migration-mapping SKILL.md skillA
migration-mapping from openhands/extensions is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add openhands/extensions/migration-mapping@git:20260306.cebd78bPins git:20260306.cebd78b in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- openhands/extensions
- Path
plugins/migration-scoring/skills/migration-mapping/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260306.cebd78b, committed Mar 6, 2026
- Size
- 2,284 bytes
- Repository stars
- 179
- License
- MIT
Create a mapping from source language files to target language files for code migrations. Use when evaluating or documenting a migration project.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
Create a mapping from source language files (e.g., COBOL) to target language files (e.g., Java) to document which target files implement the functionality of each source file.
## Task
Examine all source language files and identify the corresponding target language files that implement the same functionality. This mapping is essential for:
- Migration quality evaluation
- Traceability documentation
- Gap analysis
## Output Format
Save the mapping as a JSON file with this structure:
```json
{
"source_file_1.cbl": ["target_file_a.java", "target_file_b.java"],
"source_file_2.cbl": ["target_file_c.java"],
"source_file_3.cbl": []
}
```
## Rules
1. **Many-to-many mapping**: A source file may map to multiple target files, and a target file may implement logic from multiple source files
2. **Complete coverage**: EVERY source file must appear as a key in the mapping
3. **Complete target coverage**: EVERY target file should appear as a value at least once
4. **Empty arrays**: If a source file has no corresponding target implementation, use an empty array `[]`
5. **Incremental**: If a mapping file already exists, update it rather than replacing it
## How to Identify Mappings
…Read the whole file at its exact version.
How to install
mdr add openhands/extensions/migration-mapping@sha256:6b65c7e6b15576bdThe line at the top of this page pins the label git:20260306.cebd78b, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_lndl4hstydfqnms3)
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Versions
The registry has recorded 1 version of this file, committed on Mar 6, 2026.
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (2284 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
openhands/extensions · 179 stars · license MIT · pushed 2026-11-08 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_lndl4hstydfqnms3 GET https://markdownregistry.com/api/v1/resolve?ref=openhands/extensions/migration-mapping GET https://markdownregistry.com/api/v1/blob/6b65c7e6b15576bd97506ae0ee10e0a6bbb24ed1b2d5946232b2b9b9a540bca1
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.