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legacy-audit

legacy-audit is a command for Claude Code from CrashBytes/claude-role-skills. It costs 7 tokens per session (392 once invoked), scanned A, original, Apache-2.0.

A codebase audit for judging whether a legacy system is ready for modernization. It examines technologies, dependencies, tests, documentation, architecture, code health, and security.

In plain words
What is it for?
Use it to inventory languages and frameworks, find outdated dependencies and known vulnerabilities, assess test coverage and documentation, examine coupling and service boundaries, and rate modernization readiness.
Why use it?
It shows what makes an older system difficult or risky to change and helps identify which modernization work should come first.

Command for Claude Code

Written for Claude Code: allowed-tools in frontmatter.

Part of the role-based-skills plugin — 7 skills, 15 commands shipped together

not rated 8repo 8mo ago A scan 7 tokens original Apache-2.0

Good fit Use it to inventory languages and frameworks, find outdated dependencies and known vulnerabilities, assess test coverage and documentation, examine coupling and service boundaries, and rate modernization readiness.

Compare 6 commands from other repositories ↓
Install with agentmods
npx agentmods add commands/crashbytes/claude-role-skills/legacy-audit
View source ↗ CrashBytes/claude-role-skills
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Clone the repo
git clone --depth 1 https://github.com/CrashBytes/claude-role-skills

Made for: Claude Code.

Or install role-based-skills, the plugin that ships this one along with the rest of its 7 skills, 15 commands.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for legacy-audit

README.md
[![agentmods](https://agentmods.dev/badge/commands/crashbytes/claude-role-skills/legacy-audit/github.svg)](https://agentmods.dev/commands/crashbytes/claude-role-skills/legacy-audit)
Your own site
<a href="https://agentmods.dev/commands/crashbytes/claude-role-skills/legacy-audit"><img src="https://agentmods.dev/badge/commands/crashbytes/claude-role-skills/legacy-audit/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for legacy-audit

Your own site · 80×15
<a href="https://agentmods.dev/commands/crashbytes/claude-role-skills/legacy-audit"><img src="https://agentmods.dev/badge/commands/crashbytes/claude-role-skills/legacy-audit.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 7 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 392 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00007 $0.00392
Opus 5.5 $0.00003 $0.00157
Sonnet 5.5 $0.00001 $0.00078
Haiku 4.5 $0.00001 $0.00039

Measured 2mo ago against content hash ebf0ce0831d8, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

legacy-audit scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2mo ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

commands/legacy-audit.md · 57 lines

What it actually says

Legacy System Audit

Audit a codebase to assess modernization readiness and identify migration priorities.

Arguments

Target to audit: $ARGUMENTS

Workflow

  1. Inventory the system

    • Scan the codebase structure and file types
    • Identify languages, frameworks, and their versions
    • Map dependency graph (direct and transitive)
    • Detect deprecated APIs and end-of-life dependencies

  2. Assess code health

    • Estimate test coverage (presence and quality of test files)
    • Check for documentation (README, API docs, inline comments)
    • Identify code smells: god classes, long methods, circular dependencies
    • Check for hardcoded configuration, magic numbers, dead code

  3. Evaluate architecture

    • Monolith vs modular vs microservices
    • Coupling analysis: how tightly are components connected?
    • Identify natural service boundaries (bounded contexts)
    • Database structure: single DB, shared schemas, data ownership

  4. Security assessment

    • Outdated dependencies with known CVEs
    • Authentication and authorization patterns
    • Secret management practices
    • Input validation and output encoding

  5. Score modernization readiness Rate each dimension 1-5:

    • Code quality and maintainability
    • Test coverage and confidence
    • Documentation completeness
    • Architecture modularity
    • Dependency health
    • Security posture
    • Team knowledge and skills

  6. Output

    • System inventory summary
    • Health scorecard (radar chart dimensions)
    • Top 10 modernization priorities ranked by impact and effort
    • Recommended migration approach (based on scores)
    • Quick wins that can be done before a full migration
Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 2mo ago First seen · 57 lines · 7 tokens per session scan A ebf0ce0831d8

Subscribe to this mod's changes

legacy-audit is a command published in the GitHub repository CrashBytes/claude-role-skills (8 stars, last pushed 8mo ago), licensed Apache-2.0. It adds 7 tokens to every session and 392 once invoked, about $0.0000 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

Claude CodeCode reviewagent-skillsclaude-pluginclaude-skillsinfosec
Related

legacy-audit compared with commands from other repositories

legacy-audit next to 6 commands from other repositories
ModTypeStarsLast pushLicenceScanTokensWorks with
legacy-auditCrashBytes/claude-role-skillsCommand88mo agoApache-2.0A7Claude Code
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reviewjjmartres/ai-coding-agentsCommand4820d agoMITA3Claude Code
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resolve-reviewsergeyklay/.agentsCommand66d agoApache-2.0A15Claude Code
pr-descriptionAmey-Thakur/AI-SKILLSCommand142mo agoMITA23Claude Code
refactor-codeAmey-Thakur/AI-SKILLSCommand142mo agoMITA17Claude Code