forge: citation_hash_class.py portable --repo default (fixes wrong-tree defect); + verifier

tools/citation_hash_class.py

@@ -84,7 +84,14 @@ USAGE
       [--json OUT] [--only mismatch|classless|bound|flags|all] [--min-len N]
       [--context] [--siblings] [--selftest]        # 19 fixtures
 """
-import argparse, collections, hashlib, json, re, subprocess, sys
+import argparse, collections, hashlib, json, os, re, subprocess, sys
+
+# Portable repo root: derived from this file's location, not a host literal.
+# Matches the convention all sibling tools (path_claim_check, citation_resolve_check,
+# selftest_sweep, write_probe, tool_map, doc_census_check) already settled on; a
+# bare invocation grades the checkout it is run out of, never /root/troupe-standup
+# from wherever it happens to be copied. (forge lane: Refactor -- wrong-tree defect)
+DEFAULT_REPO = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
 
 MIN_LEN_DEFAULT = 8
 PREFIX_LENS = (7, 8, 10, 12, 16, 20, 40, 64)
@@ -357,7 +364,7 @@ def selftest(repo):
 def main():
     ap = argparse.ArgumentParser(description=__doc__,
                                  formatter_class=argparse.RawDescriptionHelpFormatter)
-    ap.add_argument('--repo', default='/root/troupe-standup')
+    ap.add_argument('--repo', default=DEFAULT_REPO)
     ap.add_argument('--rev', default='HEAD')
     ap.add_argument('--corpus', nargs='*')
     ap.add_argument('--json')