sherpa-onnx-tts

Local text-to-speech via sherpa-onnx (offline, no cloud)

Install with Tessl CLI

npx tessl i github:attilaczudor/Test --skill sherpa-onnx-tts

What are skills?

1.51x

Review — 56%

Does it follow best practices?

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Evaluation — 100%

↑ 1.51x

Agent success when using this skill

Validation — 9 / 11 Passed

Validation for skill structure

SKILL.md

Review

Evals

Discovery

40%

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

The description identifies a specific tool and its key differentiator (offline/local), but lacks actionable detail about what operations it performs and critically missing explicit trigger guidance. The description reads more like a label than a selection guide for Claude choosing among multiple skills.

Suggestions

Add a 'Use when...' clause with trigger terms like 'TTS', 'text to speech', 'read aloud', 'convert text to audio', 'speech synthesis', 'offline voice'

List specific concrete actions such as 'Convert text to audio files, generate speech from documents, synthesize voice output'

Include common file format triggers like '.wav', '.mp3', 'audio file' if applicable

Dimension	Reasoning	Score
Specificity	Names the domain (text-to-speech) and the tool (sherpa-onnx), and clarifies it's offline/local, but doesn't list specific actions like 'convert text to audio files', 'adjust voice parameters', or 'batch process documents'.	2 / 3
Completeness	Describes what it is (text-to-speech via sherpa-onnx) but completely lacks a 'Use when...' clause or any explicit trigger guidance for when Claude should select this skill.	1 / 3
Trigger Term Quality	Includes 'text-to-speech' which users might say, but misses common variations like 'TTS', 'speech synthesis', 'read aloud', 'convert to audio', or 'voice generation' that users would naturally use.	2 / 3
Distinctiveness Conflict Risk	The specific tool name 'sherpa-onnx' and the 'offline, no cloud' qualifier create a clear niche that distinguishes it from other potential TTS skills or cloud-based alternatives.	3 / 3
	Total	8 / 12 Passed

Implementation

72%

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

This is a reasonably well-structured skill that efficiently communicates how to set up and use sherpa-onnx for local TTS. Its main weakness is the vague installation steps that don't specify download sources or commands, and the lack of validation steps to confirm successful setup before usage.

Suggestions

Add specific download URLs or commands for obtaining the runtime and voice models (e.g., 'Download from https://... or run `curl -O ...`')

Add a validation step after installation, such as 'Verify installation: `sherpa-onnx-tts --version` should output X.Y.Z'

Include a brief troubleshooting note for common failures (e.g., 'If you get "model not found", verify SHERPA_ONNX_MODEL_DIR points to a directory containing the .onnx file')

Dimension	Reasoning	Score
Conciseness	The content is lean and efficient, providing only essential setup and usage information without explaining what TTS is or how sherpa-onnx works internally. Every section serves a clear purpose.	3 / 3
Actionability	Provides concrete commands and config examples, but step 1 and 2 in Install are vague ('Download the runtime for your OS') without specifying where to download from or exact commands. The usage example is executable but setup steps lack specificity.	2 / 3
Workflow Clarity	Steps are listed in sequence (install runtime, download model, configure, run), but there's no validation checkpoint to verify the installation worked before proceeding to usage. No troubleshooting guidance if the command fails.	2 / 3
Progressive Disclosure	For a simple single-purpose skill under 50 lines, the content is well-organized with clear sections (Install, Usage) and appropriate inline notes for edge cases. No need for external file references given the scope.	3 / 3
	Total	10 / 12 Passed

Validation

81%

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 — 9 / 11 Passed

Validation for skill structure

Criteria	Description	Result
metadata_version	'metadata.version' is missing	Warning
metadata_field	'metadata' should map string keys to string values	Warning

	Total	9 / 11 Passed

Reviewed: 14 days ago

Table of Contents

Discovery Implementation Validation

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