diff --git a/.arclint b/.arclint
--- a/.arclint
+++ b/.arclint
@@ -247,7 +247,8 @@
             "type": "lint-markdown",
             "include": [
                 "(\\.md$)"
-            ]
+            ],
+            "exclude": "(^contrib/gitian-builder/)"
         }
     }
 }
diff --git a/arcanist/linter/MarkdownLinter.php b/arcanist/linter/MarkdownLinter.php
--- a/arcanist/linter/MarkdownLinter.php
+++ b/arcanist/linter/MarkdownLinter.php
@@ -39,11 +39,12 @@
 
   private function isValidLink($currentPath, $link) {
     /*
-     *  File anchors are not tested and always considered valid.
+     *  File anchors should only contain lowercase alphanum chars, underscores
+     *  or hyphens.
      *  TODO: check that anchors have a corresponding section.
      */
     if ($link[0] === '#') {
-      return true;
+      return preg_match('/^#[a-z0-9_\-]+$/', $link);
     }
 
     /*
@@ -75,7 +76,7 @@
     $fileContent = Filesystem::readFile($path);
 
     /* Check for broken links (typos in URL of missing target file) */
-    $pattern = '/\[[^\]]+\]\(([^)]+\.[^ "#)]+)#?[^)]*\)/';
+    $pattern = '/\[[^\]]+\]\((#?[^ "#)]+)#?[^)]*\)/';
     if (preg_match_all($pattern, $fileContent, $matches, PREG_OFFSET_CAPTURE)) {
       foreach ($matches[1] as $match) {
         list($link, $offset) = $match;
diff --git a/contrib/README.md b/contrib/README.md
--- a/contrib/README.md
+++ b/contrib/README.md
@@ -5,9 +5,6 @@
 Specific tools for developers working on this repository.
 Contains the script `github-merge.py` for merging GitHub pull requests securely and signing them using GPG.
 
-### [Verify-Commits](/contrib/verify-commits) ###
-Tool to verify that every merge commit was signed by a developer using the above `github-merge.py` script.
-
 ### [Linearize](/contrib/linearize) ###
 Construct a linear, no-fork, best version of the blockchain.
 
@@ -28,8 +25,8 @@
 ### [Gitian-descriptors](/contrib/gitian-descriptors) ###
 Notes on getting Gitian builds up and running using KVM.
 
-### [Gitian-keys](/contrib/gitian-keys)
-PGP keys used for signing Bitcoin Core [Gitian release](/doc/release-process.md) results.
+### [Gitian-signing](/contrib/gitian-signing)
+PGP keys used for signing Bitcoin ABC [Gitian release](/doc/release-process.md) results.
 
 ### [MacDeploy](/contrib/macdeploy) ###
 Scripts and notes for Mac builds.
diff --git a/doc/developer-notes.md b/doc/developer-notes.md
--- a/doc/developer-notes.md
+++ b/doc/developer-notes.md
@@ -46,9 +46,9 @@
 Various coding styles have been used during the history of the codebase,
 and the result is not very consistent. However, we're now trying to converge to
 a single style, so please use it in new code. Old code will be converted
-gradually and you are encouraged to use the provided
-[clang-format-diff script](/contrib/devtools/README.md#clang-format-diffpy)
-to clean up the patch automatically before submitting a pull request.
+gradually and a handful of linters will help you to clean up your patches before
+submitting them for review. These linters are run automatically when using
+`arc diff` but can also be explicitly called with `arc lint`.
 
 - Basic rules specified in [src/.clang-format](/src/.clang-format).
   - Braces on new lines for namespaces, classes, functions, methods.
diff --git a/src/qt/README.md b/src/qt/README.md
--- a/src/qt/README.md
+++ b/src/qt/README.md
@@ -16,7 +16,7 @@
 
 ### forms
 
-Contains [Designer UI](http://doc.qt.io/qt-5.9/designer-using-a-ui-file.html) files. They are created with [Qt Creator](#use-qt-Creator-as IDE), but can be edited using any text editor.
+Contains [Designer UI](http://doc.qt.io/qt-5.9/designer-using-a-ui-file.html) files. They are created with [Qt Creator](#using-qt-creator-as-ide), but can be edited using any text editor.
 
 ### locale