diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 97ddba34..7b5251a3 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -261,7 +261,7 @@ jobs:
             --input "$RUN_DIR" \
             --build build \
             --check-source 100 \
-            --check-source-regions 91 \
+            --check-source-regions 95 \
             --require-source-files \
             --json coverage/e2e/report.json \
             --text coverage/e2e/report.txt
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index a68c517f..b24425db 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -256,7 +256,7 @@ node tests/tools/e2e-coverage-run.mjs seal \
   --dir "$RUN_DIR" --status passed
 npm run report:e2e:coverage -- \
   --input "$RUN_DIR" --build build \
-  --check-source 100 --check-source-regions 91 \
+  --check-source 100 --check-source-regions 95 \
   --require-source-files \
   --json "coverage/e2e/$RUN_ID-report.json" \
   --text "coverage/e2e/$RUN_ID-report.txt"
diff --git a/tests/e2e-coverage-gate.test.mjs b/tests/e2e-coverage-gate.test.mjs
index 7d7f47a2..db376793 100644
--- a/tests/e2e-coverage-gate.test.mjs
+++ b/tests/e2e-coverage-gate.test.mjs
@@ -32,13 +32,15 @@ const REPORT_SCRIPT = 'report:e2e:coverage';
 const COVERAGE_JOB = 'e2e-coverage';
 
 // Measured on the suite this commit ships: the e2e-coverage job renders with
-// `--check-source 100 --check-source-regions 91` and the run clears both; the
+// `--check-source 100 --check-source-regions 95` and the run clears both; the
 // full suite measured 100.00% source lines and 81.43% source regions when the
-// region gate landed (#1026, #1031), and 91.63% source regions when the floor
-// was ratcheted to 91 (#1105).
+// region gate landed (#1026, #1031), 91.63% source regions when the floor was
+// ratcheted to 91 (#1105), and 95.22% (438/460) when it was ratcheted to 95
+// after #1163 folded the crossing-region source-map drift and #1060 covered
+// the member-directory toolbar arms (#1079).
 const FLOORS = {
   '--check-source': 100,
-  '--check-source-regions': 91,
+  '--check-source-regions': 95,
 };
 
 // Present-or-absent guarantees, which carry no percentage. --require-source-files
@@ -188,10 +190,10 @@ test('a job that never invokes the reporter fails the guard', () => {
 // fixture text it edits is its own line, so it gets its own staleness guard
 // and its own proof the floor can go red.
 function weakenedRegions(replacement) {
-  const original = '            --check-source-regions 91 \\\n';
+  const original = '            --check-source-regions 95 \\\n';
   assert.ok(
     workflowText.includes(original),
-    'fixture is stale: ci.yml no longer renders with --check-source-regions 91',
+    'fixture is stale: ci.yml no longer renders with --check-source-regions 95',
   );
   return workflowText.replace(original, replacement);
 }
@@ -204,7 +206,7 @@ test('a lowered --check-source-regions fails the guard', () => {
           weakenedRegions('            --check-source-regions 50 \\\n'),
         ),
       ),
-    /--check-source-regions is 50, below the 91/,
+    /--check-source-regions is 50, below the 95/,
   );
 });
 
diff --git a/tests/workflow-scripts.test.mjs b/tests/workflow-scripts.test.mjs
index 9f5f531f..25acdbe6 100644
--- a/tests/workflow-scripts.test.mjs
+++ b/tests/workflow-scripts.test.mjs
@@ -347,13 +347,15 @@ test('browser coverage is isolated in a visible gating job with a source floor',
   // uncovered ternary arm or short-circuit that shares a line with covered
   // code is invisible to --check-source. The region floor is the granularity
   // the line gate cannot give. The gate landed at 80, just under the 81.43%
-  // a full run of the suite measured at the time, and was ratcheted to 91
+  // a full run of the suite measured at the time, was ratcheted to 91
   // under the 91.63% measured after the 2026-10-07 coverage merges (#1105),
-  // the same ratchet pattern as the unit lane's region floors.
+  // and to 95 under the 95.22% measured after #1163 folded the
+  // crossing-region source-map drift (#1079) -- the same ratchet pattern as
+  // the unit lane's region floors.
   assert.match(
     coverageCommands,
-    /--check-source-regions\s+91\b/,
-    'the e2e coverage report must gate on --check-source-regions 91',
+    /--check-source-regions\s+95\b/,
+    'the e2e coverage report must gate on --check-source-regions 95',
   );
   // #992: the ratio is computed over observed files only, so a src module the
   // bundle drops vanishes from numerator and denominator alike. The file-set