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docs/_includes/CONSTANTS.md

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+### `docs/_includes/CONSTANTS.md`
+
+```yaml
+---
+# ─────────────────────────────────────────────────────────────────────────────
+#  Shared constants for both the technical docs (Markdown) and the marketing
+#  site (Nunjucks).  Eleventy injects these variables into every template.
+#  Never hard‑code the values elsewhere — lint‑ci will block the merge.
+# ─────────────────────────────────────────────────────────────────────────────
+
+dotnet:       "10 LTS"      # Runs on .NET 10 (LTS channel)
+angular:      "20"          # Front‑end framework major
+quota_anon:   33            # Anonymous daily scans
+quota_token:  333           # Daily scans with free JWT
+slowdown:     "5–60 s"      # Delay window after exceeding quota
+
+# Add new keys here; update the docs linter pattern in .gitlab-ci.yml.
+---