legacy-code-summarizer

Produces comprehensive summaries and insights about legacy codebases to help understand unfamiliar code. Use when onboarding to a new project, planning refactoring efforts, assessing code for acquisition/migration, or generating documentation for undocumented systems. Analyzes architecture, dependencies, code quality issues, and test coverage. Creates high-level overviews with architecture diagrams, key components, entry points, and actionable insights for understanding and improving legacy code.

Install with Tessl CLI

npx tessl i github:ArabelaTso/Skills-4-SE --skill legacy-code-summarizer

What are skills?

Review — 75%

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Validation — 10 / 11 Passed

Validation for skill structure

SKILL.md

Review

Evals

Evaluation results

94%

Onboarding Documentation for TaskTracker API

Full legacy codebase summary report

Criteria

Without context

With context

Executive Summary present

85%

100%

Key Metrics block

80%

Architecture Overview section

100%

ASCII architecture diagram

44%

100%

Architecture pattern identified

100%

Dependency map format

55%

Entry Points section

100%

Code Quality section

100%

Test Coverage section

100%

Three-timeframe recommendations

70%

100%

Quick Reference section

100%

Specific file references

100%

Without context: $0.2226 · 1m 45s · 9 turns · 14 in / 4,021 out tokens

With context: $0.6341 · 2m 52s · 14 turns · 7,046 in / 6,601 out tokens

84%

11%

Technical Due Diligence: DataProcessor Acquisition Assessment

Code quality audit with severity prioritization

Criteria

Without context

With context

Severity categorization

100%

File size thresholds

Function length threshold

Hardcoded credentials identified

100%

SQL injection detected

100%

Silent exception handling

100%

Magic numbers identified

100%

Code duplication identified

100%

TODO/FIXME/HACK count

62%

100%

Test coverage target stated

100%

Specific file/line references

100%

Security issues classified Critical

100%

Without context: $0.5055 · 3m 10s · 20 turns · 26 in / 8,745 out tokens

With context: $0.8188 · 3m 38s · 23 turns · 6,604 in / 9,625 out tokens

94%

13%

Architecture Analysis for OrderSystem Microservices Migration

Architecture and dependency mapping

Criteria

Without context

With context

Architecture pattern named

80%

100%

Architecture template used

70%

ASCII architecture diagram

100%

Dependency map format

41%

100%

Circular dependency detected

100%

Circular dep resolution strategy

100%

Highly coupled modules flagged

75%

100%

External vs internal deps distinguished

37%

62%

File paths in dependency map

100%

Microservice extraction candidates

100%

Without context: $0.2041 · 1m 44s · 8 turns · 13 in / 4,370 out tokens

With context: $0.5185 · 1m 48s · 14 turns · 5,146 in / 5,678 out tokens

Evaluated: about 20 hours ago
Agent: Claude Code

Table of Contents

Onboarding Documentation for TaskTracker API Technical Due Diligence: DataProcessor Acquisition Assessment Architecture Analysis for OrderSystem Microservices Migration

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