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sinch-partnerships-ecosystems/sinch-skills

Official Sinch API skills for AI coding agents — SMS, Voice, Verification, Numbers, Mailgun email, and more.

71

Quality

88%

Does it follow best practices?

Impact

No eval scenarios have been run

SecuritybySnyk

Advisory

Suggest reviewing before use

This plugin was archived by the owner on Jun 4, 2026

Reason: we moved this to another workspace

Overview
Quality
Evals
Security
Files

Quality

Content

85%

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

This is a strong, well-structured skill that provides highly actionable guidance with clear workflows, concrete examples, and excellent gotchas coverage. The progressive disclosure is well-handled with appropriate references to sibling skills and external documentation. Minor verbosity in a few explanatory sentences prevents a perfect conciseness score, but overall token efficiency is good.

DimensionReasoningScore

Conciseness

Generally efficient but has some unnecessary padding — e.g., 'Ensure that authentication headers are properly set when making API calls' is filler Claude doesn't need. The response schema tables are thorough but borderline verbose; some fields could be condensed. The 'Authentication' section header text adds little. Overall mostly lean but not maximally tight.

2 / 3

Actionability

Provides a fully executable curl example, concrete request/response field tables with exact enum values, specific workflow decision trees with precise field checks (e.g., 'if swapPeriod is SP4H or SP24H'), and a working JavaScript parallel-request snippet. Highly copy-paste ready.

3 / 3

Workflow Clarity

The four common workflows are clearly sequenced with numbered steps, explicit conditional branching, and error handling (e.g., 'If either feature returns a non-null error → fall back to the other feature's result'). The fraud check workflow includes validation checkpoints for partial failures. The gotchas section serves as an excellent error-prevention checklist.

3 / 3

Progressive Disclosure

Clean structure: overview → agent instructions → getting started → request/response → workflows → gotchas → links. References to external skills (sinch-sdks, sinch-authentication) and external docs are one level deep and clearly signaled. The inline content is appropriately scoped for a SKILL.md overview, with detailed schemas and full flows linked out.

3 / 3

Total

11

/

12

Passed

Description

100%

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

This is an excellent skill description that clearly identifies the specific API (Sinch Number Lookup), lists concrete capabilities (carrier lookup, SIM swap detection, VoIP detection, etc.), and provides explicit trigger guidance with a 'Use when' clause. It uses proper third-person voice and covers both the 'what' and 'when' comprehensively while maintaining a distinct niche.

DimensionReasoningScore

Specificity

Lists multiple specific concrete actions: checking carrier, line type, porting status, SIM swap, VoIP detection, and reassigned number detection (RND), plus use cases like fraud prevention and routing decisions.

3 / 3

Completeness

Clearly answers both 'what' (looks up phone number details via Sinch Number Lookup API) and 'when' (explicit 'Use when' clause listing specific trigger scenarios like checking carrier, line type, porting status, SIM swap, VoIP detection, or RND for fraud prevention or routing decisions).

3 / 3

Trigger Term Quality

Excellent coverage of natural terms users would say: 'phone number', 'carrier', 'line type', 'porting status', 'SIM swap', 'VoIP detection', 'fraud prevention', 'routing', 'Number Lookup', 'Sinch', and the acronym 'RND'. These are terms a user would naturally use when needing this capability.

3 / 3

Distinctiveness Conflict Risk

Highly distinctive with a clear niche: Sinch Number Lookup API for phone number intelligence. The specific triggers (SIM swap, porting status, VoIP detection, RND) are unlikely to conflict with other skills.

3 / 3

Total

12

/

12

Passed

Validation

90%

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

Validation10 / 11 Passed

Validation for skill structure

CriteriaDescriptionResult

metadata_field

'metadata' should map string keys to string values

Warning

Total

10

/

11

Passed

Reviewed

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