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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

77%

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

This is a well-structured, highly actionable skill that covers a complex multi-workflow API with clear decision trees, concrete API calls, and proper validation checkpoints. Its main weakness is length—the content is comprehensive but could benefit from splitting detailed workflow content into reference files for better progressive disclosure. Minor verbosity in a few sections (authentication preamble, some concept explanations) slightly reduces token efficiency.

Suggestions

Move detailed workflow steps (B through F) into a separate references/workflows.md file, keeping only Workflow A and the decision tree in SKILL.md as the quick-start path.

Trim the authentication section—remove 'Ensure that authentication headers are properly set when making API calls' and just show the header pattern with a link to the auth skill.

DimensionReasoningScore

Conciseness

Generally efficient with good use of decision trees and checklists, but includes some unnecessary explanations (e.g., 'Ensure that authentication headers are properly set when making API calls' is obvious). The agent instructions section asking clarifying questions adds useful structure but some phrasing could be tighter. The key concepts section is borderline—useful for domain-specific terms but slightly verbose.

2 / 3

Actionability

Provides concrete, executable curl commands, specific API endpoints with full paths, exact request bodies, and clear per-workflow steps with specific parameters to collect. The decision tree maps user intent directly to workflows, and each workflow has explicit API calls and verification steps.

3 / 3

Workflow Clarity

Each workflow has clearly numbered steps with checkboxes, explicit validation/verification steps (e.g., 'Verify: GET /importedNumbers/{phoneNumber}'), async polling guidance, and critical reminders (e.g., email invoices to orders@sinch.com). The unlink-before-relinking rule and the 'only when valid' patterns show awareness of destructive operations. Error states and recovery paths are documented.

3 / 3

Progressive Disclosure

References callbacks.md and the auth skill appropriately, and links to external API docs per workflow. However, the skill is quite long (~200+ lines) with inline content that could be split—the full workflow details, gotchas, and key concepts could benefit from being in separate reference files. The referenced 'references/callbacks.md' bundle file is not provided, making it impossible to verify that reference works.

2 / 3

Total

10

/

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 defines its scope around Sinch SMS phone number management via a specific API. It provides concrete actions, explicit trigger conditions with a 'Use when...' clause, and highly distinctive domain-specific terminology that minimizes conflict risk. The description is concise yet comprehensive, covering both the capabilities and the activation scenarios effectively.

DimensionReasoningScore

Specificity

Lists multiple specific concrete actions: import, host, qualify, and text-enable phone numbers. Also mentions specific sub-actions like creating hosting orders, qualifying numbers for text-enablement, managing LOA workflows, and checking hosting order status.

3 / 3

Completeness

Clearly answers both 'what' (import, host, qualify, and text-enable phone numbers for Sinch SMS) and 'when' (explicit 'Use when...' clause listing five specific trigger scenarios: importing non-Sinch numbers as DCA, creating hosting orders, qualifying numbers, managing LOA workflows, checking status).

3 / 3

Trigger Term Quality

Includes strong natural keywords users would say: 'import', 'phone numbers', 'Sinch SMS', 'hosting orders', 'text-enable', 'DCA', 'LOA workflows', 'hosting order status', 'qualify'. These cover both domain-specific terms and natural language variations a developer working with Sinch would use.

3 / 3

Distinctiveness Conflict Risk

Highly distinctive with a clear niche: Sinch SMS phone number importing and hosting via a specific API. The combination of 'Sinch', 'Imported Numbers and Hosting Orders API', 'DCA', 'LOA workflows', and 'text-enablement' 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

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