Transformers
K-Dense-AI/scientific-agent-skills
Hugging Face Transformers for loading Hub models, running pipeline inference, text generation, and Trainer fine-tuning on NLP, vision, audio, and multimodal tasks.
Apply mainframe dependency transformations to COBOL code using a pre-generated transformation guide.
MITAuto-check passed
Install Mainframe Removal
$ npx skills add OpenHands/extensions --skill mainframe-removal -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install OpenHands/extensions mainframe-removal --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/OpenHands/extensions.git skills-src && mkdir -p .claude/skills && cp -r skills-src/plugins/cobol-modernization/skills/mainframe-removal .claude/skills/mainframe-removal && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "mainframe-removal" agent skill from https://github.com/OpenHands/extensions/tree/main/plugins/cobol-modernization/skills/mainframe-removal into .claude/skills/mainframe-removal/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "mainframe-removal", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/OpenHands/extensions/tree/main/plugins/cobol-modernization/skills/mainframe-removalType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add OpenHands/extensions --skill mainframe-removal -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install OpenHands/extensions mainframe-removal --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/OpenHands/extensions.git skills-src && mkdir -p .agents/skills && cp -r skills-src/plugins/cobol-modernization/skills/mainframe-removal .agents/skills/mainframe-removal && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "mainframe-removal" agent skill from https://github.com/OpenHands/extensions/tree/main/plugins/cobol-modernization/skills/mainframe-removal into .agents/skills/mainframe-removal/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "mainframe-removal", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add OpenHands/extensions --skill mainframe-removal -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install OpenHands/extensions mainframe-removal --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/OpenHands/extensions.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/plugins/cobol-modernization/skills/mainframe-removal .cursor/skills/mainframe-removal && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "mainframe-removal" agent skill from https://github.com/OpenHands/extensions/tree/main/plugins/cobol-modernization/skills/mainframe-removal into .cursor/skills/mainframe-removal/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "mainframe-removal", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/OpenHands/extensions.git --path plugins/cobol-modernization/skills/mainframe-removal--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add OpenHands/extensions --skill mainframe-removal -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install OpenHands/extensions mainframe-removal --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/OpenHands/extensions.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/plugins/cobol-modernization/skills/mainframe-removal .gemini/skills/mainframe-removal && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "mainframe-removal" agent skill from https://github.com/OpenHands/extensions/tree/main/plugins/cobol-modernization/skills/mainframe-removal into .gemini/skills/mainframe-removal/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "mainframe-removal", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install OpenHands/extensions mainframe-removalInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add OpenHands/extensions --skill mainframe-removal -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/OpenHands/extensions.git skills-src && mkdir -p .github/skills && cp -r skills-src/plugins/cobol-modernization/skills/mainframe-removal .github/skills/mainframe-removal && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "mainframe-removal" agent skill from https://github.com/OpenHands/extensions/tree/main/plugins/cobol-modernization/skills/mainframe-removal into .github/skills/mainframe-removal/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "mainframe-removal", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add OpenHands/extensions --skill mainframe-removal -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install OpenHands/extensions mainframe-removal --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/OpenHands/extensions.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/plugins/cobol-modernization/skills/mainframe-removal .opencode/skills/mainframe-removal && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "mainframe-removal" agent skill from https://github.com/OpenHands/extensions/tree/main/plugins/cobol-modernization/skills/mainframe-removal into .opencode/skills/mainframe-removal/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "mainframe-removal", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
mainframe-removal- GitHub stars
- 158
- Token cost
- ~520 tokens
- SKILL.md length
- 210 words
- Files
- 2 (incl. references)
- Skills in repo
- 78
- Repo updated
- First seen
- Licence
- MIT
At a glance
Apply mainframe dependency transformations to COBOL code using a pre-generated transformation guide.
- SKILL.md covers Transformation Requirements, Verification, Preserve and Checklist
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Mainframe Removal is an agent skill from OpenHands/extensions. Apply mainframe dependency transformations to COBOL code using a pre-generated transformation guide. Converts CICS/VSAM constructs to standard COBOL.
Its SKILL.md is about 520 tokens, which your agent loads only when the skill is triggered. The skill folder holds 2 other files, including reference files (for example `references/cics-transformation-examples.md`). Compatibility notes: Requires GnuCOBOL (cobc) for verification
The repository describes itself as: Public registry for OpenHands extensions. The licence is MIT.
Example prompts
- “/mainframe-removal”
Requirements
- Compatibility (from SKILL.md): Requires GnuCOBOL (cobc) for verification
What it can do on your machine
Read from SKILL.md and the folder at commit d008b81. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
No scripts in the folder and no shell commands in SKILL.md.
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Compatibility
Requires GnuCOBOL (cobc) for verification
From compatibility in the SKILL.md frontmatter.
Context cost
Mainframe Removal loads about 520 tokens when it runs, and up to ~722 if it reads all its reference files. Until then it costs about 42 tokens; SKILL.md has 210 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check passed
The automated check found no risky patterns in SKILL.md.
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.
SKILL.md
The full file from OpenHands/extensions at commit d008b81, republished under its MIT licence (© OpenHands). 210 words, ~520 tokens.
Download SKILL.mdSave it as
.claude/skills/mainframe-removal/SKILL.md (or your agent's skills folder). This skill also uses 1 other file; get the full folder from GitHub.- name
- mainframe-removal
- description
- Apply mainframe dependency transformations to COBOL code using a pre-generated transformation guide. Converts CICS/VSAM constructs to standard COBOL.
- compatibility
- Requires GnuCOBOL (cobc) for verification
- license
- MIT
- triggers
- remove mainframe, cobol transformation, cics removal, standard cobol
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 for before/after code examples.
Verification
After transformation:
- Code MUST compile without errors
- Test with valid input → should execute core business logic
- Test with missing/invalid files → should fail gracefully, not crash
Preserve
- All original business logic
- Data transformations and calculations
- Validation rules
Checklist
- All EXEC CICS commands replaced
- FILE STATUS declared for all files
- FILE STATUS checked after every I/O operation
- CLOSE statements in all code paths
- Code compiles successfully
- Basic test execution passes
© OpenHands, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
SKILL.md and 1 other file (references) in plugins/cobol-modernization/skills/mainframe-removal of OpenHands/extensions.
- SKILL.md
- references/cics-transformation-examples.md
Open the folder on GitHubat commit d008b81
Compare with similar skills
Mainframe Removal next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Mainframe Removal this skillOpenHands/extensions | 158 | — | ~520 | Automated safety check: Pass | MIT | |
| TransformersK-Dense-AI/scientific-agent-skills | 48k | 1 repos | ~2.8k | Automated safety check: Notes | Apache-2.0 | |
| Dependency Scanningsickn33/agentic-awesome-skills | 47k | 1 repos | ~2.4k | Automated safety check: Pass | MIT | |
| Dependency Checkruvnet/ruflo | 74k | — | ~258 | Automated safety check: Pass | MIT | |
| Dependency Updatecodewhale-hq/Codewhale | 41k | — | ~142 | Automated safety check: Pass | MIT | |
| Bump Sentry Dependencygetsentry/sentry | 46k | — | ~815 | Automated safety check: Pass | Custom licence |
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Dependency Update
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Bumps an existing Python dependency in getsentry/sentry through the repository's self-serve GitHub Actions workflow.
Logseq Dependency Upgrade
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Questions about Mainframe Removal
What does Mainframe Removal do?
Apply mainframe dependency transformations to COBOL code using a pre-generated transformation guide. Mainframe Removal is an agent skill from OpenHands/extensions. Apply mainframe dependency transformations to COBOL code using a pre-generated transformation guide.
How do I install Mainframe Removal in Claude Code?
Run `npx skills add OpenHands/extensions --skill mainframe-removal -a claude-code`. Or copy the skill folder (plugins/cobol-modernization/skills/mainframe-removal in OpenHands/extensions) into .claude/skills/mainframe-removal in your project. Claude Code loads it when a task matches its description.
How do I install Mainframe Removal in Codex?
Run `npx skills add OpenHands/extensions --skill mainframe-removal -a codex`. Or copy the skill folder (plugins/cobol-modernization/skills/mainframe-removal in OpenHands/extensions) into .agents/skills/mainframe-removal in your project. Codex loads it when a task matches its description.
Can I use Mainframe Removal in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add OpenHands/extensions --skill mainframe-removal -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/mainframe-removal, .gemini/skills/mainframe-removal, .github/skills/mainframe-removal and .opencode/skills/mainframe-removal in your project.
What does Mainframe Removal need to run?
SKILL.md names no scripts, command-line tools or credentials: Mainframe Removal is instructions for the agent only. Compatibility (from SKILL.md): Requires GnuCOBOL (cobc) for verification.
Does Mainframe Removal access the network?
SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.
Is Mainframe Removal safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.
What licence does Mainframe Removal use?
Mainframe Removal is published under the MIT licence (declared in SKILL.md). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Mainframe Removal use?
About 520 tokens (SKILL.md is roughly 2.1k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 202 tokens, read only when the agent opens those files.
What are the alternatives to Mainframe Removal?
Skills that share tags, products or a category with Mainframe Removal: Transformers (K-Dense-AI/scientific-agent-skills, 48k stars), Dependency Scanning (sickn33/agentic-awesome-skills, 47k stars), Dependency Check (ruvnet/ruflo, 74k stars) and Dependency Update (codewhale-hq/Codewhale, 41k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Mainframe Removal?
OpenHands (a GitHub organization) maintains it in OpenHands/extensions, which has 158 GitHub stars. The repository holds 78 skills in this directory. The repository was last updated on October 7, 2026.
Source: OpenHands/extensions on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.