diff --git a/docs/contributing.md b/docs/contributing.md
index 02f9795..1807198 100644
--- a/docs/contributing.md
+++ b/docs/contributing.md
@@ -164,6 +164,12 @@ $ nix run nixpkgs#nvd -- diff \
 $ nix run nixpkgs#openssl -- rand -hex 64
 ```
 
+## Write code {#contributing-code}
+
+```{=include=} chapters html:into-file=//service-implementation-guide.html
+service-implementation-guide.md
+```
+
 ## Links that helped {#contributing-links}
 
 While creating NixOS tests:
diff --git a/docs/manual.md b/docs/manual.md
index bb0a0cb..670afe0 100644
--- a/docs/manual.md
+++ b/docs/manual.md
@@ -36,10 +36,6 @@ demos.md
 contributing.md
 ```
 
-```{=include=} chapters html:into-file=//service-implementation-guide.html
-service-implementation-guide.md
-```
-
 ```{=include=} appendix html:into-file=//options.html
 options.md
 ```
diff --git a/docs/redirects.json b/docs/redirects.json
index 019ccba..d2209d8 100644
--- a/docs/redirects.json
+++ b/docs/redirects.json
@@ -1463,6 +1463,9 @@
   "contributing-chat": [
     "contributing.html#contributing-chat"
   ],
+  "contributing-code": [
+    "contributing.html#contributing-code"
+  ],
   "contributing-deploy-colmena": [
     "contributing.html#contributing-deploy-colmena"
   ],