diff-analysis

Methodology for categorizing changes, assessing risks, and creating summaries from any changeset. Triggers: diff analysis, changeset review, risk assessment, change categorization, semantic analysis, release preparation, change summary, git diff Use when: analyzing specific changesets, assessing risk of changes, preparing release notes, categorizing changes by type and impact DO NOT use when: quick context catchup - use catchup instead. DO NOT use when: full PR review - use review-core with pensive skills. Use this skill for systematic change analysis with risk scoring.

Install with Tessl CLI

npx tessl i github:majiayu000/claude-skill-registry-data --skill diff-analysis

What are skills?

1.05x

Review — 87%

Does it follow best practices?

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Evaluation — 98%

↑ 1.05x

Agent success when using this skill

Validation — 10 / 11 Passed

Validation for skill structure

SKILL.md

Review

Evals

Evaluation results

100%

Release Notes for Payment Service v2.1.0

4-step methodology and structured summary

Criteria

Without context

With context

Summary theme

100%

Scope with counts

40%

100%

Risk level present

100%

Review focus

100%

Dependencies noted

100%

Semantic type grouping

100%

Baseline established

100%

Risk indicators identified

100%

Risk assessment step

100%

Downstream format

100%

Without context: $0.2246 · 1m 7s · 12 turns · 19 in / 3,250 out tokens

With context: $0.4862 · 1m 57s · 24 turns · 153 in / 6,800 out tokens

97%

Pre-Deployment Configuration Change Review

Semantic change categorization and risk scoring

Criteria

Without context

With context

Semantic categories used

100%

Risk indicators identified

100%

Risk level assigned

100%

Scope with counts

100%

Review focus specified

100%

Dependencies section

60%

100%

Baseline defined

100%

Theme stated

50%

70%

Risk reasoning present

100%

Downstream format

100%

Without context: $0.1794 · 1m 11s · 8 turns · 13 in / 3,862 out tokens

With context: $0.5940 · 2m 28s · 29 turns · 33 in / 8,462 out tokens

98%

API Migration Analysis: Inventory Service v1 → v2

Baseline establishment and risk level assessment

Criteria

Without context

With context

Comparison states named

100%

Analysis boundary defined

80%

Scale metrics included

100%

Semantic type grouping

100%

Risk level assigned

100%

Risk scoring reasoning

80%

100%

Summary theme

100%

Review focus named

100%

Dependencies noted

100%

Downstream format

100%

Without context: $0.2060 · 1m 20s · 8 turns · 13 in / 4,226 out tokens

With context: $0.4809 · 2m · 21 turns · 26 in / 6,593 out tokens

Evaluated: about 24 hours ago
Agent: Claude Code

Table of Contents

Release Notes for Payment Service v2.1.0 Pre-Deployment Configuration Change Review API Migration Analysis: Inventory Service v1 → v2

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