Add WinDbg diagnosis plugin

.agents/plugins/marketplace.json

@@ -1,9 +1,21 @@
 {
   "name": "win-dev-skills",
   "interface": {
-    "displayName": "Windows app development"
+    "displayName": "Windows development and debugging"
   },
   "plugins": [
+    {
+      "name": "windbg",
+      "source": {
+        "source": "local",
+        "path": "./plugins/windbg"
+      },
+      "policy": {
+        "installation": "AVAILABLE",
+        "authentication": "ON_INSTALL"
+      },
+      "category": "Developer Tools"
+    },
     {
       "name": "winui",
       "source": {

.claude-plugin/marketplace.json

@@ -4,9 +4,21 @@
     "name": "Microsoft",
     "url": "https://github.com/microsoft/win-dev-skills"
   },
-  "description": "Agents and skills for Windows app development.",
+  "description": "Agents and skills for Windows development and debugging.",
   "version": "0.7.1",
   "plugins": [
+    {
+      "name": "windbg",
+      "description": "WinDbg diagnosis workflows and report validation for applications, services, UMDF/user-mode drivers, and kernel-mode drivers.",
+      "version": "1.0.0",
+      "source": "./plugins/windbg",
+      "author": {
+        "name": "Microsoft",
+        "url": "https://github.com/microsoft/WinDbg-Feedback"
+      },
+      "homepage": "https://github.com/microsoft/WinDbg-Feedback",
+      "repository": "https://github.com/microsoft/win-dev-skills"
+    },
     {
       "name": "winui",
       "description": "Agents and skills for WinUI 3 app development. Create new WinUI 3 desktop apps, convert from other frameworks to WinUI 3, or add features to existing WinUI 3 applications.",

.github/CODEOWNERS

@@ -17,3 +17,4 @@
 #
 # winui and winappcli are maintained in microsoft/winappCli and reviewed
 # there; their catalog entries are covered above.
+/plugins/windbg/ @nmetulev @azchohfi @niels9001 @rtrimceski-MS

.github/plugin/marketplace.json

@@ -5,10 +5,16 @@
     "url": "https://github.com/microsoft/win-dev-skills"
   },
   "metadata": {
-    "description": "Agents and skills for Windows app development.",
+    "description": "Agents and skills for Windows development and debugging.",
     "version": "0.7.1"
   },
   "plugins": [
+    {
+      "name": "windbg",
+      "description": "WinDbg diagnosis workflows and report validation for applications, services, UMDF/user-mode drivers, and kernel-mode drivers.",
+      "version": "1.0.0",
+      "source": "./plugins/windbg"
+    },
     {
       "name": "winui",
       "description": "Agents and skills for WinUI 3 app development. Create new WinUI 3 desktop apps, convert from other frameworks to WinUI 3, or add features to existing WinUI 3 applications.",

.github/workflows/pr-validation.yml

@@ -45,10 +45,17 @@ jobs:
       # Same linter and version github/awesome-copilot runs on external plugins.
       # Only plugins stored in this repo are linted; remote plugins are linted
       # in their own repositories.
+      - name: Install local plugin lint dependencies
+        run: npm ci --prefix scripts/vally --no-audit --no-fund
+
+      - name: Check WinDbg package
+        run: node scripts/validate-windbg.mjs
+
+      - name: Test WinDbg diagnosis validator
+        run: node scripts/tests/test-windbg-validator.mjs
+
       - name: Lint local plugin skills
-        run: |
-          npm ci --prefix scripts/vally --no-audit --no-fund
-          node scripts/vally/lint-skills.mjs
+        run: node scripts/vally/lint-skills.mjs
 
       # Fixture-based self-test: a plugin stored in this repo is checked and linted.
       - name: Test catalog tooling

CHANGELOG.md

@@ -14,6 +14,9 @@ to `## [X.Y.Z] — YYYY-MM-DD` (see RELEASING.md).
 
 ### Added
 
+- **`windbg` plugin**: focused WinDbg diagnosis workflows,
+  deterministic output validation, contrarian review, and public
+  WinDbg-Feedback guidance.
 - **`winappcli` plugin** (WinApp CLI 0.7.1: MSIX packaging, signing, package
   identity, appxmanifest, Windows SDK setup, Store distribution) for Copilot,
   Claude Code, and Codex, pinned to microsoft/winappCli `v0.7.1`. Install with
@@ -32,9 +35,9 @@ to `## [X.Y.Z] — YYYY-MM-DD` (see RELEASING.md).
   [microsoft/winappCli](https://github.com/microsoft/winappCli)**, pinned to
   commit `5a064a42`. Its content is unchanged (still 0.7.1: same name, agent,
   and eight skills). File WinUI issues and PRs in microsoft/winappCli.
-- This repo now hosts and lists agent plugins for Windows app development
-  ("Agents and skills for Windows app development"). Copilot and Claude Code
-  install commands are unchanged.
+- This repo now hosts and lists agent plugins for Windows development and
+  debugging ("Agents and skills for Windows development and debugging").
+  Copilot and Claude Code install commands are unchanged.
 - **The Codex catalog is renamed from `microsoft-winui` to `win-dev-skills`**,
   so Codex commands now match the other hosts (`<plugin>@win-dev-skills`).
 

README.md

@@ -1,11 +1,12 @@
-# Agents and skills for Windows development
+# Agents and skills for Windows development and debugging
 
 Agent plugins for Windows development and debugging—from apps and services to kernel-mode drivers—with GitHub Copilot, Claude Code, OpenAI Codex, and more. Add this repo as a marketplace once, then install the plugins you need.
 
 | Plugin | What it's for | Maintained in | Hosts |
 |---|---|---|---|
 | **`winappcli`** | Packaging, signing, and distributing Windows apps with [WinApp CLI](https://github.com/microsoft/winappCli): MSIX, certificates, package identity, appxmanifest, Windows SDK setup, and the Microsoft Store. Works with Electron, .NET, C++, Rust, Flutter, and Tauri. | [microsoft/winappCli](https://github.com/microsoft/winappCli/tree/main/plugins/winapp) | Copilot, Claude Code, Codex, OpenClaw, OpenCode |
 | **`winui`** | Native Windows apps with **WinUI 3** and the **Windows App SDK**: scaffold, design, build, run, test, package, and ship. | [microsoft/winappCli](https://github.com/microsoft/winappCli/tree/main/plugins/winui) | Copilot, Claude Code, Codex, OpenClaw, OpenCode |
+| **`windbg`** | WinDbg diagnosis workflows and report validation for applications, services, UMDF/user-mode drivers, and kernel-mode drivers. [Feedback](https://github.com/microsoft/WinDbg-Feedback/issues). | [This repo](plugins/windbg/README.md) | Copilot, Claude Code, Codex, OpenCode |
 
 On Codex, OpenClaw, and OpenCode, skills load; agents aren't available.
 

plugins/windbg/.claude-plugin/plugin.json

@@ -0,0 +1,21 @@
+{
+  "name": "windbg",
+  "version": "1.0.0",
+  "description": "WinDbg diagnosis workflows and report validation for applications, services, UMDF/user-mode drivers, and kernel-mode drivers.",
+  "author": {
+    "name": "Microsoft",
+    "url": "https://github.com/microsoft/WinDbg-Feedback"
+  },
+  "homepage": "https://github.com/microsoft/WinDbg-Feedback",
+  "repository": "https://github.com/microsoft/win-dev-skills",
+  "keywords": [
+    "windows",
+    "windbg",
+    "debugging",
+    "crash",
+    "hang",
+    "memory",
+    "umdf",
+    "drivers"
+  ]
+}

plugins/windbg/CHANGELOG.md

@@ -0,0 +1,12 @@
+# Changelog
+
+## 1.0.0 - Initial contribution
+
+- Included the curated debugging skill inventory in `skills.json`.
+- Added the shared `windbg-diagnostic-method` skill with deterministic report
+  validation and the contrarian agent required for the complete workflow.
+- Kept the runtime package limited to the inventory in `skills.json`.
+- Removed owner and metadata fields from every skill header.
+- Added public WinDbg-Feedback guidance.
+- Added explicit diagnosis/fix confidence separation and fix-path coverage
+  calibration for the contrarian review gate.

plugins/windbg/FEEDBACK.md

@@ -0,0 +1,66 @@
+# Public feedback
+
+Feedback destination:
+[microsoft/WinDbg-Feedback issues](https://github.com/microsoft/WinDbg-Feedback/issues).
+
+Use this procedure for feedback about these debugging skills or WinDbg. For
+general application-debugging help, consult that repository's
+[support guidance](https://github.com/microsoft/WinDbg-Feedback/blob/master/SUPPORT.md).
+
+## Procedure for assistants
+
+1. Collect the skill ID, public package version, the user's own verdict, and
+   what was confusing, incorrect, or missing. Do not invent the user's verdict
+   or claim a diagnosis is confirmed when it is not.
+2. Check for an existing relevant issue before drafting a new one, when search
+   is available. Do not add labels or choose assignees without authorization.
+3. Prepare a minimal sanitized title and body using the template below. Exclude
+   secrets, customer data, usernames, private paths, hostnames, proprietary source,
+   internal links, memory contents, and complete diagnostic transcripts.
+4. Show the exact draft and state that it will be publicly visible in
+   `microsoft/WinDbg-Feedback`. Obtain explicit approval before posting. Re-review
+   material changes to the approved draft. Declining or cancelling creates no
+   issue.
+5. Use the host's supported GitHub issue-creation tool when available and
+   authorized. Otherwise provide the approved text and
+   [new-issue page](https://github.com/microsoft/WinDbg-Feedback/issues/new)
+   for manual submission. Tool/authentication failure is an explicit failure,
+   not a successful submission or an excuse to silently use another destination.
+6. Return a confirmed issue URL only after creation succeeds. Never fabricate a
+   receipt. For manual submission, say that the issue has not been submitted yet.
+
+Do not automatically attach or upload dumps, CABs, ETLs, TTD recordings, source
+code, or diagnosis files. Permission to share an artifact privately does not
+authorize public disclosure. Do not put unreviewed diagnostic text into
+issue-URL query parameters. Report sensitive vulnerabilities through the approved
+private security reporting channel, not this public feedback flow.
+
+## Suggested issue template
+
+Title: `[Debugging skills][<skill-id>] <short feedback summary>`
+
+```markdown
+### Skill and version
+Plugin: windbg
+Package version: <public version from plugin.json>
+Skill: <skill-id>
+
+### Category and verdict
+Category: <incorrect guidance / missing coverage / unclear instructions / packaging / positive feedback>
+My verdict: <helpful / partly helpful / incorrect / unclear>
+
+### Expected behavior
+<What the guidance should help me do>
+
+### Observed behavior
+<Relevant step and minimal sanitized evidence; label uncertain conclusions>
+
+### Environment
+<Relevant WinDbg version, Windows version, architecture; omit identifying information>
+
+### Suggested improvement
+<Optional correction, missing explanation, or synthetic repro>
+```
+
+Only include information the user approves for public disclosure. There is no
+bundled uploader, credential store, private share, or notification service.