axiom-data

Use when working with ANY data persistence, database, storage, CloudKit, migration, or serialization. Covers SwiftData, Core Data, GRDB, SQLite, CloudKit sync, file storage, Codable, migrations.

Quality

81%

Does it follow best practices?

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Securityby

Passed

No findings from the security scan

Quality

Content

72%

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

A well-structured router skill that excels at progressive disclosure and gives concrete, actionable navigation. Its main weaknesses are redundant mapping repetition across three sections and a decision tree without validation checkpoints or consistent numbering.

Suggestions

Collapse the overlapping Quick Reference, Decision Tree, and Example Invocations into a single canonical routing table to remove triple-repeated mappings and save tokens.

Normalize the decision-tree numbering (replace 3a/3b/3c and 23a with a flatter, consistent scheme) so the routing sequence is unambiguous.

Add an explicit validation checkpoint for the migration path (e.g. 'After choosing a migration reference, confirm the schema change is covered before editing') since this skill routes to destructive database operations.

Dimension	Reasoning	Score
Conciseness	It does not explain concepts Claude already knows, but the same symptom-to-reference mappings are repeated across the Quick Reference table, Decision Tree, and Example Invocations (e.g. SwiftData → skills/swiftdata.md appears three times), so the token budget could be tightened.	2 / 3
Actionability	Routing guidance is concrete and executable throughout — specific file paths (skills/grdb.md), named auditor agents to launch (core-data-auditor), and slash commands (/axiom:audit core-data), which is the correct actionable form for an instruction/router skill.	3 / 3
Workflow Clarity	The numbered Decision Tree provides a clear routing sequence, but there are no validation/feedback checkpoints and the numbering is inconsistent (3, 3a, 23, 23a); given it routes to destructive database-migration work, the missing guardrails cap clarity at 2.	2 / 3
Progressive Disclosure	A textbook router structure: a concise SKILL.md overview pointing one level deep to well-signaled reference files via the Quick Reference table and Decision Tree, with content appropriately split out rather than inlined.	3 / 3
	Total	10 / 12 Passed

Description

90%

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, well-scoped trigger description with explicit 'Use when' guidance and natural trigger terms. Its only weakness is a lack of concrete action verbs, leaning on 'working with' and 'Covers' instead of describing what the skill actually does.

Dimension	Reasoning	Score
Specificity	Lists concrete technologies (SwiftData, Core Data, GRDB, SQLite, Codable, etc.) but relies on the vague verbs 'working with' and 'Covers' rather than naming concrete actions, so it sits at the domain-and-some-actions level rather than full action specificity.	2 / 3
Completeness	Explicitly answers both: 'Use when working with…' gives the when, and 'Covers SwiftData, Core Data, GRDB…' gives the what/scope.	3 / 3
Trigger Term Quality	Natural user-facing terms are well covered — 'data persistence', 'database', 'storage', 'CloudKit', 'migration', 'serialization' plus the specific framework names users actually mention.	3 / 3
Distinctiveness Conflict Risk	A clear Apple-platform data-persistence niche, further scoped by delegating keychain/crypto to axiom-security and tvOS to axiom-swift, making wrong-skill triggering unlikely.	3 / 3
	Total	11 / 12 Passed

Validation

93%

Warnings & errors only

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

Validation — 15 / 16 Passed

Validation for skill structure

Criteria	Description	Result
referenced_paths_exist	Referenced path issues: 1 missing	Warning

	Total	15 / 16 Passed

Repository: CharlesWiltgen/Axiom
Path: .claude-plugin/plugins/axiom/skills/axiom-data/SKILL.md
Commit: ea3be7c

Reviewed: 1 day ago

Table of Contents

Discovery Implementation Validation

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