CtrlK
BlogDocsLog inGet started
Tessl Logo

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

100%

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

This is an excellent skill file that efficiently covers a complex API surface. It excels at providing actionable, specific guidance (exact param names, endpoint differences, gotchas) without over-explaining concepts Claude already knows. The workflow sections include proper validation checkpoints and safe retry patterns for billable operations, and the progressive disclosure structure cleanly separates SDK-specific details into referenced files.

DimensionReasoningScore

Conciseness

The content is lean and efficient throughout. It avoids explaining what phone numbers or APIs are, assumes Claude understands HTTP methods, auth patterns, and SDK concepts. Every section delivers specific, non-obvious information (param name differences, gotchas, discriminated unions). The gotchas section is dense with genuinely useful edge cases rather than padding.

3 / 3

Actionability

Provides executable curl commands, specific endpoint paths with required parameters clearly marked, concrete workflow steps (search → rent → confirm), and specific field names and values. The safe retry workflow and unlinking instructions are precise and copy-paste actionable.

3 / 3

Workflow Clarity

Multi-step workflows are clearly sequenced with numbered steps. The 'Safe retries for billable operations' section provides an explicit verification-before-retry feedback loop for destructive/billable operations. The search-and-rent workflow includes a confirmation step (GET activeNumbers to confirm activation). Update workflow starts with checking current config before patching.

3 / 3

Progressive Disclosure

The skill provides a clear overview with well-signaled references to SDK-specific files (references/typescript.md, references/python.md, references/java.md), authentication skill, and external API references. References are one level deep and organized in a table for easy navigation. Advanced topics (emergency addresses, number orders, imported numbers) are briefly described with pointers to the API reference.

3 / 3

Total

12

/

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 articulates specific capabilities, provides explicit trigger conditions via a 'Use when...' clause, and uses natural keywords throughout. It is highly distinctive due to the Sinch Numbers API branding and the specific domain of phone number management. No significant weaknesses identified.

DimensionReasoningScore

Specificity

Lists multiple specific concrete actions: search, rent, manage, release phone numbers, listing active numbers, searching available numbers, renting/releasing, updating number configuration (SMS/voice/callback), managing emergency addresses, and checking available regions.

3 / 3

Completeness

Clearly answers both 'what' (search, rent, manage, release phone numbers via Sinch Numbers API) and 'when' with an explicit 'Use when...' clause listing six specific trigger scenarios.

3 / 3

Trigger Term Quality

Includes strong natural keywords users would say: 'phone numbers', 'rent', 'release', 'SMS', 'voice', 'callback', 'emergency addresses', 'available regions', 'Sinch Numbers API', 'active numbers', 'available numbers'. Good coverage of domain-specific terms a user would naturally use.

3 / 3

Distinctiveness Conflict Risk

Highly distinctive with clear niche targeting the Sinch Numbers API specifically. The combination of phone number management, SMS/voice configuration, emergency addresses, and the Sinch brand name makes it very 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

Table of Contents