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Add README (repo layout) and xet/LFS rule for fixtures/

#4
by sbrandeis HF Staff - opened
.gitattributes CHANGED
@@ -60,3 +60,4 @@ saved_model/**/* filter=lfs diff=lfs merge=lfs -text
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  *.webm filter=lfs diff=lfs merge=lfs -text
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  llama-3-tokenizer.json filter=lfs diff=lfs merge=lfs -text
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  xnli.txt filter=lfs diff=lfs merge=lfs -text
 
 
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  *.webm filter=lfs diff=lfs merge=lfs -text
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  llama-3-tokenizer.json filter=lfs diff=lfs merge=lfs -text
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  xnli.txt filter=lfs diff=lfs merge=lfs -text
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+ fixtures/**/*.txt filter=lfs diff=lfs merge=lfs -text
README.md ADDED
@@ -0,0 +1,36 @@
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1
+ ---
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+ pretty_name: tokenizers test data
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+ viewer: false
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+ ---
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+
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+ # tokenizers-test-data
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+
8
+ Test and benchmark fixtures for [huggingface/tokenizers](https://github.com/huggingface/tokenizers),
9
+ pulled on demand by the repo Makefiles (`make test` / `make bench` / `make fixtures`
10
+ via `hf download`).
11
+
12
+ ## Layout
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+
14
+ - `fixtures/` — multilingual + modality corpora for cross-language encode
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+ benchmarks. Organized, documented, and reproducible: see
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+ [`fixtures/FIXTURES.md`](./fixtures/FIXTURES.md) for provenance and
17
+ [`fixtures/fixtures_manifest.json`](./fixtures/fixtures_manifest.json) for
18
+ exact sources, pinned revisions, and sizes. Rebuild any file with
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+ [`fixtures/fetch_fixtures.py`](./fixtures/fetch_fixtures.py).
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+ - `fixtures/lang/<iso639-3>_<iso15924>.txt` — ~5 MB of real web text per
21
+ language (FineWeb-2 / FineWeb), 13 non-Latin scripts + English baseline
22
+ - `fixtures/modalities/` — source code, math/LaTeX, and coding-agent
23
+ trajectories
24
+ - **Root files (legacy)** — tokenizer JSONs, vocab/merges files, and text
25
+ corpora referenced by their flat paths from the `tokenizers` repo Makefiles
26
+ (Rust, Python, and Node bindings) on `main` and release branches. Do not
27
+ move or rename them; new additions should go into organized subdirectories
28
+ instead.
29
+
30
+ ## Licensing
31
+
32
+ Corpora under `fixtures/` are small excerpts of public datasets, each under
33
+ its own license — FineWeb/FineWeb-2 (ODC-By), open-web-math (ODC-By),
34
+ SWE-smith-trajectories (MIT), and permissively-licensed OSS repos for code
35
+ (see the manifest for the exact repo list and commit SHAs). Root-level files
36
+ predate this README and carry the licenses of their original sources.
fixtures/FIXTURES.md ADDED
@@ -0,0 +1,64 @@
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1
+ # Multilingual & modality benchmark fixtures
2
+
3
+ Plain-text fixtures for benchmarking encode performance across languages,
4
+ scripts, and content types. Built by `fetch_fixtures.py` (same directory);
5
+ exact per-file provenance — source dataset, config, split, pinned revision
6
+ SHA, byte/doc counts, build date — is recorded in `fixtures_manifest.json`.
7
+
8
+ Layout:
9
+
10
+ - `lang/` — natural-language corpora, one `<lang>_<script>.txt` per language
11
+ - `modalities/` — code, math, and agentic-trace corpora
12
+
13
+ Note: this whole `data/` directory is gitignored. To rebuild any file from
14
+ scratch:
15
+
16
+ ```sh
17
+ uv run --python 3.12 --with 'datasets>=3.2' fetch_fixtures.py [name ...]
18
+ ```
19
+
20
+ ## Natural languages — `lang/<lang>_<script>.txt`
21
+
22
+ Named by ISO 639-3 language code + ISO 15924 script code, matching the
23
+ config names of [HuggingFaceFW/fineweb-2](https://huggingface.co/datasets/HuggingFaceFW/fineweb-2),
24
+ the source for all non-English files (real, deduplicated, filtered web text;
25
+ ODC-By license). ~5 MB per language, whole documents separated by blank
26
+ lines, taken in dataset order from the (small) `test` split at a pinned
27
+ revision. `eng_Latn.txt` comes from
28
+ [HuggingFaceFW/fineweb](https://huggingface.co/datasets/HuggingFaceFW/fineweb)
29
+ (`sample-10BT`) as the Latin-script baseline.
30
+
31
+ Coverage: Devanagari (hin), Bengali (ben), Tamil (tam), Cyrillic (rus),
32
+ Arabic (arb, RTL), Hebrew (heb, RTL), Japanese (jpn), Hangul (kor),
33
+ Han (cmn), Thai (tha, no word separators), Greek (ell), Georgian (kat),
34
+ Ethiopic (amh), Latin (eng).
35
+
36
+ ## Modalities — `modalities/`
37
+
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+ - `code_mixed.txt` — source code, ~0.75 MB each of Python/JS/TS/Rust/Go/
39
+ Java/C/C++ from GitHub tarballs of well-known OSS repos (django, jquery,
40
+ vue, tokio, caddy, junit5, redis, fmt), pinned to the commit SHAs recorded
41
+ in the manifest and read in memory only. `bigcode/the-stack-smol` would
42
+ have been the HF-native choice but is gated and no valid HF token was
43
+ available at build time.
44
+ - `math_latex.txt` — mathematical web text with LaTeX from
45
+ [open-web-math/open-web-math](https://huggingface.co/datasets/open-web-math/open-web-math).
46
+ - `agentic_swe.txt` — real SWE-agent coding-assistant trajectories from
47
+ [SWE-bench/SWE-smith-trajectories](https://huggingface.co/datasets/SWE-bench/SWE-smith-trajectories),
48
+ serialized as `[role]\ncontent` blocks (tool calls, diffs, terminal output
49
+ included). Complements `agentic-traces.txt` (pre-existing synthetic
50
+ Claude-Code-style traces, provenance unrecorded — not managed by
51
+ `fetch_fixtures.py`, moved here from `data/` for tidiness; referenced by
52
+ `tk-encode`'s `pipeline_benchmark.rs` and `pipeline_oracle.rs`).
53
+
54
+ ## Safety notes
55
+
56
+ - `fetch_fixtures.py` forces `HF_DATASETS_TRUST_REMOTE_CODE=0` and only
57
+ reads parquet-native datasets — no dataset loading scripts execute.
58
+ - Revisions are pinned at fetch time (recorded in the manifest), so a
59
+ rebuild can't silently pull different upstream content.
60
+ - Content is raw web/code text: treat it as untrusted data. Fine to feed to
61
+ tokenizers; don't execute it, and prefer `less` over `cat` when eyeballing
62
+ it (raw web text can contain terminal escape sequences). NUL bytes are
63
+ stripped at build time; everything else is kept as-is on purpose — the
64
+ mess is representative.
fixtures/fetch_fixtures.py ADDED
@@ -0,0 +1,242 @@
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1
+ #!/usr/bin/env python3
2
+ """Build multilingual + modality text fixtures for tokenizer benchmarks.
3
+
4
+ Streams a few MB of real text per language/modality from public Hugging Face
5
+ datasets and writes plain .txt files into lang/ and modalities/ next to this
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+ script, plus a fixtures_manifest.json recording source dataset, config,
7
+ split, pinned revision SHA, and sizes. See FIXTURES.md for the
8
+ human-readable version.
9
+
10
+ Usage:
11
+ uv run --python 3.12 --with 'datasets>=3.2' fetch_fixtures.py [name ...]
12
+
13
+ With no args, builds every fixture. Names are file stems (e.g. hin_Deva).
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+
15
+ Safety: HF_DATASETS_TRUST_REMOTE_CODE is forced off — only parquet-native
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+ datasets are read, no dataset loading scripts ever execute. Downloaded
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+ content is treated strictly as text data.
18
+ """
19
+ from __future__ import annotations
20
+
21
+ import json
22
+ import os
23
+ import sys
24
+ import time
25
+ from pathlib import Path
26
+
27
+ os.environ["HF_DATASETS_TRUST_REMOTE_CODE"] = "0"
28
+
29
+ from datasets import load_dataset # noqa: E402
30
+ from huggingface_hub import HfApi # noqa: E402
31
+
32
+ HERE = Path(__file__).resolve().parent
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+ MANIFEST = HERE / "fixtures_manifest.json"
34
+ MB = 1024 * 1024
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+ LANG_TARGET = 5 * MB
36
+
37
+ FINEWEB2 = "HuggingFaceFW/fineweb-2"
38
+ FINEWEB2_CONFIGS = [
39
+ "hin_Deva", # Hindi, Devanagari
40
+ "ben_Beng", # Bengali
41
+ "tam_Taml", # Tamil
42
+ "rus_Cyrl", # Russian, Cyrillic
43
+ "arb_Arab", # Arabic (MSA), RTL
44
+ "heb_Hebr", # Hebrew, RTL
45
+ "jpn_Jpan", # Japanese, mixed kanji/kana
46
+ "kor_Hang", # Korean, Hangul
47
+ "cmn_Hani", # Mandarin, Han
48
+ "tha_Thai", # Thai, no word separators
49
+ "ell_Grek", # Greek
50
+ "kat_Geor", # Georgian
51
+ "amh_Ethi", # Amharic, Ethiopic
52
+ ]
53
+
54
+ # the-stack-smol would be preferable but is gated; these are pinned-SHA GitHub
55
+ # tarballs instead, read in memory only (never extracted to disk).
56
+ CODE_REPOS = [
57
+ ("python", "django/django", (".py",)),
58
+ ("javascript", "jquery/jquery", (".js",)),
59
+ ("typescript", "vuejs/core", (".ts",)),
60
+ ("rust", "tokio-rs/tokio", (".rs",)),
61
+ ("go", "caddyserver/caddy", (".go",)),
62
+ ("java", "junit-team/junit5", (".java",)),
63
+ ("c", "redis/redis", (".c", ".h")),
64
+ ("cpp", "fmtlib/fmt", (".cc", ".h")),
65
+ ]
66
+ CODE_SKIP_DIRS = ("deps/", "vendor/", "node_modules/", "third_party", "dist/")
67
+
68
+ _api = HfApi()
69
+ _shas: dict[str, str] = {}
70
+
71
+
72
+ def pinned_sha(repo: str) -> str:
73
+ if repo not in _shas:
74
+ _shas[repo] = _api.dataset_info(repo).sha
75
+ return _shas[repo]
76
+
77
+
78
+ def stream(repo: str, split: str = "train", **kw):
79
+ return load_dataset(repo, split=split, streaming=True, revision=pinned_sha(repo), **kw)
80
+
81
+
82
+ def fineweb2_docs(cfg: str):
83
+ try:
84
+ ds, split = stream(FINEWEB2, split="test", name=cfg), "test"
85
+ except Exception:
86
+ ds, split = stream(FINEWEB2, split="train", name=cfg), "train"
87
+ return (ex["text"] for ex in ds), {"config": cfg, "split": split}
88
+
89
+
90
+ def eng_docs():
91
+ ds = stream("HuggingFaceFW/fineweb", name="sample-10BT")
92
+ return (ex["text"] for ex in ds), {"config": "sample-10BT", "split": "train"}
93
+
94
+
95
+ def code_docs():
96
+ import tarfile
97
+ import urllib.request
98
+
99
+ per_lang = (6 * MB) // len(CODE_REPOS)
100
+ pins: dict[str, str] = {}
101
+
102
+ def head_sha(repo: str) -> str:
103
+ req = urllib.request.Request(
104
+ f"https://api.github.com/repos/{repo}/commits/HEAD",
105
+ headers={"Accept": "application/vnd.github.sha"},
106
+ )
107
+ with urllib.request.urlopen(req) as r:
108
+ return r.read().decode().strip()
109
+
110
+ def gen():
111
+ for lang, repo, exts in CODE_REPOS:
112
+ sha = head_sha(repo)
113
+ pins[repo] = sha
114
+ url = f"https://codeload.github.com/{repo}/tar.gz/{sha}"
115
+ got = 0
116
+ with urllib.request.urlopen(url) as r:
117
+ with tarfile.open(fileobj=r, mode="r|gz") as tar:
118
+ for member in tar:
119
+ if got >= per_lang:
120
+ break
121
+ path = member.name.lower()
122
+ if not member.isfile() or member.size > 200_000:
123
+ continue
124
+ if not path.endswith(exts) or any(d in path for d in CODE_SKIP_DIRS):
125
+ continue
126
+ text = tar.extractfile(member).read().decode("utf-8", errors="replace")
127
+ yield f"// {member.name}\n{text}"
128
+ got += len(text.encode("utf-8"))
129
+
130
+ # pins is filled while gen() runs; build() reads meta only after consuming docs
131
+ return gen(), {"revision": pins}
132
+
133
+
134
+ def math_docs():
135
+ ds = stream("open-web-math/open-web-math")
136
+ return (ex["text"] for ex in ds), {"split": "train"}
137
+
138
+
139
+ def agentic_docs():
140
+ # single-shard hf_hub_download instead of streaming: the 249MB shard's
141
+ # range-reads time out on unauthenticated connections
142
+ import pyarrow.parquet as pq
143
+ from huggingface_hub import hf_hub_download
144
+
145
+ repo = "SWE-bench/SWE-smith-trajectories"
146
+ shard = "data/tool-00000-of-00008.parquet"
147
+ path = hf_hub_download(repo, shard, repo_type="dataset", revision=pinned_sha(repo))
148
+
149
+ def rows():
150
+ pf = pq.ParquetFile(path)
151
+ for batch in pf.iter_batches(columns=["messages"], batch_size=8):
152
+ yield from batch.column("messages").to_pylist()
153
+
154
+ def render(content):
155
+ if isinstance(content, str):
156
+ return content
157
+ if isinstance(content, list):
158
+ return "\n".join(
159
+ b.get("text", json.dumps(b, ensure_ascii=False)) if isinstance(b, dict) else str(b)
160
+ for b in content
161
+ )
162
+ return json.dumps(content, ensure_ascii=False)
163
+
164
+ def gen():
165
+ for raw in rows():
166
+ parts = []
167
+ for msg in json.loads(raw):
168
+ block = f"[{msg.get('role', '?')}]\n{render(msg.get('content', ''))}"
169
+ if msg.get("tool_calls"):
170
+ block += "\n" + json.dumps(msg["tool_calls"], ensure_ascii=False)
171
+ parts.append(block)
172
+ yield "\n\n".join(parts)
173
+
174
+ return gen(), {"split": "tool", "config": shard}
175
+
176
+
177
+ FIXTURES: dict[str, dict] = {
178
+ cfg: {"source": FINEWEB2, "docs": (lambda c=cfg: fineweb2_docs(c)), "target": LANG_TARGET, "dir": "lang"}
179
+ for cfg in FINEWEB2_CONFIGS
180
+ }
181
+ FIXTURES["eng_Latn"] = {"source": "HuggingFaceFW/fineweb", "docs": eng_docs, "target": LANG_TARGET, "dir": "lang"}
182
+ FIXTURES["code_mixed"] = {"source": "github.com (pinned repo tarballs)", "docs": code_docs, "target": 6 * MB, "dir": "modalities"}
183
+ FIXTURES["math_latex"] = {"source": "open-web-math/open-web-math", "docs": math_docs, "target": LANG_TARGET, "dir": "modalities"}
184
+ FIXTURES["agentic_swe"] = {"source": "SWE-bench/SWE-smith-trajectories", "docs": agentic_docs, "target": LANG_TARGET, "dir": "modalities"}
185
+
186
+
187
+ def build(name: str, spec: dict) -> dict:
188
+ docs, meta = spec["docs"]()
189
+ out = HERE / spec["dir"] / f"{name}.txt"
190
+ out.parent.mkdir(exist_ok=True)
191
+ written = n_docs = 0
192
+ with open(out, "w", encoding="utf-8") as f:
193
+ for text in docs:
194
+ if not text or not text.strip():
195
+ continue
196
+ chunk = text.replace("\0", "").rstrip("\n") + "\n\n"
197
+ f.write(chunk)
198
+ written += len(chunk.encode("utf-8"))
199
+ n_docs += 1
200
+ if written >= spec["target"]:
201
+ break
202
+ if "revision" not in meta:
203
+ meta["revision"] = pinned_sha(spec["source"])
204
+ return {
205
+ "file": f"{spec['dir']}/{out.name}",
206
+ "source": spec["source"],
207
+ **meta,
208
+ "bytes": written,
209
+ "docs": n_docs,
210
+ "built_at": time.strftime("%Y-%m-%d", time.gmtime()),
211
+ "builder": Path(__file__).name,
212
+ }
213
+
214
+
215
+ def main() -> int:
216
+ names = sys.argv[1:] or list(FIXTURES)
217
+ unknown = [n for n in names if n not in FIXTURES]
218
+ if unknown:
219
+ print(f"unknown fixtures: {unknown}\navailable: {list(FIXTURES)}", file=sys.stderr)
220
+ return 2
221
+
222
+ manifest = json.loads(MANIFEST.read_text()) if MANIFEST.exists() else {}
223
+ failures = []
224
+ for name in names:
225
+ print(f"building {name} ...", flush=True)
226
+ try:
227
+ entry = build(name, FIXTURES[name])
228
+ except Exception as e:
229
+ print(f" FAILED {name}: {type(e).__name__}: {e}", file=sys.stderr, flush=True)
230
+ failures.append(name)
231
+ continue
232
+ manifest[name] = entry
233
+ MANIFEST.write_text(json.dumps(manifest, indent=2, sort_keys=True) + "\n")
234
+ print(f" {entry['bytes'] / MB:.1f} MB, {entry['docs']} docs", flush=True)
235
+
236
+ if failures:
237
+ print(f"failed: {failures}", file=sys.stderr)
238
+ return 1 if failures else 0
239
+
240
+
241
+ if __name__ == "__main__":
242
+ sys.exit(main())
fixtures/fixtures_manifest.json ADDED
@@ -0,0 +1,195 @@
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1
+ {
2
+ "agentic_swe": {
3
+ "builder": "fetch_fixtures.py",
4
+ "built_at": "2026-07-02",
5
+ "bytes": 5243644,
6
+ "config": "data/tool-00000-of-00008.parquet",
7
+ "docs": 57,
8
+ "file": "modalities/agentic_swe.txt",
9
+ "revision": "08e109b4a59eaeebf80e4675cd125d42e7ac99a4",
10
+ "source": "SWE-bench/SWE-smith-trajectories",
11
+ "split": "tool"
12
+ },
13
+ "amh_Ethi": {
14
+ "builder": "fetch_fixtures.py",
15
+ "built_at": "2026-07-02",
16
+ "bytes": 5250444,
17
+ "config": "amh_Ethi",
18
+ "docs": 830,
19
+ "file": "lang/amh_Ethi.txt",
20
+ "revision": "af9c13333eb981300149d5ca60a8e9d659b276b9",
21
+ "source": "HuggingFaceFW/fineweb-2",
22
+ "split": "test"
23
+ },
24
+ "arb_Arab": {
25
+ "builder": "fetch_fixtures.py",
26
+ "built_at": "2026-07-02",
27
+ "bytes": 5242931,
28
+ "config": "arb_Arab",
29
+ "docs": 929,
30
+ "file": "lang/arb_Arab.txt",
31
+ "revision": "af9c13333eb981300149d5ca60a8e9d659b276b9",
32
+ "source": "HuggingFaceFW/fineweb-2",
33
+ "split": "test"
34
+ },
35
+ "ben_Beng": {
36
+ "builder": "fetch_fixtures.py",
37
+ "built_at": "2026-07-02",
38
+ "bytes": 5244403,
39
+ "config": "ben_Beng",
40
+ "docs": 800,
41
+ "file": "lang/ben_Beng.txt",
42
+ "revision": "af9c13333eb981300149d5ca60a8e9d659b276b9",
43
+ "source": "HuggingFaceFW/fineweb-2",
44
+ "split": "test"
45
+ },
46
+ "cmn_Hani": {
47
+ "builder": "fetch_fixtures.py",
48
+ "built_at": "2026-07-02",
49
+ "bytes": 5245713,
50
+ "config": "cmn_Hani",
51
+ "docs": 1404,
52
+ "file": "lang/cmn_Hani.txt",
53
+ "revision": "af9c13333eb981300149d5ca60a8e9d659b276b9",
54
+ "source": "HuggingFaceFW/fineweb-2",
55
+ "split": "test"
56
+ },
57
+ "code_mixed": {
58
+ "builder": "fetch_fixtures.py",
59
+ "built_at": "2026-07-02",
60
+ "bytes": 6292393,
61
+ "docs": 1082,
62
+ "file": "modalities/code_mixed.txt",
63
+ "revision": {
64
+ "caddyserver/caddy": "13a4c3f43c79ca04064457ab9cf95b376c294141",
65
+ "django/django": "f3f9601cff03b38942e70ce8042bdfdec6002449",
66
+ "fmtlib/fmt": "77b6ff700be3417e0a3ad9674ca306e40c451b6b",
67
+ "jquery/jquery": "d6fb53bce28d597ac309ec81efe761bd410bdf41",
68
+ "junit-team/junit5": "f4c6eae9e10a34e73f744d16adcd9e16997f078c",
69
+ "redis/redis": "5b22a09918743ba72952e35e431db23eb3d19605",
70
+ "tokio-rs/tokio": "9fe3c5619dced7157fe46104641d2e1d0af44417",
71
+ "vuejs/core": "c0606e91798c8dca4f33d101e1dd836d672592c1"
72
+ },
73
+ "source": "github.com (pinned repo tarballs)"
74
+ },
75
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