diff --git a/www/README.md b/www/README.md
index dd00160..29d9456 100644
--- a/www/README.md
+++ b/www/README.md
@@ -200,6 +200,35 @@ Available sizes are `default` and `small`. A `_blank` target automatically adds
 
 Normal Markdown links remain preferred for ordinary page and article content.
 
+### Stable Heading Links
+
+Astro automatically generates an ID for each Markdown heading. When a section
+needs a stable, editorially controlled fragment link, add an explicit ID with
+Sätteri heading-attribute syntax:
+
+```md
+## Accepted Insurance Carriers {#accepted-insurance-heading}
+```
+
+Link to it with the resulting fragment URL:
+
+```md
+[View accepted carriers](/insurance#accepted-insurance-heading)
+```
+
+Keep explicit IDs unique within the page, lowercase, and hyphenated. Treat a
+published ID as permanent so inbound links do not break when heading text is
+edited. This syntax is supported in both Markdown and MDX files.
+
+### Markdown Directives
+
+Sätteri directive parsing is enabled for container (`:::name`), leaf
+(`::name`), and text (`:name`) directives. Parsing creates directive nodes;
+rendering a named directive requires a corresponding Markdown transformation
+plugin. Until a directive and its semantic HTML treatment are registered, do
+not use it in published content because the default renderer omits unhandled
+directive nodes.
+
 ### Front Matter CMS
 
 The project includes `frontmatter.json` for the Front Matter CMS VS Code
diff --git a/www/astro.config.mjs b/www/astro.config.mjs
index 9a8a437..31fdb7e 100644
--- a/www/astro.config.mjs
+++ b/www/astro.config.mjs
@@ -1,5 +1,6 @@
 import { defineConfig } from 'astro/config';
 import mdx from '@astrojs/mdx';
+import { satteri } from '@astrojs/markdown-satteri';
 
 export default defineConfig({
   site: 'https://www.azinstitute4autism.com',
@@ -7,6 +8,12 @@ export default defineConfig({
   compressHTML: true,
   integrations: [mdx()],
   markdown: {
+    processor: satteri({
+      features: {
+        headingAttributes: true,
+        directive: true
+      }
+    }),
     shikiConfig: { theme: 'github-light' }
   }
 });
diff --git a/www/package-lock.json b/www/package-lock.json
index d2869e0..161648e 100644
--- a/www/package-lock.json
+++ b/www/package-lock.json
@@ -6,6 +6,7 @@
     "": {
       "name": "arizona-institute-for-autism",
       "dependencies": {
+        "@astrojs/markdown-satteri": "^0.3.5",
         "@astrojs/mdx": "^7.0.5",
         "astro": "^7.1.5",
         "cheerio": "^1.1.0",
diff --git a/www/package.json b/www/package.json
index e695160..ab1ca9a 100644
--- a/www/package.json
+++ b/www/package.json
@@ -20,6 +20,7 @@
     "generate:redirects": "node tools/generate-redirects.mjs"
   },
   "dependencies": {
+    "@astrojs/markdown-satteri": "^0.3.5",
     "@astrojs/mdx": "^7.0.5",
     "astro": "^7.1.5",
     "cheerio": "^1.1.0",
diff --git a/www/reports/migration-summary.md b/www/reports/migration-summary.md
index 2bb55ba..f663543 100644
--- a/www/reports/migration-summary.md
+++ b/www/reports/migration-summary.md
@@ -73,6 +73,10 @@ Implemented fidelity work includes:
   than preserving the live pages' differing row spacing.
 - The Community 4 Autism logo on `/donate-autism-giveback` is horizontally
   centered on mobile instead of retaining the live page's left alignment.
+- The empty `<h6>` retained by the live `/schedule-consultation` page was
+  removed. It had no visible content and generated an empty heading ID in the
+  migrated Markdown, so omitting it improves heading semantics and fragment
+  integrity without removing page content.
 
 ## URLs and Redirects
 
@@ -144,12 +148,17 @@ unavailable.
 - Extracted image alt text is retained where available.
 - Semantic landmarks, skip link, labeled forms, keyboard-operable navigation,
   language/direction attributes, and responsive layouts are present.
+- Sätteri heading attributes are enabled for Markdown and MDX, allowing stable
+  explicit fragment IDs such as `{#accepted-insurance-heading}`. The built-site
+  audit found no duplicate or invalid IDs and no missing same-page fragments.
+- Sätteri directive parsing is enabled. No named directive transformations are
+  registered yet, so unhandled directives must not be added to published
+  content until their semantic HTML rendering is defined.
 
 ## Validation Results
 
-- `npm install --ignore-scripts`: completed; 323 packages audited with one
-  moderate advisory. The current shell uses Node `20.17.0`, below the declared
-  `>=20.19.0`; `flake.nix` now selects Node 22.
+- `npm audit --offline`: passed with zero known vulnerabilities under Node
+  `24.18.0`; `flake.nix` provides a compatible current Node release.
 - `npm run audit:links`: passed with zero broken internal source links. The
   audit now checks generated routes, root-relative references, relative
   Markdown links, and public assets when rendered output is unavailable.
@@ -161,8 +170,8 @@ unavailable.
 - `npm run generate:redirects`: passed.
 - All migration `.mjs` tools and the sandbox DNS helper pass `node --check`.
 - The Astro compiler parsed all 49 `.astro` files successfully.
-- `npm run build`: blocked before compilation because this autonomous sandbox
-  cannot resolve `localhost`, causing `getaddrinfo EAI_AGAIN localhost`.
+- `npm run build`: passed with zero Astro diagnostics and generated 97 static
+  pages.
 - `npm run build:sandbox`: passed; generated 97 static pages.
 - Live contact-page structure was inspected in browser at a 1280px desktop
   viewport; local generated HTML was checked for the contact layout, Leaflet
@@ -172,9 +181,6 @@ unavailable.
 - Nix shell verification and `npm audit` retrieval were blocked by sandbox
   proxy/cache network resets.
 
-Run `npm run build` outside the Codex sandbox with Node 20.19+ or Node 22 for
-final production-build proof.
-
 ## Manual Review
 
 - Perform full-page desktop and mobile visual comparisons for page-specific
diff --git a/www/src/content/pages/en/schedule-consultation.mdx b/www/src/content/pages/en/schedule-consultation.mdx
index 98a2aff..d8d03ac 100644
--- a/www/src/content/pages/en/schedule-consultation.mdx
+++ b/www/src/content/pages/en/schedule-consultation.mdx
@@ -27,8 +27,6 @@ Sensory-Friendly Rooms
 
 Convenient & Affordable
 
-###### 
-
 ## ABA Therapy Services
 
 Arizona Institute for Autism (AIA) is home to leading experts in behavioral health and special education. We provide clinical care for children and teens diagnosed with autism and have a no wait list policy.