ci: dogfood structlint and dupehound gates

.gauntlet.yml

@@ -0,0 +1,12 @@
+custom_gates:
+  # Repository structure is a whole-run invariant and is never diff-suppressed.
+  structlint:
+    command: ["structlint", "validate", "--format", "github"]
+    parser: github-annotations
+    line_scoped: false
+
+  # Duplication findings carry source locations and are scoped to changed lines.
+  dupehound:
+    command: ["dupehound", "scan", "--format", "github", "--quiet"]
+    parser: github-annotations
+    line_scoped: true

.github/workflows/pr.yml

@@ -40,16 +40,6 @@ jobs:
           INCREMENTAL: false
           REVIEW_RULES: concise
 
-  validate:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v4
-      - uses: AxeForging/structlint@main
-        with:
-          config: .structlint.yaml
-          comment-on-pr: "true"
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-
   gauntlet:
     runs-on: ubuntu-latest
     permissions:
@@ -63,6 +53,10 @@ jobs:
       - uses: actions/setup-go@v5
         with:
           go-version: "1.25"
+      - name: Install custom quality gates
+        run: |
+          go install github.com/AxeForging/structlint@v0.6.0
+          go install github.com/AxeForging/dupehound@v0.1.0
       # Dogfood: gauntlet runs gauntlet against its own PR diff.
       - uses: ./
         with:

README.md

@@ -146,6 +146,16 @@ make test-integration   # bin-driven scenarios in temp repos
 make build              # bin/gauntlet with real ldflag build info
 ```
 
+Gauntlet dogfoods its own orchestration through `.gauntlet.yml`: Structlint runs as
+a whole-repository structural invariant, while Dupehound annotations are scoped to the
+PR diff. Install both released gates before reproducing CI locally:
+
+```bash
+go install github.com/AxeForging/structlint@v0.6.0
+go install github.com/AxeForging/dupehound@v0.1.0
+gauntlet check --staged --format agent
+```
+
 Spec: [docs/specs/001-gauntlet-core.md](docs/specs/001-gauntlet-core.md). Plan: [docs/specs/001-gauntlet-core.plan.md](docs/specs/001-gauntlet-core.plan.md). Roadmap: [ROADMAP.md](ROADMAP.md).
 
 ## License