diff --git a/.dockerignore b/.dockerignore
index e680f30..3c9fa69 100644
--- a/.dockerignore
+++ b/.dockerignore
@@ -3,4 +3,4 @@ build
 tmp
 .env
 .git
-tools/edge-bench-rs/target
+edge/target
diff --git a/.gitea/workflows/deploy.yaml b/.gitea/workflows/deploy.yaml
index 6c8ad7b..627f112 100644
--- a/.gitea/workflows/deploy.yaml
+++ b/.gitea/workflows/deploy.yaml
@@ -66,8 +66,28 @@ jobs:
       - name: Test
         run: node ace test
 
+  # The edge worker (edge/, Rust): its tests, and the Rust and TypeScript
+  # RangeIndexers compared on the committed captures (edge/fixtures).
+  edge:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
+        with:
+          node-version-file: .nvmrc
+          cache: npm
+      - run: npm ci
+      - name: Rust toolchain
+        run: |
+          command -v cargo || curl -sSf https://sh.rustup.rs | sh -s -- -y --profile minimal
+          echo "$HOME/.cargo/bin" >> "$GITHUB_PATH"
+      - name: cargo test
+        run: cargo test --release --manifest-path edge/Cargo.toml
+      - name: Rust and TypeScript identical on the fixtures
+        run: edge/check-fixtures.sh
+
   deploy:
-    needs: test
+    needs: [test, edge]
     if: github.ref == 'refs/heads/rebuild'
     runs-on: ubuntu-latest
     steps:
diff --git a/Dockerfile b/Dockerfile
index 7448349..e3e5859 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -2,7 +2,7 @@
 #
 # Voyager 2's images (deploy/compose.yaml):
 #   --target app   the AdonisJS app: web server, coordinator, migrations, ace commands
-#   --target edge  the Rust edge worker (tools/edge-bench-rs, bin edge-node)
+#   --target edge  the Rust edge worker (edge/, bin edge-node)
 
 # Node is pinned as in CI (.nvmrc): on 24.21, jsonschema 1.5.0 (used by Ace to
 # validate commands) throws "Invalid URL" on $ref, so no ace command starts.
@@ -29,7 +29,7 @@ CMD ["node", "ace", "list"]
 # The Rust worker. Registry and target dir are build caches, so a rebuild only compiles what changed.
 FROM rust:1-bookworm AS edge-build
 WORKDIR /src
-COPY tools/edge-bench-rs ./
+COPY edge ./
 RUN --mount=type=cache,target=/usr/local/cargo/registry \
     --mount=type=cache,target=/src/target \
     cargo build --release --locked --bin edge-node \
diff --git a/REBUILD.md b/REBUILD.md
index 6415663..0bf6c1f 100644
--- a/REBUILD.md
+++ b/REBUILD.md
@@ -119,7 +119,7 @@ dropping garbage; 28 TB of compressed overview traffic. Throughput goal:
 2. **Edge worker** (node, TypeScript reusing `lib/`). Measured (`edge:bench`,
    2026-10-09, after two rounds of work): ~200–215 k headers/s per core on
    recent a.b.boneless, ~320–340 k on a 2013 a.b.ath range, ~0.7 GB peak
-   per process. **Rust** (`tools/edge-bench-rs`, the same RangeIndexer path
+   per process. **Rust** (`edge/`, the same RangeIndexer path
    over the same captures; `check.ts` finds every output identical, the
    decoded payloads included): 3.5–3.8× less CPU (boneless 2.9 vs 11.1
    CPU-s per 2 M headers, ath 2.15 vs 7.5) and a third of the memory
@@ -130,7 +130,7 @@ dropping garbage; 28 TB of compressed overview traffic. Throughput goal:
    cost: a second implementation of lib/headers, lib/release, lib/rules and
    the chunk format, kept identical (check.ts) for as long as both exist.
    Findings, how to run both and how to compare their outputs:
-   `tools/edge-bench-rs/README.md`. Since 2026-10-09 the Rust worker
+   `edge/README.md`. Since 2026-10-09 the Rust worker
    (`edge-node`, same crate) is the one running on homelab: ~8× less CPU
    per header and 20× less memory than `edge:node` in production.
    Per lease: compressed chunks of 10–50 k lines, in order →
diff --git a/tools/edge-bench-rs/.gitignore b/edge/.gitignore
similarity index 100%
rename from tools/edge-bench-rs/.gitignore
rename to edge/.gitignore
diff --git a/tools/edge-bench-rs/Cargo.lock b/edge/Cargo.lock
similarity index 99%
rename from tools/edge-bench-rs/Cargo.lock
rename to edge/Cargo.lock
index 93df9e0..d56c87d 100644
--- a/tools/edge-bench-rs/Cargo.lock
+++ b/edge/Cargo.lock
@@ -141,7 +141,7 @@ dependencies = [
 ]
 
 [[package]]
-name = "edge-bench-rs"
+name = "edge"
 version = "0.1.0"
 dependencies = [
  "base64 0.22.1",
diff --git a/tools/edge-bench-rs/Cargo.toml b/edge/Cargo.toml
similarity index 63%
rename from tools/edge-bench-rs/Cargo.toml
rename to edge/Cargo.toml
index ea31165..54c3e53 100644
--- a/tools/edge-bench-rs/Cargo.toml
+++ b/edge/Cargo.toml
@@ -1,8 +1,16 @@
 [package]
-name = "edge-bench-rs"
+name = "edge"
 version = "0.1.0"
 edition = "2021"
-description = "The edge worker's indexing (lib/edge RangeIndexer) in Rust, to compare with edge:bench on captured ranges"
+description = "Voyager 2's edge worker (edge-node) and its benchmark (edge-bench): the RangeIndexer in Rust, kept identical to lib/edge (check.ts)"
+
+[[bin]]
+name = "edge-bench"
+path = "src/main.rs"
+
+[[bin]]
+name = "edge-node"
+path = "src/bin/edge-node.rs"
 
 [dependencies]
 base64 = "0.22"
diff --git a/tools/edge-bench-rs/README.md b/edge/README.md
similarity index 81%
rename from tools/edge-bench-rs/README.md
rename to edge/README.md
index 8ec00c5..06e4de2 100644
--- a/tools/edge-bench-rs/README.md
+++ b/edge/README.md
@@ -1,36 +1,40 @@
-# edge-bench-rs: the edge worker's indexing in Rust
+# edge: voyager 2's edge worker (Rust)
 
-Since 2026-10-09 this crate is also the production worker: `edge-node`
-(`src/bin/edge-node.rs`) leases ranges from the coordinator and posts
-batches like `node ace edge:node`, with the same indexing as the
-benchmark (`src/lib.rs`). On homelab it indexed 122M headers in 10
-minutes with 0.37 cores and 565 MB, next to the TypeScript workers' 24M
-with 0.61 cores and 11.3 GB (8 threads vs 8 processes): about 8× less
-CPU per header and 20× less memory. See "The worker" below.
+The product: `edge-node` (`src/bin/edge-node.rs`) is the worker that runs
+on homelab (compose service `edge`, image target `edge`). It leases ranges
+from the node API, reads their prefetched XOVER chunks, finds releases and
+posts batches. `edge-bench` (`src/main.rs`) replays a captured range through
+the same indexing (`src/lib.rs`) for timing and for comparing.
 
-A measurement, not a product. It answers whether a Rust edge worker would be
-worth a second implementation of the TypeScript one (`edge:node`, REBUILD.md
-part 2). It ports the path that `edge:bench` replays over a captured range:
+The TypeScript `RangeIndexer` (`lib/edge`, `node ace edge:node`) is the
+reference: `check.ts` runs both on a capture and compares every output field
+by field. An identity or rule change goes into both and has to come out
+identical. CI (`.gitea/workflows/deploy.yaml`, job `edge`) runs `cargo test`
+and `check-fixtures.sh`, which compares both on the committed captures in
+`fixtures/` (25k overview lines each of a.b.models, a.b.ath and
+a.b.boneless, in 5 chunks); a push to `rebuild` deploys only when they
+match.
 
-- inflate each XOVER chunk;
-- scan the overview lines (no object per line);
-- apply the owner rule from the Xref;
-- build segments (file key, release identity);
-- aggregate segments into files, and cut off idle ones as fragments,
-  per-article or incomplete files;
-- every N chunks, judge the completed releases (rules: executables,
-  readable names, garbage tools and signatures, per-article random
-  subjects), encode their chunks (format v2) and pick probe candidates.
+```sh
+cargo test --release --manifest-path edge/Cargo.toml
+edge/check-fixtures.sh                       # from the repository root
+```
 
-It does not port NNTP, the coordinator API, batch posting or anything on the
-server side.
+In production since 2026-10-09: 122M headers in 10 minutes with 0.37 cores
+and 565 MB, next to the TypeScript workers' 24M with 0.61 cores and 11.3 GB
+(8 threads vs 8 processes): about 8× less CPU per header and 20× less
+memory. See "The worker" below.
+
+It started as a measurement (moved from `tools/edge-bench-rs` on
+2026-10-11): whether a Rust worker would be worth a second implementation.
+The findings below are from then.
 
 ## Findings (2026-10-09)
 
 Same machine (the workstation, otherwise idle), same captures, 2M headers
 each:
 
-| Capture | TypeScript (`edge:bench`) | Rust (`edge-bench-rs`) | Less CPU |
+| Capture | TypeScript (`edge:bench`) | Rust (`edge-bench`) | Less CPU |
 |---|---|---|---|
 | a.b.boneless 2026 (160950000000–160951999999) | 11.1 CPU-s (~215k headers/s), 0.70 GB peak | 2.9 CPU-s (~690k/s), 0.24 GB | 3.8× |
 | a.b.boneless 2026 (160952000000–160953999999) | 11.8 CPU-s (~205k/s), 0.70 GB | 3.1 CPU-s (~640k/s), 0.24 GB | 3.8× |
@@ -92,8 +96,8 @@ Benchmark both on it:
 
 ```sh
 node ace edge:bench --dir /path/to/capture        # TypeScript: headers/s, CPU, inflate/index, peak RSS
-cd tools/edge-bench-rs && cargo build --release
-./target/release/edge-bench-rs /path/to/capture   # Rust: the same summary
+cd edge && cargo build --release
+./target/release/edge-bench /path/to/capture   # Rust: the same summary
 ```
 
 Both take results every 10 chunks (`--batch-chunks`) and give a file up after
@@ -109,8 +113,8 @@ themselves.
 ## Comparing the output
 
 ```sh
-./target/release/edge-bench-rs /path/to/capture --dump /tmp/out.jsonl
-cd ../.. && node --import=@poppinss/ts-exec tools/edge-bench-rs/check.ts /path/to/capture /tmp/out.jsonl
+./target/release/edge-bench /path/to/capture --dump /tmp/out.jsonl
+cd .. && node --import=@poppinss/ts-exec edge/check.ts /path/to/capture /tmp/out.jsonl
 ```
 
 `--dump` writes every output of every batch as JSON lines:
@@ -223,12 +227,12 @@ COORDINATOR_URL=http://coordinator:3334 NODE_TOKEN=… ./target/release/edge-nod
   node's download cap, shared by its threads. Plus a heartbeat when no
   batch went out for a minute.
 - **Wire format:** `src/wire.rs` writes a batch as `toWire` does.
-  `edge-bench-rs --wire` and `check.ts --wire` compare it with the
+  `edge-bench --wire` and `check.ts --wire` compare it with the
   TypeScript's, field by field.
 - **End to end:** both workers indexed the a.b.models capture (spooled
   as a range) through the web server; what the server stored was the
   same (releases with every column, chunks, candidates, rule counts,
   fragments with their JSON).
-- **On homelab:** container `usenet-rebuild-edge-rs` runs
-  `/mnt/bulk/usenet-rebuild/bin/edge-node --threads 8` in
-  node:22-bookworm-slim (the binary needs glibc 2.34+).
+- **On homelab:** compose service `edge` (deploy/compose.yaml), the
+  `edge` image target of the Dockerfile, `--threads $EDGE_THREADS` (8);
+  it talks to `node-api`.
diff --git a/edge/check-fixtures.sh b/edge/check-fixtures.sh
new file mode 100755
index 0000000..5bf4193
--- /dev/null
+++ b/edge/check-fixtures.sh
@@ -0,0 +1,18 @@
+#!/bin/sh
+# The Rust and TypeScript RangeIndexers on the committed captures (edge/fixtures: 25k
+# overview lines each of a.b.models, a.b.ath and a.b.boneless, in 5 chunks), compared
+# by check.ts field by field: exits non-zero on any difference. CI runs it; run it from
+# the repository root after any change to either side.
+set -eu
+cd "$(dirname "$0")/.."
+cargo build --release --quiet --manifest-path edge/Cargo.toml --bin edge-bench
+out=$(mktemp -d)
+trap 'rm -rf "$out"' EXIT
+status=0
+for capture in edge/fixtures/*/; do
+  name=$(basename "$capture")
+  edge/target/release/edge-bench "$capture" --batch-chunks 2 --idle 2 --dump "$out/$name.jsonl" --wire "$out/$name.wire.jsonl" >/dev/null 2>&1
+  echo "== $name"
+  node --import=@poppinss/ts-exec edge/check.ts "$capture" "$out/$name.jsonl" --wire "$out/$name.wire.jsonl" --batch-chunks 2 --idle 2 || status=1
+done
+exit $status
diff --git a/tools/edge-bench-rs/check.ts b/edge/check.ts
similarity index 96%
rename from tools/edge-bench-rs/check.ts
rename to edge/check.ts
index 45fb705..8919a5f 100644
--- a/tools/edge-bench-rs/check.ts
+++ b/edge/check.ts
@@ -1,12 +1,12 @@
 /**
- * Compares edge-bench-rs's output (--dump) with the TypeScript RangeIndexer
+ * Compares edge-bench's output (--dump) with the TypeScript RangeIndexer
  * on the same captured range, item by item: releases (every field, and the
  * payload decoded with lib/chunks), samples, probe candidates, rule counts,
  * fragments and batch boundaries.
  *
- *   node --import=@poppinss/ts-exec tools/edge-bench-rs/check.ts <dir> <dump.jsonl> [--wire batches.jsonl] [--batch-chunks 10] [--idle 5]
+ *   node --import=@poppinss/ts-exec edge/check.ts <dir> <dump.jsonl> [--wire batches.jsonl] [--batch-chunks 10] [--idle 5]
  *
- * With --wire (edge-bench-rs --wire): also each batch as the Rust worker
+ * With --wire (edge-bench --wire): also each batch as the Rust worker
  * posts it, against toWire of the TypeScript batch, field by field.
  */
 import { readFile, readdir } from 'node:fs/promises'
diff --git a/edge/fixtures/ath-2013/0000-2549992990-2549997989.gz b/edge/fixtures/ath-2013/0000-2549992990-2549997989.gz
new file mode 100644
index 0000000..2642e51
Binary files /dev/null and b/edge/fixtures/ath-2013/0000-2549992990-2549997989.gz differ
diff --git a/edge/fixtures/ath-2013/0001-2549997990-2550002989.gz b/edge/fixtures/ath-2013/0001-2549997990-2550002989.gz
new file mode 100644
index 0000000..011dcbf
Binary files /dev/null and b/edge/fixtures/ath-2013/0001-2549997990-2550002989.gz differ
diff --git a/edge/fixtures/ath-2013/0002-2550002990-2550007989.gz b/edge/fixtures/ath-2013/0002-2550002990-2550007989.gz
new file mode 100644
index 0000000..4ebb1e5
Binary files /dev/null and b/edge/fixtures/ath-2013/0002-2550002990-2550007989.gz differ
diff --git a/edge/fixtures/ath-2013/0003-2550007990-2550012989.gz b/edge/fixtures/ath-2013/0003-2550007990-2550012989.gz
new file mode 100644
index 0000000..e583dfa
Binary files /dev/null and b/edge/fixtures/ath-2013/0003-2550007990-2550012989.gz differ
diff --git a/edge/fixtures/ath-2013/0004-2550012990-2550017989.gz b/edge/fixtures/ath-2013/0004-2550012990-2550017989.gz
new file mode 100644
index 0000000..2e01d96
Binary files /dev/null and b/edge/fixtures/ath-2013/0004-2550012990-2550017989.gz differ
diff --git a/edge/fixtures/ath-2013/range.json b/edge/fixtures/ath-2013/range.json
new file mode 100644
index 0000000..0a4290d
--- /dev/null
+++ b/edge/fixtures/ath-2013/range.json
@@ -0,0 +1 @@
+{"group":"alt.binaries.ath","start":2549992990,"end":2550017989}
\ No newline at end of file
diff --git a/edge/fixtures/boneless-2026/0000-160950000000-160950004999.gz b/edge/fixtures/boneless-2026/0000-160950000000-160950004999.gz
new file mode 100644
index 0000000..e0bd3c7
Binary files /dev/null and b/edge/fixtures/boneless-2026/0000-160950000000-160950004999.gz differ
diff --git a/edge/fixtures/boneless-2026/0001-160950005000-160950009999.gz b/edge/fixtures/boneless-2026/0001-160950005000-160950009999.gz
new file mode 100644
index 0000000..77a4e9c
Binary files /dev/null and b/edge/fixtures/boneless-2026/0001-160950005000-160950009999.gz differ
diff --git a/edge/fixtures/boneless-2026/0002-160950010000-160950014999.gz b/edge/fixtures/boneless-2026/0002-160950010000-160950014999.gz
new file mode 100644
index 0000000..eb511cc
Binary files /dev/null and b/edge/fixtures/boneless-2026/0002-160950010000-160950014999.gz differ
diff --git a/edge/fixtures/boneless-2026/0003-160950015000-160950019999.gz b/edge/fixtures/boneless-2026/0003-160950015000-160950019999.gz
new file mode 100644
index 0000000..4dad040
Binary files /dev/null and b/edge/fixtures/boneless-2026/0003-160950015000-160950019999.gz differ
diff --git a/edge/fixtures/boneless-2026/0004-160950020000-160950024999.gz b/edge/fixtures/boneless-2026/0004-160950020000-160950024999.gz
new file mode 100644
index 0000000..aa9d78d
Binary files /dev/null and b/edge/fixtures/boneless-2026/0004-160950020000-160950024999.gz differ
diff --git a/edge/fixtures/boneless-2026/range.json b/edge/fixtures/boneless-2026/range.json
new file mode 100644
index 0000000..0945214
--- /dev/null
+++ b/edge/fixtures/boneless-2026/range.json
@@ -0,0 +1 @@
+{"group":"alt.binaries.boneless","start":160950000000,"end":160950024999}
\ No newline at end of file
diff --git a/edge/fixtures/models-a/0000-2017215-2022214.gz b/edge/fixtures/models-a/0000-2017215-2022214.gz
new file mode 100644
index 0000000..5a912d2
Binary files /dev/null and b/edge/fixtures/models-a/0000-2017215-2022214.gz differ
diff --git a/edge/fixtures/models-a/0001-2022215-2027214.gz b/edge/fixtures/models-a/0001-2022215-2027214.gz
new file mode 100644
index 0000000..66a20e3
Binary files /dev/null and b/edge/fixtures/models-a/0001-2022215-2027214.gz differ
diff --git a/edge/fixtures/models-a/0002-2027215-2032214.gz b/edge/fixtures/models-a/0002-2027215-2032214.gz
new file mode 100644
index 0000000..64bb98c
Binary files /dev/null and b/edge/fixtures/models-a/0002-2027215-2032214.gz differ
diff --git a/edge/fixtures/models-a/0003-2032215-2037214.gz b/edge/fixtures/models-a/0003-2032215-2037214.gz
new file mode 100644
index 0000000..60fa2d3
Binary files /dev/null and b/edge/fixtures/models-a/0003-2032215-2037214.gz differ
diff --git a/edge/fixtures/models-a/0004-2037215-2042214.gz b/edge/fixtures/models-a/0004-2037215-2042214.gz
new file mode 100644
index 0000000..7b842ce
Binary files /dev/null and b/edge/fixtures/models-a/0004-2037215-2042214.gz differ
diff --git a/edge/fixtures/models-a/range.json b/edge/fixtures/models-a/range.json
new file mode 100644
index 0000000..d796b7a
--- /dev/null
+++ b/edge/fixtures/models-a/range.json
@@ -0,0 +1 @@
+{"group":"alt.binaries.models","start":2017215,"end":2042214}
\ No newline at end of file
diff --git a/tools/edge-bench-rs/src/bin/edge-node.rs b/edge/src/bin/edge-node.rs
similarity index 99%
rename from tools/edge-bench-rs/src/bin/edge-node.rs
rename to edge/src/bin/edge-node.rs
index 5c7b3b0..915ac7a 100644
--- a/tools/edge-bench-rs/src/bin/edge-node.rs
+++ b/edge/src/bin/edge-node.rs
@@ -1,6 +1,6 @@
 //! The edge worker in Rust (REBUILD.md, part 2; commands/edge_node.ts): leases
 //! ranges from the coordinator, reads their XOVER chunks from its stream,
-//! indexes them (the same RangeIndexer as edge-bench-rs, kept identical to
+//! indexes them (the same RangeIndexer as edge-bench, kept identical to
 //! the TypeScript by check.ts) and posts the batches. One range per thread.
 //!
 //!   COORDINATOR_URL=… NODE_TOKEN=… edge-node [--threads N] [--batch-articles 500000] [--ranges N] [--max-mbit M]
@@ -8,9 +8,9 @@
 //! SIGTERM/SIGINT: each thread gives its range back after the current chunk
 //! (the next worker resumes at the last stored batch).
 
-use edge_bench_rs::indexer::{Batch, RangeIndexer};
-use edge_bench_rs::names::Rules;
-use edge_bench_rs::wire;
+use edge::indexer::{Batch, RangeIndexer};
+use edge::names::Rules;
+use edge::wire;
 use flate2::write::GzEncoder;
 use serde::Deserialize;
 use std::collections::HashMap;
diff --git a/tools/edge-bench-rs/src/codec.rs b/edge/src/codec.rs
similarity index 100%
rename from tools/edge-bench-rs/src/codec.rs
rename to edge/src/codec.rs
diff --git a/tools/edge-bench-rs/src/indexer.rs b/edge/src/indexer.rs
similarity index 100%
rename from tools/edge-bench-rs/src/indexer.rs
rename to edge/src/indexer.rs
diff --git a/tools/edge-bench-rs/src/js.rs b/edge/src/js.rs
similarity index 100%
rename from tools/edge-bench-rs/src/js.rs
rename to edge/src/js.rs
diff --git a/tools/edge-bench-rs/src/lib.rs b/edge/src/lib.rs
similarity index 96%
rename from tools/edge-bench-rs/src/lib.rs
rename to edge/src/lib.rs
index 3b8ca99..540a70a 100644
--- a/tools/edge-bench-rs/src/lib.rs
+++ b/edge/src/lib.rs
@@ -1,5 +1,5 @@
 //! The edge worker's indexing (lib/edge RangeIndexer and what it uses) in
-//! Rust, kept identical to the TypeScript (check.ts): the edge-bench-rs
+//! Rust, kept identical to the TypeScript (check.ts): the edge-bench
 //! benchmark and the edge-node worker share it.
 
 pub mod codec;
diff --git a/tools/edge-bench-rs/src/main.rs b/edge/src/main.rs
similarity index 95%
rename from tools/edge-bench-rs/src/main.rs
rename to edge/src/main.rs
index f7f8264..57fb5c7 100644
--- a/tools/edge-bench-rs/src/main.rs
+++ b/edge/src/main.rs
@@ -2,14 +2,14 @@
 //! --capture` (REBUILD.md, part 2: TypeScript or Rust). Same work as
 //! edge:bench's replay: inflate each chunk, scan it, aggregate files, cut off
 //! idle ones, and every N chunks judge and encode the releases. `--dump`
-//! writes every output as JSON lines for tools/edge-bench-rs/check.ts.
+//! writes every output as JSON lines for edge/check.ts.
 //!
-//!   edge-bench-rs <dir> [--batch-chunks 10] [--idle 5] [--dump out.jsonl] [--wire batches.jsonl]
+//!   edge-bench <dir> [--batch-chunks 10] [--idle 5] [--dump out.jsonl] [--wire batches.jsonl]
 
 use base64::Engine;
-use edge_bench_rs::indexer::{self, Batch, RangeIndexer};
-use edge_bench_rs::js::json_str;
-use edge_bench_rs::{names, wire};
+use edge::indexer::{self, Batch, RangeIndexer};
+use edge::js::json_str;
+use edge::{names, wire};
 use rustc_hash::FxHashMap;
 use std::io::Write;
 use std::time::Instant;
@@ -150,7 +150,7 @@ fn dump_batch(batch: &Batch, out: &mut impl Write) {
 
 fn main() {
     let args: Vec<String> = std::env::args().collect();
-    let dir = args.get(1).expect("usage: edge-bench-rs <dir> [--batch-chunks N] [--idle N] [--dump file]").clone();
+    let dir = args.get(1).expect("usage: edge-bench <dir> [--batch-chunks N] [--idle N] [--dump file]").clone();
     let flag = |name: &str| args.iter().position(|a| a == name).and_then(|i| args.get(i + 1)).cloned();
     let batch_chunks: usize = flag("--batch-chunks").map(|v| v.parse().unwrap()).unwrap_or(10);
     let idle: u64 = flag("--idle").map(|v| v.parse().unwrap()).unwrap_or(5);
diff --git a/tools/edge-bench-rs/src/names.rs b/edge/src/names.rs
similarity index 98%
rename from tools/edge-bench-rs/src/names.rs
rename to edge/src/names.rs
index ad2e411..db00429 100644
--- a/tools/edge-bench-rs/src/names.rs
+++ b/edge/src/names.rs
@@ -591,6 +591,11 @@ pub fn looks_random(name: &str) -> bool {
     if (8..=15).contains(&b.len()) && alnum && n_digit > 0 && n_lower > 0 && b[1..].iter().filter(|c| c.is_ascii_uppercase()).count() >= 3 {
         return true;
     }
+    // 51294P1CUKR2R35X: capitals and digits only, switching between them all over the token
+    // (COD4MW2REMASTERED switches 4 times, BEATLES1964REMASTER twice).
+    if b.len() >= 12 && b.iter().all(|c| c.is_ascii_uppercase() || c.is_ascii_digit()) && b.windows(2).filter(|w| w[0].is_ascii_digit() != w[1].is_ascii_digit()).count() >= 6 {
+        return true;
+    }
     if !(b.len() >= 16 && alnum) || n_lower == 0 || n_upper == 0 {
         return false;
     }
@@ -985,6 +990,9 @@ mod tests {
     fn random_names() {
         assert!(looks_random("prvjr7hapd0i1ny14pz4"));
         assert!(looks_random("RmISakytFwXSCEzjVEpaKk"));
+        assert!(looks_random("51294P1CUKR2R35X"));
+        assert!(!looks_random("COD4MW2REMASTERED"));
+        assert!(!looks_random("BEATLES1964REMASTER"));
         assert!(!looks_random("Some.Show.S01E01.1080p"));
         assert!(looks_random("VIDEO_TS"));
     }
diff --git a/tools/edge-bench-rs/src/wire.rs b/edge/src/wire.rs
similarity index 100%
rename from tools/edge-bench-rs/src/wire.rs
rename to edge/src/wire.rs
diff --git a/lib/release/random.ts b/lib/release/random.ts
index 1f9318d..68f0ef0 100644
--- a/lib/release/random.ts
+++ b/lib/release/random.ts
@@ -5,6 +5,17 @@ import { isGenericName } from './identity.js'
  * separators, and the other generated shapes seen on Usenet (LOG.md
  * 2026-10-01 (3)). Kept in step with SQL's is_readable_name().
  */
+/** How often a token goes from a letter to a digit or back. */
+function letterDigitSwitches(token: string): number {
+  let switches = 0
+  for (let i = 1; i < token.length; i++) {
+    const a = token.charCodeAt(i - 1) <= 57
+    const b = token.charCodeAt(i) <= 57
+    if (a !== b) switches++
+  }
+  return switches
+}
+
 export function looksRandom(name: string): boolean {
   // An unknown short extension (e.g. ".bin") says nothing about the name.
   name = name.replace(/\.[A-Za-z0-9]{1,4}$/, '')
@@ -21,6 +32,9 @@ export function looksRandom(name: string): boolean {
   if (/^[a-z0-9]{12,}$/.test(name) && (name.match(/\d/g)?.length ?? 0) >= 2 && (name.match(/[a-z]/g)?.length ?? 0) >= 4) return true
   // wHJ7s71sAGE: short, but capitals all over the token, not only at word starts
   if (/^[A-Za-z0-9]{8,15}$/.test(name) && /\d/.test(name) && /[a-z]/.test(name) && (name.slice(1).match(/[A-Z]/g)?.length ?? 0) >= 3) return true
+  // 51294P1CUKR2R35X: capitals and digits only, switching between them all over the token
+  // (COD4MW2REMASTERED switches 4 times, BEATLES1964REMASTER twice).
+  if (/^[A-Z0-9]{12,}$/.test(name) && letterDigitSwitches(name) >= 6) return true
   if (!/^[A-Za-z0-9]{16,}$/.test(name) || !/[a-z]/.test(name) || !/[A-Z]/.test(name)) return false
   // Digits, or many capitals without separators (e.g. RmISakytFwXSCEzjVEpaKk).
   return /\d/.test(name) || (name.match(/[A-Z]/g) ?? []).length >= 6
diff --git a/tests/unit/release/identity.spec.ts b/tests/unit/release/identity.spec.ts
index d205877..7d09724 100644
--- a/tests/unit/release/identity.spec.ts
+++ b/tests/unit/release/identity.spec.ts
@@ -78,6 +78,15 @@ test.group('release / releaseIdentity', () => {
     assert.equal(a.key, b.key)
   })
 
+  test('capitals and digits switching all over a token are random', async ({ assert }) => {
+    const { looksRandom } = await import('#lib/release/index')
+    assert.isTrue(looksRandom('51294P1CUKR2R35X'))
+    assert.isTrue(looksRandom('51294P1CUKR2R35X.part01.rar'.replace(/\.part01\.rar$/, '')))
+    assert.isFalse(looksRandom('COD4MW2REMASTERED'))
+    assert.isFalse(looksRandom('BEATLES1964REMASTER'))
+    assert.isFalse(looksRandom('HDTV1080P'))
+  })
+
   test('random extensionless names cannot be grouped by name', ({ assert }) => {
     const name = '204b914a977e5f891590ff1099c7a8caf1a0be537bfa5bf7f3a8b1213231'
     assert.isNull(releaseIdentity({ poster: 'x', subject: `"${name}" yEnc`, name, weak: true }))