Update V86
felixrieseberg/windows95
Build and install v86 (wasm + libv86.js + BIOS) into windows95.
Configure and run the local Emscripten/WebAssembly build with ONNX Runtime, including the tests.
Install Wasm Build
$ npx skills add fair-acc/gnuradio4 --skill wasm-build -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install fair-acc/gnuradio4 wasm-build --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/fair-acc/gnuradio4.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.claude/skills/wasm-build .claude/skills/wasm-build && 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 "wasm-build" agent skill from https://github.com/fair-acc/gnuradio4/tree/main/.claude/skills/wasm-build into .claude/skills/wasm-build/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "wasm-build", 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/fair-acc/gnuradio4/tree/main/.claude/skills/wasm-buildType 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 fair-acc/gnuradio4 --skill wasm-build -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install fair-acc/gnuradio4 wasm-build --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/fair-acc/gnuradio4.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.claude/skills/wasm-build .agents/skills/wasm-build && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "wasm-build" agent skill from https://github.com/fair-acc/gnuradio4/tree/main/.claude/skills/wasm-build into .agents/skills/wasm-build/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "wasm-build", 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 fair-acc/gnuradio4 --skill wasm-build -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install fair-acc/gnuradio4 wasm-build --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/fair-acc/gnuradio4.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.claude/skills/wasm-build .cursor/skills/wasm-build && 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 "wasm-build" agent skill from https://github.com/fair-acc/gnuradio4/tree/main/.claude/skills/wasm-build into .cursor/skills/wasm-build/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "wasm-build", 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/fair-acc/gnuradio4.git --path .claude/skills/wasm-build--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 fair-acc/gnuradio4 --skill wasm-build -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install fair-acc/gnuradio4 wasm-build --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/fair-acc/gnuradio4.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.claude/skills/wasm-build .gemini/skills/wasm-build && 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 "wasm-build" agent skill from https://github.com/fair-acc/gnuradio4/tree/main/.claude/skills/wasm-build into .gemini/skills/wasm-build/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "wasm-build", 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 fair-acc/gnuradio4 wasm-buildInstalls 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 fair-acc/gnuradio4 --skill wasm-build -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/fair-acc/gnuradio4.git skills-src && mkdir -p .github/skills && cp -r skills-src/.claude/skills/wasm-build .github/skills/wasm-build && 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 "wasm-build" agent skill from https://github.com/fair-acc/gnuradio4/tree/main/.claude/skills/wasm-build into .github/skills/wasm-build/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "wasm-build", 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 fair-acc/gnuradio4 --skill wasm-build -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install fair-acc/gnuradio4 wasm-build --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/fair-acc/gnuradio4.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.claude/skills/wasm-build .opencode/skills/wasm-build && 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 "wasm-build" agent skill from https://github.com/fair-acc/gnuradio4/tree/main/.claude/skills/wasm-build into .opencode/skills/wasm-build/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "wasm-build", 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
wasm-build- GitHub stars
- 115
- Token cost
- ~394 tokens
- SKILL.md length
- 127 words
- Files
- 1
- Skills in repo
- 4
- Repo updated
- First seen
- Licence
- LGPL-3.0
At a glance
Configure and run the local Emscripten/WebAssembly build with ONNX Runtime, including the tests.
- Reproducing an emcc CI failure
- SKILL.md covers The archive must not be LTO and Fixtures
- Calls cmake
- Changing anything under blocks/onnx that WASM consumes
What it does
Wasm Build is an agent skill from fair-acc/gnuradio4. Configure and run the local Emscripten/WebAssembly build with ONNX Runtime, including the tests. Use when reproducing an emcc CI failure or changing anything under blocks/onnx that WASM consumes.
Its SKILL.md is about 390 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 and ONNX. The repository describes itself as: Prototype implementations for a more compile-time efficient flowgraph API. The licence is LGPL-3.0.
When your agent uses it
- Reproducing an emcc CI failure
- Changing anything under blocks/onnx that WASM consumes
Example prompts
- “/wasm-build”
Requirements
- Docker
What it can do on your machine
Read from SKILL.md and the folder at commit af62235. 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:
cmake
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.
Context cost
Wasm Build loads about 394 tokens when it runs. Until then it costs about 52 tokens; SKILL.md has 127 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 fair-acc/gnuradio4 at commit af62235, republished under its LGPL-3.0 licence (© fair-acc). 127 words, ~394 tokens.
Download SKILL.mdSave it as
.claude/skills/wasm-build/SKILL.md (or your agent's skills folder).- name
- wasm-build
- description
- Configure and run the local Emscripten/WebAssembly build with ONNX Runtime, including the tests. Use when reproducing an emcc CI failure or changing anything under blocks/onnx that WASM consumes.
WASM build
source /home/steinhagen/git/emsdk/emsdk_env.sh
emcmake cmake -S . -B build-wasm -G Ninja \
-DCMAKE_BUILD_TYPE=Release -DENABLE_TESTING=ON \
-DORT_STATIC_LIB_DIR=/home/steinhagen/temp/ort-nolto-eh
cmake --build build-wasm --parallel 2 --target <targets>
ctest --test-dir build-wasm -R "qa_Onnx" --output-on-failureThe archive must not be LTO
~/onnxruntime-static holds LLVM IR bitcode — it predates the -flto strip in
docker/build_onnxruntime.sh. Linking it makes wasm-ld die with SIGSEGV and no diagnostic. Use an
ort-nolto* tree. To check an archive:
ar x <archive>.a && file $(ls *.o | head -1)
# want: "WebAssembly (wasm) binary" not: "LLVM IR bitcode"Fixtures
WASM has no host filesystem. Every model a test loads must be embedded via --embed-file in
blocks/onnx/test/CMakeLists.txt, and the lists must mirror the modelPath() and
deliverableModelPath() calls in each source — including any loop over a runtime variable, which a
grep for string literals will miss.
A minimal ONNX Runtime build loads .ort only. .onnx fixtures fail with "ONNX format model is not
supported in this build"; use deliverableModelPath(), which selects .ort.gz under Emscripten.
Redirect test output through head -c — a looping WASM binary has filled the disk before.
© fair-acc, LGPL-3.0. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
Just SKILL.md in .claude/skills/wasm-build of fair-acc/gnuradio4.
Open the folder on GitHubat commit af62235
Compare with similar skills
Wasm Build 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 |
|---|---|---|---|---|---|---|
| Wasm Build this skillfair-acc/gnuradio4 | 115 | — | ~394 | Automated safety check: Pass | LGPL-3.0 | |
| Update V86felixrieseberg/windows95 | 24k | — | ~1.7k | Automated safety check: Pass | Custom licence | |
| ONNX Runtime Test Runnermicrosoft/onnxruntime | 22k | — | ~1.8k | Automated safety check: Pass | MIT | |
| ONNX Runtime GPU Transformers Testsmicrosoft/onnxruntime | 22k | — | ~2.9k | Automated safety check: Pass | MIT | |
| Git Upstream Syncwado-lang/wado | 117 | — | ~855 | Automated safety check: Pass | MIT | |
| ONNX Runtime CI Managementmicrosoft/onnxruntime | 22k | — | ~4.1k | Automated safety check: Pass | MIT |
Similar skills
- Official
ONNX Runtime Test Runner
microsoft/onnxruntime
Runs and debugs ONNX Runtime tests: Google Test executables for C++ and unittest or pytest for Python, with filters and build-directory guidance.
- Official
ONNX Runtime GPU Transformers Tests
microsoft/onnxruntime
Runs the ONNX Runtime transformers Python tests against a GPU wheel and proves the cuDNN flash attention path was used rather than a silent fallback.
Git Upstream Sync
wado-lang/wado
The only way to merge origin/main into a branch, conflicts or not.
- Official
ONNX Runtime CI Management
microsoft/onnxruntime
Triggers, re-runs and unblocks the CI checks on an ONNX Runtime pull request, after diagnosing whether a failure is transient or needs a code change.
Edit Timeline Studio
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Analyze images, video, speech, motion, products, and websites; route local vision, audio, depth, tracking, matting, identity, and restoration models; auto-edit, replicate, enhance, caption, voice…
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Fetch and classify a failed GitHub Actions job for this repo — distinguish out-of-memory kills, six-hour timeouts, configure errors and genuine test failures, and identify what was in flight.
Measure Build Cost
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Measure the peak memory and wall time of a single translation unit or link step, so build parallelism can be sized from evidence.
Restyle
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Check or apply the exact formatter set the Restyled CI bot runs (clang-format v18, cmake-format, prettier for markdown and yaml, shellcheck, whitespace, black).
Related
Works with
Categories
Questions about Wasm Build
What does Wasm Build do?
Configure and run the local Emscripten/WebAssembly build with ONNX Runtime, including the tests. Wasm Build is an agent skill from fair-acc/gnuradio4. Configure and run the local Emscripten/WebAssembly build with ONNX Runtime, including the tests.
When should I use Wasm Build?
Wasm Build fits situations like: reproducing an emcc CI failure; changing anything under blocks/onnx that WASM consumes.
How do I install Wasm Build in Claude Code?
Run `npx skills add fair-acc/gnuradio4 --skill wasm-build -a claude-code`. Or copy the skill folder (.claude/skills/wasm-build in fair-acc/gnuradio4) into .claude/skills/wasm-build in your project. Claude Code loads it when a task matches its description.
How do I install Wasm Build in Codex?
Run `npx skills add fair-acc/gnuradio4 --skill wasm-build -a codex`. Or copy the skill folder (.claude/skills/wasm-build in fair-acc/gnuradio4) into .agents/skills/wasm-build in your project. Codex loads it when a task matches its description.
Can I use Wasm Build 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 fair-acc/gnuradio4 --skill wasm-build -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/wasm-build, .gemini/skills/wasm-build, .github/skills/wasm-build and .opencode/skills/wasm-build in your project.
What does Wasm Build need to run?
Going by SKILL.md and its folder, Wasm Build needs the command-line tools its instructions call (cmake). Our summary lists: Docker.
Does Wasm Build 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 Wasm Build 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 Wasm Build use?
Wasm Build is published under the LGPL-3.0 licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Wasm Build use?
About 394 tokens (SKILL.md is roughly 1.6k 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 Wasm Build?
Skills that share tags, products or a category with Wasm Build: Update V86 (felixrieseberg/windows95, 24k stars), ONNX Runtime Test Runner (microsoft/onnxruntime, 22k stars), ONNX Runtime GPU Transformers Tests (microsoft/onnxruntime, 22k stars) and Git Upstream Sync (wado-lang/wado, 117 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Wasm Build?
fair-acc (a GitHub organization) maintains it in fair-acc/gnuradio4, which has 115 GitHub stars. The repository holds 4 skills in this directory. The repository was last updated on October 10, 2026.
Source: fair-acc/gnuradio4 on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.