diff --git a/.codespellrc b/.codespellrc
new file mode 100644
index 00000000..7f9b3fa8
--- /dev/null
+++ b/.codespellrc
@@ -0,0 +1,16 @@
+[codespell]
+# Ignore intentional misspellings used as examples and technical terms
+# numer - intentional example typo in add-educational-comments.prompt.md
+# wit - proper technical term/name (sardonic wit, Gilfoyle character trait)
+# aks - Azure Kubernetes Service (AKS) abbreviation
+# edn - Extensible Data Notation (Clojure data format)
+# ser - serialization abbreviation
+# ois - ObjectInputStream abbreviation in Java
+# gir - valid abbreviation/technical term
+# rouge - Rouge is a syntax highlighter (not "rogue")
+# categor - TypeScript template literal in website/src/scripts/pages/skills.ts:70 (categor${...length > 1 ? "ies" : "y"})
+# aline - proper name (Aline Ávila, contributor)
+# ative - part of "Declarative Agents" in TypeSpec M365 Copilot documentation (collections/typespec-m365-copilot.collection.md)
+ignore-words-list = numer,wit,aks,edn,ser,ois,gir,rouge,categor,aline,ative,afterall,deques
+# Skip certain files and directories
+skip = .git,node_modules,package-lock.json,*.lock,website/build,website/.docusaurus
diff --git a/.github/copilot-instructions.md b/.github/copilot-instructions.md
index 4ebf9c97..e74c6fe8 100644
--- a/.github/copilot-instructions.md
+++ b/.github/copilot-instructions.md
@@ -25,7 +25,7 @@ The following instructions are only to be applied when performing a code review.
 - [ ] The instruction has a `description` field.
 - [ ] The `description` field is not empty.
 - [ ] The file name is lower case, with words separated by hyphens.
-- [ ] The instruction has an `applyTo` field that specifies the file or files to which the instructions apply. If they wish to specify multiple file paths they should formated like `'**.js, **.ts'`.
+- [ ] The instruction has an `applyTo` field that specifies the file or files to which the instructions apply. If they wish to specify multiple file paths they should formatted like `'**.js, **.ts'`.
 
 ## Agent file guide
 
diff --git a/.github/workflows/codespell.yml b/.github/workflows/codespell.yml
new file mode 100644
index 00000000..fa44e258
--- /dev/null
+++ b/.github/workflows/codespell.yml
@@ -0,0 +1,22 @@
+name: Check Spelling
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+permissions:
+  contents: read
+
+jobs:
+  codespell:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      
+      - name: Check spelling with codespell
+        uses: codespell-project/actions-codespell@v2
+        with:
+          check_filenames: true
+          check_hidden: false