Wasm Build
fair-acc/gnuradio4
Configure and run the local Emscripten/WebAssembly build with ONNX Runtime, including the tests.
Build and install v86 (wasm + libv86.js + BIOS) into windows95.
Install Update V86
$ npx skills add felixrieseberg/windows95 --skill update-v86 -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install felixrieseberg/windows95 update-v86 --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/felixrieseberg/windows95.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.claude/skills/update-v86 .claude/skills/update-v86 && 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 "update-v86" agent skill from https://github.com/felixrieseberg/windows95/tree/main/.claude/skills/update-v86 into .claude/skills/update-v86/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "update-v86", 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/felixrieseberg/windows95/tree/main/.claude/skills/update-v86Type 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 felixrieseberg/windows95 --skill update-v86 -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install felixrieseberg/windows95 update-v86 --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/felixrieseberg/windows95.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.claude/skills/update-v86 .agents/skills/update-v86 && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "update-v86" agent skill from https://github.com/felixrieseberg/windows95/tree/main/.claude/skills/update-v86 into .agents/skills/update-v86/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "update-v86", 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 felixrieseberg/windows95 --skill update-v86 -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install felixrieseberg/windows95 update-v86 --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/felixrieseberg/windows95.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.claude/skills/update-v86 .cursor/skills/update-v86 && 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 "update-v86" agent skill from https://github.com/felixrieseberg/windows95/tree/main/.claude/skills/update-v86 into .cursor/skills/update-v86/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "update-v86", 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/felixrieseberg/windows95.git --path .claude/skills/update-v86--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 felixrieseberg/windows95 --skill update-v86 -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install felixrieseberg/windows95 update-v86 --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/felixrieseberg/windows95.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.claude/skills/update-v86 .gemini/skills/update-v86 && 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 "update-v86" agent skill from https://github.com/felixrieseberg/windows95/tree/main/.claude/skills/update-v86 into .gemini/skills/update-v86/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "update-v86", 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 felixrieseberg/windows95 update-v86Installs 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 felixrieseberg/windows95 --skill update-v86 -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/felixrieseberg/windows95.git skills-src && mkdir -p .github/skills && cp -r skills-src/.claude/skills/update-v86 .github/skills/update-v86 && 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 "update-v86" agent skill from https://github.com/felixrieseberg/windows95/tree/main/.claude/skills/update-v86 into .github/skills/update-v86/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "update-v86", 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 felixrieseberg/windows95 --skill update-v86 -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install felixrieseberg/windows95 update-v86 --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/felixrieseberg/windows95.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.claude/skills/update-v86 .opencode/skills/update-v86 && 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 "update-v86" agent skill from https://github.com/felixrieseberg/windows95/tree/main/.claude/skills/update-v86 into .opencode/skills/update-v86/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "update-v86", 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
update-v86- GitHub stars
- 24k
- Token cost
- ~1.7k tokens
- SKILL.md length
- 735 words
- Files
- 1
- Skills in repo
- 3
- Repo updated
- First seen
- Licence
- Custom licence
At a glance
Build and install v86 (wasm + libv86.js + BIOS) into windows95.
- Works in 5 steps: await import("node:...") still present →… → master.features_reg= missing in minified… → Export pattern changed →… → …
- Pulling upstream v86 changes
- SKILL.md covers Sources, The fork branch, Prerequisites and Steps, plus 4 more sections
- Calls git, node and make; reaches repo1.maven.org
What it does
Update V86 is an agent skill from felixrieseberg/windows95. Build and install v86 (wasm + libv86.js + BIOS) into windows95. Use when pulling upstream v86 changes, fixing a broken build, verifying the fork branches are still in sync, or setting up a fresh v86 checkout.
Its SKILL.md is about 1.7k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.
It sits in Testing & QA, covering Failing and flaky tests. It works with WebAssembly. The repository describes itself as: Windows 95 in an app. Runs on macOS, Linux, and Windows.
When your agent uses it
- Pulling upstream v86 changes
- Fixing a broken build
- Verifying the fork branches are still in sync
- Setting up a fresh v86 checkout
Example prompts
- “/update-v86”
Workflow steps
5 steps, taken from the first numbered list in SKILL.md.
- await import("node:...") still present → PR #1540 was reverted
- master.features_reg= missing in minified → PR #1541 was reverted
- Export pattern changed → tools/parcel-build.js shim needs
- tcp-connection event gone → SMB falls back to the old-API theft
- on_tcp_connection gone → old-API fallback is dead. SMB integration
What it can do on your machine
Read from SKILL.md and the folder at commit 051065e. 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
Shell commands in SKILL.md call:
gitnodemakebrewcurl
From the folder's file list and the shell code blocks in SKILL.md.
Network
Hosts in commands or code, which the agent is likely to contact:
repo1.maven.org
Also links to:
github.com
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.
Context cost
Update V86 loads about 1.7k tokens when it runs. Until then it costs about 55 tokens; SKILL.md has 735 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
Its licence (Custom licence) doesn't allow us to republish the file, so here is its outline and opening line. It has 735 words (~1,706 tokens).
“windows95 builds v86 from source — not from copy.sh. Two small bugfix patches ride along on a fork branch until the upstream PRs land.”
- name
- update-v86
Files
Just SKILL.md in .claude/skills/update-v86 of felixrieseberg/windows95.
Open the folder on GitHubat commit 051065e
Compare with similar skills
Update V86 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 |
|---|---|---|---|---|---|---|
| Update V86 this skillfelixrieseberg/windows95 | 24k | — | ~1.7k | Automated safety check: Pass | Custom licence | |
| Wasm Buildfair-acc/gnuradio4 | 115 | — | ~394 | Automated safety check: Pass | LGPL-3.0 | |
| Git Upstream Syncwado-lang/wado | 117 | — | ~855 | Automated safety check: Pass | MIT | |
| Fix Errorswarpdotdev/common-skills | 611 | — | ~1.4k | Automated safety check: Pass | MIT | |
| Flowfile Node DevelopmentEdwardvaneechoud/Flowfile | 375 | — | ~9.3k | Automated safety check: Pass | MIT | |
| Pester Failure AnalysisPowerShell/PowerShell | 56k | — | ~5.1k | Automated safety check: Pass | MIT |
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Flowfile Node Development
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End-to-end runbook for adding or modifying a Flowfile node type across all four layers (flowfilecore settings/graph/template, flowfilefrontend UI registry, flowfileframe Python API, flowfilewasm…
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Related
Works with
Categories
Questions about Update V86
What does Update V86 do?
Build and install v86 (wasm + libv86.js + BIOS) into windows95. Update V86 is an agent skill from felixrieseberg/windows95.js + BIOS) into windows95.
When should I use Update V86?
Update V86 fits situations like: pulling upstream v86 changes; fixing a broken build; verifying the fork branches are still in sync; setting up a fresh v86 checkout.
How do I install Update V86 in Claude Code?
Run `npx skills add felixrieseberg/windows95 --skill update-v86 -a claude-code`. Or copy the skill folder (.claude/skills/update-v86 in felixrieseberg/windows95) into .claude/skills/update-v86 in your project. Claude Code loads it when a task matches its description.
How do I install Update V86 in Codex?
Run `npx skills add felixrieseberg/windows95 --skill update-v86 -a codex`. Or copy the skill folder (.claude/skills/update-v86 in felixrieseberg/windows95) into .agents/skills/update-v86 in your project. Codex loads it when a task matches its description.
Can I use Update V86 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 felixrieseberg/windows95 --skill update-v86 -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/update-v86, .gemini/skills/update-v86, .github/skills/update-v86 and .opencode/skills/update-v86 in your project.
What does Update V86 need to run?
Going by SKILL.md and its folder, Update V86 needs the command-line tools its instructions call (git, node, make, brew and curl).
Does Update V86 access the network?
SKILL.md names 2 domains. In commands or code: repo1.maven.org; the agent is likely to contact it when it follows the instructions. As links in the text: github.com. This is read from the text; nothing was executed.
Is Update V86 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 Update V86 use?
Update V86 has a licence file (the repository's licence) that doesn't match a standard licence. Read it on GitHub before reusing the skill.
How many tokens does Update V86 use?
About 1.7k tokens (SKILL.md is roughly 6.8k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.
What are the alternatives to Update V86?
Skills that share tags, products or a category with Update V86: Wasm Build (fair-acc/gnuradio4, 115 stars), Git Upstream Sync (wado-lang/wado, 117 stars), Fix Errors (warpdotdev/common-skills, 611 stars) and Flowfile Node Development (Edwardvaneechoud/Flowfile, 375 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Update V86?
felixrieseberg (a GitHub user) maintains it in felixrieseberg/windows95, which has 24,247 GitHub stars. The repository holds 3 skills in this directory. The repository was last updated on September 11, 2026.
Source: felixrieseberg/windows95 on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.