interval-difference-analyzer

Analyze differences in program intervals between two versions of a program (old and new) to identify added, removed, or modified intervals. Use when comparing program versions, analyzing variable ranges, detecting behavioral changes in numeric computations, validating refactorings, or assessing migration impacts. Supports optional test suite integration to validate interval changes. Generates comprehensive reports highlighting intervals requiring further testing or verification.

1.85x

Quality

71%

Does it follow best practices?

Impact

100%

1.85x

Average score across 3 eval scenarios

Securityby

Passed

No known issues

Fix and improve this skill with Tessl

tessl review fix ./skills/interval-difference-analyzer/SKILL.md

Quality

Content

57%

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

The skill provides a reasonable structure for interval analysis with clear workflow steps and good progressive disclosure to external resources. However, it suffers from explaining concepts Claude already knows (what intervals are, why they matter) and lacks validation checkpoints in the workflow. The actionability is limited by referencing scripts without providing them or explaining their implementation.

Suggestions

Remove the 'What Are Program Intervals?' and 'Why intervals matter' sections - Claude understands these concepts; focus on the specific tool usage

Add validation checkpoints to the core workflow (e.g., 'Verify old_intervals.json was created successfully before proceeding')

Either provide the referenced scripts or clarify that they need to be created, with implementation guidance

Condense the 'Interval Comparison' and 'Behavioral Change Detection' sections into a more compact reference format

Dimension	Reasoning	Score
Conciseness	The skill includes some unnecessary explanations that Claude would already know (e.g., 'What Are Program Intervals?' section explaining basic concepts, 'Why intervals matter' list). The content could be tightened by removing conceptual explanations and focusing on the actionable workflow.	2 / 3
Actionability	Provides concrete bash commands and example code snippets, but the scripts referenced (interval_analyzer.py, compare_intervals.py, etc.) are not provided or explained. The commands are copy-paste ready but depend on tools that may not exist, making them pseudocode-like in practice.	2 / 3
Workflow Clarity	The core workflow has clear numbered steps, but lacks explicit validation checkpoints and error recovery. There's no 'if extraction fails, do X' or 'validate output before proceeding' guidance. For an analysis tool that could produce incorrect results, validation steps are important.	2 / 3
Progressive Disclosure	Good structure with a clear overview, core workflow upfront, and detailed sections following. References to external files (references/interval_analysis.md, scripts/) are one level deep and clearly signaled in the Resources section.	3 / 3
	Total	9 / 12 Passed

Description

85%

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 a well-structured description that clearly explains what the skill does and when to use it. The main weakness is the use of technical jargon ('program intervals', 'numeric computations') that users may not naturally use when requesting this functionality. The description would benefit from including more user-friendly trigger terms alongside the technical ones.

Suggestions

Add more natural language trigger terms users might say, such as 'value range analysis', 'bounds checking', 'numeric range comparison', or 'interval arithmetic'

Dimension	Reasoning	Score
Specificity	Lists multiple specific concrete actions: 'Analyze differences in program intervals', 'identify added, removed, or modified intervals', 'Supports optional test suite integration', 'Generates comprehensive reports'. These are clear, actionable capabilities.	3 / 3
Completeness	Clearly answers both what (analyze interval differences, identify changes, generate reports) AND when ('Use when comparing program versions, analyzing variable ranges, detecting behavioral changes...'). Has explicit 'Use when' clause with multiple trigger scenarios.	3 / 3
Trigger Term Quality	Includes some relevant terms like 'comparing program versions', 'variable ranges', 'refactorings', 'migration impacts', but uses technical jargon ('program intervals', 'numeric computations') that users may not naturally say. Missing common variations users might use.	2 / 3
Distinctiveness Conflict Risk	Very specific niche around 'program intervals' and 'variable ranges' - this is a specialized static analysis domain unlikely to conflict with general code comparison or document analysis skills. The combination of interval analysis + test suite integration creates a distinct identity.	3 / 3
	Total	11 / 12 Passed

Validation

100%

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 — 11 / 11 Passed

Validation for skill structure

No warnings or errors.

Repository: ArabelaTso/Skills-4-SE
Commit: 0f00a4f

Reviewed: 4 months ago

Table of Contents

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