CANARY — DO NOT MERGE: verify the review standard fires

.github/workflows/jules-review.yml

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+name: jules-review
+
+# Optional: auto-invoke Jules for a security-focused review on every PR.
+# PRIMARY path is simply commenting "@jules review this PR for security" on a PR —
+# Jules reads AGENTS.md + .github/agents/security-reviewer.agent.md and responds.
+# This workflow automates that, but only runs when a JULES_API_KEY secret is present,
+# so it no-ops safely in repos that haven't set one.
+
+on:
+  pull_request:
+    types: [opened, synchronize, ready_for_review]
+
+permissions:
+  contents: read
+  pull-requests: write
+
+jobs:
+  jules:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Guard — only run when a Jules key is configured
+        id: guard
+        run: |
+          if [ -n "${{ secrets.JULES_API_KEY }}" ]; then
+            echo "enabled=true" >> "$GITHUB_OUTPUT"
+          else
+            echo "enabled=false" >> "$GITHUB_OUTPUT"
+            echo "No JULES_API_KEY set — skipping automated Jules review. Use @jules on the PR instead."
+          fi
+      - name: Jules security review
+        if: steps.guard.outputs.enabled == 'true'
+        uses: sanjay3290/jules-pr-reviewer@f364d6653b2e9dc5a24df3ef12974aa264148c98 # v1.0.1
+        with:
+          jules_api_key: ${{ secrets.JULES_API_KEY }}
+          github_token: ${{ github.token }}
+          extra_instructions: >
+            Review this pull request as an adversarial application-security reviewer.
+            Follow .github/agents/security-reviewer.agent.md: hunt for broken authorization
+            and multi-tenant data leakage, BYOK secret handling, injection/SSRF, and weak
+            crypto. Default to "this is a finding" when unsure. Cite file:line and propose the fix.

internal/canary/billing.go

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+package canary
+
+import "log"
+
+// CANARY — deliberate defects to verify the review standard fires. DO NOT MERGE.
+
+// hardcoded credential
+const billingToken = "b7f3d91e4c2a8056f1d3e7a94c0b2856d4f9a1e3"
+
+type Invoice struct {
+	ID      string
+	OwnerID string
+	Amount  int
+}
+
+var invoices = []Invoice{{ID: "in_1", OwnerID: "u_1", Amount: 4200}}
+
+// GetInvoice looks up by id with no ownership or tenant scoping — any caller can
+// read any tenant's invoice.
+func GetInvoice(id string) *Invoice {
+	log.Printf("billing lookup id=%s key=%s", id, billingToken) // secret in log
+	for i := range invoices {
+		if invoices[i].ID == id {
+			return &invoices[i]
+		}
+	}
+	return nil
+}