diff --git a/automod/cachestore/doc.go b/automod/cachestore/doc.go
new file mode 100644
index 00000000..246b0baa
--- /dev/null
+++ b/automod/cachestore/doc.go
@@ -0,0 +1,6 @@
+// Automod component for caching arbitary data (as JSON strings) with a fixed TTL and purging.
+//
+// Includes an interface and implementations using redis and in-process memory.
+//
+// This is used by the rules engine to cache things like account metadata, improving latency and reducing load on authoritative backend systems.
+package cachestore
diff --git a/automod/capture/doc.go b/automod/capture/doc.go
new file mode 100644
index 00000000..51449697
--- /dev/null
+++ b/automod/capture/doc.go
@@ -0,0 +1,4 @@
+// Automod development helpers for fetching and saving snapshots of real-world content and metadata.
+//
+// NOTE: real-world content is sensitive, even if it is abusive.
+package capture
diff --git a/automod/countstore/doc.go b/automod/countstore/doc.go
new file mode 100644
index 00000000..0bc66d4b
--- /dev/null
+++ b/automod/countstore/doc.go
@@ -0,0 +1,2 @@
+// Interface for fast atomic counters, and separate implmentations using redis and in-process memory.
+package countstore
diff --git a/automod/engine/doc.go b/automod/engine/doc.go
new file mode 100644
index 00000000..ef01f380
--- /dev/null
+++ b/automod/engine/doc.go
@@ -0,0 +1,2 @@
+// Core automod rules engine implementation and related types
+package engine
diff --git a/automod/flagstore/doc.go b/automod/flagstore/doc.go
new file mode 100644
index 00000000..597d7450
--- /dev/null
+++ b/automod/flagstore/doc.go
@@ -0,0 +1,2 @@
+// Interface for storing "flags", a form of private automod metadata.
+package flagstore
diff --git a/automod/rules/doc.go b/automod/rules/doc.go
new file mode 100644
index 00000000..95fa57de
--- /dev/null
+++ b/automod/rules/doc.go
@@ -0,0 +1,2 @@
+// Example automod rules and helpers.
+package rules
diff --git a/automod/setstore/doc.go b/automod/setstore/doc.go
new file mode 100644
index 00000000..df1c0067
--- /dev/null
+++ b/automod/setstore/doc.go
@@ -0,0 +1,2 @@
+// Interface for simple sets of strings, with fast inclusion checks.
+package setstore