diff --git a/specs/SUMMARY.md b/specs/SUMMARY.md
index 1e2ea3dab..597af6b50 100644
--- a/specs/SUMMARY.md
+++ b/specs/SUMMARY.md
@@ -41,7 +41,7 @@
         - [Honest Challenger](./experimental/fault-proof/stage-one/honest-challenger-fdg.md)
         - [Bond Incentives](./experimental/fault-proof/stage-one/bond-incentives.md)
       - [Bridge Integration](./experimental/fault-proof/stage-one/bridge-integration.md)
-  - [Custom Gas Token](./experimental/custom-gas-token.md)
+  - [Custom Gas Token](./granite/custom-gas-token.md)
   - [Plasma](./experimental/plasma.md)
   - [Interoperability](./interop/overview.md)
     - [Dependency Set](./interop/dependency_set.md)
diff --git a/specs/experimental/custom-gas-token.md b/specs/granite/custom-gas-token.md
similarity index 100%
rename from specs/experimental/custom-gas-token.md
rename to specs/granite/custom-gas-token.md
diff --git a/specs/granite/overview.md b/specs/granite/overview.md
new file mode 100644
index 000000000..58d48f5b3
--- /dev/null
+++ b/specs/granite/overview.md
@@ -0,0 +1,22 @@
+# Granite Network Upgrade
+
+<!-- START doctoc generated TOC please keep comment here to allow auto update -->
+<!-- DON'T EDIT THIS SECTION, INSTEAD RE-RUN doctoc TO UPDATE -->
+**Table of Contents**
+
+- [Execution Layer](#execution-layer)
+- [Consensus Layer](#consensus-layer)
+- [Smart Contracts](#smart-contracts)
+
+<!-- END doctoc generated TOC please keep comment here to allow auto update -->
+
+This document is not finalized and should be considered experimental.
+
+## Execution Layer
+
+## Consensus Layer
+
+## Smart Contracts
+
+- [Custom Gas Token](./custom-gas-token.md)
+- [Predeploys](./predeploys.md)
diff --git a/specs/granite/predeploys.md b/specs/granite/predeploys.md
new file mode 100644
index 000000000..84a1d2948
--- /dev/null
+++ b/specs/granite/predeploys.md
@@ -0,0 +1,16 @@
+# Predeploys
+
+<!-- START doctoc generated TOC please keep comment here to allow auto update -->
+<!-- DON'T EDIT THIS SECTION, INSTEAD RE-RUN doctoc TO UPDATE -->
+**Table of Contents**
+
+- [Predeploys](#predeploys)
+
+<!-- END doctoc generated TOC please keep comment here to allow auto update -->
+
+The granite network upgrade includes a routine upgrade
+of all L2 predeploys using system transactions. The exact
+and upgrade transactions themselves will be finalized in
+the future. This ensures that the L1 and L2 pairs of contracts
+(CrossDomainMessengers and StandardBridges) don't drift too
+far in their versioning.
diff --git a/specs/holocene/overview.md b/specs/holocene/overview.md
new file mode 100644
index 000000000..568348754
--- /dev/null
+++ b/specs/holocene/overview.md
@@ -0,0 +1,21 @@
+# Holocene Network Upgrade
+
+<!-- START doctoc generated TOC please keep comment here to allow auto update -->
+<!-- DON'T EDIT THIS SECTION, INSTEAD RE-RUN doctoc TO UPDATE -->
+**Table of Contents**
+
+- [Execution Layer](#execution-layer)
+- [Consensus Layer](#consensus-layer)
+- [Smart Contracts](#smart-contracts)
+
+<!-- END doctoc generated TOC please keep comment here to allow auto update -->
+
+This document is not finalized and should be considered experimental.
+
+## Execution Layer
+
+## Consensus Layer
+
+- [Interop](../interop/overview.md)
+
+## Smart Contracts