Getting it into your agent
It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.
git clone --depth 1 https://github.com/DauQuangThanh/hanoi-rainbownpx agentmods add skills/dauquangthanh/hanoi-rainbow/rpg-migration-analyzerWrote 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/rpg-migration-analyzer)<a href="https://agentmods.dev/skills/dauquangthanh/hanoi-rainbow/rpg-migration-analyzer"><img src="https://agentmods.dev/badge/skills/dauquangthanh/hanoi-rainbow/rpg-migration-analyzer/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/rpg-migration-analyzer"><img src="https://agentmods.dev/badge/skills/dauquangthanh/hanoi-rainbow/rpg-migration-analyzer.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 | $0.00186 | $0.04282 |
| Opus 5.5 | $0.00074 | $0.01713 |
| Sonnet 5.5 | $0.00037 | $0.00856 |
| Haiku 4.5 | $0.00019 | $0.00428 |
Grade A, and why
rpg-migration-analyzer 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 1mo 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 — 427 lines — stays where its author put it; the contents beside it link to each section on GitHub.
RPG Migration Analyzer
Analyzes legacy RPG programs (RPG III/IV/ILE) from AS/400 and IBM i systems for migration to modern Java applications, extracting business logic, data structures, file operations, and generating actionable migration strategies.
Overview
This skill provides comprehensive analysis and migration planning for RPG (Report Program Generator) applications. It extracts program specifications, converts RPG data types to Java equivalents, maps file operations to modern database access patterns, and generates implementation-ready Java code structures.
Key Migration Focus: RPG to Java with proper handling of packed decimals (BigDecimal), data structures (POJOs), file operations (JPA/JDBC), indicators (boolean variables), and business logic preservation.
When to Use This Skill
Use this skill when:
- Analyzing RPG source files (.rpg, .rpgle, .RPGLE) for modernization
- Planning migration from AS/400 or IBM i systems to Java
- Converting RPG data structures (D-specs) to Java classes
- Mapping RPG file operations (F-specs) to database access patterns
- Understanding RPG program dependencies and call chains
- Generating Java code equivalents from RPG business logic
- Estimating complexity and effort for RPG migration projects
- Creating migration documentation and strategy reports
- Modernizing legacy mainframe applications to microservices
- User mentions: RPG analysis, AS/400 migration, IBM i modernization, Report Program Generator, packed decimal conversion
Core Capabilities
1. Program Analysis
Extract and analyze RPG program components:
- Specification types: H-spec (header/control), F-spec (file definitions), D-spec (data definitions), C-spec (calculation/logic), P-spec (procedures)
- Data structures: D-specs with nested structures, arrays (DIM), external references (EXTNAME), qualifiers (LIKEDS, QUALIFIED)
- File definitions: Physical files, logical files, display files (WORKSTN), printer files
- Business logic: Calculation specifications, control structures (IF/ELSE/DO/FOR), expressions (EVAL)
- Indicators: Legacy indicators (*IN01-*IN99), built-in indicators (*INLR,*INOF)
- Built-in functions: String functions (%SUBST, %TRIM, %SCAN), date functions (%DATE, %DAYS), math functions (%DEC, %INT), file status (%EOF, %FOUND, %ERROR)
- Error handling: %ERROR, %STATUS, ON-ERROR blocks
What ships with it
20 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.
- assets/java-class-template.java 2.3 KB
- assets/migration-report-template.md 5.0 KB
- references/messaging-integration.md 11 KB
- references/performance-patterns.md 5.8 KB
- references/pseudocode-common-rules.md 2.3 KB
- references/pseudocode-rpg-advanced.md 30 KB
- references/pseudocode-rpg-core-rules.md 7.3 KB
- references/pseudocode-rpg-data-structures.md 4.3 KB
- references/pseudocode-rpg-functions.md 3.4 KB
- references/pseudocode-rpg-migration-guide.md 14 KB
- references/pseudocode-rpg-patterns.md 15 KB
- references/pseudocode-rpg-rules.md 8.2 KB
- references/pseudocode-rpg-rules.md.backup 71 KB
- references/testing-strategy.md 13 KB
- references/transaction-handling.md 12 KB
- scripts/analyze-dependencies.ps1 5.0 KB runs code
- scripts/analyze-dependencies.sh 5.3 KB runs code
- scripts/estimate-complexity.py 9.2 KB runs code
- scripts/extract-structure.py 10 KB runs code
- scripts/generate-java-classes.py 10 KB runs code
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.
- 1mo ago First seen · 427 lines · 186 tokens per session scan A f2dbf8fa552a
rpg-migration-analyzer is a skill published in the GitHub repository DauQuangThanh/hanoi-rainbow (17 stars, last pushed 9mo ago), licensed MIT. It adds 186 tokens to every session and 4,282 once invoked, about $0.0007 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.
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