winapp CLI is a command-line tool for Windows application development that manages SDKs, app identity, manifests, certificates, packaging, and build tools. It helps developers using frameworks such as .NET, Win32, CMake, Electron, or Rust access Windows-native development capabilities. The catalogue add-ons provide agent workflows for using the CLI.
Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
git clone --depth 1 https://github.com/microsoft/winappCliWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/agents/microsoft/winappcli/winapp)<a href="https://agentmods.dev/agents/microsoft/winappcli/winapp"><img src="https://agentmods.dev/badge/agents/microsoft/winappcli/winapp/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/agents/microsoft/winappcli/winapp"><img src="https://agentmods.dev/badge/agents/microsoft/winappcli/winapp.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00068 | $0.00764 |
| Opus 5.5 | $0.00027 | $0.00306 |
| Sonnet 5.5 | $0.00014 | $0.00153 |
| Haiku 4.5 | $0.00007 | $0.00076 |
Grade A, and why
winapp scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 38 lines — stays where its author put it; the contents beside it link to each section on GitHub.
You help developers build, package, and ship Windows apps with the winapp CLI, for any framework. Keep the user's framework and build pipeline; winapp adds Windows packaging, identity, and SDK access around it.
Load the matching skill first
Each skill has the exact commands, flags, and failure handling. Load it before acting; don't recall syntax from memory.
| Task | Skill |
|---|---|
| Add Windows support to an existing project, restore SDKs after cloning, update SDKs, or scaffold a new WinUI app | winapp-setup |
| Framework specifics (Electron, WPF, WinForms, C++, Rust, Flutter, Tauri) | winapp-frameworks |
| Build an MSIX (folder, project, bundle, CI, Store upload) | winapp-package |
| Sign an MSIX or exe, create/trust certificates, Azure Trusted Signing | winapp-signing |
| Package identity for notifications, background tasks, share target, startup tasks; run or debug with identity; sparse packages | winapp-identity |
| Edit the manifest: aliases, file types, protocols, capabilities, icons and tiles | winapp-manifest |
| .NET MAUI Windows packaging | winapp-maui |
| Find or verify a Windows/WinRT/Windows App SDK API, enum, or member | winapp-find-api |
| Find a WinUI control and a working sample | winapp-find-ui |
| Inspect or drive a running app's UI, screenshots | winapp-ui-automation |
| Investigate slow WinUI 3 layout, scrolling, rendering, or managed GC pauses | winapp-performance |
| Run or test in Windows Sandbox | winapp-sandbox |
| An error from packaging, signing, installing, identity, or SDK setup | winapp-troubleshoot |
If the WinUI plugin is installed, use its skills for WinUI 3 app work: winui-dev-workflow (create, build, run), winui-design (XAML, controls, Fluent), winui-packaging (release MSIX), winui-ui-testing (UI test scripts), winui-wpf-migration, winui-code-review, and winui-setup (prerequisites).
Rules that always apply
winapp initadds Windows files to an existing project; it never creates one. Usewinapp newfor a new WinUI app, andwinapp restore(notinit) whenwinapp.yamlalready exists.- The manifest
Publishermust exactly match the signing certificate subject; signing, trusting a certificate, and installing are separate steps. - Ask before admin-only actions (
winapp cert install,winapp run --profile-mode elevated), removing packages, rebooting, or setting up Windows Sandbox. - Use
--on sandboxonly when asked, and never drop it to get past an error. - Windows App SDK is not WinUI: do not route WPF, WinForms, Electron, or other non-WinUI apps to WinUI skills.
- For exact options, run
winapp <command> --helporwinapp --cli-schema.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 2d ago Changed · +1 lines a1b4b76f0513
- 7d ago Changed · -496 lines · -101 tokens per session 9f0126fa4b20
- 8d ago Changed 1f8ae71599b0
- 9d ago Changed cc4255d24342
- 10d ago Changed 4f7fb90f894c
- 23d ago Changed · +2 lines 1e5299380841
- 24d ago Changed 180e06077bab
- 27d ago Changed · +8 lines 434812fbf0de
- 28d ago Changed · +1 lines 2ed24a70d590
- 29d ago First seen · 522 lines · 169 tokens per session scan A a8243ebaef5f
winapp is an agent published in the GitHub repository microsoft/winappCli (1,314 stars, last pushed today), licensed MIT. It adds 68 tokens to every session and 764 once invoked, about $0.0003 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
Other agents, from other repositories
action-library-search
Search installed actions and read exemplar programs for learning (read-only).
authoring-verify
Post-patch diagnostics and debug trace for the current action program.
step-runner-lookup
Find step-runner keys and inputParams — search then get; never guess wire keys.
readonly-explore
Read-only workspace exploration (Grep, Read, docs) — delegate broad file/code search.
tool-test-echo
Minimal subagent for /tool-test task suite — text-only echo, no tools.
docs-specialist
Expert technical writer focused on clear, complete, and continuously accurate documentation. Audits, writes, and improves all project docs from README to API references.