Remove the unstable encodings feature

.github/workflows/ci.yml

@@ -578,21 +578,15 @@ jobs:
       - uses: ./.github/actions/setup-prebuild
         with:
           enable-sccache: "true"
-      # The golden suite pins the compressor's decisions per feature variant, and the
-      # variants are mutually exclusive at compile time: the `default` variant only exists
-      # without `unstable_encodings` (which changes ALL_SCHEMES), so the `--all-features`
-      # workspace test jobs cannot run it. Run each feature combination explicitly.
-      - name: Golden corpus (default features)
+      # The golden suite pins compressor decisions for the core-only and explicitly enabled
+      # edition configurations. Compact compression additionally needs its optional schemes.
+      - name: Golden corpus (edition configurations)
         run: |
           cargo nextest run --cargo-profile ci --locked --no-fail-fast -p vortex-btrblocks --test golden
-      - name: Golden corpus (unstable_encodings)
+      - name: Golden corpus (compact, zstd + pco)
         run: |
           cargo nextest run --cargo-profile ci --locked --no-fail-fast -p vortex-btrblocks --test golden \
-            --features unstable_encodings
-      - name: Golden corpus (compact, unstable_encodings + zstd + pco)
-        run: |
-          cargo nextest run --cargo-profile ci --locked --no-fail-fast -p vortex-btrblocks --test golden \
-            --features unstable_encodings,zstd,pco
+            --features zstd,pco -E 'test(golden_compact)'
 
   build-java:
     name: "Java"

.github/workflows/develop-bench.yml

@@ -62,7 +62,7 @@ jobs:
         env:
           RUSTFLAGS: "-C target-cpu=native -C force-frame-pointers=yes"
         run: |
-          cargo build --bin ${{ matrix.benchmark.id }} --profile release_debug ${{ matrix.benchmark.build_args }} --features unstable_encodings
+          cargo build --bin ${{ matrix.benchmark.id }} --profile release_debug ${{ matrix.benchmark.build_args }}
       - name: Pre-upload benchmark debuginfo to Polar Signals
         uses: ./.github/actions/upload-parca-debuginfo
         continue-on-error: true
@@ -143,7 +143,6 @@ jobs:
         shell: bash
         env:
           RUST_BACKTRACE: full
-          VORTEX_EXPERIMENTAL_PATCHED_ARRAY: "1"
           FLAT_LAYOUT_INLINE_ARRAY_NODE: "1"
         run: |
           python3 scripts/random-access-split.py --emit-ingest-records
@@ -153,7 +152,6 @@ jobs:
         shell: bash
         env:
           RUST_BACKTRACE: full
-          VORTEX_EXPERIMENTAL_PATCHED_ARRAY: "1"
           FLAT_LAYOUT_INLINE_ARRAY_NODE: "1"
         run: |
           python3 scripts/compress-split.py --formats arrow-ipc,parquet,lance,vortex --emit-ingest-records
@@ -163,7 +161,6 @@ jobs:
         shell: bash
         env:
           RUST_BACKTRACE: full
-          VORTEX_EXPERIMENTAL_PATCHED_ARRAY: "1"
           FLAT_LAYOUT_INLINE_ARRAY_NODE: "1"
         run: |
           python3 scripts/string-split.py

.github/workflows/fuzz.yml

@@ -101,46 +101,6 @@ jobs:
       gh_token: ${{ secrets.GITHUB_TOKEN }}
       incident_io_alert_token: ${{ secrets.INCIDENT_IO_ALERT_TOKEN }}
 
-  # ============================================================================
-  # Array Operations Fuzzer (unstable encodings)
-  # ============================================================================
-  ops_fuzz_unstable:
-    name: "Array Operations Fuzz (unstable)"
-    uses: ./.github/workflows/run-fuzzer.yml
-    with:
-      fuzz_target: array_ops
-      fuzz_name: array_ops_unstable_encodings
-      extra_features: "vortex/unstable_encodings"
-      extra_env: "VORTEX_EXPERIMENTAL_PATCHED_ARRAY=1"
-      jobs: 4
-    secrets:
-      R2_FUZZ_ACCESS_KEY_ID: ${{ secrets.R2_FUZZ_ACCESS_KEY_ID }}
-      R2_FUZZ_SECRET_ACCESS_KEY: ${{ secrets.R2_FUZZ_SECRET_ACCESS_KEY }}
-
-  report-ops-unstable-fuzz-failures:
-    name: "Report Array Ops (unstable) Fuzz Failures"
-    needs: ops_fuzz_unstable
-    if: always() && needs.ops_fuzz_unstable.outputs.crashes_found == 'true'
-    permissions:
-      issues: write
-      contents: read
-      id-token: write
-      pull-requests: read
-    uses: ./.github/workflows/report-fuzz-crash.yml
-    with:
-      fuzz_target: array_ops
-      fuzz_name: array_ops_unstable_encodings
-      crash_file: ${{ needs.ops_fuzz_unstable.outputs.first_crash_name }}
-      artifact_url: ${{ needs.ops_fuzz_unstable.outputs.artifact_url }}
-      artifact_name: array_ops_unstable_encodings-crash-artifacts
-      logs_artifact_name: array_ops_unstable_encodings-logs
-      branch: ${{ github.ref_name }}
-      commit: ${{ github.sha }}
-    secrets:
-      claude_code_oauth_token: ${{ secrets.CLAUDE_CODE_OAUTH_TOKEN }}
-      gh_token: ${{ secrets.GITHUB_TOKEN }}
-      incident_io_alert_token: ${{ secrets.INCIDENT_IO_ALERT_TOKEN }}
-
   # ============================================================================
   # FSST LIKE Fuzzer
   # ============================================================================

.github/workflows/pr-bench-gpu-compress.yml

@@ -63,7 +63,7 @@ jobs:
       - name: Build GPU compression benchmark
         shell: bash
         run: |
-          cargo build --locked --package compress-bench --profile release_debug --features cuda,unstable_encodings
+          cargo build --locked --package compress-bench --profile release_debug --features cuda
       - name: Setup benchmark environment
         run: sudo bash scripts/setup-benchmark.sh
       - name: Run GPU compression benchmark

.github/workflows/pr-bench-runner.yml

@@ -53,7 +53,7 @@ jobs:
           RUSTFLAGS: "-C target-cpu=native -C force-frame-pointers=yes"
         run: |
           cargo build --package ${{ inputs.benchmark_id }} --profile release_debug \
-            --features ${{ inputs.with_lance && 'lance,' || '' }}unstable_encodings
+            ${{ inputs.with_lance && '--features lance' || '' }}
       - name: Pre-upload benchmark debuginfo to Polar Signals
         if: github.event.pull_request.head.repo.fork == false
         uses: ./.github/actions/upload-parca-debuginfo
@@ -130,7 +130,6 @@ jobs:
         shell: bash
         env:
           RUST_BACKTRACE: full
-          VORTEX_EXPERIMENTAL_PATCHED_ARRAY: "1"
           FLAT_LAYOUT_INLINE_ARRAY_NODE: "1"
         run: |
           python3 scripts/random-access-split.py
@@ -140,7 +139,6 @@ jobs:
         shell: bash
         env:
           RUST_BACKTRACE: full
-          VORTEX_EXPERIMENTAL_PATCHED_ARRAY: "1"
           FLAT_LAYOUT_INLINE_ARRAY_NODE: "1"
         run: |
           python3 scripts/compress-split.py
@@ -150,7 +148,6 @@ jobs:
         shell: bash
         env:
           RUST_BACKTRACE: full
-          VORTEX_EXPERIMENTAL_PATCHED_ARRAY: "1"
           FLAT_LAYOUT_INLINE_ARRAY_NODE: "1"
         run: |
           python3 scripts/string-split.py

.github/workflows/sql-bench-matrix.yml

@@ -46,7 +46,6 @@ jobs:
   build:
     timeout-minutes: 60
     env:
-      VORTEX_EXPERIMENTAL_PATCHED_ARRAY: "1"
       FLAT_LAYOUT_INLINE_ARRAY_NODE: "1"
     runs-on: >-
       ${{ github.repository == 'vortex-data/vortex'
@@ -73,7 +72,7 @@ jobs:
           if [ "${{ inputs.mode }}" != "pr" ]; then
             packages+=(--bin lance-bench)
           fi
-          cargo build "${packages[@]}" --profile release_debug --features unstable_encodings
+          cargo build "${packages[@]}" --profile release_debug
       - parallel:
           - name: Upload binaries
             uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a  # v7
@@ -101,7 +100,6 @@ jobs:
     needs: [resolve-matrix, build]
     timeout-minutes: 120
     env:
-      VORTEX_EXPERIMENTAL_PATCHED_ARRAY: "1"
       FLAT_LAYOUT_INLINE_ARRAY_NODE: "1"
       # Makes python output nicer
       COLUMNS: 120

bench-orchestrator/README.md

@@ -364,6 +364,6 @@ Benchmarks are built with:
 
 - Profile: `release_debug`
 - RUSTFLAGS: `-C target-cpu=native -C force-frame-pointers=yes`
-- Features: `unstable_encodings`
+- Features: none
 
 This enables native CPU optimizations while preserving debug symbols for profiling.

bench-orchestrator/bench_orchestrator/config.py

@@ -282,7 +282,7 @@ class BuildConfig:
 
     profile: str = "release_debug"
     rustflags: str = "-C target-cpu=native -C force-frame-pointers=yes"
-    features: tuple[str, ...] = ("unstable_encodings",)
+    features: tuple[str, ...] = ()
 
 
 def get_workspace_root() -> Path:

benchmarks/compress-bench/Cargo.toml

@@ -41,11 +41,6 @@ vortex-cuda = { workspace = true, optional = true }
 [features]
 cuda = ["dep:tempfile", "dep:vortex-cuda"]
 lance = ["dep:lance-bench"]
-unstable_encodings = [
-    "vortex/unstable_encodings",
-    "vortex-bench/unstable_encodings",
-    "vortex-cuda?/unstable_encodings",
-]
 
 [[bin]]
 name = "compress-bench"

benchmarks/compress-bench/README.md

@@ -41,11 +41,11 @@ Both sides therefore decode all the way to device-resident arrays, which is what
 
 ```bash
 cargo run -p compress-bench --profile release_debug \
-  --features cuda,unstable_encodings -- --gpu-decompress
+  --features cuda -- --gpu-decompress
 
 # pick the Parquet page codec the GPU file is written with (default: snappy)
 cargo run -p compress-bench --profile release_debug \
-  --features cuda,unstable_encodings -- --gpu-decompress --gpu-parquet-codec zstd
+  --features cuda -- --gpu-decompress --gpu-parquet-codec zstd
 ```
 
 ### cuDF
@@ -116,7 +116,7 @@ still publishes comparable numbers — it just takes considerably longer:
 
 ```bash
 cargo run -p compress-bench --profile release_debug \
-  --features cuda,unstable_encodings -- --gpu-decompress --gpu-verify --iterations 1
+  --features cuda -- --gpu-decompress --gpu-verify --iterations 1
 ```
 
 Any `--gpu-decompress` run reports on every dataset rather than stopping at the first failure, so

benchmarks/compress-bench/src/gpu/vortex.rs

@@ -32,12 +32,12 @@ use vortex::layout::scan::split_by::SplitBy;
 use vortex_arrow::ArrowSessionExt;
 use vortex_bench::Format;
 use vortex_bench::SESSION;
-use vortex_bench::benchmark_write_options;
 use vortex_bench::compress::Compressed;
 use vortex_bench::compress::CompressedData;
 use vortex_bench::compress::Compressor;
 use vortex_bench::compress::Uncompressed;
 use vortex_bench::conversions::parquet_to_vortex_chunks_with_batch_size;
+use vortex_bench::retain_edition_encodings;
 use vortex_cuda::CanonicalCudaExt;
 use vortex_cuda::CudaExecutionCtx;
 use vortex_cuda::CudaOpenOptionsExt;
@@ -100,12 +100,15 @@ impl Compressor for GpuVortexCompressor {
         // partition rather than whatever the default strategy would regroup them into.
         let strategy = Arc::new(ChunkedLayoutStrategy::new(CompressingStrategy::new(
             CudaFlatLayoutStrategy::default(),
-            BtrBlocksCompressorBuilder::default()
-                .only_cuda_compatible()
-                .build(),
+            retain_edition_encodings(
+                &SESSION,
+                BtrBlocksCompressorBuilder::default().only_cuda_compatible(),
+            )
+            .build(),
         )));
         let start = Instant::now();
-        benchmark_write_options(SESSION.write_options())
+        SESSION
+            .write_options()
             .with_strategy(strategy)
             .write(&mut output, array.to_array_stream())
             .await?;

benchmarks/compress-bench/src/vortex.rs

@@ -22,7 +22,6 @@ use vortex::file::WriteOptionsSessionExt;
 use vortex_arrow::ArrowSessionExt;
 use vortex_bench::Format;
 use vortex_bench::SESSION;
-use vortex_bench::benchmark_write_options;
 use vortex_bench::compress::Compressed;
 use vortex_bench::compress::CompressedData;
 use vortex_bench::compress::Compressor;
@@ -50,7 +49,8 @@ impl Compressor for VortexCompressor {
         let mut buf = Vec::new();
         let start = Instant::now();
         let mut cursor = Cursor::new(&mut buf);
-        benchmark_write_options(SESSION.write_options())
+        SESSION
+            .write_options()
             .write(&mut cursor, array.to_array_stream())
             .await?;
         let elapsed = start.elapsed();

benchmarks/datafusion-bench/Cargo.toml

@@ -58,7 +58,6 @@ custom-labels = { workspace = true }
 
 [features]
 cuda = ["dep:vortex-cuda"]
-unstable_encodings = ["vortex/unstable_encodings", "vortex-bench/unstable_encodings"]
 
 [lints]
 workspace = true

benchmarks/duckdb-bench/Cargo.toml

@@ -37,7 +37,6 @@ vortex-duckdb = { workspace = true }
 
 [features]
 cuda = ["dep:vortex-cuda"]
-unstable_encodings = ["vortex/unstable_encodings", "vortex-bench/unstable_encodings"]
 
 [lints]
 workspace = true

benchmarks/lance-bench/Cargo.toml

@@ -30,9 +30,6 @@ tokio = { workspace = true, features = ["full"] }
 tracing = { workspace = true }
 vortex-bench = { workspace = true }
 
-[features]
-unstable_encodings = ["vortex-bench/unstable_encodings"]
-
 [lib]
 test = false
 

benchmarks/random-access-bench/Cargo.toml

@@ -27,7 +27,6 @@ vortex-bench = { workspace = true }
 
 [features]
 lance = ["dep:lance-bench"]
-unstable_encodings = ["vortex-bench/unstable_encodings"]
 
 [[bin]]
 name = "random-access-bench"

benchmarks/string-bench/Cargo.toml

@@ -32,16 +32,8 @@ vortex-btrblocks = { workspace = true }
 vortex-fsst = { workspace = true }
 vortex-onpair = { workspace = true }
 
-[features]
-unstable_encodings = [
-    "vortex/unstable_encodings",
-    "vortex-bench/unstable_encodings",
-    "vortex-btrblocks/unstable_encodings",
-]
-
 [[bin]]
 name = "string-bench"
-required-features = ["unstable_encodings"]
 
 [lints]
 workspace = true

benchmarks/string-bench/README.md

@@ -80,22 +80,22 @@ Input preparation is outside benchmark timing.
 
 ```bash
 # Tracked metrics: size, write, read for every configured column and encoder.
-cargo run -p string-bench --profile release_debug --features unstable_encodings
+cargo run -p string-bench --profile release_debug
 
 # Focus on selected columns or encoders.
-cargo run -p string-bench --profile release_debug --features unstable_encodings -- \
+cargo run -p string-bench --profile release_debug -- \
   --columns URL --encoders onpair
 
 # Add the direct codec microbenchmark.
-cargo run -p string-bench --profile release_debug --features unstable_encodings -- \
+cargo run -p string-bench --profile release_debug -- \
   --suite both
 
 # Emit benchmark-comparator JSONL.
-cargo run -p string-bench --profile release_debug --features unstable_encodings -- \
+cargo run -p string-bench --profile release_debug -- \
   --display-format gh-json --output-path results.json
 ```
 
-Run `cargo run -p string-bench --features unstable_encodings -- --help` for all
+Run `cargo run -p string-bench -- --help` for all
 filters and tuning options.
 
 Before timing, the benchmark checks that each requested encoding was produced

benchmarks/string-bench/src/lib.rs

@@ -1,8 +1,6 @@
 // SPDX-License-Identifier: Apache-2.0
 // SPDX-FileCopyrightText: Copyright the Vortex contributors
 
-#![cfg(feature = "unstable_encodings")]
-
 //! String-compression benchmarks for Vortex.
 //!
 //! Two intentionally separate suites: