modernize-brief

modernize-brief is a skill for Claude Code from MinhThang1009/dotclaude. It costs 44 tokens per session (611 once invoked), scanned A, original, MIT.

A guide for producing a Modernization Brief: an approved plan for replacing or updating an older software system in stages.

In plain words
What is it for?
It is for defining the target architecture, mapping old components to new ones, and sequencing three to six modernization phases with start and completion criteria.
Why use it?
It turns separate system assessments, diagrams, and extracted business rules into a plan that a steering committee can approve and engineers can follow.

Skill for Claude Code

Written for Claude Code: argument-hint in frontmatter. Also seen: positional $N argument.

Part of the code-modernization plugin — 7 skills, 5 agents shipped together

Good fit It is for defining the target architecture, mapping old components to new ones, and sequencing three to six modernization phases with start and completion criteria.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/minhthang1009/dotclaude/modernize-brief
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.

Any agent
npx skills add MinhThang1009/dotclaude --skill modernize-brief
Clone the repo
git clone --depth 1 https://github.com/MinhThang1009/dotclaude

Made for: Claude Code.

Or install code-modernization, the plugin that ships this one along with the rest of its 7 skills, 5 agents.

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 modernize-brief

README.md
[![agentmods](https://agentmods.dev/badge/skills/minhthang1009/dotclaude/modernize-brief/github.svg)](https://agentmods.dev/skills/minhthang1009/dotclaude/modernize-brief)
Your own site
<a href="https://agentmods.dev/skills/minhthang1009/dotclaude/modernize-brief"><img src="https://agentmods.dev/badge/skills/minhthang1009/dotclaude/modernize-brief/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 modernize-brief

Your own site · 80×15
<a href="https://agentmods.dev/skills/minhthang1009/dotclaude/modernize-brief"><img src="https://agentmods.dev/badge/skills/minhthang1009/dotclaude/modernize-brief.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 44 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 611 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 $0.00044 $0.00611
Opus 5 $0.00022 $0.00305
Sonnet 5 $0.00009 $0.00122
Haiku 4.5 $0.00004 $0.00061

Measured 9d ago against content hash 8f2e77c86df4, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

modernize-brief 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 9d 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.

plugins/code-modernization/skills/modernize-brief/SKILL.md · 67 lines

How it starts

The opening of the file, as written. The whole thing — 67 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Synthesize everything in analysis/$1/ into a Modernization Brief — the single document a steering committee approves and engineering executes.

Target stack: $2 (if blank, recommend one based on the assessment findings).

Read analysis/$1/ASSESSMENT.md, analysis/$1/TOPOLOGY.html (and the .mmd files alongside it), and analysis/$1/BUSINESS_RULES.md first. If any are missing, say so and stop — they come from /modernize-assess, /modernize-map, and /modernize-extract-rules respectively. Run those first.

The Brief

Write analysis/$1/MODERNIZATION_BRIEF.md:

1. Objective

One paragraph: from what, to what, why now.

2. Target Architecture

Mermaid C4 Container diagram of the end state. Name every service, data store, and integration. Below it, a table mapping legacy component → target component(s).

3. Phased Sequence

Break the work into 3-6 phases using strangler-fig ordering — lowest-risk, fewest-dependencies first. For each phase:

  • Scope (which legacy modules, which target services)
  • Entry criteria (what must be true to start)
  • Exit criteria (what tests/metrics prove it's done)
  • Estimated effort (person-weeks, derived from COCOMO + complexity data)
  • Risk level + top 2 risks + mitigation

Render the phases as a Mermaid gantt chart.

4. Behavior Contract

List the P0 rules from BUSINESS_RULES.md (the ones tagged Priority: P0 — money, regulatory, data integrity) that MUST be proven equivalent before any phase ships. These become the regression suite. Flag any P0 rule with Confidence < High as a blocker requiring SME confirmation before its phase starts.

5. Validation Strategy

State which combination applies: characterization tests, contract tests, parallel-run / dual-execution diff, property-based tests, manual UAT. Justify per phase.

6. Open Questions

Anything requiring human/SME decision before Phase 1 starts. Each as a checkbox the approver must tick.

7. Approval Block

Approved by: ________________  Date: __________
Approval covers: Phase 1 only | Full plan

Read the full file on GitHub · 67 lines

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. 9d ago First seen · 67 lines · 44 tokens per session scan A 8f2e77c86df4

Subscribe to this mod's changes

modernize-brief is a skill published in the GitHub repository MinhThang1009/dotclaude (20 stars, last pushed 1mo ago), licensed MIT. It adds 44 tokens to every session and 611 once invoked, about $0.0002 per session on Opus 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 2026-08-30.

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