find and select it at the right time? Clear, specific descriptions lead to better discovery.

A high-quality, third-person description that crisply states capabilities and an explicit 'Use when' trigger clause tailored to Supabase Realtime. Only minor weakness is slightly less exhaustive synonym coverage in trigger terms.

DimensionReasoningScore

Specificity

Lists multiple concrete capabilities — "client setup, database triggers with realtime.broadcast_changes, RLS authorization, naming conventions, and performance optimization" — giving comprehensive coverage rather than vague abstraction.

5 / 5

Completeness

Explicitly answers both what ("implementing Supabase Realtime features... Covers client setup...") and when ("Use when building realtime features... including messaging, notifications...") with concrete trigger phrases.

5 / 5

Trigger Term Quality

Strong natural triggers ("messaging, notifications, presence, live updates, collaborative features", "migrating from postgres_changes to broadcast"), but misses common synonyms a user might say like "chat" or "WebSockets".

4 / 5

Distinctiveness Conflict Risk

Scoped tightly to Supabase Realtime with distinctive tokens ("postgres_changes", "broadcast", "realtime.broadcast_changes"), making conflict with unrelated skills minimal.

5 / 5

Total

19

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20

Passed

Validation

100%

Checks the skill against the spec for correct structure and formatting. All validation checks must pass before discovery and implementation can be scored.

Validation16 / 16 Passed

Validation for skill structure

No warnings or errors.

Repository
Raudbjorn/claude
Reviewed

Table of Contents

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