diff --git a/.github/dependabot.yml b/.github/dependabot.yml
new file mode 100644
index 0000000000..90e05c40d0
--- /dev/null
+++ b/.github/dependabot.yml
@@ -0,0 +1,11 @@
+# To get started with Dependabot version updates, you'll need to specify which
+# package ecosystems to update and where the package manifests are located.
+# Please see the documentation for all configuration options:
+# https://docs.github.com/github/administering-a-repository/configuration-options-for-dependency-updates
+
+version: 2
+updates:
+  - package-ecosystem: "github-actions" # See documentation for possible values
+    directory: "/" # Location of package manifests
+    schedule:
+      interval: "weekly"
diff --git a/.github/workflows/bisects.yml b/.github/workflows/bisects.yml
index d3fce02516..ef6e160a06 100644
--- a/.github/workflows/bisects.yml
+++ b/.github/workflows/bisects.yml
@@ -15,7 +15,7 @@ jobs:
     name: ${{ matrix.platform }}-bisects
     runs-on: ${{ matrix.platform }}
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       - name: Install OpenSSL (Windows)
         if: |
diff --git a/.github/workflows/ci_docs.yml b/.github/workflows/ci_docs.yml
index 4cf7c7a837..74dd234a28 100644
--- a/.github/workflows/ci_docs.yml
+++ b/.github/workflows/ci_docs.yml
@@ -53,7 +53,7 @@ jobs:
 
     steps:
       - name: 'Checkout'
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           fetch-depth: 2
 
diff --git a/.github/workflows/ci_packages.yml b/.github/workflows/ci_packages.yml
index afd8d0696c..51ed2773b2 100644
--- a/.github/workflows/ci_packages.yml
+++ b/.github/workflows/ci_packages.yml
@@ -33,7 +33,7 @@ jobs:
       NIM_TESTAMENT_BATCH: ${{ matrix.batch }}
     steps:
       - name: 'Checkout'
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           fetch-depth: 2
 
diff --git a/.github/workflows/ci_publish.yml b/.github/workflows/ci_publish.yml
index 39fae32fea..d38a10d364 100644
--- a/.github/workflows/ci_publish.yml
+++ b/.github/workflows/ci_publish.yml
@@ -17,7 +17,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     steps:
       - name: 'Checkout'
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           fetch-depth: 2
 
@@ -60,7 +60,7 @@ jobs:
         run: nim c -r -d:release ci/action.nim
 
       - name: 'Comment'
-        uses: actions/github-script@v7
+        uses: actions/github-script@v8
         with:
           script: |
             const fs = require('fs');
diff --git a/.github/workflows/stale.yml b/.github/workflows/stale.yml
index 0c5a533e1d..b918b21050 100644
--- a/.github/workflows/stale.yml
+++ b/.github/workflows/stale.yml
@@ -9,7 +9,7 @@ jobs:
   stale:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/stale@v9
+      - uses: actions/stale@v10
         with:
           days-before-pr-stale:    365
           days-before-pr-close:    30
diff --git a/compiler/semtypinst.nim b/compiler/semtypinst.nim
index b290faec78..5f846c80ac 100644
--- a/compiler/semtypinst.nim
+++ b/compiler/semtypinst.nim
@@ -563,6 +563,26 @@ proc eraseVoidParams*(t: PType) =
       setLen t.n.sons, pos
       break
 
+proc eraseTupleVoidFields*(t: PType) =
+  ## Remove void fields from a named tuple type, compacting both `t.n`
+  ## (the field symbol nodes) and `t.sonsImpl` (the child types).
+  if t.n == nil: return  # anonymous tuple, nothing to compact
+  for i in 0..<t.kidsLen:
+    if t.n[i].kind == nkRecList or t[i].kind == tyVoid:
+      # found first void field, compact from here
+      var pos = i
+      for j in i+1..<t.kidsLen:
+        if t[j].kind != tyVoid and j < t.n.len and t.n[j].kind != nkRecList:
+          t.n[pos] = t.n[j]
+          t[pos] = t[j]
+          if t.n[pos].kind == nkSym:
+            t.n[pos].sym.position = pos
+          inc pos
+        # else: skip void entries
+      setLen t.n.sons, pos
+      t.setSonsLen pos
+      break
+
 proc skipIntLiteralParams*(t: PType; idgen: IdGenerator) =
   for i, p in t.ikids:
     if p == nil: continue
@@ -768,6 +788,8 @@ proc replaceTypeVarsTAux(cl: var TReplTypeVars, t: PType, isInstValue = false):
         propagateFieldFlags(result, result.n)
         if result.kind == tyObject and cl.c.computeRequiresInit(cl.c, result):
           result.incl tfRequiresInit
+        if result.kind == tyTuple:
+          eraseTupleVoidFields(result)
 
       of tyProc:
         eraseVoidParams(result)
diff --git a/lib/system/yrc.nim b/lib/system/yrc.nim
index 00b5d0f76e..29b6f70ef4 100644
--- a/lib/system/yrc.nim
+++ b/lib/system/yrc.nim
@@ -417,7 +417,8 @@ proc collectCycles() =
     cfprintf(cstderr, "[collectCycles] begin\n")
   yrcCollectorLock:
     mergePendingRoots()
-    if roots.len >= RootsThreshold and mayRunCycleCollect():
+    if roots.len >= rootsThreshold and mayRunCycleCollect():
+      let nRoots = roots.len
       var j: GcEnv
       init j.traceStack
       collectCyclesBacon(j, 0)
@@ -434,8 +435,11 @@ proc collectCycles() =
         elif rootsThreshold < high(int) div 4:
           rootsThreshold = (if rootsThreshold <= 0: defaultThreshold else: rootsThreshold)
           rootsThreshold = rootsThreshold div 2 +% rootsThreshold
-          # Cap growth so threshold doesn't grow without bound when we rarely free cycles
-          #rootsThreshold = min(rootsThreshold, defaultThreshold *% 16)
+          # Cost-aware: if this run was expensive (large graph), raise threshold more so we don't run again too soon
+          if j.touched > nRoots *% 4:
+            rootsThreshold = rootsThreshold div 2 +% rootsThreshold
+          rootsThreshold = min(rootsThreshold, defaultThreshold *% 16)
+          rootsThreshold = min(rootsThreshold, nRoots *% 2)
       when logOrc:
         cfprintf(cstderr, "[collectCycles] end; freed %ld new threshold %ld\n", j.freed, rootsThreshold)
       when defined(nimOrcStats):
diff --git a/tests/tuples/ttuples_issues.nim b/tests/tuples/ttuples_issues.nim
index 70defdfce9..0a640bfb76 100644
--- a/tests/tuples/ttuples_issues.nim
+++ b/tests/tuples/ttuples_issues.nim
@@ -131,3 +131,47 @@ static:
 
 main()
 mainProc()
+
+
+block:
+  type
+    Tuple[N] = tuple
+      a: int
+      b: N
+
+    TupleVoid = Tuple[void]
+
+  var x: TupleVoid = (a: 1, )
+  doAssert x.a == 1
+
+block:
+  type W[N] = seq[tuple[b: N]]
+  var _: W[void]
+
+block:
+  type Tuple2[N] = tuple
+    a: int
+    b: N
+    c: int
+
+  var y: Tuple2[void] = (a: 10, c: 20)
+  doAssert y.a == 10
+  doAssert y.c == 20
+
+block:
+  type Outer[N] = tuple
+    inner: tuple[x: int, y: N]
+
+  var o: Outer[void] = (inner: (x: 3, ))
+  doAssert o.inner.x == 3
+
+block:
+  type Tup[T] = tuple
+    a: int
+    b: T
+
+  proc f[T](t: Tup[T]): int =
+    result = t.a
+
+  var z: Tup[void] = (a: 7, )
+  doAssert f(z) == 7