mainframe-removal SKILL.md skillA
mainframe-removal 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/mainframe-removal@git:20260621.c72f462Pins git:20260621.c72f462 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- openhands/extensions
- Path
plugins/cobol-modernization/skills/mainframe-removal/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260621.c72f462, committed Jun 21, 2026
- Size
- 2,082 bytes
- Repository stars
- 179
- License
- MIT
Apply mainframe dependency transformations to COBOL code using a pre-generated transformation guide. Converts CICS/VSAM constructs to standard COBOL.
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
Apply the transformations from a transformation guide to convert mainframe-specific COBOL to standard COBOL. **Prerequisite**: A transformation guide must exist (see `cobol-mainframe-planning` skill). ## Transformation Requirements ### Data Operations - Replace each CICS/VSAM construct with its standard COBOL equivalent per the plan - Add FILE STATUS checks after EVERY file operation: - Check for success (00) before proceeding - Handle "not found" (23) distinctly from I/O errors (3x) - Handle "file not exists" (35) at OPEN time - Add explicit CLOSE statements in all code paths (including error paths) ### UI/Terminal Operations (BMS maps, SEND/RECEIVE) - Replace with simple stubs or ACCEPT/DISPLAY statements - Do NOT spend time replicating screen layouts - Focus on preserving data flow, not UI fidelity ### Error Handling - Replace CICS RESP/RESP2 checks with equivalent FILE STATUS logic - Replace HANDLE CONDITION with explicit status checking after operations - Ensure error paths don't leave files open See [references/cics-transformation-examples.md](references/cics-transformation-examples.md) for before/after code examples. ## Verification After transformation: …
Read the whole file at its exact version.
How to install
mdr add openhands/extensions/mainframe-removal@sha256:bf0c95e28074dd27The line at the top of this page pins the label git:20260621.c72f462, 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_6btgqtllxce4dw7b)
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Versions
The registry has recorded 1 version of this file, committed on Jun 21, 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 (2082 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_6btgqtllxce4dw7b GET https://markdownregistry.com/api/v1/resolve?ref=openhands/extensions/mainframe-removal GET https://markdownregistry.com/api/v1/blob/bf0c95e28074dd27c4c2facb31783ef079e9dcb551eec8f84a554e845556f2f3
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.