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yjs

Yjs 14 CRDT patterns for Epicenter row documents: @y/y shared types, transactions, updateV2 persistence, row-addressed synchronization, awareness, conflict resolution, and document storage. Use when mentioning Yjs, Y.Doc, CRDTs, collaborative editing, awareness, owner-side SQLite document persistence, row documents, or Yjs providers.

73

Quality

91%

Does it follow best practices?

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SecuritybySnyk

Low

Low-risk findings worth noting

SKILL.md
Quality
Evals
Security

Quality

Content

82%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 well-structured, token-efficient body that leads with upstream grounding and uses concrete code and file paths throughout. Its main weakness is illustrative-but-not-standalone code and prose-style workflows where numbered checklists with explicit validation gates would help.

Suggestions

Convert the persistence/compaction/deletion prose into numbered workflows with explicit 'Validate → fix → retry' checkpoints, since these are destructive batch operations.

Make code examples self-contained or mark them clearly as pattern illustrations, so readers know which are copy-paste ready versus which depend on internal Epicenter handles.

Move the large 'Working with Raw Y.js Types' section into its referenced article and keep only a short boundary-summary in SKILL.md to reduce inline bulk.

DimensionReasoningScore

Conciseness

Dense, operational prose that assumes Claude's competence — it never explains what a CRDT or library is, and every section adds domain-specific grounding rather than filler.

5 / 5

Actionability

Concrete API calls (Y.encodeStateVector, Y.applyUpdateV2, db.notes.update) and BAD/GOOD code examples are present, but several snippets reference internal handles (handle.append, handle.write) that are illustrative rather than copy-paste runnable.

4 / 5

Workflow Clarity

Destructive/batch operations (append, compaction, deletion) carry validation and feedback loops ('Check row liveness inside the append transaction', 'Revoke the live handle rather than allowing memory to diverge'), but workflows are prose patterns rather than numbered checklists.

4 / 5

Progressive Disclosure

Bundle references (references/debugging.md, references/document-design.md) are real, one level deep, and clearly signaled inline; the large inlined abstraction-leaks section, however, also points to an external article, leaving a minor organization overlap.

4 / 5

Total

17

/

20

Passed

Description

100%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 strong, third-person description that concretely enumerates capabilities and pairs them with an explicit trigger clause covering natural synonyms. It cleanly satisfies what, when, and distinctiveness with no padding.

DimensionReasoningScore

Specificity

Lists multiple concrete capabilities — '@y/y shared types, transactions, updateV2 persistence, row-addressed synchronization, awareness, conflict resolution, and document storage' — matching the comprehensive-coverage anchor.

5 / 5

Completeness

Explicitly answers both what (the enumerated CRDT patterns) and when (a concrete 'Use when mentioning...' trigger clause), matching the top anchor.

5 / 5

Trigger Term Quality

The 'Use when mentioning Yjs, Y.Doc, CRDTs, collaborative editing, awareness, owner-side SQLite document persistence, row documents, or Yjs providers' clause covers natural terms plus synonyms (Yjs/Y.Doc) and package references.

5 / 5

Distinctiveness Conflict Risk

The Epicenter row-document / Yjs 14 / @y/y niche with specific triggers gives it a clear, low-conflict scope distinct from generic skills.

5 / 5

Total

20

/

20

Passed

Validation

93%

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

Validation15 / 16 Passed

Validation for skill structure

CriteriaDescriptionResult

relative_links

Relative link issues: 4 suspicious

Warning

Total

15

/

16

Passed

Repository
EpicenterHQ/epicenter
Reviewed

Table of Contents

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