diff --git a/apps/api-extractor/package.json b/apps/api-extractor/package.json
index 4eeb35021d..8b381d8c16 100644
--- a/apps/api-extractor/package.json
+++ b/apps/api-extractor/package.json
@@ -35,6 +35,7 @@
       "import": "./lib-esm/index.js",
       "require": "./lib-commonjs/index.js"
     },
+    "./extends/*.json": "./extends/*.json",
     "./lib/*.schema.json": "./lib-commonjs/*.schema.json",
     "./lib/*": {
       "types": "./lib-dts/*.d.ts",
diff --git a/common/changes/@microsoft/api-extractor/fix-missing-exports_2026-02-21-19-28.json b/common/changes/@microsoft/api-extractor/fix-missing-exports_2026-02-21-19-28.json
new file mode 100644
index 0000000000..b90352304e
--- /dev/null
+++ b/common/changes/@microsoft/api-extractor/fix-missing-exports_2026-02-21-19-28.json
@@ -0,0 +1,10 @@
+{
+  "changes": [
+    {
+      "packageName": "@microsoft/api-extractor",
+      "comment": "Add missing \"./extends/*.json\" to the package.json \"exports\" field so that \"@microsoft/api-extractor/extends/tsdoc-base.json\" is importable.",
+      "type": "patch"
+    }
+  ],
+  "packageName": "@microsoft/api-extractor"
+}
diff --git a/common/changes/@rushstack/heft-jest-plugin/fix-missing-exports_2026-02-21-19-28.json b/common/changes/@rushstack/heft-jest-plugin/fix-missing-exports_2026-02-21-19-28.json
new file mode 100644
index 0000000000..8ca4a9bfba
--- /dev/null
+++ b/common/changes/@rushstack/heft-jest-plugin/fix-missing-exports_2026-02-21-19-28.json
@@ -0,0 +1,10 @@
+{
+  "changes": [
+    {
+      "packageName": "@rushstack/heft-jest-plugin",
+      "comment": "Add missing \"./includes/*.json\" to the package.json \"exports\" field so that Jest config files like \"@rushstack/heft-jest-plugin/includes/jest-shared.config.json\" are importable.",
+      "type": "patch"
+    }
+  ],
+  "packageName": "@rushstack/heft-jest-plugin"
+}
diff --git a/heft-plugins/heft-jest-plugin/package.json b/heft-plugins/heft-jest-plugin/package.json
index 3a1a05c3c5..8c164853aa 100644
--- a/heft-plugins/heft-jest-plugin/package.json
+++ b/heft-plugins/heft-jest-plugin/package.json
@@ -53,6 +53,7 @@
     "jest-watch-select-projects": "2.0.0"
   },
   "exports": {
+    "./includes/*.json": "./includes/*.json",
     "./lib/*.schema.json": "./lib-commonjs/*.schema.json",
     "./lib/*": {
       "types": "./lib-dts/*.d.ts",