microsoft/win-dev-skills is a collection of AI-agent instructions and tools for creating native Windows applications with WinUI 3 and the Windows App SDK. Windows developers use it to guide agents through app development tasks from scaffolding and design to testing, packaging, and release. The catalogue entries are its agents, skills, and plugin components.
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.
npx skills add microsoft/win-dev-skills --skill windbg-diagnostic-methodgit clone --depth 1 https://github.com/microsoft/win-dev-skillsWrote 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/skills/microsoft/win-dev-skills/windbg-diagnostic-method)<a href="https://agentmods.dev/skills/microsoft/win-dev-skills/windbg-diagnostic-method"><img src="https://agentmods.dev/badge/skills/microsoft/win-dev-skills/windbg-diagnostic-method/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/skills/microsoft/win-dev-skills/windbg-diagnostic-method"><img src="https://agentmods.dev/badge/skills/microsoft/win-dev-skills/windbg-diagnostic-method.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 | $0.00042 | $0.01730 |
| Opus 5.5 | $0.00017 | $0.00692 |
| Sonnet 5.5 | $0.00008 | $0.00346 |
| Haiku 4.5 | $0.00004 | $0.00173 |
Grade A, and why
windbg-diagnostic-method 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 8d 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 — 180 lines — stays where its author put it; the contents beside it link to each section on GitHub.
WinDbg Diagnostic Method
Apply this method alongside the bug-family-specific skill selected for an investigation. Pattern matches route the investigation; they do not prove the root cause.
Evidence ladder
Prefer direct evidence in this order:
- Faulting instruction/context, bugcheck or exception parameters, and resource owners/waiters from the actual dump or trace.
- Matching symbols and the user's authorized source for the involved build.
- Allocation/free, Verifier, IRP, lock, ETW, WCT, or TTD history captured for the same failure.
- Controlled reproduction and instrumentation.
- Pattern guidance as a hypothesis only.
Never claim commands, source access, or artifacts that are unavailable in the session.
First-pass normalization
- Confirm process dump versus kernel dump and target architecture/build.
- Load public Windows symbols and matching symbols for user/vendor modules.
- Record missing pages, symbols, related-process dumps, trace scope, and tool availability.
- User-mode exception:
.exr -1,.ecxr, stack, and registers. - Kernel bugcheck:
.bugcheck,!analyze -v, then documented context/trap recovery for that code. - Hang: identify the affected operation, wait type, owner/server, and deepest supported blocker.
- Memory: distinguish corruption, address-space pressure, and commit/limit failures before choosing a fix.
Five-phase investigation
- OBSERVE: establish dump/trace type, architecture, symbols, code, stack, registers, thread/resource state, and missing evidence.
- HYPOTHESIZE: form a specific primary mechanism and at least two plausible alternatives when the evidence permits.
- TEST: identify direct debugger, source, trace, or reproduction evidence that distinguishes the hypotheses. Absence of evidence is not evidence of absence.
- EVALUATE: record supporting, contradictory, and missing evidence.
- CONCLUDE or PIVOT: name the violated invariant and verification plan, or
remain
candidate-pending-verification.
What ships with it
1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 8d ago First seen · 180 lines · 42 tokens per session scan A d5d248c3f877
windbg-diagnostic-method is a skill published in the GitHub repository microsoft/win-dev-skills (472 stars, last pushed 2d ago), licensed MIT. It adds 42 tokens to every session and 1,730 once invoked, about $0.0002 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 2026-10-08.
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