diff --git a/.cargo/config.toml b/.cargo/config.toml
index 4fcaf44..6714d9b 100644
--- a/.cargo/config.toml
+++ b/.cargo/config.toml
@@ -20,19 +20,17 @@ ICEBUG_DIR = { value = "icebug", relative = true }
 # - macOS .app bundles stage them under Contents/Frameworks
 # - cargo dev/test binaries resolve ../../../ entries
 #   (target/{debug,release}/deps/ -> repo root)
-# Absolute well-known rpaths (macOS only): the algo extension is downloaded
-# at runtime and its own LC_RPATHs point at its build machine, so its
-# @rpath deps (libarrow, libomp, libnetworkit) expand against *this*
-# binary's rpaths. These entries let it resolve from Homebrew / system
-# locations with no DYLD_LIBRARY_PATH. Missing dirs are harmless.
+# Vendored dirs come first so the pinned prebuilts (./liblbug,
+# ./icebug/lib) always win over ambient copies (e.g. a Homebrew
+# ladybug/libnetworkit): an incompatible ambient lib resolved first
+# segfaults (lbug) or fails LOAD (algo extension) with no graceful
+# error. Absolute well-known rpaths (macOS only) follow: the algo
+# extension is downloaded at runtime and its own LC_RPATHs point at its
+# build machine, so its @rpath deps (libarrow, libomp) expand against
+# *this* binary's rpaths. These entries let it resolve from Homebrew /
+# system locations with no DYLD_LIBRARY_PATH. Missing dirs are harmless.
 [target.aarch64-apple-darwin]
 rustflags = [
-  "-C", "link-arg=-Wl,-rpath,/opt/homebrew/lib",
-  "-C", "link-arg=-Wl,-rpath,/opt/homebrew/opt/apache-arrow/lib",
-  "-C", "link-arg=-Wl,-rpath,/opt/homebrew/opt/libomp/lib",
-  "-C", "link-arg=-Wl,-rpath,/usr/local/lib",
-  "-C", "link-arg=-Wl,-rpath,/usr/local/opt/apache-arrow/lib",
-  "-C", "link-arg=-Wl,-rpath,/usr/local/opt/libomp/lib",
   "-C", "link-arg=-Wl,-rpath,@executable_path",
   "-C", "link-arg=-Wl,-rpath,@executable_path/icebug/lib",
   "-C", "link-arg=-Wl,-rpath,@executable_path/liblbug",
@@ -44,16 +42,16 @@ rustflags = [
   "-C", "link-arg=-Wl,-rpath,@executable_path/../../../../liblbug",
   "-C", "link-arg=-Wl,-rpath,@executable_path/../../../icebug/lib",
   "-C", "link-arg=-Wl,-rpath,@executable_path/../../../../icebug/lib",
-]
-
-[target.x86_64-apple-darwin]
-rustflags = [
   "-C", "link-arg=-Wl,-rpath,/opt/homebrew/lib",
   "-C", "link-arg=-Wl,-rpath,/opt/homebrew/opt/apache-arrow/lib",
   "-C", "link-arg=-Wl,-rpath,/opt/homebrew/opt/libomp/lib",
   "-C", "link-arg=-Wl,-rpath,/usr/local/lib",
   "-C", "link-arg=-Wl,-rpath,/usr/local/opt/apache-arrow/lib",
   "-C", "link-arg=-Wl,-rpath,/usr/local/opt/libomp/lib",
+]
+
+[target.x86_64-apple-darwin]
+rustflags = [
   "-C", "link-arg=-Wl,-rpath,@executable_path",
   "-C", "link-arg=-Wl,-rpath,@executable_path/icebug/lib",
   "-C", "link-arg=-Wl,-rpath,@executable_path/liblbug",
@@ -65,6 +63,12 @@ rustflags = [
   "-C", "link-arg=-Wl,-rpath,@executable_path/../../../../liblbug",
   "-C", "link-arg=-Wl,-rpath,@executable_path/../../../icebug/lib",
   "-C", "link-arg=-Wl,-rpath,@executable_path/../../../../icebug/lib",
+  "-C", "link-arg=-Wl,-rpath,/opt/homebrew/lib",
+  "-C", "link-arg=-Wl,-rpath,/opt/homebrew/opt/apache-arrow/lib",
+  "-C", "link-arg=-Wl,-rpath,/opt/homebrew/opt/libomp/lib",
+  "-C", "link-arg=-Wl,-rpath,/usr/local/lib",
+  "-C", "link-arg=-Wl,-rpath,/usr/local/opt/apache-arrow/lib",
+  "-C", "link-arg=-Wl,-rpath,/usr/local/opt/libomp/lib",
 ]
 
 [target.aarch64-unknown-linux-gnu]
diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index e39175d..464efed 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -36,13 +36,14 @@ jobs:
           wget -qO- --timeout=60 --tries=3 https://apt.llvm.org/llvm-snapshot.gpg.key | sudo tee /etc/apt/trusted.gpg.d/llvm-snapshot.asc
           echo "deb http://apt.llvm.org/jammy llvm-toolchain-jammy-20 main" | sudo tee /etc/apt/sources.list.d/llvm20.list
           # Apache Arrow repo (icebug's cxx bridge needs arrow headers).
-          # Pinned to 25.0.1: the icebug prebuilt links libarrow.so.2500; the
-          # repo now defaults to 26.x, which breaks test/runtime loads.
+          # Pinned to 26.0.0 to match the Linux icebug 13.5 prebuilt, which
+          # links libarrow.so.2600 (macOS/Windows 13.5 builds link
+          # libarrow.2500, so they stay on the Arrow 25 setup).
           wget --timeout=60 --tries=3 https://apache.jfrog.io/artifactory/arrow/ubuntu/apache-arrow-apt-source-latest-jammy.deb
           sudo apt-get install -y ./apache-arrow-apt-source-latest-jammy.deb
           # Bound mirror stalls: fail fast instead of hanging the run for hours.
           sudo apt-get -o Acquire::Retries=3 -o Acquire::http::Timeout=60 -o Acquire::https::Timeout=60 update
-          sudo apt-get -o Acquire::Retries=3 -o Acquire::http::Timeout=60 -o Acquire::https::Timeout=60 install -y --no-install-recommends gcc-13 g++-13 cmake pkg-config libssl-dev libxkbcommon-dev libxkbcommon-x11-dev libwayland-dev libarrow-dev=25.0.1-1 libarrow2500=25.0.1-1 libomp-20-dev
+          sudo apt-get -o Acquire::Retries=3 -o Acquire::http::Timeout=60 -o Acquire::https::Timeout=60 install -y --no-install-recommends gcc-13 g++-13 cmake pkg-config libssl-dev libxkbcommon-dev libxkbcommon-x11-dev libwayland-dev libarrow-dev=26.0.0-1 libarrow2600=26.0.0-1 libomp-20-dev
           echo "CC=gcc-13" >> "$GITHUB_ENV"
           echo "CXX=g++-13" >> "$GITHUB_ENV"
 
@@ -95,14 +96,7 @@ jobs:
         run: cargo clippy --all-targets -- -D warnings
 
       - name: Run tests
-        run: |
-          # The algo extension served by INSTALL algo is currently ABI-
-          # incompatible with pinned lbug 0.21.2: its GDS calls segfault
-          # inside native code (signal 11, no graceful error), killing the
-          # whole test harness. Skip those tests until upstream publishes
-          # compatible bits; re-enable by dropping the --skip flags.
-          # local_leiden_two_cliques (in-process icebug) still runs.
-          cargo test -- --skip gds_leiden_two_cliques --skip gds_page_rank_star --skip gds_page_rank_stale_projection_serves_live_storage
+        run: cargo test
 
   build:
     needs: lint
@@ -160,13 +154,14 @@ jobs:
           wget -qO- --timeout=60 --tries=3 https://apt.llvm.org/llvm-snapshot.gpg.key | sudo tee /etc/apt/trusted.gpg.d/llvm-snapshot.asc
           echo "deb http://apt.llvm.org/jammy llvm-toolchain-jammy-20 main" | sudo tee /etc/apt/sources.list.d/llvm20.list
           # Apache Arrow repo (icebug's cxx bridge needs arrow headers).
-          # Pinned to 25.0.1: the icebug prebuilt links libarrow.so.2500; the
-          # repo now defaults to 26.x, which breaks test/runtime loads.
+          # Pinned to 26.0.0 to match the Linux icebug 13.5 prebuilt, which
+          # links libarrow.so.2600 (macOS/Windows 13.5 builds link
+          # libarrow.2500, so they stay on the Arrow 25 setup).
           wget --timeout=60 --tries=3 https://apache.jfrog.io/artifactory/arrow/ubuntu/apache-arrow-apt-source-latest-jammy.deb
           sudo apt-get install -y ./apache-arrow-apt-source-latest-jammy.deb
           # Bound mirror stalls: fail fast instead of hanging the run for hours.
           sudo apt-get -o Acquire::Retries=3 -o Acquire::http::Timeout=60 -o Acquire::https::Timeout=60 update
-          sudo apt-get -o Acquire::Retries=3 -o Acquire::http::Timeout=60 -o Acquire::https::Timeout=60 install -y --no-install-recommends gcc-13 g++-13 cmake pkg-config libssl-dev libxkbcommon-dev libxkbcommon-x11-dev libwayland-dev libarrow-dev=25.0.1-1 libarrow2500=25.0.1-1 libomp-20-dev
+          sudo apt-get -o Acquire::Retries=3 -o Acquire::http::Timeout=60 -o Acquire::https::Timeout=60 install -y --no-install-recommends gcc-13 g++-13 cmake pkg-config libssl-dev libxkbcommon-dev libxkbcommon-x11-dev libwayland-dev libarrow-dev=26.0.0-1 libarrow2600=26.0.0-1 libomp-20-dev
           echo "CC=gcc-13" >> "$GITHUB_ENV"
           echo "CXX=g++-13" >> "$GITHUB_ENV"
 
@@ -299,9 +294,6 @@ jobs:
           # The test INSTALLs the algo extension from the official repo and
           # LOADs it at runtime: its libarrow dep resolves via our rpaths
           # (vendored above) on Unix, via PATH (vcpkg) on Windows.
-          # NOTE: the currently served algo builds segfault inside native
-          # code against pinned lbug 0.21.2 (see lint job) — same skip here
-          # until upstream publishes compatible bits.
           if [ "$RUNNER_OS" = "Windows" ]; then
             # NB: networkit_state.dll lives in the icebug/lib/networkit
             # subdir (the win prebuilt splits GlobalState out of the static
@@ -314,7 +306,15 @@ jobs:
           fi
           # --lib --test selects only these targets so the GUI binary
           # itself is not linked here (it gets built in the next step).
-          cargo test --release --target ${{ matrix.target }} --lib --test gds_page_rank -- --skip gds_page_rank_star --skip gds_page_rank_stale_projection_serves_live_storage
+          # The served 0.22.0 extension needs NetworKit symbols + Arrow 26:
+          # satisfiable on Linux (icebug 13.5 prebuilt + apt libarrow2600).
+          # macOS/Windows stay on the Arrow 25-era stack, where the extension
+          # can't LOAD (clean failure, but it fails the gate all the same),
+          # so those platforms skip the extension tests.
+          SKIP_ARGS="--skip gds_page_rank_star --skip gds_page_rank_stale_projection_serves_live_storage"
+          if [ "$RUNNER_OS" = "Linux" ]; then SKIP_ARGS=""; fi
+          # shellcheck disable=SC2086
+          cargo test --release --target ${{ matrix.target }} --lib --test gds_page_rank -- $SKIP_ARGS
 
       - name: Build release binary
         run: cargo build --release --target ${{ matrix.target }}
diff --git a/Cargo.lock b/Cargo.lock
index 4cf5e7a..cb1f8e2 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -3568,9 +3568,9 @@ dependencies = [
 
 [[package]]
 name = "lbug"
-version = "0.21.2"
+version = "0.22.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "862a51324bf4785f3f1e4dca9b86d38745b543c0f06b1a5731956e66979879c3"
+checksum = "ba8edc9b2a2efaed69ae879971a7d9690e771b10492b6a4082aeea88acf3c84b"
 dependencies = [
  "arrow 55.2.0",
  "cmake",
diff --git a/Cargo.toml b/Cargo.toml
index 2d83f3d..eebd32d 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -9,9 +9,9 @@ icebug-analytics = ["dep:icebug"]
 
 [dependencies]
 gpui = "0.2"
-lbug = { version = "0.21.2", features = ["arrow"] }
+lbug = { version = "0.22.0", features = ["arrow"] }
 icebug = { version = "=13.2.0", optional = true }
-# Pinned to 55 to match lbug's `arrow` (0.21.x uses arrow 55): lbug hands us
+# Pinned to 55 to match lbug's `arrow` (0.21.x/0.22.x use arrow 55): lbug hands us
 # Arrow batches built with its own arrow, so our decode types must be the
 # same crate version or every `downcast_ref` silently yields nothing.
 arrow = { version = "55", default-features = false, features = ["ffi", "prettyprint"] }
diff --git a/scripts/download_icebug.sh b/scripts/download_icebug.sh
index e13e62f..6ab1977 100755
--- a/scripts/download_icebug.sh
+++ b/scripts/download_icebug.sh
@@ -12,11 +12,17 @@ PROJECT_DIR="$(cd "$SCRIPT_DIR/.." && pwd)"
 
 REPOSITORY="${ICEBUG_GITHUB_REPOSITORY:-Ladybug-Memory/icebug}"
 TARGET_DIR="${ICEBUG_TARGET_DIR:-$PROJECT_DIR/icebug}"
-VERSION="${ICEBUG_VERSION:-13.4}"
 
 OS="$(uname -s)"
 ARCH="$(uname -m)"
 
+# 13.5 pairs with the served 0.22.0 algo extension (its GDS entry points
+# need NetworKit symbols added after 13.2). The macOS/Windows 13.5 builds
+# link libarrow.2500, so the Arrow 25 setup there is unchanged; the Linux
+# 13.5 build links libarrow.so.2600 (a release-pipeline mistake upstream,
+# hence the Arrow 26 apt pin in CI). Overridable per run via ICEBUG_VERSION.
+VERSION="${ICEBUG_VERSION:-13.5}"
+
 case "$OS" in
   Darwin)
     ASSET_OS="macos"