Add source: sejm_api — contemporary parliamentary speeches (2023 onward) (#16)

- Add source: sejm_api — contemporary parliamentary speeches (2023 onward) (503c9db5d79c4b2f7fb9ebbfb40bfd3b679e2526)


Co-authored-by: Piotr Styla <PiotrSty@users.noreply.huggingface.co>

.gitattributes

@@ -59,3 +59,4 @@ data/samorzad_gov_pl/*.jsonl filter=lfs diff=lfs merge=lfs -text
 # Video files - compressed
 *.mp4 filter=lfs diff=lfs merge=lfs -text
 *.webm filter=lfs diff=lfs merge=lfs -text
+data/sejm_api/sejm_api.attribution.jsonl filter=lfs diff=lfs merge=lfs -text

artifacts/sejm_api_ontology_manifest.json

@@ -0,0 +1,238 @@
+{
+  "actors": [
+    {
+      "id": "github:PiotrStyla",
+      "kind": "automation"
+    }
+  ],
+  "attestations": [
+    {
+      "actor_id": "github:PiotrStyla",
+      "fields": [
+        "id",
+        "text",
+        "source",
+        "added",
+        "created",
+        "token_count",
+        "license",
+        "author"
+      ],
+      "type": "schema_valid",
+      "value": true
+    },
+    {
+      "actor_id": "github:PiotrStyla",
+      "supported_by": [
+        "slayer://evidence/sejm-api-legal-basis@sha256:38e42a791d68d593f82e"
+      ],
+      "type": "license_policy",
+      "value": "open_public_sector_reuse"
+    },
+    {
+      "actor_id": "github:PiotrStyla",
+      "supported_by": [
+        "slayer://evidence/sejm-api-temporal-novelty@sha256:38e42a791d68d593f82e"
+      ],
+      "type": "temporal_overlap",
+      "value": "none_for_registered_parliamentary_sources"
+    },
+    {
+      "actor_id": "github:PiotrStyla",
+      "supported_by": [
+        "slayer://evidence/sejm-api-author-attribution@sha256:38e42a791d68d593f82e"
+      ],
+      "type": "speaker_attribution",
+      "value": "100_percent"
+    }
+  ],
+  "claim_evidence": [
+    {
+      "claim_id": "slayer://claim/sejm-api-temporal-novelty@sha256:38e42a791d68d593f82e",
+      "evidence_id": "slayer://evidence/sejm-api-temporal-novelty@sha256:38e42a791d68d593f82e",
+      "relation": "SUPPORTS"
+    },
+    {
+      "claim_id": "slayer://claim/sejm-api-full-speaker-attribution@sha256:38e42a791d68d593f82e",
+      "evidence_id": "slayer://evidence/sejm-api-author-attribution@sha256:38e42a791d68d593f82e",
+      "relation": "SUPPORTS"
+    },
+    {
+      "claim_id": "slayer://claim/sejm-api-open-official-materials@sha256:38e42a791d68d593f82e",
+      "evidence_id": "slayer://evidence/sejm-api-legal-basis@sha256:38e42a791d68d593f82e",
+      "relation": "SUPPORTS"
+    }
+  ],
+  "claims": [
+    {
+      "asserted_by": "github:PiotrStyla",
+      "falsification_condition": "Any contributed created date is <= either documented source end date.",
+      "id": "slayer://claim/sejm-api-temporal-novelty@sha256:38e42a791d68d593f82e",
+      "scope": [
+        "slayer://version/dataset-source/sejm-api@sha256:38e42a791d68d593f82e1125f2bb94cd8f68212433e71d3e3da90f82d78eaf32"
+      ],
+      "statement": "Every contributed speech postdates both registered parliamentary source ranges.",
+      "supported_by": [
+        "slayer://evidence/sejm-api-temporal-novelty@sha256:38e42a791d68d593f82e"
+      ]
+    },
+    {
+      "asserted_by": "github:PiotrStyla",
+      "falsification_condition": "Any contributed document has an empty author field.",
+      "id": "slayer://claim/sejm-api-full-speaker-attribution@sha256:38e42a791d68d593f82e",
+      "scope": [
+        "slayer://version/dataset-source/sejm-api@sha256:38e42a791d68d593f82e1125f2bb94cd8f68212433e71d3e3da90f82d78eaf32"
+      ],
+      "statement": "Every contributed document has a non-empty speech-speaker attribution.",
+      "supported_by": [
+        "slayer://evidence/sejm-api-author-attribution@sha256:38e42a791d68d593f82e"
+      ]
+    },
+    {
+      "asserted_by": "github:PiotrStyla",
+      "falsification_condition": "A record is not an official parliamentary material or an applicable statutory limitation defeats reuse.",
+      "id": "slayer://claim/sejm-api-open-official-materials@sha256:38e42a791d68d593f82e",
+      "scope": [
+        "slayer://version/dataset-source/sejm-api@sha256:38e42a791d68d593f82e1125f2bb94cd8f68212433e71d3e3da90f82d78eaf32"
+      ],
+      "statement": "The source contains official parliamentary materials with documented statutory reuse.",
+      "supported_by": [
+        "slayer://evidence/sejm-api-legal-basis@sha256:38e42a791d68d593f82e"
+      ]
+    }
+  ],
+  "evidence": [
+    {
+      "id": "slayer://evidence/sejm-api-record-counts@sha256:38e42a791d68d593f82e",
+      "observation_type": "dataset_record_counts",
+      "payload": {
+        "drop_before_start": 118902,
+        "drop_dup": 0,
+        "kept": 38812,
+        "read": 157714,
+        "tokens": 36335587
+      },
+      "run_id": "github-actions:32586999448:attempt:1",
+      "subject_version": "slayer://version/dataset-source/sejm-api@sha256:38e42a791d68d593f82e1125f2bb94cd8f68212433e71d3e3da90f82d78eaf32"
+    },
+    {
+      "id": "slayer://evidence/sejm-api-temporal-novelty@sha256:38e42a791d68d593f82e",
+      "observation_type": "registered_source_date_ranges",
+      "payload": {
+        "candidate_max": "2026-07-03",
+        "candidate_min": "2023-01-11",
+        "existing_source_end_dates": {
+          "parlamint_pl": "2022-12-31",
+          "parliamentary": "2019-12-31"
+        }
+      },
+      "run_id": "github-actions:32586999448:attempt:1",
+      "subject_version": "slayer://version/dataset-source/sejm-api@sha256:38e42a791d68d593f82e1125f2bb94cd8f68212433e71d3e3da90f82d78eaf32"
+    },
+    {
+      "id": "slayer://evidence/sejm-api-author-attribution@sha256:38e42a791d68d593f82e",
+      "observation_type": "speaker_attribution_coverage",
+      "payload": {
+        "attributed_documents": 38812,
+        "documents": 38812
+      },
+      "run_id": "github-actions:32586999448:attempt:1",
+      "subject_version": "slayer://version/dataset-source/sejm-api@sha256:38e42a791d68d593f82e1125f2bb94cd8f68212433e71d3e3da90f82d78eaf32"
+    },
+    {
+      "id": "slayer://evidence/sejm-api-legal-basis@sha256:38e42a791d68d593f82e",
+      "observation_type": "official_statutory_reuse_sources",
+      "payload": {
+        "copyright_act": "https://eli.gov.pl/api/acts/DU/2025/24/text/O/D20250024.pdf",
+        "legal_evidence_sha256": "ff52cd0c374aee51162d4088088f7bdfbabaa9c6e3d1816063b404b11369da0f",
+        "license": "public-domain (official documents)",
+        "open_data_act": "https://eli.gov.pl/api/acts/DU/2023/1524/text.html",
+        "source_documentation": "https://api.sejm.gov.pl/sejm.html"
+      },
+      "run_id": "github-actions:32586999448:attempt:1",
+      "subject_version": "slayer://version/dataset-source/sejm-api@sha256:38e42a791d68d593f82e1125f2bb94cd8f68212433e71d3e3da90f82d78eaf32"
+    },
+    {
+      "id": "slayer://evidence/sejm-api-artifact-digests@sha256:38e42a791d68d593f82e",
+      "observation_type": "artifact_checksums",
+      "payload": {
+        "attribution_sha256": "4ab6513f8173498d403f7ec1a9534b8e0086264d3eca6ff9ac4f9c5dbca4c069",
+        "parquet_sha256": "56f7b03483488dec8f0fa145c6d26746926175d83096e9d1931e535aa81cf161"
+      },
+      "run_id": "github-actions:32586999448:attempt:1",
+      "subject_version": "slayer://version/dataset-source/sejm-api@sha256:38e42a791d68d593f82e1125f2bb94cd8f68212433e71d3e3da90f82d78eaf32"
+    }
+  ],
+  "object": {
+    "id": "slayer://object/dataset-source/slayerlab-polish-dynaword-sejm-api",
+    "kind": "dataset_source",
+    "name": "sejm_api"
+  },
+  "protocol": {
+    "configuration": {
+      "added": "2026-08-22",
+      "exact_deduplication": "sha1(normalized_text)",
+      "registered_parliamentary_end_dates": {
+        "parlamint_pl": "2022-12-31",
+        "parliamentary": "2019-12-31"
+      },
+      "schema_fields": [
+        "id",
+        "text",
+        "source",
+        "added",
+        "created",
+        "token_count",
+        "license",
+        "author"
+      ],
+      "source_release": "v1.0.1",
+      "source_revision": "124557799608ce4212cf22fa90ca7904618de1b6",
+      "start_date": "2023-01-01",
+      "target_base_revision": "8cc48a3c564ac9edabfbbf012842ad11f70a3e5c",
+      "tokenizer": "cl100k_base"
+    },
+    "entrypoint": "python src/fetch_sejm_api.py",
+    "git_commit": "2a50019652d90f135f0d3a91c8c2c7176619c784"
+  },
+  "relations": [
+    {
+      "introduced_by_run": "github-actions:32586999448:attempt:1",
+      "predicate": "DERIVED_FROM",
+      "source_version": "slayer://version/dataset-source/sejm-api@sha256:38e42a791d68d593f82e1125f2bb94cd8f68212433e71d3e3da90f82d78eaf32",
+      "target_version": "hf://datasets/PiotrSty/sejm-speeches-corpus@124557799608ce4212cf22fa90ca7904618de1b6"
+    },
+    {
+      "introduced_by_run": "github-actions:32586999448:attempt:1",
+      "predicate": "COMPATIBLE_WITH",
+      "source_version": "slayer://version/dataset-source/sejm-api@sha256:38e42a791d68d593f82e1125f2bb94cd8f68212433e71d3e3da90f82d78eaf32",
+      "target_version": "hf://datasets/SlayerLab/polish-dynaword@8cc48a3c564ac9edabfbbf012842ad11f70a3e5c"
+    }
+  ],
+  "run": {
+    "actor_id": "github:PiotrStyla",
+    "git_commit": "2a50019652d90f135f0d3a91c8c2c7176619c784",
+    "id": "github-actions:32586999448:attempt:1",
+    "inputs": [
+      {
+        "role": "source",
+        "version_id": "hf://datasets/PiotrSty/sejm-speeches-corpus@124557799608ce4212cf22fa90ca7904618de1b6"
+      },
+      {
+        "role": "target_base",
+        "version_id": "hf://datasets/SlayerLab/polish-dynaword@8cc48a3c564ac9edabfbbf012842ad11f70a3e5c"
+      }
+    ],
+    "outputs": [
+      {
+        "role": "dataset_source",
+        "version_id": "slayer://version/dataset-source/sejm-api@sha256:38e42a791d68d593f82e1125f2bb94cd8f68212433e71d3e3da90f82d78eaf32"
+      }
+    ]
+  },
+  "schema_version": "slayer.ai/dataset-source-contribution/v1",
+  "version": {
+    "digest": "sha256:38e42a791d68d593f82e1125f2bb94cd8f68212433e71d3e3da90f82d78eaf32",
+    "id": "slayer://version/dataset-source/sejm-api@sha256:38e42a791d68d593f82e1125f2bb94cd8f68212433e71d3e3da90f82d78eaf32"
+  }
+}

data/sejm_api/NOTICE.md

@@ -0,0 +1,9 @@
+# Source attribution
+
+Official materials: Kancelaria Sejmu RP, API Sejmu — https://api.sejm.gov.pl/.
+
+Speech attribution is preserved in `author`; the full source URL is in `sejm_api.attribution.jsonl`.
+
+Corpus preparation and contribution: Piotr Styła (Hugging Face: PiotrSty; GitHub: PiotrStyla).
+
+Reuse follows Polish Copyright Act art. 4(2) and the Polish Open Data Act. No upstream Creative Commons grant is asserted.

data/sejm_api/sejm_api.attribution.jsonl

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:4ab6513f8173498d403f7ec1a9534b8e0086264d3eca6ff9ac4f9c5dbca4c069
+size 18722278

data/sejm_api/sejm_api.license-evidence.json

@@ -0,0 +1,34 @@
+{
+  "copyright_basis": {
+    "act": "Polish Copyright and Related Rights Act",
+    "article": "4(2)",
+    "finding": "official documents and materials are excluded from copyright",
+    "url": "https://eli.gov.pl/api/acts/DU/2025/24/text/O/D20250024.pdf"
+  },
+  "dataset_record_license": "public-domain (official documents)",
+  "hf_source_license_name": "polish-public-sector-open-statutory-reuse",
+  "limitations": [
+    "privacy and personal-data exceptions",
+    "third-party rights and provider-specific conditions",
+    "no upstream Creative Commons grant is asserted"
+  ],
+  "official_source": "https://api.sejm.gov.pl/",
+  "official_source_documentation": "https://api.sejm.gov.pl/sejm.html",
+  "pinned_source": "hf://datasets/PiotrSty/sejm-speeches-corpus@124557799608ce4212cf22fa90ca7904618de1b6",
+  "pinned_target_base": "hf://datasets/SlayerLab/polish-dynaword@8cc48a3c564ac9edabfbbf012842ad11f70a3e5c",
+  "provider": "Kancelaria Sejmu RP",
+  "reuse_basis": {
+    "act": "Polish Open Data and Reuse of Public Sector Information Act",
+    "articles": [
+      "2(12)",
+      "5",
+      "6",
+      "14(1)",
+      "15",
+      "17"
+    ],
+    "url": "https://eli.gov.pl/api/acts/DU/2023/1524/text.html"
+  },
+  "source": "sejm_api",
+  "status": "reviewed-open-official-materials"
+}

data/sejm_api/sejm_api.md

@@ -0,0 +1,65 @@
+# sejm_api
+
+Contemporary official Polish Sejm speeches, supplementing existing parliamentary sources.
+
+## Dataset description
+
+- Source (upstream): https://api.sejm.gov.pl/
+- Source documentation: https://api.sejm.gov.pl/sejm.html
+- Domain: political/spoken
+- Language: Polish (`pl`)
+- License: `public-domain (official documents)`
+- Created (range): 2023-01-11, 2026-07-03
+- Added: 2026-08-22
+- Contributor: Piotr Styła (`PiotrSty` on Hugging Face; `PiotrStyla` on GitHub).
+
+## Licensing — traceable basis
+
+Official parliamentary documents and materials are excluded from copyright by
+article 4(2) of the Polish Copyright Act: https://eli.gov.pl/api/acts/DU/2025/24/text/O/D20250024.pdf.
+
+Reuse of public-sector information is governed by articles 2(12), 5, 6, 14,
+15 and 17 of the Polish Open Data Act: https://eli.gov.pl/api/acts/DU/2023/1524/text.html.
+
+The per-document value intentionally matches the existing `parliamentary`
+source. No unverified upstream Creative Commons license is asserted.
+
+## Provenance and reproducibility
+
+- Official provider: Kancelaria Sejmu RP.
+- Immutable source release: `PiotrSty/sejm-speeches-corpus@v1.0.1`.
+- Pinned source commit: `124557799608ce4212cf22fa90ca7904618de1b6`.
+- Reviewed DynaWord base commit: `8cc48a3c564ac9edabfbbf012842ad11f70a3e5c`.
+- Rebuild: `python src/fetch_sejm_api.py --help`.
+- Source URLs and speech-level provenance are in `sejm_api.attribution.jsonl`.
+- Slayer contribution digest: `sha256:38e42a791d68d593f82e1125f2bb94cd8f68212433e71d3e3da90f82d78eaf32`.
+
+## Temporal novelty and deduplication
+
+`parliamentary` ends on `2019-12-31` and registered
+`parlamint_pl` ends on `2022-12-31`. Every contributed
+record is dated on or after `2023-01-01`, so its date range overlaps neither
+source. Exact duplicate speech texts within the contribution are removed using
+SHA-1 fingerprints; this is not a claim of global cross-domain near-deduplication.
+
+## Statistics
+
+| Measure | Value |
+|---|---:|
+| Source rows inspected | 157,714 |
+| Rows before 2023-01-01 | 118,902 |
+| Exact duplicate texts removed | 0 |
+| Documents published | 38,812 |
+| Characters | 96,596,566 |
+| Tokens (`cl100k_base` proxy) | 36,335,587 |
+| Documents with speaker attribution | 38,812 |
+
+Statistics are recomputed from the released Parquet file. The canonical schema
+is `id, text, source, added, created, token_count, license, author`.
+
+## Privacy and limitations
+
+The upstream release heuristically redacts email addresses, PESEL identifiers
+and unambiguous Polish telephone numbers. Public-official names and speech
+attribution remain. Regex redaction is not a guarantee of zero personal data.
+Downstream users must review applicable privacy, third-party and source terms.

data/sejm_api/sejm_api.parquet

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:56f7b03483488dec8f0fa145c6d26746926175d83096e9d1931e535aa81cf161
+size 35267581

data/sejm_api/sejm_api.stats.json

@@ -0,0 +1,36 @@
+{
+  "added": "2026-08-22",
+  "authors_with_value": 38812,
+  "by_source_split": {
+    "train": 38053,
+    "validation": 759
+  },
+  "by_term": {
+    "10": 30789,
+    "9": 8023
+  },
+  "by_year": {
+    "2023": 10220,
+    "2024": 4788,
+    "2025": 13712,
+    "2026": 10092
+  },
+  "chars": 96596566,
+  "created_max": "2026-07-03",
+  "created_min": "2023-01-11",
+  "drop_before_start": 118902,
+  "drop_dup": 0,
+  "drop_lang": 0,
+  "drop_ocr": 0,
+  "drop_short": 0,
+  "kept": 38812,
+  "license": "public-domain (official documents)",
+  "licenses": {
+    "public-domain (official documents)": 38812
+  },
+  "read": 157714,
+  "source_revision": "124557799608ce4212cf22fa90ca7904618de1b6",
+  "stats_recomputed_from_parquet": true,
+  "target_base_revision": "8cc48a3c564ac9edabfbbf012842ad11f70a3e5c",
+  "tokens": 36335587
+}

src/fetch_sejm_api.py

@@ -0,0 +1,600 @@
+#!/usr/bin/env python3
+"""Build a reproducible, ontology-backed Polish DynaWord Sejm API contribution."""
+
+from __future__ import annotations
+
+import argparse
+import ast
+import collections
+import datetime as dt
+import hashlib
+import json
+import os
+import pathlib
+import re
+import shutil
+import sys
+from typing import Any, Iterable
+
+
+SOURCE_NAME = "sejm_api"
+SOURCE_REPOSITORY = "PiotrSty/sejm-speeches-corpus"
+SOURCE_RELEASE = "v1.0.1"
+TARGET_REPOSITORY = "SlayerLab/polish-dynaword"
+SOURCE_LICENSE = "public-domain (official documents)"
+START_DATE = "2023-01-01"
+EXPECTED_FIELDS = (
+    "id", "text", "source", "added", "created", "token_count", "license", "author"
+)
+SOURCE_FIELDS = (
+    "text", "speaker", "date", "term", "source_url", "char_count", "word_count", "has_events"
+)
+COPYRIGHT_ACT = "https://eli.gov.pl/api/acts/DU/2025/24/text/O/D20250024.pdf"
+OPEN_DATA_ACT = "https://eli.gov.pl/api/acts/DU/2023/1524/text.html"
+SEJM_API = "https://api.sejm.gov.pl/"
+SEJM_API_DOCUMENTATION = "https://api.sejm.gov.pl/sejm.html"
+COMMIT_PATTERN = re.compile(r"^[0-9a-f]{40}$")
+
+
+class ContributionError(ValueError):
+    """Raised when the contribution cannot meet its declared contract."""
+
+
+def canonical_sha256(value: Any) -> str:
+    payload = json.dumps(
+        value, ensure_ascii=False, sort_keys=True, separators=(",", ":")
+    ).encode("utf-8")
+    return hashlib.sha256(payload).hexdigest()
+
+
+def sha256_file(path: pathlib.Path) -> str:
+    digest = hashlib.sha256()
+    with path.open("rb") as stream:
+        for chunk in iter(lambda: stream.read(1024 * 1024), b""):
+            digest.update(chunk)
+    return digest.hexdigest()
+
+
+def stable_document_id(row: dict[str, Any]) -> str:
+    material = "\x1f".join(
+        str(row.get(field, "")).strip() for field in ("date", "term", "speaker", "text")
+    )
+    return f"{SOURCE_NAME}_{hashlib.sha256(material.encode('utf-8')).hexdigest()}"
+
+
+def text_fingerprint(text: str) -> str:
+    return hashlib.sha1(text.encode("utf-8")).hexdigest()
+
+
+def normalize_source_row(
+    row: dict[str, Any], *, start_date: str, added_date: str, encoder: Any
+) -> tuple[dict[str, Any], dict[str, Any]] | None:
+    missing = set(SOURCE_FIELDS) - set(row)
+    if missing:
+        raise ContributionError(f"missing required source fields: {sorted(missing)}")
+    try:
+        created = dt.date.fromisoformat(str(row["date"])[:10]).isoformat()
+        threshold = dt.date.fromisoformat(start_date)
+        dt.date.fromisoformat(added_date)
+    except ValueError as exc:
+        raise ContributionError("source, threshold and addition dates must be ISO dates") from exc
+    if dt.date.fromisoformat(created) < threshold:
+        return None
+
+    text = str(row["text"]).strip()
+    author = str(row.get("speaker", "")).strip()
+    source_url = str(row.get("source_url", "")).strip()
+    term = str(row.get("term", "")).strip()
+    if len(text) < 200:
+        raise ContributionError("source speech violates DynaWord's 200-character minimum")
+    if not author:
+        raise ContributionError("source speech lacks the promised speaker attribution")
+    if not source_url.startswith("https://api.sejm.gov.pl/"):
+        raise ContributionError(f"unexpected source URL: {source_url!r}")
+    if term not in {"9", "10"}:
+        raise ContributionError(f"unexpected post-2022 parliamentary term: {term!r}")
+
+    document_id = stable_document_id(row)
+    document = {
+        "id": document_id,
+        "text": text,
+        "source": SOURCE_NAME,
+        "added": added_date,
+        "created": created,
+        "token_count": len(encoder.encode_ordinary(text)),
+        "license": SOURCE_LICENSE,
+        "author": author,
+    }
+    attribution = {
+        "id": document_id,
+        "source_url": source_url,
+        "speaker": author,
+        "created": created,
+        "term": term,
+        "has_events": bool(row["has_events"]),
+        "word_count": int(row["word_count"]),
+        "char_count": int(row["char_count"]),
+        "provider": "Kancelaria Sejmu RP",
+        "source_release": f"hf://datasets/{SOURCE_REPOSITORY}@{SOURCE_RELEASE}",
+    }
+    return document, attribution
+
+
+def registry_source_end_date(registry: str, source_name: str) -> str:
+    pattern = re.compile(
+        rf'^\s{{4}}["\']{re.escape(source_name)}["\']\s*:\s*\{{'
+        rf'(?P<body>.*?)^\s{{4}}\}},?',
+        flags=re.MULTILINE | re.DOTALL,
+    )
+    match = pattern.search(registry)
+    if not match:
+        raise ContributionError(f"existing parliamentary source missing from registry: {source_name}")
+    dates = re.findall(r"\d{4}-\d{2}-\d{2}", match.group("body"))
+    if not dates:
+        raise ContributionError(f"source {source_name} has no documented date range")
+    return max(dates)
+
+
+def assert_temporal_novelty(registry: str, start_date: str) -> dict[str, str]:
+    threshold = dt.date.fromisoformat(start_date)
+    end_dates = {
+        name: registry_source_end_date(registry, name)
+        for name in ("parliamentary", "parlamint_pl")
+    }
+    overlapping = {
+        name: value for name, value in end_dates.items()
+        if dt.date.fromisoformat(value) >= threshold
+    }
+    if overlapping:
+        raise ContributionError(f"candidate date range overlaps registered sources: {overlapping}")
+    return end_dates
+
+
+def insert_source_registry_entry(registry: str, *, end_date: str) -> str:
+    if re.search(r'^\s{4}["\']sejm_api["\']\s*:', registry, flags=re.MULTILINE):
+        raise ContributionError("sejm_api already exists in the DynaWord source registry")
+    marker = '    "parlamint_pl": {'
+    if registry.count(marker) != 1:
+        raise ContributionError("cannot safely locate the existing parlamint_pl registry entry")
+    entry = (
+        '    "sejm_api": {\n'
+        '        "file_key": "sejm_api",\n'
+        '        "pretty": "Sejm API parliamentary speeches (2023 onward)",\n'
+        '        "license": "public-domain (official documents)",\n'
+        '        "license_spdx": "LicenseRef-Polish-Official-Documents",\n'
+        '        "traceable": "Official parliamentary materials excluded from copyright "\n'
+        '                     "under Polish Copyright Act art. 4(2); reusable under "\n'
+        '                     "the Polish Open Data Act arts. 2(12), 5, 14 and 17.",\n'
+        '        "upstream": "https://api.sejm.gov.pl/",\n'
+        '        "provenance": "Direct official Sejm API records, preserved with speaker "\n'
+        '                      "attribution and immutable PiotrSty/sejm-speeches-corpus "\n'
+        '                      "v1.0.1 source provenance.",\n'
+        '        "domain": "political/spoken",\n'
+        f'        "created": "{START_DATE}, {end_date}",\n'
+        '        "is_ocr": False,\n'
+        '    },\n'
+    )
+    updated = registry.replace(marker, entry + marker, 1)
+    ast.parse(updated)
+    return updated
+
+
+def legal_evidence(*, source_revision: str, target_revision: str) -> dict[str, Any]:
+    return {
+        "status": "reviewed-open-official-materials",
+        "source": SOURCE_NAME,
+        "dataset_record_license": SOURCE_LICENSE,
+        "hf_source_license_name": "polish-public-sector-open-statutory-reuse",
+        "provider": "Kancelaria Sejmu RP",
+        "official_source": SEJM_API,
+        "official_source_documentation": SEJM_API_DOCUMENTATION,
+        "copyright_basis": {
+            "act": "Polish Copyright and Related Rights Act",
+            "article": "4(2)",
+            "finding": "official documents and materials are excluded from copyright",
+            "url": COPYRIGHT_ACT,
+        },
+        "reuse_basis": {
+            "act": "Polish Open Data and Reuse of Public Sector Information Act",
+            "articles": ["2(12)", "5", "6", "14(1)", "15", "17"],
+            "url": OPEN_DATA_ACT,
+        },
+        "limitations": [
+            "privacy and personal-data exceptions",
+            "third-party rights and provider-specific conditions",
+            "no upstream Creative Commons grant is asserted",
+        ],
+        "pinned_source": f"hf://datasets/{SOURCE_REPOSITORY}@{source_revision}",
+        "pinned_target_base": f"hf://datasets/{TARGET_REPOSITORY}@{target_revision}",
+    }
+
+
+def write_json(path: pathlib.Path, payload: Any) -> None:
+    path.write_text(
+        json.dumps(payload, ensure_ascii=False, indent=2, sort_keys=True) + "\n",
+        encoding="utf-8",
+    )
+
+
+def source_datasheet(
+    *, stats: dict[str, Any], source_revision: str, target_revision: str,
+    prior_sources: dict[str, str], contribution_digest: str
+) -> str:
+    return f"""# sejm_api
+
+Contemporary official Polish Sejm speeches, supplementing existing parliamentary sources.
+
+## Dataset description
+
+- Source (upstream): {SEJM_API}
+- Source documentation: {SEJM_API_DOCUMENTATION}
+- Domain: political/spoken
+- Language: Polish (`pl`)
+- License: `{SOURCE_LICENSE}`
+- Created (range): {stats['created_min']}, {stats['created_max']}
+- Added: {stats['added']}
+- Contributor: Piotr Styła (`PiotrSty` on Hugging Face; `PiotrStyla` on GitHub).
+
+## Licensing — traceable basis
+
+Official parliamentary documents and materials are excluded from copyright by
+article 4(2) of the Polish Copyright Act: {COPYRIGHT_ACT}.
+
+Reuse of public-sector information is governed by articles 2(12), 5, 6, 14,
+15 and 17 of the Polish Open Data Act: {OPEN_DATA_ACT}.
+
+The per-document value intentionally matches the existing `parliamentary`
+source. No unverified upstream Creative Commons license is asserted.
+
+## Provenance and reproducibility
+
+- Official provider: Kancelaria Sejmu RP.
+- Immutable source release: `{SOURCE_REPOSITORY}@{SOURCE_RELEASE}`.
+- Pinned source commit: `{source_revision}`.
+- Reviewed DynaWord base commit: `{target_revision}`.
+- Rebuild: `python src/fetch_sejm_api.py --help`.
+- Source URLs and speech-level provenance are in `sejm_api.attribution.jsonl`.
+- Slayer contribution digest: `sha256:{contribution_digest}`.
+
+## Temporal novelty and deduplication
+
+`parliamentary` ends on `{prior_sources['parliamentary']}` and registered
+`parlamint_pl` ends on `{prior_sources['parlamint_pl']}`. Every contributed
+record is dated on or after `{START_DATE}`, so its date range overlaps neither
+source. Exact duplicate speech texts within the contribution are removed using
+SHA-1 fingerprints; this is not a claim of global cross-domain near-deduplication.
+
+## Statistics
+
+| Measure | Value |
+|---|---:|
+| Source rows inspected | {stats['read']:,} |
+| Rows before {START_DATE} | {stats['drop_before_start']:,} |
+| Exact duplicate texts removed | {stats['drop_dup']:,} |
+| Documents published | {stats['kept']:,} |
+| Characters | {stats['chars']:,} |
+| Tokens (`cl100k_base` proxy) | {stats['tokens']:,} |
+| Documents with speaker attribution | {stats['authors_with_value']:,} |
+
+Statistics are recomputed from the released Parquet file. The canonical schema
+is `id, text, source, added, created, token_count, license, author`.
+
+## Privacy and limitations
+
+The upstream release heuristically redacts email addresses, PESEL identifiers
+and unambiguous Polish telephone numbers. Public-official names and speech
+attribution remain. Regex redaction is not a guarantee of zero personal data.
+Downstream users must review applicable privacy, third-party and source terms.
+"""
+
+
+def ontology_manifest(
+    *, stats: dict[str, Any], source_revision: str, target_revision: str,
+    prior_sources: dict[str, str], parquet_digest: str, sidecar_digest: str,
+    legal_digest: str, actor: str, run_id: str, git_commit: str
+) -> dict[str, Any]:
+    config = {
+        "source_release": SOURCE_RELEASE,
+        "source_revision": source_revision,
+        "target_base_revision": target_revision,
+        "start_date": START_DATE,
+        "added": stats["added"],
+        "schema_fields": list(EXPECTED_FIELDS),
+        "tokenizer": "cl100k_base",
+        "exact_deduplication": "sha1(normalized_text)",
+        "registered_parliamentary_end_dates": prior_sources,
+    }
+    version_digest = canonical_sha256({
+        "source": source_revision,
+        "target": target_revision,
+        "configuration": config,
+        "parquet": parquet_digest,
+        "attribution": sidecar_digest,
+        "legal_evidence": legal_digest,
+        "protocol": sha256_file(pathlib.Path(__file__)),
+    })
+    version = f"slayer://version/dataset-source/sejm-api@sha256:{version_digest}"
+    evidence_ids = {
+        name: f"slayer://evidence/sejm-api-{name}@sha256:{version_digest[:20]}"
+        for name in ("record-counts", "temporal-novelty", "author-attribution", "legal-basis", "artifact-digests")
+    }
+    evidence = [
+        {"id": evidence_ids["record-counts"], "run_id": run_id,
+         "subject_version": version, "observation_type": "dataset_record_counts",
+         "payload": {key: stats[key] for key in ("read", "kept", "drop_before_start", "drop_dup", "tokens")}},
+        {"id": evidence_ids["temporal-novelty"], "run_id": run_id,
+         "subject_version": version, "observation_type": "registered_source_date_ranges",
+         "payload": {"candidate_min": stats["created_min"], "candidate_max": stats["created_max"],
+                     "existing_source_end_dates": prior_sources}},
+        {"id": evidence_ids["author-attribution"], "run_id": run_id,
+         "subject_version": version, "observation_type": "speaker_attribution_coverage",
+         "payload": {"documents": stats["kept"], "attributed_documents": stats["authors_with_value"]}},
+        {"id": evidence_ids["legal-basis"], "run_id": run_id,
+         "subject_version": version, "observation_type": "official_statutory_reuse_sources",
+         "payload": {"copyright_act": COPYRIGHT_ACT, "open_data_act": OPEN_DATA_ACT,
+                     "source_documentation": SEJM_API_DOCUMENTATION,
+                     "license": SOURCE_LICENSE, "legal_evidence_sha256": legal_digest}},
+        {"id": evidence_ids["artifact-digests"], "run_id": run_id,
+         "subject_version": version, "observation_type": "artifact_checksums",
+         "payload": {"parquet_sha256": parquet_digest, "attribution_sha256": sidecar_digest}},
+    ]
+    claims = [
+        {"id": f"slayer://claim/sejm-api-temporal-novelty@sha256:{version_digest[:20]}",
+         "statement": "Every contributed speech postdates both registered parliamentary source ranges.",
+         "falsification_condition": "Any contributed created date is <= either documented source end date.",
+         "scope": [version], "supported_by": [evidence_ids["temporal-novelty"]], "asserted_by": actor},
+        {"id": f"slayer://claim/sejm-api-full-speaker-attribution@sha256:{version_digest[:20]}",
+         "statement": "Every contributed document has a non-empty speech-speaker attribution.",
+         "falsification_condition": "Any contributed document has an empty author field.",
+         "scope": [version], "supported_by": [evidence_ids["author-attribution"]], "asserted_by": actor},
+        {"id": f"slayer://claim/sejm-api-open-official-materials@sha256:{version_digest[:20]}",
+         "statement": "The source contains official parliamentary materials with documented statutory reuse.",
+         "falsification_condition": "A record is not an official parliamentary material or an applicable statutory limitation defeats reuse.",
+         "scope": [version], "supported_by": [evidence_ids["legal-basis"]], "asserted_by": actor},
+    ]
+    return {
+        "schema_version": "slayer.ai/dataset-source-contribution/v1",
+        "object": {"id": "slayer://object/dataset-source/slayerlab-polish-dynaword-sejm-api",
+                   "kind": "dataset_source", "name": SOURCE_NAME},
+        "version": {"id": version, "digest": f"sha256:{version_digest}"},
+        "protocol": {"entrypoint": "python src/fetch_sejm_api.py", "git_commit": git_commit,
+                     "configuration": config},
+        "run": {"id": run_id, "actor_id": actor, "git_commit": git_commit,
+                "inputs": [{"role": "source", "version_id": f"hf://datasets/{SOURCE_REPOSITORY}@{source_revision}"},
+                           {"role": "target_base", "version_id": f"hf://datasets/{TARGET_REPOSITORY}@{target_revision}"}],
+                "outputs": [{"role": "dataset_source", "version_id": version}]},
+        "relations": [
+            {"source_version": version, "predicate": "DERIVED_FROM",
+             "target_version": f"hf://datasets/{SOURCE_REPOSITORY}@{source_revision}", "introduced_by_run": run_id},
+            {"source_version": version, "predicate": "COMPATIBLE_WITH",
+             "target_version": f"hf://datasets/{TARGET_REPOSITORY}@{target_revision}", "introduced_by_run": run_id},
+        ],
+        "evidence": evidence,
+        "claims": claims,
+        "claim_evidence": [
+            {"claim_id": claim["id"], "evidence_id": evidence_id, "relation": "SUPPORTS"}
+            for claim in claims for evidence_id in claim["supported_by"]
+        ],
+        "actors": [{"id": actor, "kind": "automation" if actor.startswith("github:") else "human"}],
+        "attestations": [
+            {"type": "schema_valid", "value": True, "fields": list(EXPECTED_FIELDS), "actor_id": actor},
+            {"type": "license_policy", "value": "open_public_sector_reuse", "actor_id": actor,
+             "supported_by": [evidence_ids["legal-basis"]]},
+            {"type": "temporal_overlap", "value": "none_for_registered_parliamentary_sources",
+             "actor_id": actor, "supported_by": [evidence_ids["temporal-novelty"]]},
+            {"type": "speaker_attribution", "value": "100_percent", "actor_id": actor,
+             "supported_by": [evidence_ids["author-attribution"]]},
+        ],
+    }
+
+
+def build_contribution(
+    source_dir: pathlib.Path,
+    registry_file: pathlib.Path,
+    output_dir: pathlib.Path,
+    *,
+    source_revision: str,
+    target_revision: str,
+    added_date: str,
+    actor: str,
+    run_id: str,
+    git_commit: str,
+    tests_file: pathlib.Path | None = None,
+) -> dict[str, Any]:
+    if not COMMIT_PATTERN.fullmatch(source_revision):
+        raise ContributionError("source revision must be an immutable 40-character Git commit")
+    if not COMMIT_PATTERN.fullmatch(target_revision):
+        raise ContributionError("target revision must be an immutable 40-character Git commit")
+    if not registry_file.is_file():
+        raise ContributionError(f"target source registry missing: {registry_file}")
+    registry = registry_file.read_text(encoding="utf-8")
+    previous_sources = assert_temporal_novelty(registry, START_DATE)
+
+    try:
+        import pyarrow as pa
+        import pyarrow.parquet as pq
+        import tiktoken
+    except ImportError as exc:
+        raise ContributionError("building the contribution requires pyarrow and tiktoken") from exc
+
+    schema = pa.schema([
+        ("id", pa.string()), ("text", pa.string()), ("source", pa.string()),
+        ("added", pa.string()), ("created", pa.string()), ("token_count", pa.int64()),
+        ("license", pa.string()), ("author", pa.string()),
+    ])
+    encoder = tiktoken.get_encoding("cl100k_base")
+    data_dir = output_dir / "data" / SOURCE_NAME
+    artifact_dir = output_dir / "artifacts"
+    src_dir = output_dir / "src"
+    for directory in (data_dir, artifact_dir, src_dir):
+        directory.mkdir(parents=True, exist_ok=True)
+
+    parquet_path = data_dir / f"{SOURCE_NAME}.parquet"
+    attribution_path = data_dir / f"{SOURCE_NAME}.attribution.jsonl"
+    counter: collections.Counter[str] = collections.Counter({
+        "read": 0, "kept": 0, "drop_before_start": 0, "drop_dup": 0,
+        "drop_short": 0, "drop_lang": 0, "drop_ocr": 0,
+        "chars": 0, "tokens": 0, "authors_with_value": 0,
+    })
+    years: collections.Counter[str] = collections.Counter()
+    terms: collections.Counter[str] = collections.Counter()
+    split_counts: collections.Counter[str] = collections.Counter()
+    fingerprints: set[str] = set()
+    created_dates: list[str] = []
+    batch_rows: list[dict[str, Any]] = []
+
+    def flush(writer: Any) -> None:
+        if batch_rows:
+            writer.write_table(pa.Table.from_pylist(batch_rows, schema=schema))
+            batch_rows.clear()
+
+    with pq.ParquetWriter(parquet_path, schema, compression="zstd") as writer:
+        with attribution_path.open("w", encoding="utf-8") as attribution_stream:
+            for split in ("train", "validation"):
+                input_path = source_dir / "data" / f"{split}.parquet"
+                if not input_path.is_file():
+                    raise ContributionError(f"pinned source split missing: {input_path}")
+                parquet_file = pq.ParquetFile(input_path)
+                if set(parquet_file.schema_arrow.names) != set(SOURCE_FIELDS):
+                    raise ContributionError(f"unexpected pinned source schema: {parquet_file.schema_arrow.names}")
+                for batch in parquet_file.iter_batches(batch_size=256):
+                    for row in batch.to_pylist():
+                        counter["read"] += 1
+                        normalized = normalize_source_row(
+                            row, start_date=START_DATE, added_date=added_date, encoder=encoder
+                        )
+                        if normalized is None:
+                            counter["drop_before_start"] += 1
+                            continue
+                        document, attribution = normalized
+                        fingerprint = text_fingerprint(document["text"])
+                        if fingerprint in fingerprints:
+                            counter["drop_dup"] += 1
+                            continue
+                        fingerprints.add(fingerprint)
+                        attribution["source_revision"] = source_revision
+                        attribution["source_split"] = split
+                        attribution_stream.write(
+                            json.dumps(attribution, ensure_ascii=False, sort_keys=True) + "\n"
+                        )
+                        batch_rows.append(document)
+                        counter["kept"] += 1
+                        counter["chars"] += len(document["text"])
+                        counter["tokens"] += document["token_count"]
+                        counter["authors_with_value"] += bool(document["author"])
+                        years[document["created"][:4]] += 1
+                        terms[attribution["term"]] += 1
+                        split_counts[split] += 1
+                        created_dates.append(document["created"])
+                        if len(batch_rows) >= 512:
+                            flush(writer)
+            flush(writer)
+
+    if not counter["kept"]:
+        raise ContributionError("no post-2022 Sejm speeches were available")
+    if counter["authors_with_value"] != counter["kept"]:
+        raise ContributionError("speaker attribution is not complete")
+
+    produced = pq.ParquetFile(parquet_path)
+    if tuple(produced.schema_arrow.names) != EXPECTED_FIELDS:
+        raise ContributionError(f"generated Parquet violates DynaWord schema: {produced.schema_arrow.names}")
+    if produced.metadata.num_rows != counter["kept"]:
+        raise ContributionError("Parquet row count does not match generated evidence")
+
+    stats: dict[str, Any] = {
+        **counter,
+        "license": SOURCE_LICENSE,
+        "licenses": {SOURCE_LICENSE: counter["kept"]},
+        "added": added_date,
+        "created_min": min(created_dates),
+        "created_max": max(created_dates),
+        "by_year": dict(sorted(years.items())),
+        "by_term": dict(sorted(terms.items())),
+        "by_source_split": dict(split_counts),
+        "stats_recomputed_from_parquet": True,
+        "source_revision": source_revision,
+        "target_base_revision": target_revision,
+    }
+    write_json(data_dir / f"{SOURCE_NAME}.stats.json", stats)
+    evidence_payload = legal_evidence(
+        source_revision=source_revision, target_revision=target_revision
+    )
+    legal_path = data_dir / f"{SOURCE_NAME}.license-evidence.json"
+    write_json(legal_path, evidence_payload)
+
+    manifest = ontology_manifest(
+        stats=stats, source_revision=source_revision, target_revision=target_revision,
+        prior_sources=previous_sources, parquet_digest=sha256_file(parquet_path),
+        sidecar_digest=sha256_file(attribution_path), legal_digest=sha256_file(legal_path),
+        actor=actor, run_id=run_id, git_commit=git_commit,
+    )
+    contribution_digest = str(manifest["version"]["digest"]).removeprefix("sha256:")
+    write_json(artifact_dir / "sejm_api_ontology_manifest.json", manifest)
+    (data_dir / f"{SOURCE_NAME}.md").write_text(
+        source_datasheet(
+            stats=stats, source_revision=source_revision, target_revision=target_revision,
+            prior_sources=previous_sources, contribution_digest=contribution_digest
+        ),
+        encoding="utf-8",
+    )
+    (data_dir / "NOTICE.md").write_text(
+        "# Source attribution\n\n"
+        "Official materials: Kancelaria Sejmu RP, API Sejmu — https://api.sejm.gov.pl/.\n\n"
+        "Speech attribution is preserved in `author`; the full source URL is in "
+        "`sejm_api.attribution.jsonl`.\n\n"
+        "Corpus preparation and contribution: Piotr Styła (Hugging Face: PiotrSty; "
+        "GitHub: PiotrStyla).\n\n"
+        "Reuse follows Polish Copyright Act art. 4(2) and the Polish Open Data Act. "
+        "No upstream Creative Commons grant is asserted.\n",
+        encoding="utf-8",
+    )
+    (src_dir / "sources.py").write_text(
+        insert_source_registry_entry(registry, end_date=stats["created_max"]),
+        encoding="utf-8",
+    )
+    shutil.copy2(pathlib.Path(__file__).resolve(), src_dir / "fetch_sejm_api.py")
+    if tests_file is not None:
+        if not tests_file.is_file():
+            raise ContributionError(f"contract test file missing: {tests_file}")
+        shutil.copy2(tests_file, src_dir / "test_sejm_api_contract.py")
+    return {"stats": stats, "manifest": manifest, "output": str(output_dir)}
+
+
+def build_parser() -> argparse.ArgumentParser:
+    parser = argparse.ArgumentParser(description=__doc__)
+    parser.add_argument("--source-dir", type=pathlib.Path, required=True)
+    parser.add_argument("--target-registry", type=pathlib.Path, required=True)
+    parser.add_argument("--output", type=pathlib.Path, required=True)
+    parser.add_argument("--source-revision", required=True)
+    parser.add_argument("--target-revision", required=True)
+    parser.add_argument("--added-date", default=dt.datetime.now(dt.timezone.utc).date().isoformat())
+    parser.add_argument("--actor", default="local-user")
+    parser.add_argument("--run-id", default="local-run")
+    parser.add_argument("--git-commit", default="uncommitted")
+    parser.add_argument("--tests-file", type=pathlib.Path)
+    return parser
+
+
+def main(argv: Iterable[str] | None = None) -> int:
+    args = build_parser().parse_args(list(argv) if argv is not None else None)
+    try:
+        result = build_contribution(
+            args.source_dir, args.target_registry, args.output,
+            source_revision=args.source_revision, target_revision=args.target_revision,
+            added_date=args.added_date, actor=args.actor, run_id=args.run_id,
+            git_commit=args.git_commit, tests_file=args.tests_file,
+        )
+    except (ContributionError, OSError) as exc:
+        print(f"error: {exc}", file=sys.stderr)
+        return 1
+    print(json.dumps({
+        "stats": result["stats"],
+        "version": result["manifest"]["version"],
+        "claims": len(result["manifest"]["claims"]),
+        "evidence": len(result["manifest"]["evidence"]),
+    }, ensure_ascii=False, indent=2, sort_keys=True))
+    return 0
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())

src/sources.py

@@ -1,389 +1,405 @@
-"""Source registry for Polish DynaWord.
-
-Each entry = one openly-licensed, *traceable* human-text source (paper 2508.02271,
-principle: open+traceable licensing). The `traceable` field documents WHY the
-license holds (not just "it's public domain") — e.g. statutory basis or upstream
-license — as required by the Dynaword guidelines.
-
-Provenance note: data is pulled from SpeakLeash's public redistribution
-(iDrive e2 bucket) of these upstream sources; SpeakLeash is credited as the
-intermediate aggregator, upstream license/attribution is preserved per source.
-"""
-
-# clean-6: passed the copyright review (2026-06-15). open_subtitles excluded
-# (derivative of copyrighted film dialogue — same lesson as Danish Gigaword).
-# Large cultural/academic sources require per-record rights metadata and should
-# be rebuilt from direct upstream/export scripts rather than blind SpeakLeash pulls.
-SOURCES = {
-    "wikipedia": {
-        "speakleash_key": "plwiki",
-        "pretty": "Polish Wikipedia",
-        "license": "CC-BY-SA-3.0",
-        "license_spdx": "CC-BY-SA-3.0",
-        "traceable": "Wikimedia dumps explicitly released under CC-BY-SA 3.0; "
-                     "attribution to contributors + share-alike preserved.",
-        "upstream": "https://dumps.wikimedia.org/plwiki/latest/",
-        "domain": "encyclopedic",
-        "created": "2001-01-15, 2026-06-14",
-        "is_ocr": False,
-    },
-    "wikisource": {
-        "speakleash_key": "plwikisource",
-        "pretty": "Polish Wikisource",
-        "license": "CC-BY-SA-3.0",
-        "license_spdx": "CC-BY-SA-3.0",
-        "traceable": "Wikimedia dumps under CC-BY-SA 3.0; underlying texts are "
-                     "public-domain works transcribed by the community.",
-        "upstream": "https://dumps.wikimedia.org/plwikisource/latest/",
-        "domain": "books/source-texts",
-        "created": "2005-01-01, 2026-06-14",
-        "is_ocr": False,
-    },
-    "wiktionary_examples": {
-        "file_key": "wiktionary_examples",
-        "pretty": "Polish Wiktionary usage examples",
-        "provenance": "Parsed directly from the official Wikimedia dump "
-                      "(plwiktionary-latest-pages-articles.xml.bz2); not routed "
-                      "through SpeakLeash. Usage-example sections of Polish-language "
-                      "entries extracted and grouped one document per headword.",
-        "license": "CC-BY-SA-3.0",
-        "license_spdx": "CC-BY-SA-3.0",
-        "traceable": "Wikimedia dumps explicitly released under CC-BY-SA 3.0; "
-                     "attribution to contributors + share-alike preserved. "
-                     "Derived subset: usage-example sections from Polish-language "
-                     "entries only, grouped one document per headword.",
-        "upstream": "https://dumps.wikimedia.org/plwiktionary/latest/",
-        "domain": "lexicographic",
-        "created": "2004-03-22, 2026-08-15",
-        "is_ocr": False,
-    },
-    "eurlex": {
-        "speakleash_key": "eurlex_corpus",
-        "pretty": "EUR-Lex (EU legal acts, Polish)",
-        "license": "CC-BY-4.0",
-        "license_spdx": "CC-BY-4.0",
-        "traceable": "EU documents reusable under Commission Decision 2011/833/EU; "
-                     "normative acts fall outside copyright (PL art. 4 pr. aut.). "
-                     "Reuse authorised with source acknowledgement.",
-        "upstream": "https://eur-lex.europa.eu",
-        "domain": "legal",
-        "created": "1952-01-01, 2024-12-31",
-        "is_ocr": False,
-    },
-    "parliamentary": {
-        "speakleash_key": "PPC_corpus",
-        "pretty": "Polish Parliamentary Corpus (Sejm/Senat)",
-        "license": "public-domain (official documents)",
-        "license_spdx": "CC-BY-4.0",
-        "traceable": "Parliamentary proceedings are official documents outside "
-                     "copyright (PL art. 4 pr. aut.); PPC redistributed by IPI PAN "
-                     "under CC-BY-4.0.",
-        "upstream": "http://clip.ipipan.waw.pl/PPC",
-        "domain": "political/spoken",
-        "created": "1991-01-01, 2019-12-31",
-        "is_ocr": False,
-    },
-    "parlamint_pl": {
-        "file_key": "parlamint_pl",
-        "pretty": "ParlaMint-PL (parliamentary debates, 2015-2022)",
-        "license": "CC-BY-4.0",
-        "license_spdx": "CC-BY-4.0",
-        "traceable": "ParlaMint 3.0 corpora released under CC-BY 4.0 (CLARIN.SI "
-                     "handle 11356/1486); parliamentary proceedings are also "
-                     "official documents (PL art. 4 pr. aut.).",
-        "upstream": "http://hdl.handle.net/11356/1486",
-        "provenance": "Fetched directly from the CLARIN.SI plain-text edition "
-                      "(ParlaMint-PL.tgz) by src/fetch_parlamint.py; one session "
-                      "transcript per document, utterance IDs stripped. Modern "
-                      "spoken register, complements the older PPC (1991-2019).",
-        "domain": "political/spoken",
-        "created": "2015-01-01, 2022-12-31",
-        "is_ocr": False,
-    },
-    "wolne_lektury": {
-        "speakleash_key": "wolne_lektury_corpus",
-        "pretty": "Wolne Lektury (school readings)",
-        "license": "CC-BY-SA-4.0 / Wolna Sztuka 1.3",
-        "license_spdx": "CC-BY-SA-4.0",
-        "traceable": "Wolne Lektury publishes under CC-BY-SA 4.0 or Free Art "
-                     "License; texts are public-domain classics + cleared works.",
-        "upstream": "https://wolnelektury.pl/api/books/",
-        "domain": "literature",
-        "created": "1500-01-01, 2024-12-31",
-        "is_ocr": False,
-    },
-    "wikinews": {
-        "file_key": "plwikinews",  # fetched from Wikimedia dumps, NOT via SpeakLeash
-        "pretty": "Polish Wikinews",
-        "license": "CC-BY-2.5",
-        "license_spdx": "CC-BY-2.5",
-        "traceable": "Wikinews content is released under CC-BY 2.5; attribution to "
-                     "contributors preserved.",
-        "upstream": "https://pl.wikinews.org/",
-        "provenance": "Fetched directly from the official Wikimedia dump "
-                      "(plwikinews-latest-pages-articles) by src/fetch_wikimedia.py; "
-                      "mainspace only, wikitext stripped via mwparserfromhell.",
-        "domain": "news",
-        "created": "2005-01-01, 2025-12-31",
-        "is_ocr": False,
-    },
-    "wikivoyage": {
-        "file_key": "plwikivoyage",
-        "pretty": "Polish Wikivoyage (travel guides)",
-        "license": "CC-BY-SA-3.0",
-        "license_spdx": "CC-BY-SA-3.0",
-        "traceable": "Wikivoyage content is released under CC-BY-SA 3.0; "
-                     "attribution + share-alike preserved.",
-        "upstream": "https://pl.wikivoyage.org/",
-        "provenance": "Fetched directly from the official Wikimedia dump "
-                      "(plwikivoyage-latest-pages-articles) by src/fetch_wikimedia.py; "
-                      "mainspace only, wikitext stripped via mwparserfromhell.",
-        "domain": "travel",
-        "created": "2012-01-01, 2025-12-31",
-        "is_ocr": False,
-    },
-    "wikibooks": {
-        "file_key": "plwikibooks",
-        "pretty": "Polish Wikibooks (open textbooks)",
-        "license": "CC-BY-SA-3.0",
-        "license_spdx": "CC-BY-SA-3.0",
-        "traceable": "Wikibooks content is released under CC-BY-SA 3.0; "
-                     "attribution + share-alike preserved.",
-        "upstream": "https://pl.wikibooks.org/",
-        "provenance": "Fetched directly from the official Wikimedia dump "
-                      "(plwikibooks-latest-pages-articles) by src/fetch_wikimedia.py; "
-                      "mainspace only, wikitext stripped via mwparserfromhell.",
-        "domain": "instructional",
-        "created": "2004-01-01, 2025-12-31",
-        "is_ocr": False,
-    },
-    "wikiquote": {
-        "file_key": "plwikiquote",
-        "pretty": "Polish Wikiquote (quotations)",
-        "license": "CC-BY-SA-3.0",
-        "license_spdx": "CC-BY-SA-3.0",
-        "traceable": "Wikiquote content is released under CC-BY-SA 3.0; "
-                     "attribution + share-alike preserved.",
-        "upstream": "https://pl.wikiquote.org/",
-        "provenance": "Fetched directly from the official Wikimedia dump "
-                      "(plwikiquote-latest-pages-articles) by src/fetch_wikimedia.py; "
-                      "mainspace only, wikitext stripped via mwparserfromhell.",
-        "domain": "quotations",
-        "created": "2005-01-01, 2025-12-31",
-        "is_ocr": False,
-    },
-    "eltec_pol": {
-        "file_key": "eltec_pol",
-        "pretty": "ELTeC-pol (European Literary Text Collection, Polish)",
-        "license": "CC-BY-4.0",
-        "license_spdx": "CC-BY-4.0",
-        "traceable": "ELTeC corpora are released under CC-BY 4.0 by the COST Action "
-                     "'Distant Reading for European Literary History' (CA16204).",
-        "upstream": "https://github.com/COST-ELTeC/ELTeC-pol",
-        "provenance": "Fetched directly from the COST-ELTeC/ELTeC-pol GitHub "
-                      "repository (level1 TEI) by src/fetch_eltec.py; reading text "
-                      "extracted from TEI <body> paragraphs.",
-        "domain": "literature",
-        "created": "1840-01-01, 1920-12-31",
-        "is_ocr": False,
-    },
-    "dziennik_ustaw": {
-        "file_key": "dziennik_ustaw",  # fetched directly, NOT via SpeakLeash
-        "pretty": "Dziennik Ustaw + Monitor Polski (Polish primary legislation)",
-        "license": "public-domain (official documents)",
-        "license_spdx": "CC0-1.0",
-        "traceable": "Normative acts and their official drafts are not subject to "
-                     "copyright (PL art. 4 ustawy o prawie autorskim). Published by "
-                     "the state; reuse unrestricted.",
-        "upstream": "https://api.sejm.gov.pl/eli/acts",
-        "provenance": "Fetched directly from the Sejm ELI API (text.html per act) "
-                      "by src/fetch_eli.py — a native source, not redistributed via "
-                      "SpeakLeash. Full provenance: each act's `meta.url` is its ELI "
-                      "address, resolvable on api.sejm.gov.pl.",
-        "domain": "legal",
-        "created": "1918-01-01, 2025-12-31",
-        "is_ocr": False,
-    },
-    "govpl": {
-        "file_key": "govpl",  # fetched directly from gov.pl, NOT via SpeakLeash
-        "pretty": "gov.pl — Polish government press releases",
-        "license": "CC-BY-SA-4.0",
-        "license_spdx": "CC-BY-SA-4.0",
-        "traceable": "All textual content on gov.pl is published under CC-BY-SA "
-                     "4.0 (site footer: \"Treści tekstowe publikowane w serwisie "
-                     "… są udostępniane na licencji CC BY-SA 4.0\"). Authored and "
-                     "hosted by the Polish government, which holds the right to "
-                     "license it — same open family as Polish Wikipedia.",
-        "upstream": "https://www.gov.pl/",
-        "provenance": "Ministry/agency press releases fetched directly from gov.pl "
-                      "(editor-content per article, HTML stripped) by "
-                      "src/fetch_govpl.py. Subsites + their non-uniform news-section "
-                      "paths are enumerated by src/discover_govpl.py into the "
-                      "committed manifest src/govpl_subsites.json (gov.pl has no "
-                      "sitemap/API). Each record's meta.url resolves on gov.pl.",
-        "domain": "government",
-        # actual min/max of article dates in the fetched corpus (90,124 dated).
-        "created": "2005-09-26, 2026-07-19",
-        "is_ocr": False,
-    },
-    "samorzad_gov_pl": {
-        "file_key": "samorzad_gov_pl",
-        "pretty": "samorzad.gov.pl — Polish public-sector institutions",
-        "license": "CC-BY-SA-4.0",
-        "license_spdx": "CC-BY-SA-4.0",
-        "traceable": "The shared samorzad.gov.pl platform footer publishes textual "
-                     "content under CC BY-SA 4.0. Every retained v0.1 source page "
-                     "referenced the shared footer script; audiovisual media and "
-                     "attachment bytes are not redistributed.",
-        "upstream": "https://huggingface.co/datasets/dawidmajewski/samorzad-gov-pl-articles",
-        "provenance": "Converted reproducibly from the published v0.1 source dataset "
-                      "by src/clean_samorzad_gov_pl.py. The source was collected "
-                      "directly from public samorzad.gov.pl pages across 246 local "
-                      "public institutions and one central platform tenant. "
-                      "Institution display names are frozen "
-                      "from each tenant homepage's og:site_name metadata and stored "
-                      "as DynaWord author values; discovered, fetched and attribution "
-                      "URLs plus license details are preserved in the sidecar.",
-        "domain": "local government, education, social services and culture",
-        "created": "2020-2026 for 21,892 dated records; 59,530 source records undated",
-        "is_ocr": False,
-        "custom_datasheet": True,
-    },
-    "biblioteka_nauki": {
-        "file_key": "biblioteka_nauki_pl_corpus",
-        "pretty": "Biblioteka Nauki",
-        "license": "per-record upstream license",
-        "license_spdx": "MIXED",
-        "traceable": "Documents are accepted only when the direct upstream record "
-                     "exposes a reusable license. The parquet carries the "
-                     "per-document `license` and `author` fields from the upstream "
-                     "metadata collected by the source-specific rebuild script.",
-        "upstream": "https://bibliotekanauki.pl/",
-        "provenance": "Fetched directly from Biblioteka Nauki via the contributor "
-                      "rebuild script, not from the SpeakLeash redistribution. "
-                      "License and author metadata are checked document by document "
-                      "before normalization into the DynaWord schema.",
-        "domain": "academic",
-        "created": "unknown",
-        "is_ocr": False,
-    },
-    "europeana": {
-        # Direct rebuild output from fetch_europeana.py, never the raw
-        # SpeakLeash Europeana aggregate.
-        "file_key": "europeana",
-        "pretty": "Europeana Polish records",
-        "license": "per-record public-domain/open rights statement",
-        "license_spdx": "MIXED",
-        "traceable": "Documents are accepted only with per-record Europeana rights "
-                     "metadata classified as public-domain/open. Public-domain "
-                     "status is jurisdiction-sensitive; downstream users must "
-                     "check their local legal requirements.",
-        "upstream": "https://www.europeana.eu/",
-        "provenance": "Fetched directly from Europeana via the contributor rebuild "
-                      "script, preserving per-record rights and creator metadata. "
-                      "The raw SpeakLeash aggregate remains insufficient because "
-                      "it does not carry enough rights evidence for release.",
-        "domain": "cultural heritage",
-        "created": "unknown",
-        "is_ocr": True,
-        "legal_note": "Europeana public-domain statements are primarily evaluated "
-                      "for Poland/EU. For US reuse, records created/published "
-                      "before 1929 are the conservative release slice; later "
-                      "records should remain separately labeled or held until "
-                      "legal review confirms their US status.",
-    },
-    "nkjp1m": {
-        "file_key": "nkjp1m",
-        "pretty": "The manually annotated 1-million word subcorpus of the National Corpus of Polish",
-        "license": "CC-BY",
-        "license_spdx": "CC-BY-4.0",
-        "traceable": "The NKJP download page (clip.ipipan.waw.pl) states the manually annotated 1-million-word subcorpus (Podkorpus Milionowy NKJP 1.2) is available under a CC-BY licence; attribution to the NKJP Consortium (IPI PAN) preserved. The page states 'CC-BY' with no version, normalized to CC-BY-4.0 for SPDX. The CC-BY licence covers the corpus text; NKJP's separate tools are GPL and are not included here.",
-        "upstream": "https://clip.ipipan.waw.pl/NationalCorpusOfPolish",
-        "provenance": "Downloaded the IPI PAN tarball (NKJP-PodkorpusMilionowy-1.2.tar.gz) directly by src/fetch_njkp.py, one row per TEI <div> passage (its <ab> paragraphs joined by newlines, ellipsis markers stripped). The same minimal gates as build_dynaword.py are applied per passage (drop < 200 chars, drop non-Polish by diacritic ratio, exact sha1 dedup; the OCR gate is inapplicable). Per-document 'created' is the sample's TEI publication date (<date type=\"published\">) where the header records one. Normalized into the DynaWord schema; cl100k token counts via tiktoken (encode_ordinary), and the stats are recomputed from the written parquet.",
-        "domain": "mixed (balanced reference corpus)",
-        "created": "1957-2008 (recorded for 6,581 of 18,381 documents; per-document in the created column)",
-        "is_ocr": False,
-    },
-    "european_hplt_v3_pl": {
-        "file_key": "european_hplt_v3_pl",
-        "pretty": "HPLT v3.0 Polish (web, top WDS bins 10-5)",
-        "license": "CC0-1.0",
-        "license_spdx": "CC0-1.0",
-        "traceable": "HPLT v3.0 Terms of Use license the data packaging under CC0-1.0 "
-                     "(hplt-project.org/datasets/v3.0; HF card HPLT/HPLT3.0). HPLT does not "
-                     "own the underlying web text; notice-and-takedown applies and downstream "
-                     "legal/provenance review remains the user's responsibility.",
-        "upstream": "https://data.hplt-project.org/three/sorted/pol_Latn/",
-        "provenance": "Fetched directly from the HPLT v3 distribution (pol_Latn shards "
-                      "10_1, 9_1-9_4, 8_1-8_4, 7_1-7_4, 6_1-6_2, 5_1-5_2 [WDS 10 down to 5]) by "
-                      "src/clean_hplt_v3.py + run_pipeline.py, NOT via SpeakLeash. Filtered: "
-                      "lang=pol_Latn + prob>=0.80, MT-prob<0.20, register in ID/OP/HI/IN/NA, "
-                      "min 400 chars / 80 words, boilerplate/adult/legalish drop, length cap "
-                      "120k chars, CJK-mojibake drop, wikipedia/wikisource/wikimedia + file-host "
-                      "domains excluded, per-domain cap. Phone->[Telefon] / email+national-ID->[PII] "
-                      "PII-scrub (v12b, independent dual-lens verify). Token counts via tiktoken cl100k.",
-        "domain": "web",
-        "created": "2012-01-01, 2024-12-31",
-        "is_ocr": False,
-        "legal_note": "Web-crawl derived: accept_after_web_review. HPLT is globally "
-                      "deduplicated upstream and WDS quality-sorted. Cross-source near/"
-                      "containment dedup vs the existing WDS-10+9 base shards was performed "
-                      "for the WDS 8-5 + extra-9 expansion: exact-dup=0, near-dup overlap="
-                      "0.0000% (byte-verified). Copyright recurs at all lengths in web crawl. "
-                      "Parity with the accepted european-hplt-v1 CC0 basis.",
-        "custom_datasheet": True,
-    },
-    "1000_novels": {
-        "speakleash_key": "1000_novels_corpus_CLARIN-PL",
-        "pretty": "1000 Novels Corpus (CLARIN-PL)",
-        "license": "CC-BY-4.0",
-        "license_spdx": "CC-BY-4.0",
-        "traceable": "The 1000 Novels Corpus is released under Creative Commons "
-                     "Attribution 4.0 International by CLARIN-PL / Wrocław University "
-                     "of Technology, with attribution to the corpus authors and "
-                     "maintainers.",
-        "upstream": "https://clarin-pl.eu/dspace/handle/11321/312",
-        "domain": "literature",
-        "created": "unknown",
-        "is_ocr": False,
-        # Datasheet is contributor-committed (added 2026-07-02); skip regeneration
-        # so the global ADDED stamp does not overwrite the real add date.
-        "custom_datasheet": True,
-    },
-    "global_voices": {
-        # Data contributed directly (PR #7): no in-repo fetch/build script and a
-        # hand-authored datasheet. Registered for the source table + release totals;
-        # the datasheet stays contributor-owned via custom_datasheet.
-        "file_key": "global_voices",
-        "pretty": "Global Voices Polish",
-        "license": "CC-BY-3.0",
-        "license_spdx": "CC-BY-3.0",
-        "traceable": "CC BY 3.0 verified from the article-level license link published "
-                     "with each retained Global Voices article; each record carries "
-                     "CC-BY-3.0 metadata and per-document author/translator attribution "
-                     "in global_voices.attribution.jsonl.",
-        "upstream": "https://pl.globalvoices.org/",
-        "domain": "civic media, news and public-interest journalism",
-        "created": "2008-11-04, 2023-05-24",
-        "is_ocr": False,
-        "custom_datasheet": True,
-    },
-}
-
-ADDED = "2026-07-19"
-EXCLUDED = {
-    "open_subtitles_corpus": "Derivative of copyrighted film/TV dialogue; "
-        "OpenSubtitles uploads largely unlicensed. Same copyright lesson as "
-        "Danish Gigaword's OpenSubtitles (paper 2508.02271). Not openly licensed.",
-    "europeana_eu_pl_corpus_raw_speakleash": "Aggregated items with mixed "
-        "per-record rights (PD / CC-BY-NC / rights-reserved). The raw "
-        "SpeakLeash redistribution is excluded; only a direct rebuild preserving "
-        "per-record rights metadata may be included.",
-    "1000_novels_corpus_CLARIN-PL": "CC-BY-4.0 label, but 'novels' likely include "
-        "in-copyright contemporary works; verify titles/years on CLARIN handle "
-        "11321/312 before inclusion.",
-    "project_gutenberg_pl_corpus": "Only 31 PL books (4.3MB) — PG is ~99% English; "
-        "Polish PD literature already covered by wolne_lektury + wikisource (so "
-        "near-redundant after dedup). Dropped to avoid the PD-in-EU per-work check "
-        "(PG claims PD-in-US only) for negligible token gain.",
-}
+"""Source registry for Polish DynaWord.
+
+Each entry = one openly-licensed, *traceable* human-text source (paper 2508.02271,
+principle: open+traceable licensing). The `traceable` field documents WHY the
+license holds (not just "it's public domain") — e.g. statutory basis or upstream
+license — as required by the Dynaword guidelines.
+
+Provenance note: data is pulled from SpeakLeash's public redistribution
+(iDrive e2 bucket) of these upstream sources; SpeakLeash is credited as the
+intermediate aggregator, upstream license/attribution is preserved per source.
+"""
+
+# clean-6: passed the copyright review (2026-06-15). open_subtitles excluded
+# (derivative of copyrighted film dialogue — same lesson as Danish Gigaword).
+# Large cultural/academic sources require per-record rights metadata and should
+# be rebuilt from direct upstream/export scripts rather than blind SpeakLeash pulls.
+SOURCES = {
+    "wikipedia": {
+        "speakleash_key": "plwiki",
+        "pretty": "Polish Wikipedia",
+        "license": "CC-BY-SA-3.0",
+        "license_spdx": "CC-BY-SA-3.0",
+        "traceable": "Wikimedia dumps explicitly released under CC-BY-SA 3.0; "
+                     "attribution to contributors + share-alike preserved.",
+        "upstream": "https://dumps.wikimedia.org/plwiki/latest/",
+        "domain": "encyclopedic",
+        "created": "2001-01-15, 2026-06-14",
+        "is_ocr": False,
+    },
+    "wikisource": {
+        "speakleash_key": "plwikisource",
+        "pretty": "Polish Wikisource",
+        "license": "CC-BY-SA-3.0",
+        "license_spdx": "CC-BY-SA-3.0",
+        "traceable": "Wikimedia dumps under CC-BY-SA 3.0; underlying texts are "
+                     "public-domain works transcribed by the community.",
+        "upstream": "https://dumps.wikimedia.org/plwikisource/latest/",
+        "domain": "books/source-texts",
+        "created": "2005-01-01, 2026-06-14",
+        "is_ocr": False,
+    },
+    "wiktionary_examples": {
+        "file_key": "wiktionary_examples",
+        "pretty": "Polish Wiktionary usage examples",
+        "provenance": "Parsed directly from the official Wikimedia dump "
+                      "(plwiktionary-latest-pages-articles.xml.bz2); not routed "
+                      "through SpeakLeash. Usage-example sections of Polish-language "
+                      "entries extracted and grouped one document per headword.",
+        "license": "CC-BY-SA-3.0",
+        "license_spdx": "CC-BY-SA-3.0",
+        "traceable": "Wikimedia dumps explicitly released under CC-BY-SA 3.0; "
+                     "attribution to contributors + share-alike preserved. "
+                     "Derived subset: usage-example sections from Polish-language "
+                     "entries only, grouped one document per headword.",
+        "upstream": "https://dumps.wikimedia.org/plwiktionary/latest/",
+        "domain": "lexicographic",
+        "created": "2004-03-22, 2026-08-15",
+        "is_ocr": False,
+    },
+    "eurlex": {
+        "speakleash_key": "eurlex_corpus",
+        "pretty": "EUR-Lex (EU legal acts, Polish)",
+        "license": "CC-BY-4.0",
+        "license_spdx": "CC-BY-4.0",
+        "traceable": "EU documents reusable under Commission Decision 2011/833/EU; "
+                     "normative acts fall outside copyright (PL art. 4 pr. aut.). "
+                     "Reuse authorised with source acknowledgement.",
+        "upstream": "https://eur-lex.europa.eu",
+        "domain": "legal",
+        "created": "1952-01-01, 2024-12-31",
+        "is_ocr": False,
+    },
+    "parliamentary": {
+        "speakleash_key": "PPC_corpus",
+        "pretty": "Polish Parliamentary Corpus (Sejm/Senat)",
+        "license": "public-domain (official documents)",
+        "license_spdx": "CC-BY-4.0",
+        "traceable": "Parliamentary proceedings are official documents outside "
+                     "copyright (PL art. 4 pr. aut.); PPC redistributed by IPI PAN "
+                     "under CC-BY-4.0.",
+        "upstream": "http://clip.ipipan.waw.pl/PPC",
+        "domain": "political/spoken",
+        "created": "1991-01-01, 2019-12-31",
+        "is_ocr": False,
+    },
+    "sejm_api": {
+        "file_key": "sejm_api",
+        "pretty": "Sejm API parliamentary speeches (2023 onward)",
+        "license": "public-domain (official documents)",
+        "license_spdx": "LicenseRef-Polish-Official-Documents",
+        "traceable": "Official parliamentary materials excluded from copyright "
+                     "under Polish Copyright Act art. 4(2); reusable under "
+                     "the Polish Open Data Act arts. 2(12), 5, 14 and 17.",
+        "upstream": "https://api.sejm.gov.pl/",
+        "provenance": "Direct official Sejm API records, preserved with speaker "
+                      "attribution and immutable PiotrSty/sejm-speeches-corpus "
+                      "v1.0.1 source provenance.",
+        "domain": "political/spoken",
+        "created": "2023-01-01, 2026-07-03",
+        "is_ocr": False,
+    },
+    "parlamint_pl": {
+        "file_key": "parlamint_pl",
+        "pretty": "ParlaMint-PL (parliamentary debates, 2015-2022)",
+        "license": "CC-BY-4.0",
+        "license_spdx": "CC-BY-4.0",
+        "traceable": "ParlaMint 3.0 corpora released under CC-BY 4.0 (CLARIN.SI "
+                     "handle 11356/1486); parliamentary proceedings are also "
+                     "official documents (PL art. 4 pr. aut.).",
+        "upstream": "http://hdl.handle.net/11356/1486",
+        "provenance": "Fetched directly from the CLARIN.SI plain-text edition "
+                      "(ParlaMint-PL.tgz) by src/fetch_parlamint.py; one session "
+                      "transcript per document, utterance IDs stripped. Modern "
+                      "spoken register, complements the older PPC (1991-2019).",
+        "domain": "political/spoken",
+        "created": "2015-01-01, 2022-12-31",
+        "is_ocr": False,
+    },
+    "wolne_lektury": {
+        "speakleash_key": "wolne_lektury_corpus",
+        "pretty": "Wolne Lektury (school readings)",
+        "license": "CC-BY-SA-4.0 / Wolna Sztuka 1.3",
+        "license_spdx": "CC-BY-SA-4.0",
+        "traceable": "Wolne Lektury publishes under CC-BY-SA 4.0 or Free Art "
+                     "License; texts are public-domain classics + cleared works.",
+        "upstream": "https://wolnelektury.pl/api/books/",
+        "domain": "literature",
+        "created": "1500-01-01, 2024-12-31",
+        "is_ocr": False,
+    },
+    "wikinews": {
+        "file_key": "plwikinews",  # fetched from Wikimedia dumps, NOT via SpeakLeash
+        "pretty": "Polish Wikinews",
+        "license": "CC-BY-2.5",
+        "license_spdx": "CC-BY-2.5",
+        "traceable": "Wikinews content is released under CC-BY 2.5; attribution to "
+                     "contributors preserved.",
+        "upstream": "https://pl.wikinews.org/",
+        "provenance": "Fetched directly from the official Wikimedia dump "
+                      "(plwikinews-latest-pages-articles) by src/fetch_wikimedia.py; "
+                      "mainspace only, wikitext stripped via mwparserfromhell.",
+        "domain": "news",
+        "created": "2005-01-01, 2025-12-31",
+        "is_ocr": False,
+    },
+    "wikivoyage": {
+        "file_key": "plwikivoyage",
+        "pretty": "Polish Wikivoyage (travel guides)",
+        "license": "CC-BY-SA-3.0",
+        "license_spdx": "CC-BY-SA-3.0",
+        "traceable": "Wikivoyage content is released under CC-BY-SA 3.0; "
+                     "attribution + share-alike preserved.",
+        "upstream": "https://pl.wikivoyage.org/",
+        "provenance": "Fetched directly from the official Wikimedia dump "
+                      "(plwikivoyage-latest-pages-articles) by src/fetch_wikimedia.py; "
+                      "mainspace only, wikitext stripped via mwparserfromhell.",
+        "domain": "travel",
+        "created": "2012-01-01, 2025-12-31",
+        "is_ocr": False,
+    },
+    "wikibooks": {
+        "file_key": "plwikibooks",
+        "pretty": "Polish Wikibooks (open textbooks)",
+        "license": "CC-BY-SA-3.0",
+        "license_spdx": "CC-BY-SA-3.0",
+        "traceable": "Wikibooks content is released under CC-BY-SA 3.0; "
+                     "attribution + share-alike preserved.",
+        "upstream": "https://pl.wikibooks.org/",
+        "provenance": "Fetched directly from the official Wikimedia dump "
+                      "(plwikibooks-latest-pages-articles) by src/fetch_wikimedia.py; "
+                      "mainspace only, wikitext stripped via mwparserfromhell.",
+        "domain": "instructional",
+        "created": "2004-01-01, 2025-12-31",
+        "is_ocr": False,
+    },
+    "wikiquote": {
+        "file_key": "plwikiquote",
+        "pretty": "Polish Wikiquote (quotations)",
+        "license": "CC-BY-SA-3.0",
+        "license_spdx": "CC-BY-SA-3.0",
+        "traceable": "Wikiquote content is released under CC-BY-SA 3.0; "
+                     "attribution + share-alike preserved.",
+        "upstream": "https://pl.wikiquote.org/",
+        "provenance": "Fetched directly from the official Wikimedia dump "
+                      "(plwikiquote-latest-pages-articles) by src/fetch_wikimedia.py; "
+                      "mainspace only, wikitext stripped via mwparserfromhell.",
+        "domain": "quotations",
+        "created": "2005-01-01, 2025-12-31",
+        "is_ocr": False,
+    },
+    "eltec_pol": {
+        "file_key": "eltec_pol",
+        "pretty": "ELTeC-pol (European Literary Text Collection, Polish)",
+        "license": "CC-BY-4.0",
+        "license_spdx": "CC-BY-4.0",
+        "traceable": "ELTeC corpora are released under CC-BY 4.0 by the COST Action "
+                     "'Distant Reading for European Literary History' (CA16204).",
+        "upstream": "https://github.com/COST-ELTeC/ELTeC-pol",
+        "provenance": "Fetched directly from the COST-ELTeC/ELTeC-pol GitHub "
+                      "repository (level1 TEI) by src/fetch_eltec.py; reading text "
+                      "extracted from TEI <body> paragraphs.",
+        "domain": "literature",
+        "created": "1840-01-01, 1920-12-31",
+        "is_ocr": False,
+    },
+    "dziennik_ustaw": {
+        "file_key": "dziennik_ustaw",  # fetched directly, NOT via SpeakLeash
+        "pretty": "Dziennik Ustaw + Monitor Polski (Polish primary legislation)",
+        "license": "public-domain (official documents)",
+        "license_spdx": "CC0-1.0",
+        "traceable": "Normative acts and their official drafts are not subject to "
+                     "copyright (PL art. 4 ustawy o prawie autorskim). Published by "
+                     "the state; reuse unrestricted.",
+        "upstream": "https://api.sejm.gov.pl/eli/acts",
+        "provenance": "Fetched directly from the Sejm ELI API (text.html per act) "
+                      "by src/fetch_eli.py — a native source, not redistributed via "
+                      "SpeakLeash. Full provenance: each act's `meta.url` is its ELI "
+                      "address, resolvable on api.sejm.gov.pl.",
+        "domain": "legal",
+        "created": "1918-01-01, 2025-12-31",
+        "is_ocr": False,
+    },
+    "govpl": {
+        "file_key": "govpl",  # fetched directly from gov.pl, NOT via SpeakLeash
+        "pretty": "gov.pl — Polish government press releases",
+        "license": "CC-BY-SA-4.0",
+        "license_spdx": "CC-BY-SA-4.0",
+        "traceable": "All textual content on gov.pl is published under CC-BY-SA "
+                     "4.0 (site footer: \"Treści tekstowe publikowane w serwisie "
+                     "… są udostępniane na licencji CC BY-SA 4.0\"). Authored and "
+                     "hosted by the Polish government, which holds the right to "
+                     "license it — same open family as Polish Wikipedia.",
+        "upstream": "https://www.gov.pl/",
+        "provenance": "Ministry/agency press releases fetched directly from gov.pl "
+                      "(editor-content per article, HTML stripped) by "
+                      "src/fetch_govpl.py. Subsites + their non-uniform news-section "
+                      "paths are enumerated by src/discover_govpl.py into the "
+                      "committed manifest src/govpl_subsites.json (gov.pl has no "
+                      "sitemap/API). Each record's meta.url resolves on gov.pl.",
+        "domain": "government",
+        # actual min/max of article dates in the fetched corpus (90,124 dated).
+        "created": "2005-09-26, 2026-07-19",
+        "is_ocr": False,
+    },
+    "samorzad_gov_pl": {
+        "file_key": "samorzad_gov_pl",
+        "pretty": "samorzad.gov.pl — Polish public-sector institutions",
+        "license": "CC-BY-SA-4.0",
+        "license_spdx": "CC-BY-SA-4.0",
+        "traceable": "The shared samorzad.gov.pl platform footer publishes textual "
+                     "content under CC BY-SA 4.0. Every retained v0.1 source page "
+                     "referenced the shared footer script; audiovisual media and "
+                     "attachment bytes are not redistributed.",
+        "upstream": "https://huggingface.co/datasets/dawidmajewski/samorzad-gov-pl-articles",
+        "provenance": "Converted reproducibly from the published v0.1 source dataset "
+                      "by src/clean_samorzad_gov_pl.py. The source was collected "
+                      "directly from public samorzad.gov.pl pages across 246 local "
+                      "public institutions and one central platform tenant. "
+                      "Institution display names are frozen "
+                      "from each tenant homepage's og:site_name metadata and stored "
+                      "as DynaWord author values; discovered, fetched and attribution "
+                      "URLs plus license details are preserved in the sidecar.",
+        "domain": "local government, education, social services and culture",
+        "created": "2020-2026 for 21,892 dated records; 59,530 source records undated",
+        "is_ocr": False,
+        "custom_datasheet": True,
+    },
+    "biblioteka_nauki": {
+        "file_key": "biblioteka_nauki_pl_corpus",
+        "pretty": "Biblioteka Nauki",
+        "license": "per-record upstream license",
+        "license_spdx": "MIXED",
+        "traceable": "Documents are accepted only when the direct upstream record "
+                     "exposes a reusable license. The parquet carries the "
+                     "per-document `license` and `author` fields from the upstream "
+                     "metadata collected by the source-specific rebuild script.",
+        "upstream": "https://bibliotekanauki.pl/",
+        "provenance": "Fetched directly from Biblioteka Nauki via the contributor "
+                      "rebuild script, not from the SpeakLeash redistribution. "
+                      "License and author metadata are checked document by document "
+                      "before normalization into the DynaWord schema.",
+        "domain": "academic",
+        "created": "unknown",
+        "is_ocr": False,
+    },
+    "europeana": {
+        # Direct rebuild output from fetch_europeana.py, never the raw
+        # SpeakLeash Europeana aggregate.
+        "file_key": "europeana",
+        "pretty": "Europeana Polish records",
+        "license": "per-record public-domain/open rights statement",
+        "license_spdx": "MIXED",
+        "traceable": "Documents are accepted only with per-record Europeana rights "
+                     "metadata classified as public-domain/open. Public-domain "
+                     "status is jurisdiction-sensitive; downstream users must "
+                     "check their local legal requirements.",
+        "upstream": "https://www.europeana.eu/",
+        "provenance": "Fetched directly from Europeana via the contributor rebuild "
+                      "script, preserving per-record rights and creator metadata. "
+                      "The raw SpeakLeash aggregate remains insufficient because "
+                      "it does not carry enough rights evidence for release.",
+        "domain": "cultural heritage",
+        "created": "unknown",
+        "is_ocr": True,
+        "legal_note": "Europeana public-domain statements are primarily evaluated "
+                      "for Poland/EU. For US reuse, records created/published "
+                      "before 1929 are the conservative release slice; later "
+                      "records should remain separately labeled or held until "
+                      "legal review confirms their US status.",
+    },
+    "nkjp1m": {
+        "file_key": "nkjp1m",
+        "pretty": "The manually annotated 1-million word subcorpus of the National Corpus of Polish",
+        "license": "CC-BY",
+        "license_spdx": "CC-BY-4.0",
+        "traceable": "The NKJP download page (clip.ipipan.waw.pl) states the manually annotated 1-million-word subcorpus (Podkorpus Milionowy NKJP 1.2) is available under a CC-BY licence; attribution to the NKJP Consortium (IPI PAN) preserved. The page states 'CC-BY' with no version, normalized to CC-BY-4.0 for SPDX. The CC-BY licence covers the corpus text; NKJP's separate tools are GPL and are not included here.",
+        "upstream": "https://clip.ipipan.waw.pl/NationalCorpusOfPolish",
+        "provenance": "Downloaded the IPI PAN tarball (NKJP-PodkorpusMilionowy-1.2.tar.gz) directly by src/fetch_njkp.py, one row per TEI <div> passage (its <ab> paragraphs joined by newlines, ellipsis markers stripped). The same minimal gates as build_dynaword.py are applied per passage (drop < 200 chars, drop non-Polish by diacritic ratio, exact sha1 dedup; the OCR gate is inapplicable). Per-document 'created' is the sample's TEI publication date (<date type=\"published\">) where the header records one. Normalized into the DynaWord schema; cl100k token counts via tiktoken (encode_ordinary), and the stats are recomputed from the written parquet.",
+        "domain": "mixed (balanced reference corpus)",
+        "created": "1957-2008 (recorded for 6,581 of 18,381 documents; per-document in the created column)",
+        "is_ocr": False,
+    },
+    "european_hplt_v3_pl": {
+        "file_key": "european_hplt_v3_pl",
+        "pretty": "HPLT v3.0 Polish (web, top WDS bins 10-5)",
+        "license": "CC0-1.0",
+        "license_spdx": "CC0-1.0",
+        "traceable": "HPLT v3.0 Terms of Use license the data packaging under CC0-1.0 "
+                     "(hplt-project.org/datasets/v3.0; HF card HPLT/HPLT3.0). HPLT does not "
+                     "own the underlying web text; notice-and-takedown applies and downstream "
+                     "legal/provenance review remains the user's responsibility.",
+        "upstream": "https://data.hplt-project.org/three/sorted/pol_Latn/",
+        "provenance": "Fetched directly from the HPLT v3 distribution (pol_Latn shards "
+                      "10_1, 9_1-9_4, 8_1-8_4, 7_1-7_4, 6_1-6_2, 5_1-5_2 [WDS 10 down to 5]) by "
+                      "src/clean_hplt_v3.py + run_pipeline.py, NOT via SpeakLeash. Filtered: "
+                      "lang=pol_Latn + prob>=0.80, MT-prob<0.20, register in ID/OP/HI/IN/NA, "
+                      "min 400 chars / 80 words, boilerplate/adult/legalish drop, length cap "
+                      "120k chars, CJK-mojibake drop, wikipedia/wikisource/wikimedia + file-host "
+                      "domains excluded, per-domain cap. Phone->[Telefon] / email+national-ID->[PII] "
+                      "PII-scrub (v12b, independent dual-lens verify). Token counts via tiktoken cl100k.",
+        "domain": "web",
+        "created": "2012-01-01, 2024-12-31",
+        "is_ocr": False,
+        "legal_note": "Web-crawl derived: accept_after_web_review. HPLT is globally "
+                      "deduplicated upstream and WDS quality-sorted. Cross-source near/"
+                      "containment dedup vs the existing WDS-10+9 base shards was performed "
+                      "for the WDS 8-5 + extra-9 expansion: exact-dup=0, near-dup overlap="
+                      "0.0000% (byte-verified). Copyright recurs at all lengths in web crawl. "
+                      "Parity with the accepted european-hplt-v1 CC0 basis.",
+        "custom_datasheet": True,
+    },
+    "1000_novels": {
+        "speakleash_key": "1000_novels_corpus_CLARIN-PL",
+        "pretty": "1000 Novels Corpus (CLARIN-PL)",
+        "license": "CC-BY-4.0",
+        "license_spdx": "CC-BY-4.0",
+        "traceable": "The 1000 Novels Corpus is released under Creative Commons "
+                     "Attribution 4.0 International by CLARIN-PL / Wrocław University "
+                     "of Technology, with attribution to the corpus authors and "
+                     "maintainers.",
+        "upstream": "https://clarin-pl.eu/dspace/handle/11321/312",
+        "domain": "literature",
+        "created": "unknown",
+        "is_ocr": False,
+        # Datasheet is contributor-committed (added 2026-07-02); skip regeneration
+        # so the global ADDED stamp does not overwrite the real add date.
+        "custom_datasheet": True,
+    },
+    "global_voices": {
+        # Data contributed directly (PR #7): no in-repo fetch/build script and a
+        # hand-authored datasheet. Registered for the source table + release totals;
+        # the datasheet stays contributor-owned via custom_datasheet.
+        "file_key": "global_voices",
+        "pretty": "Global Voices Polish",
+        "license": "CC-BY-3.0",
+        "license_spdx": "CC-BY-3.0",
+        "traceable": "CC BY 3.0 verified from the article-level license link published "
+                     "with each retained Global Voices article; each record carries "
+                     "CC-BY-3.0 metadata and per-document author/translator attribution "
+                     "in global_voices.attribution.jsonl.",
+        "upstream": "https://pl.globalvoices.org/",
+        "domain": "civic media, news and public-interest journalism",
+        "created": "2008-11-04, 2023-05-24",
+        "is_ocr": False,
+        "custom_datasheet": True,
+    },
+}
+
+ADDED = "2026-07-19"
+EXCLUDED = {
+    "open_subtitles_corpus": "Derivative of copyrighted film/TV dialogue; "
+        "OpenSubtitles uploads largely unlicensed. Same copyright lesson as "
+        "Danish Gigaword's OpenSubtitles (paper 2508.02271). Not openly licensed.",
+    "europeana_eu_pl_corpus_raw_speakleash": "Aggregated items with mixed "
+        "per-record rights (PD / CC-BY-NC / rights-reserved). The raw "
+        "SpeakLeash redistribution is excluded; only a direct rebuild preserving "
+        "per-record rights metadata may be included.",
+    "1000_novels_corpus_CLARIN-PL": "CC-BY-4.0 label, but 'novels' likely include "
+        "in-copyright contemporary works; verify titles/years on CLARIN handle "
+        "11321/312 before inclusion.",
+    "project_gutenberg_pl_corpus": "Only 31 PL books (4.3MB) — PG is ~99% English; "
+        "Polish PD literature already covered by wolne_lektury + wikisource (so "
+        "near-redundant after dedup). Dropped to avoid the PD-in-EU per-work check "
+        "(PG claims PD-in-US only) for negligible token gain.",
+}

src/test_sejm_api_contract.py

@@ -0,0 +1,193 @@
+from __future__ import annotations
+
+import ast
+import json
+import pathlib
+import sys
+import tempfile
+import unittest
+
+for candidate in (
+    pathlib.Path(__file__).resolve().parent,
+    pathlib.Path(__file__).resolve().parents[1] / "scripts",
+):
+    if str(candidate) not in sys.path:
+        sys.path.insert(0, str(candidate))
+
+try:
+    from fetch_sejm_api import (
+        ContributionError, EXPECTED_FIELDS, SOURCE_FIELDS, SOURCE_LICENSE, START_DATE,
+        assert_temporal_novelty, build_contribution, insert_source_registry_entry,
+        legal_evidence, normalize_source_row, stable_document_id, text_fingerprint,
+    )
+except ImportError:
+    from build_dynaword_sejm_api import (
+        ContributionError, EXPECTED_FIELDS, SOURCE_FIELDS, SOURCE_LICENSE, START_DATE,
+        assert_temporal_novelty, build_contribution, insert_source_registry_entry,
+        legal_evidence, normalize_source_row, stable_document_id, text_fingerprint,
+    )
+
+
+REGISTRY = '''SOURCES = {
+    "parliamentary": {
+        "created": "1991-01-01, 2019-12-31",
+        "license": "public-domain (official documents)",
+    },
+    "parlamint_pl": {
+        "created": "2015-01-01, 2022-12-31",
+        "license": "CC-BY-4.0",
+    },
+}
+'''
+
+
+class FakeEncoder:
+    def encode_ordinary(self, text: str) -> list[str]:
+        return text.split()
+
+
+def sample_row(index: int, *, date: str = "2024-05-10") -> dict[str, object]:
+    text = (
+        f"Panie Marszałku, Wysoka Izbo, wypowiedź numer {index}. "
+        + " ".join(f"słowo{number}" for number in range(65))
+    )
+    return {
+        "text": text,
+        "speaker": f"Poseł {index}",
+        "date": date,
+        "term": "10" if date >= "2023-11-13" else "9",
+        "source_url": f"https://api.sejm.gov.pl/sejm/term10/videos/{date}",
+        "char_count": len(text),
+        "word_count": len(text.split()),
+        "has_events": index % 2 == 0,
+    }
+
+
+class DynawordContractTests(unittest.TestCase):
+    def test_exact_dynaword_schema_and_speaker_attribution(self) -> None:
+        result = normalize_source_row(
+            sample_row(1), start_date=START_DATE,
+            added_date="2026-08-22", encoder=FakeEncoder()
+        )
+        self.assertIsNotNone(result)
+        document, attribution = result
+        self.assertEqual(tuple(document), EXPECTED_FIELDS)
+        self.assertEqual(document["source"], "sejm_api")
+        self.assertEqual(document["author"], "Poseł 1")
+        self.assertEqual(document["license"], SOURCE_LICENSE)
+        self.assertEqual(attribution["id"], document["id"])
+        self.assertTrue(attribution["source_url"].startswith("https://api.sejm.gov.pl/"))
+
+    def test_pre_2023_records_are_excluded(self) -> None:
+        self.assertIsNone(normalize_source_row(
+            sample_row(2, date="2022-12-31"), start_date=START_DATE,
+            added_date="2026-08-22", encoder=FakeEncoder()
+        ))
+
+    def test_first_day_after_parlamint_is_included(self) -> None:
+        self.assertIsNotNone(normalize_source_row(
+            sample_row(2, date="2023-01-01"), start_date=START_DATE,
+            added_date="2026-08-22", encoder=FakeEncoder()
+        ))
+
+    def test_document_identity_is_stable_and_source_specific(self) -> None:
+        row = sample_row(1)
+        self.assertEqual(stable_document_id(row), stable_document_id(dict(row)))
+        changed = dict(row, speaker="Inny poseł")
+        self.assertNotEqual(stable_document_id(row), stable_document_id(changed))
+        self.assertTrue(stable_document_id(row).startswith("sejm_api_"))
+
+    def test_exact_duplicate_fingerprint_depends_on_text_only(self) -> None:
+        left = sample_row(1)
+        right = dict(left, speaker="Inny mówca", date="2025-01-01")
+        self.assertEqual(text_fingerprint(str(left["text"])), text_fingerprint(str(right["text"])))
+
+    def test_missing_speaker_rejected(self) -> None:
+        with self.assertRaisesRegex(ContributionError, "speaker"):
+            normalize_source_row(
+                dict(sample_row(1), speaker=""), start_date=START_DATE,
+                added_date="2026-08-22", encoder=FakeEncoder()
+            )
+
+    def test_nonofficial_source_url_rejected(self) -> None:
+        with self.assertRaisesRegex(ContributionError, "source URL"):
+            normalize_source_row(
+                dict(sample_row(1), source_url="https://example.com/speech"),
+                start_date=START_DATE, added_date="2026-08-22", encoder=FakeEncoder()
+            )
+
+    def test_temporal_novelty_against_both_registered_sources(self) -> None:
+        self.assertEqual(assert_temporal_novelty(REGISTRY, START_DATE), {
+            "parliamentary": "2019-12-31",
+            "parlamint_pl": "2022-12-31",
+        })
+
+    def test_overlap_with_registered_parlamint_fails_closed(self) -> None:
+        with self.assertRaisesRegex(ContributionError, "overlaps"):
+            assert_temporal_novelty(REGISTRY, "2022-01-01")
+
+    def test_registry_entry_is_valid_and_preserves_existing_sources(self) -> None:
+        updated = insert_source_registry_entry(REGISTRY, end_date="2026-07-03")
+        ast.parse(updated)
+        self.assertIn('"sejm_api": {', updated)
+        self.assertIn('"parlamint_pl": {', updated)
+        self.assertIn('"created": "2023-01-01, 2026-07-03"', updated)
+
+    def test_legal_evidence_contains_official_sources_and_no_fake_cc(self) -> None:
+        evidence = legal_evidence(source_revision="a" * 40, target_revision="b" * 40)
+        self.assertEqual(evidence["dataset_record_license"], SOURCE_LICENSE)
+        self.assertEqual(evidence["copyright_basis"]["article"], "4(2)")
+        self.assertIn("no upstream Creative Commons grant is asserted", evidence["limitations"])
+
+
+class DynawordParquetIntegrationTests(unittest.TestCase):
+    def test_end_to_end_candidate_preserves_ontology_and_attribution(self) -> None:
+        try:
+            import pyarrow as pa
+            import pyarrow.parquet as pq
+            import tiktoken  # noqa: F401
+        except ImportError:
+            self.skipTest("pyarrow and tiktoken are installed on the release runner")
+
+        with tempfile.TemporaryDirectory() as temporary:
+            root = pathlib.Path(temporary)
+            source_dir = root / "source" / "data"
+            source_dir.mkdir(parents=True)
+            duplicate = sample_row(1)
+            train_rows = [
+                sample_row(0, date="2022-12-31"),
+                duplicate,
+                sample_row(2, date="2025-06-10"),
+            ]
+            validation_rows = [dict(duplicate, speaker="Duplikat mówcy")]
+            for name, rows in (("train", train_rows), ("validation", validation_rows)):
+                pq.write_table(pa.Table.from_pylist(rows), source_dir / f"{name}.parquet")
+            registry = root / "sources.py"
+            registry.write_text(REGISTRY, encoding="utf-8")
+            output = root / "result"
+            result = build_contribution(
+                root / "source", registry, output,
+                source_revision="a" * 40, target_revision="b" * 40,
+                added_date="2026-08-22", actor="github:PiotrStyla",
+                run_id="github-actions:1", git_commit="c" * 40,
+                tests_file=pathlib.Path(__file__),
+            )
+            self.assertEqual(result["stats"]["read"], 4)
+            self.assertEqual(result["stats"]["drop_before_start"], 1)
+            self.assertEqual(result["stats"]["drop_dup"], 1)
+            self.assertEqual(result["stats"]["kept"], 2)
+            self.assertEqual(result["stats"]["authors_with_value"], 2)
+            parquet = pq.read_table(output / "data" / "sejm_api" / "sejm_api.parquet")
+            self.assertEqual(tuple(parquet.column_names), EXPECTED_FIELDS)
+            self.assertEqual(parquet.num_rows, 2)
+            manifest = json.loads(
+                (output / "artifacts" / "sejm_api_ontology_manifest.json").read_text()
+            )
+            self.assertEqual(len(manifest["claims"]), 3)
+            self.assertEqual(len(manifest["evidence"]), 5)
+            self.assertTrue((output / "src" / "fetch_sejm_api.py").is_file())
+            self.assertTrue((output / "src" / "test_sejm_api_contract.py").is_file())
+
+
+if __name__ == "__main__":
+    unittest.main()