phase-4-modernization-plan

phase-4-modernization-plan is a command for Claude Code from Burly-Mingo/modernization-kit. It costs 0 tokens per session (505 once invoked), scanned A, original, MIT.

A guide for turning a proposed software architecture into a phased plan for building, migrating, and releasing the system.

In plain words
What is it for?
Use it to plan migration phases, data moves, cutovers, rollback steps, monitoring, and timeline estimates for modernising applications.
Why use it?
It connects high-level design decisions to concrete work, dependencies, risks, validation, and release planning.

Command for Claude Code

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.

agentmods
npx agentmods add commands/burly-mingo/modernization-kit/phase-4-modernization-plan
Clone the repo
git clone --depth 1 https://github.com/Burly-Mingo/modernization-kit

Made for: Claude Code.

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 phase-4-modernization-plan

README.md
[![agentmods](https://agentmods.dev/badge/commands/burly-mingo/modernization-kit/phase-4-modernization-plan.svg)](https://agentmods.dev/commands/burly-mingo/modernization-kit/phase-4-modernization-plan)
Your own site
<a href="https://agentmods.dev/commands/burly-mingo/modernization-kit/phase-4-modernization-plan"><img src="https://agentmods.dev/badge/commands/burly-mingo/modernization-kit/phase-4-modernization-plan.svg" alt="Measured on agentmods" height="20"></a>
Per session 0 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 505 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00000 $0.00505
Opus 5 $0.00000 $0.00253
Sonnet 5 $0.00000 $0.00101
Haiku 4.5 $0.00000 $0.00051

Measured 5d ago against content hash 250c1f3bc2a8, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

phase-4-modernization-plan 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 5d 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.

.claude/commands/phase-4-modernization-plan.md · 40 lines

How it starts

The opening of the file, as written. The whole thing — 40 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Phase 4: Modernization Plan

Turn the target architecture into an actionable, phased implementation plan.

Plan Components

1. Migration Phases: For each — what gets built, dependencies, data migration, deliverable (working functionality), effort estimate, risk factors, validation criteria. Order: security first → foundation → highest-pain-point modules → revenue/cost-saving → nice-to-haves. Each phase independently valuable.

2. Data Migration Strategy: Per-database/schema plan. Identity/auth migration (always hardest). Transformations. Validation. Rollback. ETL/job replacement.

3. Cutover Strategy: Build-then-cutover vs. parallel vs. strangler fig (justify). Independent cutover components. Downtime. DNS/routing. Rollback. Post-cutover monitoring.

4. Timeline Estimates:

  • AI-assisted development estimates
  • Traditional development estimates (comparison)
  • Logistics overhead by org size:
    • Small (<50): hardware procurement/setup, cloud/license setup. 1.3-1.5x multiplier.
    • Mid-size (50-500): procurement, approval gates, change management, legal review. 1.5-2x.
    • Large/enterprise (500+): capital budget cycles, RFP, architecture/security review boards, cross-team coordination, environment provisioning queues. 2-3x.
  • Realistic calendar = development × logistics multiplier
  • Long-lead-time items to start immediately

5. Cost Estimates: Development (labor). Infrastructure. Ongoing operational. Cost of doing nothing (1, 3, 5 year). Licensing eliminated.

6. Risk Assessment: Each risk: description, probability, impact, mitigation, contingency. Must include: key person dependency, scope creep, data migration errors, integration breakage, performance regression, user adoption, vendor risk, timeline/budget overrun.

7. Value-Add Features: Beyond 1:1 replacement — AI automation, analytics, customer-facing improvements, API/integration, competitive advantages. For each: what, impact, effort, phase, dependencies, ROI.

8. Open Questions: Everything unknown with assumption, why it matters, how to resolve, what changes if wrong.

Read the full file on GitHub · 40 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. 5d ago First seen · 40 lines · 0 tokens per session scan A 250c1f3bc2a8

Subscribe to this mod's changes

phase-4-modernization-plan is a command published in the GitHub repository Burly-Mingo/modernization-kit (11 stars, last pushed 6mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 505 tokens. 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.