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-user-exception-triagegit 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-user-exception-triage)<a href="https://agentmods.dev/skills/microsoft/win-dev-skills/windbg-user-exception-triage"><img src="https://agentmods.dev/badge/skills/microsoft/win-dev-skills/windbg-user-exception-triage/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-user-exception-triage"><img src="https://agentmods.dev/badge/skills/microsoft/win-dev-skills/windbg-user-exception-triage.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 | $0.00069 | $0.01142 |
| Opus 5.5 | $0.00028 | $0.00457 |
| Sonnet 5.5 | $0.00014 | $0.00228 |
| Haiku 4.5 | $0.00007 | $0.00114 |
Grade A, and why
windbg-user-exception-triage 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 — 99 lines — stays where its author put it; the contents beside it link to each section on GitHub.
User-Mode Exception Triage
Load windbg-diagnostic-method first if it is not already loaded in this
conversation, and apply it throughout for evidence ranking, hypothesis testing,
confidence calibration, independent review, and report validation. This skill
adds the bug-family-specific commands and evidence requirements.
When to use
Start here for access violations, heap corruption, stack overflow, fail-fast, breakpoints, and other structured exceptions in a native application, service, or user-mode driver host process dump. This includes UMDF driver failures that occur in their user-mode host. Confirm the dump type from WinDbg; the filename extension alone does not distinguish user-mode from kernel-mode dumps.
Workflow
1. Establish the exception context
.exr -1
.ecxr
k
!analyze -v
Record the exception code, address, parameters, access type, registers, module,
and stack. .ecxr selects the saved exception context when available. If no
exception context was captured, report that limitation rather than treating the
currently selected thread as the faulting thread.
Use matching binaries and PDBs for your modules and public Windows symbols. Investigate mismatches or truncated stacks before naming a failing source line.
2. Classify and choose an available investigation
| Evidence | Next step |
|---|---|
0xC0000005 with allocation/free or overrun evidence |
windbg-user-heap-corruption-investigation |
0xC0000374 heap corruption |
windbg-user-heap-corruption-investigation |
0xC0000017, 0x8007000E, or an allocation-failure path |
windbg-user-virtual-memory-exhaustion |
| Lock/unlock failure following coroutine suspension | windbg-user-mutex-held-across-co-await |
| A TTD recording is available and earlier mutation is in question | windbg-user-ttd-reverse-debugging-triage |
| No crash exception and evidence of blocked work | windbg-user-wait-chain-analysis |
| A kernel dump reports a bugcheck | windbg-kernel-bugcheck-triage |
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 · 99 lines · 69 tokens per session scan A dcd794ddc427
windbg-user-exception-triage is a skill published in the GitHub repository microsoft/win-dev-skills (472 stars, last pushed 2d ago), licensed MIT. It adds 69 tokens to every session and 1,142 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 2026-10-08.
Other skills, from other repositories
component-flattening-analysis
Detects misplaced classes and fixes component hierarchy problems — finds code that should belong inside a component but sits at the root level. Use when asking "clean up component structure", "find orphaned classes", "fix module hierarchy", "flatten nested components", or analyzing why namespaces have misplaced code.…
codenavi
Your pathfinder for navigating unknown codebases. Investigates with precision, implements surgically, and never assumes — if it doesn't know, it says so. Maintains a .notebook/ knowledge base that grows across sessions, turning every discovery into lasting intelligence. Summons available skills, MCPs, and docs when…
chrome-devtools
Browser debugging, performance profiling, and automation via Chrome DevTools MCP. Use when user says "debug this page", "take a screenshot", "check network requests", "profile performance", "inspect console errors", or "analyze page load". Do NOT use for full E2E test suites (use playwright-skill) or non-browser…
sentry
Inspect Sentry issues, summarize production errors, and pull health data via the Sentry API (read-only). Use when user says "check Sentry", "what errors in production?", "summarize Sentry issues", "recent crashes", or "production error report". Requires SENTRYAUTHTOKEN. Do NOT use for setting up Sentry SDK…
chrome-devtools-mcp
Use Chrome DevTools MCP from .NET agents and .NET-focused repos to inspect, debug, and automate Chrome through an MCP client. USE FOR: the repo needs browser-level debugging for ASP.NET Core, Blazor, WebAssembly, or any .NET app with a web UI; the user wants an MCP server that can inspect console. DO NOT USE FOR: pure…
managedcode-orleans-graph
Integrate ManagedCode.Orleans.Graph into an Orleans-based .NET application for grain-call policy enforcement, deadlock detection, live-call telemetry, and Mermaid graph diagnostics. USE FOR: ManagedCode.Orleans.Graph integration; allowed grain transitions; Orleans call filters; live policy graphs; reviewing Orleans…