diff --git a/.machine_readable/6a2/ECOSYSTEM.a2ml b/.machine_readable/6a2/ECOSYSTEM.a2ml
index 930b0eb..a1ec66e 100644
--- a/.machine_readable/6a2/ECOSYSTEM.a2ml
+++ b/.machine_readable/6a2/ECOSYSTEM.a2ml
@@ -3,7 +3,7 @@
   (metadata
     (name "a2ml-ecosystem")
     (version "0.1.0")
-    (updated "2026-06-27")
+    (updated "2026-09-09")
     (authority "coordination-hub")
     (semantic-authority "satellite"))
 
@@ -19,24 +19,20 @@
 
   (membership
     (implementations
-      (member "a2ml-rs" (group "implementations") (path "members/implementations/a2ml-rs") (branch "main") (repo "hyperpolymath/a2ml-rs"))
-      (member "a2ml_ex" (group "implementations") (path "members/implementations/a2ml_ex") (branch "main") (repo "hyperpolymath/a2ml_ex"))
-      (member "a2ml_gleam" (group "implementations") (path "members/implementations/a2ml_gleam") (branch "main") (repo "hyperpolymath/a2ml_gleam"))
-      (member "a2ml-deno" (group "implementations") (path "members/implementations/a2ml-deno") (branch "main") (repo "hyperpolymath/a2ml-deno"))
-      (member "a2ml-haskell" (group "implementations") (path "members/implementations/a2ml-haskell") (branch "main") (repo "hyperpolymath/a2ml-haskell")))
+      (member "a2ml-rs" (group "implementations") (path "rs") (branch "main") (repo "hyperpolymath/a2ml-rs"))
+      (member "a2ml_ex" (group "implementations") (path "ex") (branch "main") (repo "hyperpolymath/a2ml_ex"))
+      (member "a2ml_gleam" (group "implementations") (path "gleam") (branch "main") (repo "hyperpolymath/a2ml_gleam"))
+      (member "a2ml-deno" (group "implementations") (path "deno") (branch "main") (repo "hyperpolymath/a2ml-deno"))
+      (member "a2ml-haskell" (group "implementations") (path "haskell") (branch "main") (repo "hyperpolymath/a2ml-haskell")))
 
     (tooling
-      (member "tree-sitter-a2ml" (group "tooling") (path "members/tooling/tree-sitter-a2ml") (branch "main") (repo "hyperpolymath/tree-sitter-a2ml"))
-      (member "vscode-a2ml" (group "tooling") (path "members/tooling/vscode-a2ml") (branch "main") (repo "hyperpolymath/vscode-a2ml"))
-      (member "pandoc-a2ml" (group "tooling") (path "members/tooling/pandoc-a2ml") (branch "main") (repo "hyperpolymath/pandoc-a2ml"))
-      (member "a2mliser" (group "tooling") (path "members/tooling/a2mliser") (branch "main") (repo "hyperpolymath/a2mliser")))
+      (member "vscode-a2ml" (group "tooling") (path "members/tooling/vscode-a2ml") (branch "main") (repo "hyperpolymath/vscode-a2ml")))
 
     (ci
-      (member "a2ml-validate-action" (group "ci") (path "members/ci/a2ml-validate-action") (branch "main") (repo "hyperpolymath/a2ml-validate-action"))
-      (member "a2ml-pre-commit" (group "ci") (path "members/ci/a2ml-pre-commit") (branch "main") (repo "hyperpolymath/a2ml-pre-commit")))
+      (member "a2ml-validate-action" (group "ci") (path "validate-action") (branch "main") (repo "hyperpolymath/a2ml-validate-action")))
 
     (examples
-      (member "a2ml-showcase" (group "examples") (path "members/examples/a2ml-showcase") (branch "main") (repo "hyperpolymath/a2ml-showcase"))))
+      (member "a2ml-showcase" (group "examples") (path "showcase") (branch "main") (repo "hyperpolymath/a2ml-showcase"))))
 
   (related
     (related "contractiles-a2-lab" (relationship "private-lab-cross-reference") (repo "hyperpolymath/contractiles-a2-lab") (member false))))
diff --git a/members/ci/a2ml-pre-commit b/members/ci/a2ml-pre-commit
deleted file mode 160000
index 0308630..0000000
--- a/members/ci/a2ml-pre-commit
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit 030863006cc35b25ee965839b78e7b994b6bd0da
diff --git a/members/tooling/pandoc-a2ml b/members/tooling/pandoc-a2ml
deleted file mode 160000
index 4d02131..0000000
--- a/members/tooling/pandoc-a2ml
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit 4d021312dc507c5fe94573cc20b439b81da4baf0
diff --git a/members/tooling/tree-sitter-a2ml b/members/tooling/tree-sitter-a2ml
deleted file mode 160000
index 628b145..0000000
--- a/members/tooling/tree-sitter-a2ml
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit 628b145cf3a03fe15cef515a8ada1e58953b9dd4
diff --git a/scripts/check-membership.sh b/scripts/check-membership.sh
index 350527a..f04eb59 100755
--- a/scripts/check-membership.sh
+++ b/scripts/check-membership.sh
@@ -14,47 +14,39 @@ fail() {
 check_member() {
   local group="$1"
   local name="$2"
-  local url="https://github.com/hyperpolymath/${name}.git"
-  local path="members/${group}/${name}"
-  local module="submodule.${path}"
-  local actual_url
-  local actual_branch
-  local mode
+  local path="$3"
 
-  if ! grep -Fq "(member \"${name}\" (group \"${group}\")" .machine_readable/6a2/ECOSYSTEM.a2ml; then
-    fail ".machine_readable/6a2/ECOSYSTEM.a2ml missing ${group}/${name}"
+  if ! grep -Fq "(member \"${name}\" (group \"${group}\") (path \"${path}\")" .machine_readable/6a2/ECOSYSTEM.a2ml; then
+    fail ".machine_readable/6a2/ECOSYSTEM.a2ml missing ${group}/${name} at ${path}"
   fi
 
-  actual_url="$(git config -f .gitmodules --get "${module}.url" || true)"
-  if [[ "${actual_url}" != "${url}" ]]; then
-    fail ".gitmodules ${path} url is '${actual_url}', expected '${url}'"
+  if [[ ! -d "${path}" ]]; then
+    fail "${group}/${name} vendored directory '${path}' is missing"
+    return
   fi
 
-  actual_branch="$(git config -f .gitmodules --get "${module}.branch" || true)"
-  if [[ "${actual_branch}" != "main" ]]; then
-    fail ".gitmodules ${path} branch is '${actual_branch}', expected 'main'"
-  fi
-
-  mode="$(git ls-files -s "${path}" | awk '{print $1}')"
-  if [[ "${mode}" != "160000" ]]; then
-    fail "${path} is not a pinned submodule gitlink"
+  if ! git ls-files "${path}/" | grep -q .; then
+    fail "${group}/${name} vendored directory '${path}' has no tracked files"
   fi
 }
 
-check_member implementations a2ml-rs
-check_member implementations a2ml_ex
-check_member implementations a2ml_gleam
-check_member implementations a2ml-deno
-check_member implementations a2ml-haskell
-check_member tooling tree-sitter-a2ml
-check_member tooling vscode-a2ml
-check_member tooling pandoc-a2ml
-check_member tooling a2mliser
-check_member ci a2ml-validate-action
-check_member ci a2ml-pre-commit
-check_member examples a2ml-showcase
-
-if grep -R "contractiles-a2-lab" .gitmodules members >/dev/null 2>&1; then
+check_member implementations a2ml-rs rs
+check_member implementations a2ml_ex ex
+check_member implementations a2ml_gleam gleam
+check_member implementations a2ml-deno deno
+check_member implementations a2ml-haskell haskell
+check_member tooling vscode-a2ml members/tooling/vscode-a2ml
+check_member ci a2ml-validate-action validate-action
+check_member examples a2ml-showcase showcase
+
+# Members were consolidated into this monorepo by aa4b836. A surviving gitlink
+# without a matching .gitmodules entry breaks actions/checkout cleanup and can
+# never be initialized, so fail with the exact stale paths if one reappears.
+while IFS= read -r gitlink; do
+  [[ -n "${gitlink}" ]] && fail "orphan submodule gitlink remains at ${gitlink}"
+done < <(git ls-files -s | awk '$1 == "160000" { print $4 }')
+
+if grep -R "contractiles-a2-lab" members >/dev/null 2>&1; then
   fail "contractiles-a2-lab must not be a member submodule"
 fi