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4309a12c67 fix(llm): word-boundary INN match, tighten edge cases (#1640 follow-up)
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Replace (?<!\d)/(?!\d) lookarounds on the digit block in _INN_RE with
(?<!\w)/(?!\w). The old (?<!\d) did not block alpha-prefixed tokens
(e.g. «ИНН ref7707083893»), and (?!\d) did not block alpha-suffixed
tokens (e.g. «ИНН 7707083893more»). \b is unsuitable here because
Python \w covers both letters and digits, so there is no \b boundary
between an alpha char and a digit char. The (?<!\w)/(?!\w) pair
correctly anchors the 10/12-digit INN block to non-word boundaries on
both sides. Context anchor and checksum gate from #1640 are unchanged.

Adds 6 regression tests covering: alpha-prefix, alpha-suffix,
embedded mid-token, 12-digit alpha-prefix, punctuation separator
(should match), and end-of-string (should match).
2026-06-17 21:24:59 +03:00
5c5be890ab fix(llm): INN redaction requires context/checksum, stop eating large numbers (#1640)
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_INN_RE now requires an explicit ИНН/inn keyword anchor (case-insensitive) within
~20 chars before a 10/12-digit block. Bare digit sequences without the keyword are
no longer candidates — eliminates false-positives on large monetary amounts such as
1 200 000 000 (which coincidentally passes the ФНС checksum). Checksum validation
is kept as a second gate to avoid redacting e.g. «ИНН 1234567890» with bad digits.

_inn_repl updated to use match.group(1) (digit-only capture group) instead of the
full match that now also includes the keyword prefix.

7 new regression tests in test_redaction.py: bare large numbers not redacted,
keyword-cued real INNs (10/12 digit) still redacted, bad-checksum + keyword left
intact, latin «inn:» accepted.
2026-06-17 20:41:39 +03:00
f12c03588d fix(llm): close §19 redaction regex gaps for bare phone / CAPS name / bare SNILS (#1207)
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`_PHONE_RE` требовал префикс +7/8 + хотя бы один разделитель → copy-paste форма
«79221234567»/«89221234567» (самая частая) уходила в OpenAI как есть. `_FULLNAME_RE`
требовал строчные после первой буквы → стандарт ЕГРН/паспортных выписок «ИВАНОВ
ИВАН ИВАНОВИЧ» не матчил. СНИЛС без разделителей не покрывался вообще (`_SNILS_RE`
ждёт формат «NNN-NNN-NNN NN»). Для chat-пути scrub — единственный барьер перед
OpenAI (SafePayload.text без allowlist'а), при llm_enabled=True PII покидает РФ
(нарушение §19/152-ФЗ).

Patch:
- _PHONE_BARE_RE: (?<!\d)[78]\d{10}(?!\d) — 11-значные с префиксом 7/8.
- _SNILS_BARE_RE: (?<!\d)\d{11}(?!\d) — любые 11-значные без разделителей.
- _FULLNAME_RE: альтернатива в каждом слове — Titlecase | CAPS-2+.
- Конфликт phone-bare vs SNILS-bare разрешён порядком в _PII_PATTERNS: phone
  раньше SNILS (7/8-префикс семантически точнее).
- INN (ровно 10/12) с SNILS-bare не пересекается по длине.

8 новых юнит-тестов покрывают все три дыры + конфликт-резолюцию. 24/24 redaction
тестов + 55/55 LLM-suite зелёные.

Closes #1207
2026-06-13 09:56:58 +05:00
4af7ba5a40 feat(llm): foundational LLM infra package with §19 redaction + deterministic fallback (#960)
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Optional external-OpenAI layer over the deterministic forecasting engine. Gated by
llm_enabled (default False) so prod makes no network calls until deliberately enabled.
Allowlist-first SafePayload contract + is_confidential hard-block + RU-PII regex scrub
(mandatory on the external path). Abstract LLMProvider seam (is_external) for a future
RU-hosted provider. Sync httpx core (Celery-friendly); tool/function-calling pass-through;
timeout + bounded 429/5xx retry + per-request call cap, all degrading to fallback.
Raw httpx (no openai SDK -> no pyproject/lock drift). 47 tests, ruff + mypy clean.

Refs #960
2026-06-08 15:44:16 +05:00