diff --git a/packages/base64/package.json b/packages/base64/package.json
index d27c8a7b7c..c4714f6f7a 100644
--- a/packages/base64/package.json
+++ b/packages/base64/package.json
@@ -54,11 +54,15 @@
     "typescript": "~5.6.1-rc"
   },
   "files": [
+    "./*.d.ts",
+    "./*.js",
+    "./*.map",
     "LICENSE*",
     "SECURITY*",
+    "dist",
+    "lib",
     "src",
-    "*.js",
-    "*.ts"
+    "tools"
   ],
   "publishConfig": {
     "access": "public"
diff --git a/packages/bundle-source/package.json b/packages/bundle-source/package.json
index fb66e18951..5df175f823 100644
--- a/packages/bundle-source/package.json
+++ b/packages/bundle-source/package.json
@@ -48,12 +48,15 @@
   },
   "keywords": [],
   "files": [
+    "./*.d.ts",
+    "./*.js",
+    "./*.map",
     "LICENSE*",
     "SECURITY*",
-    "rollup-*.tgz",
+    "dist",
+    "lib",
     "src",
-    "*.js",
-    "*.ts"
+    "tools"
   ],
   "repository": {
     "type": "git",
diff --git a/packages/captp/package.json b/packages/captp/package.json
index 4034086de1..d0217d8aba 100644
--- a/packages/captp/package.json
+++ b/packages/captp/package.json
@@ -22,11 +22,15 @@
     "test": "test"
   },
   "files": [
+    "./*.d.ts",
+    "./*.js",
+    "./*.map",
     "LICENSE*",
     "SECURITY*",
+    "dist",
+    "lib",
     "src",
-    "*.js",
-    "*.ts"
+    "tools"
   ],
   "repository": {
     "type": "git",
diff --git a/packages/check-bundle/package.json b/packages/check-bundle/package.json
index 182e3be733..2d30d56c88 100644
--- a/packages/check-bundle/package.json
+++ b/packages/check-bundle/package.json
@@ -60,11 +60,15 @@
     "typescript": "~5.6.1-rc"
   },
   "files": [
-    "*.js",
-    "*.ts",
+    "./*.d.ts",
+    "./*.js",
+    "./*.map",
     "LICENSE*",
     "SECURITY*",
-    "src"
+    "dist",
+    "lib",
+    "src",
+    "tools"
   ],
   "publishConfig": {
     "access": "public"
diff --git a/packages/cjs-module-analyzer/package.json b/packages/cjs-module-analyzer/package.json
index 8e5fe195e1..a7b9070d99 100644
--- a/packages/cjs-module-analyzer/package.json
+++ b/packages/cjs-module-analyzer/package.json
@@ -44,10 +44,15 @@
     "typescript": "~5.6.1-rc"
   },
   "files": [
+    "./*.d.ts",
+    "./*.js",
+    "./*.map",
     "LICENSE*",
     "SECURITY*",
-    "*.js",
-    "*.ts"
+    "dist",
+    "lib",
+    "src",
+    "tools"
   ],
   "publishConfig": {
     "access": "public"
diff --git a/packages/cli/package.json b/packages/cli/package.json
index c829bbfa60..7fb495bbfe 100644
--- a/packages/cli/package.json
+++ b/packages/cli/package.json
@@ -62,9 +62,15 @@
     "typescript": "~5.6.1-rc"
   },
   "files": [
+    "./*.d.ts",
+    "./*.js",
+    "./*.map",
     "LICENSE*",
     "SECURITY*",
-    "src"
+    "dist",
+    "lib",
+    "src",
+    "tools"
   ],
   "publishConfig": {
     "access": "public"
diff --git a/packages/common/package.json b/packages/common/package.json
index 4455837f8d..ecefc2212d 100644
--- a/packages/common/package.json
+++ b/packages/common/package.json
@@ -54,11 +54,15 @@
     "typescript": "~5.6.1-rc"
   },
   "files": [
-    "*.js",
-    "*.ts",
+    "./*.d.ts",
+    "./*.js",
+    "./*.map",
     "LICENSE*",
     "SECURITY*",
-    "src"
+    "dist",
+    "lib",
+    "src",
+    "tools"
   ],
   "publishConfig": {
     "access": "public"
diff --git a/packages/compartment-mapper/package.json b/packages/compartment-mapper/package.json
index 943e86c6f6..d204458d1e 100644
--- a/packages/compartment-mapper/package.json
+++ b/packages/compartment-mapper/package.json
@@ -73,11 +73,15 @@
     "typescript": "~5.6.1-rc"
   },
   "files": [
+    "./*.d.ts",
+    "./*.js",
+    "./*.map",
     "LICENSE*",
     "SECURITY*",
+    "dist",
+    "lib",
     "src",
-    "*.js",
-    "*.ts"
+    "tools"
   ],
   "publishConfig": {
     "access": "public"
diff --git a/packages/daemon/package.json b/packages/daemon/package.json
index 5f34aa7c0a..06ed74b45d 100644
--- a/packages/daemon/package.json
+++ b/packages/daemon/package.json
@@ -79,11 +79,15 @@
     "typescript": "~5.6.1-rc"
   },
   "files": [
+    "./*.d.ts",
+    "./*.js",
+    "./*.map",
     "LICENSE*",
     "SECURITY*",
+    "dist",
+    "lib",
     "src",
-    "*.js",
-    "*.ts"
+    "tools"
   ],
   "publishConfig": {
     "access": "public"
diff --git a/packages/env-options/package.json b/packages/env-options/package.json
index 6d950deef8..a0acdf3633 100644
--- a/packages/env-options/package.json
+++ b/packages/env-options/package.json
@@ -45,11 +45,15 @@
     "typescript": "~5.6.1-rc"
   },
   "files": [
-    "*.js",
-    "*.ts",
+    "./*.d.ts",
+    "./*.js",
+    "./*.map",
     "LICENSE*",
     "SECURITY*",
-    "src"
+    "dist",
+    "lib",
+    "src",
+    "tools"
   ],
   "publishConfig": {
     "access": "public"
diff --git a/packages/errors/package.json b/packages/errors/package.json
index ba41481e76..b04eca086a 100644
--- a/packages/errors/package.json
+++ b/packages/errors/package.json
@@ -48,11 +48,15 @@
     "typescript": "~5.6.1-rc"
   },
   "files": [
-    "*.js",
-    "*.ts",
+    "./*.d.ts",
+    "./*.js",
+    "./*.map",
     "LICENSE*",
     "SECURITY*",
-    "src"
+    "dist",
+    "lib",
+    "src",
+    "tools"
   ],
   "publishConfig": {
     "access": "public"
diff --git a/packages/eslint-plugin/package.json b/packages/eslint-plugin/package.json
index 7715b48437..3298c06732 100644
--- a/packages/eslint-plugin/package.json
+++ b/packages/eslint-plugin/package.json
@@ -37,5 +37,16 @@
   "license": "Apache-2.0",
   "repository": {
     "directory": "packages/eslint-plugin"
-  }
+  },
+  "files": [
+    "./*.d.ts",
+    "./*.js",
+    "./*.map",
+    "LICENSE*",
+    "SECURITY*",
+    "dist",
+    "lib",
+    "src",
+    "tools"
+  ]
 }
diff --git a/packages/evasive-transform/package.json b/packages/evasive-transform/package.json
index f4c22cf1a7..fb412d9bff 100644
--- a/packages/evasive-transform/package.json
+++ b/packages/evasive-transform/package.json
@@ -53,11 +53,15 @@
     "typescript": "~5.6.1-rc"
   },
   "files": [
-    "*.js",
-    "*.ts",
+    "./*.d.ts",
+    "./*.js",
+    "./*.map",
     "LICENSE*",
     "SECURITY*",
-    "src"
+    "dist",
+    "lib",
+    "src",
+    "tools"
   ],
   "publishConfig": {
     "access": "public"
diff --git a/packages/eventual-send/package.json b/packages/eventual-send/package.json
index 21993c2a1e..58adf171a5 100644
--- a/packages/eventual-send/package.json
+++ b/packages/eventual-send/package.json
@@ -50,11 +50,15 @@
     "wavy dot"
   ],
   "files": [
+    "./*.d.ts",
+    "./*.js",
+    "./*.map",
     "LICENSE*",
     "SECURITY*",
+    "dist",
+    "lib",
     "src",
-    "*.js",
-    "*.ts"
+    "tools"
   ],
   "eslintConfig": {
     "extends": [
diff --git a/packages/exo/package.json b/packages/exo/package.json
index b5e0a277ff..4c60251e9d 100644
--- a/packages/exo/package.json
+++ b/packages/exo/package.json
@@ -55,11 +55,15 @@
     "typescript": "~5.6.1-rc"
   },
   "files": [
-    "*.js",
-    "*.ts",
+    "./*.d.ts",
+    "./*.js",
+    "./*.map",
     "LICENSE*",
     "SECURITY*",
-    "src"
+    "dist",
+    "lib",
+    "src",
+    "tools"
   ],
   "publishConfig": {
     "access": "public"
diff --git a/packages/far/package.json b/packages/far/package.json
index d671d43c34..fadbf137ca 100644
--- a/packages/far/package.json
+++ b/packages/far/package.json
@@ -52,11 +52,15 @@
     "far"
   ],
   "files": [
+    "./*.d.ts",
+    "./*.js",
+    "./*.map",
     "LICENSE*",
     "SECURITY*",
+    "dist",
+    "lib",
     "src",
-    "*.js",
-    "*.ts"
+    "tools"
   ],
   "eslintConfig": {
     "extends": [
diff --git a/packages/immutable-arraybuffer/package.json b/packages/immutable-arraybuffer/package.json
index 2a4bed7509..7432914c09 100644
--- a/packages/immutable-arraybuffer/package.json
+++ b/packages/immutable-arraybuffer/package.json
@@ -43,11 +43,15 @@
     "typescript": "~5.6.1-rc"
   },
   "files": [
-    "*.js",
-    "*.ts",
+    "./*.d.ts",
+    "./*.js",
+    "./*.map",
     "LICENSE*",
     "SECURITY*",
-    "src"
+    "dist",
+    "lib",
+    "src",
+    "tools"
   ],
   "publishConfig": {
     "access": "public"
diff --git a/packages/import-bundle/package.json b/packages/import-bundle/package.json
index 117f7a08d5..57617c94ec 100644
--- a/packages/import-bundle/package.json
+++ b/packages/import-bundle/package.json
@@ -54,11 +54,15 @@
     "typescript": "~5.6.1-rc"
   },
   "files": [
+    "./*.d.ts",
+    "./*.js",
+    "./*.map",
     "LICENSE*",
     "SECURITY*",
+    "dist",
+    "lib",
     "src",
-    "*.js",
-    "*.ts"
+    "tools"
   ],
   "eslintConfig": {
     "extends": [
diff --git a/packages/init/package.json b/packages/init/package.json
index 82f602a7cc..5ad9319a71 100644
--- a/packages/init/package.json
+++ b/packages/init/package.json
@@ -40,11 +40,15 @@
     "@endo/promise-kit": "workspace:^"
   },
   "files": [
+    "./*.d.ts",
+    "./*.js",
+    "./*.map",
     "LICENSE*",
     "SECURITY*",
+    "dist",
+    "lib",
     "src",
-    "*.js",
-    "*.ts"
+    "tools"
   ],
   "repository": {
     "type": "git",
diff --git a/packages/lockdown/package.json b/packages/lockdown/package.json
index ce2454fedd..b143b67865 100644
--- a/packages/lockdown/package.json
+++ b/packages/lockdown/package.json
@@ -24,11 +24,15 @@
     "ses": "workspace:^"
   },
   "files": [
+    "./*.d.ts",
+    "./*.js",
+    "./*.map",
     "LICENSE*",
     "SECURITY*",
+    "dist",
+    "lib",
     "src",
-    "*.js",
-    "*.ts"
+    "tools"
   ],
   "repository": {
     "type": "git",
diff --git a/packages/lp32/package.json b/packages/lp32/package.json
index 98ea5b41ff..dec14d394e 100644
--- a/packages/lp32/package.json
+++ b/packages/lp32/package.json
@@ -69,11 +69,15 @@
     "typescript": "~5.6.1-rc"
   },
   "files": [
+    "./*.d.ts",
+    "./*.js",
+    "./*.map",
     "LICENSE*",
     "SECURITY*",
+    "dist",
+    "lib",
     "src",
-    "*.js",
-    "*.ts"
+    "tools"
   ],
   "publishConfig": {
     "access": "public"
diff --git a/packages/marshal/package.json b/packages/marshal/package.json
index 209d7e323f..17fbc46ee9 100644
--- a/packages/marshal/package.json
+++ b/packages/marshal/package.json
@@ -58,13 +58,15 @@
     "typescript": "~5.6.1-rc"
   },
   "files": [
+    "./*.d.ts",
+    "./*.js",
+    "./*.map",
     "LICENSE*",
     "SECURITY*",
-    "NEWS*",
+    "dist",
+    "lib",
     "src",
-    "*.js",
-    "*.ts",
-    "*.map"
+    "tools"
   ],
   "eslintConfig": {
     "extends": [
diff --git a/packages/memoize/package.json b/packages/memoize/package.json
index f8ebbe83a9..28f5e28e78 100644
--- a/packages/memoize/package.json
+++ b/packages/memoize/package.json
@@ -50,11 +50,15 @@
     "typescript": "~5.6.1-rc"
   },
   "files": [
-    "*.js",
-    "*.ts",
+    "./*.d.ts",
+    "./*.js",
+    "./*.map",
     "LICENSE*",
     "SECURITY*",
-    "src"
+    "dist",
+    "lib",
+    "src",
+    "tools"
   ],
   "publishConfig": {
     "access": "public"
diff --git a/packages/module-source/package.json b/packages/module-source/package.json
index 6893a70a36..ca2822a3e3 100644
--- a/packages/module-source/package.json
+++ b/packages/module-source/package.json
@@ -57,11 +57,15 @@
     "typescript": "~5.6.1-rc"
   },
   "files": [
+    "./*.d.ts",
+    "./*.js",
+    "./*.map",
     "LICENSE*",
     "SECURITY*",
+    "dist",
+    "lib",
     "src",
-    "*.js",
-    "*.ts"
+    "tools"
   ],
   "publishConfig": {
     "access": "public"
diff --git a/packages/nat/package.json b/packages/nat/package.json
index cb503f0fe5..ae0f2580cd 100644
--- a/packages/nat/package.json
+++ b/packages/nat/package.json
@@ -49,11 +49,15 @@
     "overflow"
   ],
   "files": [
+    "./*.d.ts",
+    "./*.js",
+    "./*.map",
     "LICENSE*",
     "SECURITY*",
+    "dist",
+    "lib",
     "src",
-    "*.js",
-    "*.ts"
+    "tools"
   ],
   "ava": {
     "files": [
diff --git a/packages/netstring/package.json b/packages/netstring/package.json
index 9e6f2f5f0e..1667311979 100644
--- a/packages/netstring/package.json
+++ b/packages/netstring/package.json
@@ -53,11 +53,15 @@
     "typescript": "~5.6.1-rc"
   },
   "files": [
+    "./*.d.ts",
+    "./*.js",
+    "./*.map",
     "LICENSE*",
     "SECURITY*",
+    "dist",
+    "lib",
     "src",
-    "*.js",
-    "*.ts"
+    "tools"
   ],
   "publishConfig": {
     "access": "public"
diff --git a/packages/pass-style/package.json b/packages/pass-style/package.json
index 0769522db6..0c59eeec45 100644
--- a/packages/pass-style/package.json
+++ b/packages/pass-style/package.json
@@ -54,11 +54,13 @@
     "typescript": "~5.6.1-rc"
   },
   "files": [
-    "*.js",
-    "*.ts",
-    "NEWS*",
+    "./*.d.ts",
+    "./*.js",
+    "./*.map",
     "LICENSE*",
     "SECURITY*",
+    "dist",
+    "lib",
     "src",
     "tools"
   ],
diff --git a/packages/patterns/package.json b/packages/patterns/package.json
index c6a4a6c580..9a20d5a7fa 100644
--- a/packages/patterns/package.json
+++ b/packages/patterns/package.json
@@ -52,11 +52,15 @@
     "typescript": "~5.6.1-rc"
   },
   "files": [
-    "*.js",
-    "*.ts",
+    "./*.d.ts",
+    "./*.js",
+    "./*.map",
     "LICENSE*",
     "SECURITY*",
-    "src"
+    "dist",
+    "lib",
+    "src",
+    "tools"
   ],
   "publishConfig": {
     "access": "public"
diff --git a/packages/promise-kit/package.json b/packages/promise-kit/package.json
index 5e826df92a..9ee8a1e8e3 100644
--- a/packages/promise-kit/package.json
+++ b/packages/promise-kit/package.json
@@ -53,11 +53,15 @@
     "typescript": "~5.6.1-rc"
   },
   "files": [
+    "./*.d.ts",
+    "./*.js",
+    "./*.map",
     "LICENSE*",
     "SECURITY*",
+    "dist",
+    "lib",
     "src",
-    "*.js",
-    "*.ts"
+    "tools"
   ],
   "publishConfig": {
     "access": "public"
diff --git a/packages/ses-ava/package.json b/packages/ses-ava/package.json
index c11c8beaa7..00b0c3a7bd 100644
--- a/packages/ses-ava/package.json
+++ b/packages/ses-ava/package.json
@@ -57,11 +57,15 @@
     "typescript": "~5.6.1-rc"
   },
   "files": [
+    "./*.d.ts",
+    "./*.js",
+    "./*.map",
     "LICENSE*",
     "SECURITY*",
+    "dist",
+    "lib",
     "src",
-    "*.js",
-    "*.ts"
+    "tools"
   ],
   "publishConfig": {
     "access": "public"
diff --git a/packages/ses/package.json b/packages/ses/package.json
index 49331bfafb..5b9fd06c31 100644
--- a/packages/ses/package.json
+++ b/packages/ses/package.json
@@ -97,14 +97,15 @@
     "typescript": "~5.6.1-rc"
   },
   "files": [
+    "./*.d.ts",
+    "./*.js",
+    "./*.map",
     "LICENSE*",
-    "NEWS*",
     "SECURITY*",
     "dist",
-    "types.d.ts",
-    "index.js",
-    "tools.js",
-    "src"
+    "lib",
+    "src",
+    "tools"
   ],
   "publishConfig": {
     "access": "public"
diff --git a/packages/skel/package.json b/packages/skel/package.json
index 08a8b13f22..1967766953 100644
--- a/packages/skel/package.json
+++ b/packages/skel/package.json
@@ -44,11 +44,15 @@
     "typescript": "~5.6.1-rc"
   },
   "files": [
-    "*.js",
-    "*.ts",
+    "./*.d.ts",
+    "./*.js",
+    "./*.map",
     "LICENSE*",
     "SECURITY*",
-    "src"
+    "dist",
+    "lib",
+    "src",
+    "tools"
   ],
   "publishConfig": {
     "access": "public"
diff --git a/packages/stream-node/package.json b/packages/stream-node/package.json
index 1cecd00529..9ba05e7fdd 100644
--- a/packages/stream-node/package.json
+++ b/packages/stream-node/package.json
@@ -61,11 +61,15 @@
     "typescript": "~5.6.1-rc"
   },
   "files": [
+    "./*.d.ts",
+    "./*.js",
+    "./*.map",
     "LICENSE*",
     "SECURITY*",
+    "dist",
+    "lib",
     "src",
-    "*.js",
-    "*.ts"
+    "tools"
   ],
   "publishConfig": {
     "access": "public"
diff --git a/packages/stream-types-test/package.json b/packages/stream-types-test/package.json
index c73a2f7156..9fb630e4c7 100644
--- a/packages/stream-types-test/package.json
+++ b/packages/stream-types-test/package.json
@@ -39,7 +39,17 @@
     "prettier": "^3.2.5",
     "typescript": "~5.6.1-rc"
   },
-  "files": [],
+  "files": [
+    "./*.d.ts",
+    "./*.js",
+    "./*.map",
+    "LICENSE*",
+    "SECURITY*",
+    "dist",
+    "lib",
+    "src",
+    "tools"
+  ],
   "publishConfig": {
     "access": "restricted"
   },
diff --git a/packages/stream/package.json b/packages/stream/package.json
index 22cc1fdec7..df513f285c 100644
--- a/packages/stream/package.json
+++ b/packages/stream/package.json
@@ -64,11 +64,15 @@
     "typescript": "~5.6.1-rc"
   },
   "files": [
+    "./*.d.ts",
+    "./*.js",
+    "./*.map",
     "LICENSE*",
     "SECURITY*",
+    "dist",
+    "lib",
     "src",
-    "*.js",
-    "*.ts"
+    "tools"
   ],
   "publishConfig": {
     "access": "public"
diff --git a/packages/syrup/package.json b/packages/syrup/package.json
index 041e82dfa0..aef8c409c2 100644
--- a/packages/syrup/package.json
+++ b/packages/syrup/package.json
@@ -51,11 +51,15 @@
     "typescript": "~5.6.1-rc"
   },
   "files": [
+    "./*.d.ts",
+    "./*.js",
+    "./*.map",
     "LICENSE*",
     "SECURITY*",
+    "dist",
+    "lib",
     "src",
-    "*.js",
-    "*.ts"
+    "tools"
   ],
   "private": true,
   "eslintConfig": {
diff --git a/packages/test262-runner/package.json b/packages/test262-runner/package.json
index c4a96bb780..c1065306cf 100644
--- a/packages/test262-runner/package.json
+++ b/packages/test262-runner/package.json
@@ -49,5 +49,16 @@
     "extends": [
       "plugin:@endo/internal"
     ]
-  }
+  },
+  "files": [
+    "./*.d.ts",
+    "./*.js",
+    "./*.map",
+    "LICENSE*",
+    "SECURITY*",
+    "dist",
+    "lib",
+    "src",
+    "tools"
+  ]
 }
diff --git a/packages/where/package.json b/packages/where/package.json
index 21aa671bf6..c046a219f7 100644
--- a/packages/where/package.json
+++ b/packages/where/package.json
@@ -49,11 +49,15 @@
     "typescript": "~5.6.1-rc"
   },
   "files": [
+    "./*.d.ts",
+    "./*.js",
+    "./*.map",
     "LICENSE*",
     "SECURITY*",
+    "dist",
+    "lib",
     "src",
-    "*.js",
-    "*.ts"
+    "tools"
   ],
   "publishConfig": {
     "access": "public"
diff --git a/packages/zip/package.json b/packages/zip/package.json
index 47fd84b449..0a9caa04d3 100644
--- a/packages/zip/package.json
+++ b/packages/zip/package.json
@@ -50,11 +50,15 @@
     "typescript": "~5.6.1-rc"
   },
   "files": [
+    "./*.d.ts",
+    "./*.js",
+    "./*.map",
     "LICENSE*",
     "SECURITY*",
+    "dist",
+    "lib",
     "src",
-    "*.js",
-    "*.ts"
+    "tools"
   ],
   "publishConfig": {
     "access": "public"
diff --git a/scripts/files-report.sh b/scripts/files-report.sh
new file mode 100644
index 0000000000..3d4a886d0d
--- /dev/null
+++ b/scripts/files-report.sh
@@ -0,0 +1,11 @@
+#!/bin/bash
+# Generates a report of all files that will be included in npm tarballs before
+# and after some changes between the generation of a pair of file lists.
+# Generate those lists with files.sh before and after pertientent code changes.
+# Use homogenize-files.sh to copy the "files" entry in
+# packages/skel/package.json over all other public packages.
+set -ueo pipefail
+echo '```diff'
+comm -23 "$1" "$2" | sed 's/^/< /'
+comm -13 "$1" "$2" | sed 's/^/> /'
+echo '```'
diff --git a/scripts/files.sh b/scripts/files.sh
new file mode 100644
index 0000000000..a97802a0a4
--- /dev/null
+++ b/scripts/files.sh
@@ -0,0 +1,13 @@
+#!/bin/bash
+# Generates a list of all the files that will be packed up for npm from all
+# packages.
+# Depends on GNU tar, which is gnu-tar in Homebrew, and revealed as gtar on the
+# PATH.
+set -ueo pipefail
+TAR=$(command -v gtar || command -v tar)
+while read -r PKG; do
+  (cd "$PKG"; yarn pack 1>&2)
+  # shellcheck disable=SC2097,SC2098,SC2016
+  PKG="$PKG" "$TAR" xf "$PKG/package.tgz" --to-command='echo "$PKG/${TAR_FILENAME#package/}"'
+done < <(npm query '.workspace:not([private])' | jq -r '.[].location') |
+sort
diff --git a/scripts/homogenize-files.sh b/scripts/homogenize-files.sh
new file mode 100644
index 0000000000..ffb7d55b33
--- /dev/null
+++ b/scripts/homogenize-files.sh
@@ -0,0 +1,21 @@
+#!/bin/bash
+
+# This script copies the "files" block from the package scaffold
+# (packages/skel) into every other package's package.json.
+# Review the results carefuly: some package deliberately deviate from the
+# common pattern, including "ses" with its extra "dist" directory.
+
+set -ueo pipefail
+
+FILES=$(jq .files packages/skel/package.json | git hash-object -w --stdin)
+
+while read -r PKGJSON; do
+  echo "$PKGJSON"
+  NEWPKGJSON=$(git hash-object -w <(
+    jq '. + ({files: $files[0]})' --slurpfile files <(git cat-file blob "$FILES") "$PKGJSON"
+  ))
+  git cat-file blob "$NEWPKGJSON" > "$PKGJSON"
+done < <(
+  npm query '.workspace:not([private])' |
+  jq -r '.[].location | "\(.)/package.json"'
+)