Add read-only PQRST evidence export from pinned entries

Assistant: codex
Assistant-Model: gpt-6-astra
Assistant-Session: 01a0e759-301a-78b1-bbc1-040ef094b12d

scripts/export-pqrst.py

@@ -0,0 +1,55 @@
+#!/usr/bin/env python3
+"""Export hall entry evidence as JSONL, without changing or grading seats.
+
+Usage: python3 export-pqrst.py /path/to/hall-of-helix [--revision HEAD]
+Only committed entries at the resolved revision are read. Every entry is emitted,
+including missing/malformed PQRST sections. Raw text is retained for review.
+"""
+import argparse
+import hashlib
+import json
+import re
+import subprocess
+from pathlib import Path
+
+
+def git(repo, *args):
+    return subprocess.check_output(['git', '-C', str(repo), *args])
+
+
+def export(repo, revision):
+    commit = git(repo, 'rev-parse', '--verify', revision + '^{commit}').decode().strip()
+    paths = git(repo, 'ls-tree', '-r', '--name-only', '-z', commit, '--', 'entries/')
+    for name in sorted(p.decode() for p in paths.split(b'\0') if p.endswith(b'.md')):
+        raw = git(repo, 'show', f'{commit}:{name}')
+        text = raw.decode('utf-8')
+        fm = re.match(r'\A---\n(.*?)\n---(?:\n|$)', text, re.S)
+        body = text[fm.end():] if fm else text
+        sections = re.findall(r'^## PQRST estimate\s*\n(.*?)(?=^## |\Z)', body, re.M | re.S | re.I)
+        blocks = []
+        for section in sections:
+            for match in re.finditer(r'^```[^\n]*\n(PQRST-Estimate\n.*?)^```[ \t]*$', section, re.M | re.S):
+                record = match.group(1)
+                fields = {}
+                for field in re.finditer(r'^([A-Za-z][A-Za-z ]*):[ \t]*(.*?)(?=^[A-Za-z][A-Za-z ]*:|\Z)', record, re.M | re.S):
+                    fields.setdefault(field.group(1), []).append(field.group(2).strip())
+                blocks.append({'raw': record, 'fields': fields})
+        yield {
+            'source_commit': commit, 'path': name,
+            'sha256': hashlib.sha256(raw).hexdigest(),
+            'frontmatter_raw': fm.group(1) if fm else None,
+            'pqrst_sections': sections, 'blocks': blocks,
+        }
+
+
+def main():
+    parser = argparse.ArgumentParser(description=__doc__)
+    parser.add_argument('repo', type=Path)
+    parser.add_argument('--revision', default='HEAD')
+    args = parser.parse_args()
+    for record in export(args.repo, args.revision):
+        print(json.dumps(record, ensure_ascii=False))
+
+
+if __name__ == '__main__':
+    main()