diff --git a/.agents/skills b/.agents/skills
new file mode 120000
index 0000000..6838a11
--- /dev/null
+++ b/.agents/skills
@@ -0,0 +1 @@
+../.ai/skills
\ No newline at end of file
diff --git a/.ai/skills/plain-english b/.ai/skills/plain-english
new file mode 120000
index 0000000..34d7feb
--- /dev/null
+++ b/.ai/skills/plain-english
@@ -0,0 +1 @@
+../../vendor/claude-plain-english-skill/skills/plain-english
\ No newline at end of file
diff --git a/.ai/skills/simple-english b/.ai/skills/simple-english
new file mode 120000
index 0000000..168706a
--- /dev/null
+++ b/.ai/skills/simple-english
@@ -0,0 +1 @@
+../../vendor/claude-plain-english-skill/skills/simple-english
\ No newline at end of file
diff --git a/.gitmodules b/.gitmodules
index b3d4418..b021115 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -28,3 +28,6 @@
 [submodule "vendor/stokowski"]
 	path = vendor/stokowski
 	url = git@github.com:bougyman/stokowski
+[submodule "vendor/claude-plain-english-skill"]
+	path = vendor/claude-plain-english-skill
+	url = git@github.com:b1rdmania/claude-plain-english-skill
diff --git a/AGENTS.md b/AGENTS.md
index e8307ef..fc9073a 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -3,6 +3,16 @@
 This document provides an index and source reference of guidelines, processes,
 and best practices for agents to follow.
 
+## Documents
+
+Use the [`simple-english`](vendor/claude-plain-english-skill/skills/simple-english) skill when
+authoring technical documentation or instructions.
+
+Use the [`plain-english`](vendor/claude-plain-english-skill/skills/plain-english) skill when
+authoring non-technical documentation, marketing copy, or other content intended for a general audience.
+
+Do not apply both to the same text.
+
 ## The Plan
 
 - Initial Plan: documents/initial-plan.adoc (historical snapshot - not
diff --git a/vendor/claude-plain-english-skill b/vendor/claude-plain-english-skill
new file mode 160000
index 0000000..1e1501e
--- /dev/null
+++ b/vendor/claude-plain-english-skill
@@ -0,0 +1 @@
+Subproject commit 1e1501e0e4da21d63b6611e2f258cf28c356a86c