diff --git a/common.ts b/common.ts
index b50d454e..8642afa4 100644
--- a/common.ts
+++ b/common.ts
@@ -26,11 +26,12 @@ export type CoreEvalProposal = ProposalCommon & {
 export type ProposalInfo = SoftwareUpgradeProposal | CoreEvalProposal;
 
 function readInfo(proposalPath: string): ProposalInfo {
-  const configPath = path.join('proposals', proposalPath, 'config.json');
-  const config = fs.readFileSync(configPath, 'utf-8');
+  const packageJsonPath = path.join('proposals', proposalPath, 'package.json');
+  const packageJson = fs.readFileSync(packageJsonPath, 'utf-8');
+  const { agoricProposal } = JSON.parse(packageJson);
   const [proposalIdentifier, proposalName] = proposalPath.split(':');
   return {
-    ...JSON.parse(config),
+    ...agoricProposal,
     proposalIdentifier,
     proposalName,
   };
diff --git a/proposals/16:upgrade-8/config.json b/proposals/16:upgrade-8/config.json
deleted file mode 100644
index 156f9c87..00000000
--- a/proposals/16:upgrade-8/config.json
+++ /dev/null
@@ -1,5 +0,0 @@
-{
-    "sdkImageTag": "29",
-    "planName": "agoric-upgrade-8",
-    "type": "Software Upgrade Proposal"
-}
diff --git a/proposals/16:upgrade-8/package.json b/proposals/16:upgrade-8/package.json
new file mode 100644
index 00000000..8d9e9d09
--- /dev/null
+++ b/proposals/16:upgrade-8/package.json
@@ -0,0 +1,7 @@
+{
+    "agoricProposal": {
+        "sdkImageTag": "29",
+        "planName": "agoric-upgrade-8",
+        "type": "Software Upgrade Proposal"
+    }
+}
diff --git a/proposals/29:upgrade-9/config.json b/proposals/29:upgrade-9/config.json
deleted file mode 100644
index f475c855..00000000
--- a/proposals/29:upgrade-9/config.json
+++ /dev/null
@@ -1,6 +0,0 @@
-{
-    "releaseNotes": "https://github.com/Agoric/agoric-sdk/releases/tag/pismoC",
-    "sdkImageTag": "31",
-    "planName": "agoric-upgrade-9",
-    "type": "Software Upgrade Proposal"
-}
diff --git a/proposals/29:upgrade-9/package.json b/proposals/29:upgrade-9/package.json
new file mode 100644
index 00000000..4d5a3166
--- /dev/null
+++ b/proposals/29:upgrade-9/package.json
@@ -0,0 +1,8 @@
+{
+    "agoricProposal": {
+        "releaseNotes": "https://github.com/Agoric/agoric-sdk/releases/tag/pismoC",
+        "sdkImageTag": "31",
+        "planName": "agoric-upgrade-9",
+        "type": "Software Upgrade Proposal"
+    }
+}
diff --git a/proposals/34:upgrade-10/config.json b/proposals/34:upgrade-10/config.json
deleted file mode 100644
index 65fe10b0..00000000
--- a/proposals/34:upgrade-10/config.json
+++ /dev/null
@@ -1,6 +0,0 @@
-{
-  "releaseNotes": "https://github.com/Agoric/agoric-sdk/releases/tag/mainnet1B-rc3",
-  "sdkImageTag": "35",
-  "planName": "agoric-upgrade-10",
-  "type": "Software Upgrade Proposal"
-}
diff --git a/proposals/34:upgrade-10/package.json b/proposals/34:upgrade-10/package.json
index 3f9dd87a..86ead8e9 100644
--- a/proposals/34:upgrade-10/package.json
+++ b/proposals/34:upgrade-10/package.json
@@ -1,4 +1,10 @@
 {
+    "agoricProposal": {
+        "releaseNotes": "https://github.com/Agoric/agoric-sdk/releases/tag/mainnet1B-rc3",
+        "sdkImageTag": "35",
+        "planName": "agoric-upgrade-10",
+        "type": "Software Upgrade Proposal"
+    },
     "type": "module",
     "license": "Apache-2.0",
     "dependencies": {
diff --git a/proposals/43:upgrade-11/config.json b/proposals/43:upgrade-11/config.json
deleted file mode 100644
index 687818c3..00000000
--- a/proposals/43:upgrade-11/config.json
+++ /dev/null
@@ -1,6 +0,0 @@
-{
-  "releaseNotes": "https://github.com/Agoric/agoric-sdk/releases/tag/agoric-upgrade-11",
-  "sdkImageTag": "36",
-  "planName": "agoric-upgrade-11",
-  "type": "Software Upgrade Proposal"
-}
diff --git a/proposals/43:upgrade-11/package.json b/proposals/43:upgrade-11/package.json
index 3f9dd87a..53813c5b 100644
--- a/proposals/43:upgrade-11/package.json
+++ b/proposals/43:upgrade-11/package.json
@@ -1,4 +1,10 @@
 {
+    "agoricProposal": {
+        "releaseNotes": "https://github.com/Agoric/agoric-sdk/releases/tag/agoric-upgrade-11",
+        "sdkImageTag": "36",
+        "planName": "agoric-upgrade-11",
+        "type": "Software Upgrade Proposal"
+    },
     "type": "module",
     "license": "Apache-2.0",
     "dependencies": {
diff --git a/proposals/49:smart-wallet-nft/config.json b/proposals/49:smart-wallet-nft/config.json
deleted file mode 100644
index 8acfb07d..00000000
--- a/proposals/49:smart-wallet-nft/config.json
+++ /dev/null
@@ -1,3 +0,0 @@
-{
-    "type": "/agoric.swingset.CoreEvalProposal"
-}
diff --git a/proposals/49:smart-wallet-nft/package.json b/proposals/49:smart-wallet-nft/package.json
index cce81aaf..88192823 100644
--- a/proposals/49:smart-wallet-nft/package.json
+++ b/proposals/49:smart-wallet-nft/package.json
@@ -1,4 +1,7 @@
 {
+    "agoricProposal": {
+        "type": "/agoric.swingset.CoreEvalProposal"
+    },
     "type": "module",
     "license": "Apache-2.0",
     "dependencies": {
diff --git a/proposals/53:kread-start/config.json b/proposals/53:kread-start/config.json
deleted file mode 100644
index 8acfb07d..00000000
--- a/proposals/53:kread-start/config.json
+++ /dev/null
@@ -1,3 +0,0 @@
-{
-    "type": "/agoric.swingset.CoreEvalProposal"
-}
diff --git a/proposals/53:kread-start/package.json b/proposals/53:kread-start/package.json
index f13654f5..a7c82063 100644
--- a/proposals/53:kread-start/package.json
+++ b/proposals/53:kread-start/package.json
@@ -1,4 +1,7 @@
 {
+  "agoricProposal": {
+    "type": "/agoric.swingset.CoreEvalProposal"
+  },
   "type": "module",
   "license": "Apache-2.0",
   "dependencies": {
diff --git a/proposals/55:statom-vaults/config.json b/proposals/55:statom-vaults/config.json
deleted file mode 100644
index 8acfb07d..00000000
--- a/proposals/55:statom-vaults/config.json
+++ /dev/null
@@ -1,3 +0,0 @@
-{
-    "type": "/agoric.swingset.CoreEvalProposal"
-}
diff --git a/proposals/55:statom-vaults/package.json b/proposals/55:statom-vaults/package.json
index cce81aaf..88192823 100644
--- a/proposals/55:statom-vaults/package.json
+++ b/proposals/55:statom-vaults/package.json
@@ -1,4 +1,7 @@
 {
+    "agoricProposal": {
+        "type": "/agoric.swingset.CoreEvalProposal"
+    },
     "type": "module",
     "license": "Apache-2.0",
     "dependencies": {
diff --git a/proposals/63:upgrade-12/config.json b/proposals/63:upgrade-12/config.json
deleted file mode 100644
index d3c13c23..00000000
--- a/proposals/63:upgrade-12/config.json
+++ /dev/null
@@ -1,6 +0,0 @@
-{
-    "releaseNotes": "https://github.com/Agoric/agoric-sdk/releases/tag/agoric-upgrade-12",
-    "sdkImageTag": "38",
-    "planName": "agoric-upgrade-12",
-    "type": "Software Upgrade Proposal"
-}
diff --git a/proposals/63:upgrade-12/package.json b/proposals/63:upgrade-12/package.json
index c001a9a4..62567749 100644
--- a/proposals/63:upgrade-12/package.json
+++ b/proposals/63:upgrade-12/package.json
@@ -1,4 +1,10 @@
 {
+    "agoricProposal": {
+        "releaseNotes": "https://github.com/Agoric/agoric-sdk/releases/tag/agoric-upgrade-12",
+        "sdkImageTag": "38",
+        "planName": "agoric-upgrade-12",
+        "type": "Software Upgrade Proposal"
+    },
     "type": "module",
     "license": "Apache-2.0",
     "dependencies": {
diff --git a/proposals/b:zoe1/config.json b/proposals/b:zoe1/config.json
deleted file mode 100644
index 8acfb07d..00000000
--- a/proposals/b:zoe1/config.json
+++ /dev/null
@@ -1,3 +0,0 @@
-{
-    "type": "/agoric.swingset.CoreEvalProposal"
-}
diff --git a/proposals/b:zoe1/package.json b/proposals/b:zoe1/package.json
index e4be4155..99ec844f 100644
--- a/proposals/b:zoe1/package.json
+++ b/proposals/b:zoe1/package.json
@@ -1,4 +1,7 @@
 {
+    "agoricProposal": {
+        "type": "/agoric.swingset.CoreEvalProposal"
+    },
     "type": "module",
     "license": "Apache-2.0",
     "dependencies": {