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.
npx skills add DauQuangThanh/hanoi-rainbow --skill system-migrationgit clone --depth 1 https://github.com/DauQuangThanh/hanoi-rainbowWrote 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.
[](https://agentmods.dev/skills/dauquangthanh/hanoi-rainbow/system-migration)<a href="https://agentmods.dev/skills/dauquangthanh/hanoi-rainbow/system-migration"><img src="https://agentmods.dev/badge/skills/dauquangthanh/hanoi-rainbow/system-migration/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.
<a href="https://agentmods.dev/skills/dauquangthanh/hanoi-rainbow/system-migration"><img src="https://agentmods.dev/badge/skills/dauquangthanh/hanoi-rainbow/system-migration.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00128 | $0.01152 |
| Opus 5 | $0.00064 | $0.00576 |
| Sonnet 5 | $0.00026 | $0.00230 |
| Haiku 4.5 | $0.00013 | $0.00115 |
Grade A, and why
system-migration 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 10d 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.
How it starts
The opening of the file, as written. The whole thing — 125 lines — stays where its author put it; the contents beside it link to each section on GitHub.
System Migration
Overview
Provides comprehensive guidance for system-level migrations including operating system changes, hardware platform transitions, mainframe modernization, virtualization, and data center migrations. Focuses on system infrastructure that underlies applications and platforms.
Key Points:
- System migrations often involve multiple skills: OS + database + application coordination
- Plan for 30-50% more time than initial estimates
- Parallel run periods reduce risk but increase cost
- Mainframe migrations are typically multi-year projects
- Physical to virtual conversions rarely have issues with modern hardware
- Always validate hardware compatibility before OS migrations
Workflow Decision Tree
Choose your migration path based on the system type:
1. Operating System Migration
Use for: Linux distribution changes, Windows to Linux, OS version upgrades Load: migration-types.md for detailed workflows
2. Hardware Platform Migration
Use for: Mainframe to x86, architecture changes, system consolidation Load: migration-types.md for platform-specific guidance
3. Virtualization Migration
Use for: Physical to Virtual (P2V), Virtual to Virtual (V2V), cloud migrations Load: migration-types.md for virtualization patterns
4. Data Center Migration
Use for: Facility moves, infrastructure consolidation, hybrid cloud Load: migration-types.md for data center procedures
Standard Migration Workflow
Phase 1: Assessment & Planning
- Document current system state (OS version, kernel, packages, services, configurations)
- Identify application and hardware compatibility requirements
- Determine migration strategy (in-place upgrade vs fresh install)
- Create detailed migration plan with timeline and resources
Phase 2: Preparation
- Complete full system backups (OS, configurations, data)
- Set up target system environment
- Test migration procedures in non-production
- Prepare rollback plan and validation criteria
What ships with it
7 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 10d ago First seen · 125 lines · 128 tokens per session scan A 64e856970e89
system-migration is a skill published in the GitHub repository DauQuangThanh/hanoi-rainbow (16 stars, last pushed 7mo ago), licensed MIT. It adds 128 tokens to every session and 1,152 once invoked, about $0.0006 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 2026-08-31.
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