docs(import): add unresolved-names plan + worklog entry

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

docs/import-migration/04-unresolved-names-plan.md

@@ -0,0 +1,502 @@
+# Unresolved-Name Classification Implementation Plan
+
+> **For agentic workers:** REQUIRED SUB-SKILL: Use superpowers:subagent-driven-development (recommended) or superpowers:executing-plans to implement this plan task-by-task. Steps use checkbox (`- [ ]`) syntax for tracking.
+
+**Goal:** Add a focused `review/unresolved-names.csv` that isolates sender/receiver strings whose *name itself* is problematic (unknown/illegible, single-token, relational-only, collective/group, prose-in-name-column, or a genuine two-given-name pair), and fix the ambiguous-pair heuristic so a plain `First Surname` external person (e.g. `Mieze Schefold`) is no longer falsely flagged.
+
+**Architecture:** A pure `classify_name(raw, given_names)` function in `persons.py` returns a `NameClass`. `ResolutionContext` classifies every *unmatched* name and records the non-`RESOLVABLE` ones in `self.unresolved`. A runtime-built given-name set (register first names + a small config supplement) lets the classifier distinguish a two-given-name pair (`Ella Anita` → two people) from a first+surname single person (`Mieze Schefold`). The orchestrator writes the aggregated report and per-category stats, replacing the noisy `ambiguous-receivers.csv`.
+
+**Tech Stack:** Python 3.12, openpyxl, pytest — extends the existing `tools/import-normalizer/`.
+
+**Context:** This builds on the completed normalizer (PR #663). Run all tests with CWD = the tool dir, e.g. `cd tools/import-normalizer && .venv/bin/python -m pytest tests/test_X.py -v`. Reuse the existing venv at `tools/import-normalizer/.venv` (do NOT recreate it). Commit on the current branch `docs/import-migration` (never main, never push). Each commit message ends with a trailing `Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>` line.
+
+---
+
+## File Structure
+
+```
+tools/import-normalizer/
+├── config.py        # + RELATIONAL_TERMS, COLLECTIVE_TERMS, UNKNOWN_NAME_MARKERS, PROSE_MAX_LEN, EXTRA_GIVEN_NAMES
+├── persons.py       # + NameClass, classify_name(), build_given_names(); ResolutionContext gains given_names + self.unresolved
+├── normalize.py     # writes unresolved-names.csv (replaces ambiguous-receivers.csv) + per-category stats
+├── README.md        # + unresolved-names.csv row in the review-file table
+└── tests/
+    ├── test_config.py     # + name-table presence test
+    ├── test_persons.py    # + classify_name + build_given_names tests
+    ├── test_documents.py  # ambiguous test → unresolved test (+ resolvable-pair test)
+    └── test_normalize.py  # integration asserts unresolved-names.csv
+```
+
+---
+
+### Task 1: Config — name-classification tables
+
+**Files:**
+- Modify: `tools/import-normalizer/config.py`
+- Modify: `tools/import-normalizer/tests/test_config.py`
+
+- [ ] **Step 1: Add the failing test** to `tests/test_config.py`
+
+```python
+def test_name_classification_tables():
+    assert "tante" in config.RELATIONAL_TERMS
+    assert "familie" in config.COLLECTIVE_TERMS
+    assert "unbekannt" in config.UNKNOWN_NAME_MARKERS
+    assert config.PROSE_MAX_LEN >= 30
+    assert "anita" in config.EXTRA_GIVEN_NAMES
+```
+
+- [ ] **Step 2: Run to verify it fails**
+
+Run: `cd tools/import-normalizer && .venv/bin/python -m pytest tests/test_config.py::test_name_classification_tables -v && cd -`
+Expected: FAIL — `AttributeError: module 'config' has no attribute 'RELATIONAL_TERMS'`.
+
+- [ ] **Step 3: Implement** — append to `config.py` (after the existing tables, before/after `KNOWN_LAST_NAMES` — anywhere at module level)
+
+```python
+# --- Name classification (unresolved-name review) ---
+# Relational reference terms — a sender/receiver named by relation, not a proper name.
+RELATIONAL_TERMS = {
+    "tante", "onkel", "mutter", "vater", "oma", "opa", "großmutter", "grossmutter",
+    "großvater", "grossvater", "schwester", "bruder", "cousin", "cousine", "kusine",
+    "neffe", "nichte", "tochter", "sohn", "schwager", "schwägerin", "schwiegermutter",
+    "schwiegervater", "enkel", "enkelin", "vetter", "base", "witwe", "witwer",
+}
+# Collective/group terms — not a single person. Matched against alpha-only word tokens
+# (so "Fam.Cram" -> ["fam","cram"] matches "fam"), NOT as substrings/prefixes.
+COLLECTIVE_TERMS = {
+    "familie", "fam", "kinder", "eltern", "geschwister", "großeltern",
+    "grosseltern", "alle", "diverse", "div", "gebrüder", "gebr",
+}
+# Markers of an unknown/illegible name (the literal "?" is handled separately in code).
+# All long enough to be safe as SUBSTRING matches — do NOT add short tokens like "nn"
+# (it occurs inside real names: Hanni, Johanna, Anna).
+UNKNOWN_NAME_MARKERS = {"unbekannt", "unbek", "unleserlich", "unklar", "unsicher"}
+# A name-column value longer than this (chars) is treated as prose/description, not a name.
+PROSE_MAX_LEN = 40
+# Common given names that may appear in two-given-name pairs (e.g. "Ella Anita") but are not
+# in the family register. Only used to detect AMBIGUOUS_PAIR — extend as review surfaces more.
+EXTRA_GIVEN_NAMES = {
+    "ella", "anita", "kurt", "georg", "hanni", "mieze", "ellen", "leni", "klara",
+    "margret", "gustava", "emmy", "minna", "sophie", "helga", "raymonde", "augusta",
+}
+```
+
+- [ ] **Step 4: Run to verify it passes**
+
+Run: `cd tools/import-normalizer && .venv/bin/python -m pytest tests/test_config.py -v && cd -`
+Expected: PASS (all config tests).
+
+- [ ] **Step 5: Commit**
+
+```bash
+git add tools/import-normalizer/config.py tools/import-normalizer/tests/test_config.py
+git commit -m "feat(normalizer): config tables for name classification"
+```
+
+---
+
+### Task 2: `classify_name` + `NameClass`
+
+**Files:**
+- Modify: `tools/import-normalizer/persons.py`
+- Modify: `tools/import-normalizer/tests/test_persons.py`
+
+- [ ] **Step 1: Add failing tests** to `tests/test_persons.py`
+
+```python
+from persons import NameClass
+
+GIVEN = {"ella", "anita", "kurt", "georg", "clara", "eugenie"}
+
+def test_classify_unknown():
+    assert persons.classify_name("?", GIVEN) is NameClass.UNKNOWN
+    assert persons.classify_name("A. Kredell?", GIVEN) is NameClass.UNKNOWN
+    assert persons.classify_name("unbekannt", GIVEN) is NameClass.UNKNOWN
+
+def test_classify_prose():
+    assert persons.classify_name("Adressenliste v Clara Cram zur Kondolenz", GIVEN) is NameClass.PROSE
+    assert persons.classify_name("Clara de Gruyter(*1871)", GIVEN) is NameClass.PROSE  # digit
+    assert persons.classify_name('"Cramiade" Gedicht', GIVEN) is NameClass.PROSE        # quote
+
+def test_classify_collective():
+    assert persons.classify_name("Familie", GIVEN) is NameClass.COLLECTIVE
+    assert persons.classify_name("Fam.Cram", GIVEN) is NameClass.COLLECTIVE
+    assert persons.classify_name("Eltern Cram", GIVEN) is NameClass.COLLECTIVE
+    assert persons.classify_name("seine Kinder", GIVEN) is NameClass.COLLECTIVE
+
+def test_classify_relational():
+    assert persons.classify_name("Cousine Emmy Haniel", GIVEN) is NameClass.RELATIONAL
+    assert persons.classify_name("Schwester Hanni", GIVEN) is NameClass.RELATIONAL
+
+def test_classify_single_token():
+    assert persons.classify_name("Agnes", GIVEN) is NameClass.SINGLE_TOKEN
+    assert persons.classify_name("A.B.", GIVEN) is NameClass.SINGLE_TOKEN
+
+def test_classify_ambiguous_pair():
+    assert persons.classify_name("Ella Anita", GIVEN) is NameClass.AMBIGUOUS_PAIR
+    assert persons.classify_name("Kurt Georg", GIVEN) is NameClass.AMBIGUOUS_PAIR
+
+def test_classify_resolvable_single_person():
+    # first + surname (surname not a given name) -> one real person, NOT ambiguous
+    assert persons.classify_name("Mieze Schefold", GIVEN) is NameClass.RESOLVABLE
+    assert persons.classify_name("Adolf Butenandt", GIVEN) is NameClass.RESOLVABLE
+```
+
+- [ ] **Step 2: Run to verify it fails**
+
+Run: `cd tools/import-normalizer && .venv/bin/python -m pytest tests/test_persons.py -k classify -v && cd -`
+Expected: FAIL — `NameClass` / `classify_name` not defined.
+
+- [ ] **Step 3: Implement** — add to `persons.py`. Add `from enum import StrEnum` to the imports if not present, then add:
+
+```python
+class NameClass(StrEnum):
+    RESOLVABLE = "resolvable"
+    UNKNOWN = "unknown"
+    SINGLE_TOKEN = "single_token"
+    RELATIONAL = "relational"
+    COLLECTIVE = "collective"
+    PROSE = "prose"
+    AMBIGUOUS_PAIR = "ambiguous_pair"
+
+
+_QUOTE_CHARS = "\"'“”„‚‘’"
+
+
+def classify_name(raw: str, given_names: set[str]) -> NameClass:
+    """Classify a (post-split) sender/receiver string by why it may be unresolvable.
+
+    Precedence (first match wins): UNKNOWN -> PROSE -> COLLECTIVE -> RELATIONAL ->
+    SINGLE_TOKEN -> AMBIGUOUS_PAIR -> RESOLVABLE.
+    """
+    s = raw.strip()
+    if not s:
+        return NameClass.RESOLVABLE
+    low = s.lower()
+    tokens = s.split()
+    # alpha-only word tokens: "Fam.Cram" -> ["fam","cram"], so collective/relational terms
+    # are matched as whole words (no substring/prefix false positives like "Allerton").
+    alpha_words = re.findall(r"[a-zäöüß]+", low)
+    if "?" in s or any(m in low for m in config.UNKNOWN_NAME_MARKERS):
+        return NameClass.UNKNOWN
+    if (len(s) > config.PROSE_MAX_LEN or any(c.isdigit() for c in s)
+            or any(q in s for q in _QUOTE_CHARS) or len(tokens) > 3):
+        return NameClass.PROSE
+    if any(w in config.COLLECTIVE_TERMS for w in alpha_words):
+        return NameClass.COLLECTIVE
+    if any(w in config.RELATIONAL_TERMS for w in alpha_words):
+        return NameClass.RELATIONAL
+    if len(tokens) == 1:
+        return NameClass.SINGLE_TOKEN
+    if len(tokens) == 2 and all(_norm(t) in given_names for t in tokens):
+        return NameClass.AMBIGUOUS_PAIR
+    return NameClass.RESOLVABLE
+
+
+# Known limitation: a 4+-token name with no digits/quotes (e.g. "Anna von der Heide") is
+# classified PROSE. Such multi-particle names are rare here and usually resolve via the
+# register; if they surface in review, lower-priority than the real prose entries.
+```
+
+> Note: `_norm` already exists in `persons.py` (added in the alias-index task) and strips accents + lowercases. `classify_name` uses it so given-name matching is accent-insensitive.
+
+- [ ] **Step 4: Run to verify it passes**
+
+Run: `cd tools/import-normalizer && .venv/bin/python -m pytest tests/test_persons.py -v && cd -`
+Expected: PASS (all persons tests, including the 7 new classify tests).
+
+- [ ] **Step 5: Commit**
+
+```bash
+git add tools/import-normalizer/persons.py tools/import-normalizer/tests/test_persons.py
+git commit -m "feat(normalizer): classify_name + NameClass"
+```
+
+---
+
+### Task 3: `build_given_names`
+
+**Files:**
+- Modify: `tools/import-normalizer/persons.py`
+- Modify: `tools/import-normalizer/tests/test_persons.py`
+
+- [ ] **Step 1: Add failing test** to `tests/test_persons.py`
+
+```python
+def test_build_given_names():
+    people = persons.parse_register([
+        {"last_name": "de Gruyter", "first_name": "Eugenie"},
+        {"last_name": "Cram", "first_name": "Charlotte,Meta"},  # comma -> primary + extra given
+    ])
+    g = persons.build_given_names(people, {"Anita"})
+    assert "eugenie" in g
+    assert "charlotte" in g and "meta" in g   # primary + extra given names
+    assert "anita" in g                        # from the extra set, normalized
+    assert "schefold" not in g
+```
+
+- [ ] **Step 2: Run to verify it fails**
+
+Run: `cd tools/import-normalizer && .venv/bin/python -m pytest tests/test_persons.py::test_build_given_names -v && cd -`
+Expected: FAIL — `build_given_names` not defined.
+
+- [ ] **Step 3: Implement** — add to `persons.py`
+
+```python
+def build_given_names(register: list[Person], extra: set[str]) -> set[str]:
+    """Set of normalized given names from the register (first + extra given) plus a supplement.
+
+    Used by classify_name to tell a two-given-name pair (two people) from a first+surname.
+    """
+    names: set[str] = set()
+    for p in register:
+        if p.first_name:
+            names.add(_norm(p.first_name))
+        for g in p.extra_given_names:
+            names.add(_norm(g))
+    for e in extra:
+        names.add(_norm(e))
+    return names
+```
+
+- [ ] **Step 4: Run to verify it passes**
+
+Run: `cd tools/import-normalizer && .venv/bin/python -m pytest tests/test_persons.py -v && cd -`
+Expected: PASS.
+
+- [ ] **Step 5: Commit**
+
+```bash
+git add tools/import-normalizer/persons.py tools/import-normalizer/tests/test_persons.py
+git commit -m "feat(normalizer): build_given_names from register + supplement"
+```
+
+---
+
+### Task 4: Integrate — ResolutionContext records unresolved; orchestrator writes the report
+
+This task touches `persons.py`, `normalize.py`, and two test files together so the whole suite stays green in one commit (removing `ctx.ambiguous` requires updating its only consumer, `normalize.py`, in the same change).
+
+**Files:**
+- Modify: `tools/import-normalizer/persons.py` (ResolutionContext)
+- Modify: `tools/import-normalizer/normalize.py`
+- Modify: `tools/import-normalizer/tests/test_documents.py`
+- Modify: `tools/import-normalizer/tests/test_normalize.py`
+
+- [ ] **Step 1: Update the failing tests first**
+
+In `tests/test_documents.py`, **replace** the existing `test_ambiguous_space_pair_flagged_not_split` function entirely with these two functions:
+
+```python
+def test_ambiguous_pair_recorded_in_unresolved():
+    people = persons.parse_register([{"last_name": "de Gruyter", "first_name": "Walter"}])
+    ctx = persons.ResolutionContext(persons.AliasIndex(people), name_overrides={},
+                                    given_names={"ella", "anita"})
+    raw = documents.RawRow(source_row=7, index="C-0200", sender="", receivers="Ella Anita")
+    doc = documents.to_canonical(raw, ctx, date_overrides={})
+    assert len(doc.receiver_person_ids) == 1   # not split — one provisional
+    assert any(name == "Ella Anita" and cat == "ambiguous_pair" for name, cat, _ in ctx.unresolved)
+
+def test_resolvable_first_surname_pair_not_unresolved():
+    ctx = persons.ResolutionContext(persons.AliasIndex([]), name_overrides={},
+                                    given_names={"ella", "anita"})
+    ctx.resolve_one("Mieze Schefold", source_row=1)   # surname is not a given name
+    assert ctx.unresolved == []                        # RESOLVABLE -> not recorded
+```
+
+In `tests/test_normalize.py`, in the `_doc_wb` fixture, change the `C-0001` row's receiver from empty to `"?"` so the run produces an unresolved entry. Find the line that appends the `C-0001` row and set its `EmpfängerIn` cell to `"?"`. For example the row currently reads:
+
+```python
+    ws.append(["C-0001", "", "", "", "Hans Wittkopf", "", "Freitag 1919", "", "", ""])
+```
+
+change the 6th cell (EmpfängerIn) from `""` to `"?"`:
+
+```python
+    ws.append(["C-0001", "", "", "", "Hans Wittkopf", "?", "Freitag 1919", "", "", ""])
+```
+
+Then add these assertions inside `test_run_end_to_end`, right after the existing `assert (review_dir / "unparsed-dates.csv").exists()` line:
+
+```python
+    assert (out_dir / "canonical-documents.xlsx").exists()  # (keep existing asserts above)
+    assert (review_dir / "unresolved-names.csv").exists()
+    unresolved_text = (review_dir / "unresolved-names.csv").read_text(encoding="utf-8")
+    assert "unknown" in unresolved_text and "?" in unresolved_text   # the "?" receiver
+    assert not (review_dir / "ambiguous-receivers.csv").exists()      # replaced
+```
+
+- [ ] **Step 2: Run to verify they fail**
+
+Run: `cd tools/import-normalizer && .venv/bin/python -m pytest tests/test_documents.py tests/test_normalize.py -v && cd -`
+Expected: FAIL — `ResolutionContext` has no `given_names`/`unresolved`; `unresolved-names.csv` not written.
+
+- [ ] **Step 3a: Implement — `ResolutionContext` in `persons.py`**
+
+Replace the `ResolutionContext.__init__` body's two lines (`self.ambiguous` and add `given_names`) and the relevant methods. The new `__init__`:
+
+```python
+    def __init__(self, alias_index: AliasIndex, name_overrides: dict[str, str],
+                 given_names: set[str] | None = None):
+        self.index = alias_index
+        self.name_overrides = name_overrides
+        self.given_names = given_names or set()
+        self.provisional: dict[str, Person] = {}
+        self.unmatched: dict[str, list] = {}
+        self.unresolved: list[tuple] = []   # (raw_name, category, source_row) for non-RESOLVABLE names
+        self._raw_to_pid: dict[str, str] = {}
+        self.override_hits = 0
+```
+
+In `resolve_one`, the provisional branch must classify the name. Replace this existing block:
+
+```python
+        # provisional person (unmatched) — never reuse a register id
+        self.unmatched.setdefault(name, []).append(source_row)
+        if name in self._raw_to_pid:
+            return self._raw_to_pid[name], name, False
+```
+
+with:
+
+```python
+        # provisional person (unmatched) — never reuse a register id
+        self.unmatched.setdefault(name, []).append(source_row)
+        category = classify_name(name, self.given_names)
+        if category is not NameClass.RESOLVABLE:
+            self.unresolved.append((name, str(category), source_row))
+        if name in self._raw_to_pid:
+            return self._raw_to_pid[name], name, False
+```
+
+Replace the entire `resolve_receivers` method (the ambiguous detection now lives in `resolve_one` via `classify_name`):
+
+```python
+    def resolve_receivers(self, raw: str, source_row: int):
+        return [self.resolve_one(part, source_row) for part in split_receivers(raw)]
+```
+
+- [ ] **Step 3b: Implement — `normalize.py`**
+
+Find the line that builds the context:
+
+```python
+    ctx = persons.ResolutionContext(alias_index, name_overrides)
+```
+
+replace it with (build the given-name set from the register + config supplement):
+
+```python
+    given_names = persons.build_given_names(register, config.EXTRA_GIVEN_NAMES)
+    ctx = persons.ResolutionContext(alias_index, name_overrides, given_names=given_names)
+```
+
+Replace the `ambiguous-receivers.csv` write line:
+
+```python
+    writers.write_review_csv(review_dir / "ambiguous-receivers.csv", ["raw", "part", "source_row"], ctx.ambiguous)
+```
+
+with an aggregated unresolved-names report:
+
+```python
+    unresolved_agg: dict[tuple, list] = {}
+    for name, category, row in ctx.unresolved:
+        unresolved_agg.setdefault((category, name), []).append(row)
+    unresolved_rows = sorted(
+        ([cat, name, len(rows), " ".join(map(str, sorted(rows)[:5]))]
+         for (cat, name), rows in unresolved_agg.items()),
+        key=lambda r: (r[0], -r[2], r[1]))
+    writers.write_review_csv(review_dir / "unresolved-names.csv",
+                             ["category", "raw", "count", "example_rows"], unresolved_rows)
+```
+
+In the `stats` dict, replace the `"ambiguous_receivers"` line:
+
+```python
+        "ambiguous_receivers": len(ctx.ambiguous),
+```
+
+with a per-category breakdown:
+
+```python
+        "unresolved_name_occurrences": len(ctx.unresolved),
+        "unresolved_unknown": sum(1 for _, c, _ in ctx.unresolved if c == "unknown"),
+        "unresolved_single_token": sum(1 for _, c, _ in ctx.unresolved if c == "single_token"),
+        "unresolved_relational": sum(1 for _, c, _ in ctx.unresolved if c == "relational"),
+        "unresolved_collective": sum(1 for _, c, _ in ctx.unresolved if c == "collective"),
+        "unresolved_prose": sum(1 for _, c, _ in ctx.unresolved if c == "prose"),
+        "unresolved_ambiguous_pair": sum(1 for _, c, _ in ctx.unresolved if c == "ambiguous_pair"),
+```
+
+- [ ] **Step 4: Run the whole suite to verify green**
+
+Run: `cd tools/import-normalizer && .venv/bin/python -m pytest tests/ -q && cd -`
+Expected: PASS (all tests, no `ambiguous` references remain).
+
+Also grep to confirm no dangling references:
+Run: `grep -rn "ctx.ambiguous\|ambiguous-receivers\|ambiguous_receivers\|self.ambiguous" tools/import-normalizer/*.py`
+Expected: no matches.
+
+- [ ] **Step 5: Commit**
+
+```bash
+git add tools/import-normalizer/persons.py tools/import-normalizer/normalize.py tools/import-normalizer/tests/test_documents.py tools/import-normalizer/tests/test_normalize.py
+git commit -m "feat(normalizer): unresolved-names report + fix ambiguous-pair over-flagging"
+```
+
+---
+
+### Task 5: README — document the new report
+
+**Files:**
+- Modify: `tools/import-normalizer/README.md`
+
+- [ ] **Step 1: Update the review-file table** in `README.md`. Replace the `ambiguous-receivers.csv` row with an `unresolved-names.csv` row. Find the table row referencing `ambiguous-receivers.csv` and replace it with:
+
+```markdown
+| `unresolved-names.csv` | Names whose value is itself problematic, grouped by `category`: `unknown` (`?`/illegible), `single_token` (first OR last name only), `relational` (`Tante …`), `collective` (`Familie …`), `prose` (a description landed in a name column), `ambiguous_pair` (two given names → likely two people, not auto-split). Review highest-impact categories first; add decisions to `overrides/names.csv`. |
+```
+
+If the README has no such row (older version), add the row above to the review-file table.
+
+- [ ] **Step 2: Add a note** to the iteration-loop section of `README.md` (after the table):
+
+```markdown
+> `unresolved-names.csv` is the focused "names that need a human" list — distinct from
+> `unmatched-names.csv` (which is just non-family correspondents that got provisional persons).
+> The given-name set that drives `ambiguous_pair` detection is the register's first names plus
+> `config.EXTRA_GIVEN_NAMES` — add names there if a real two-person cell isn't being flagged.
+```
+
+- [ ] **Step 3: Verify the suite is still green** (README-only change, but confirm nothing references the old file)
+
+Run: `cd tools/import-normalizer && .venv/bin/python -m pytest tests/ -q && cd -`
+Expected: PASS.
+
+- [ ] **Step 4: Commit**
+
+```bash
+git add tools/import-normalizer/README.md
+git commit -m "docs(normalizer): document unresolved-names.csv review report"
+```
+
+---
+
+## Self-Review
+
+**Spec coverage** (against the agreed proposal):
+- Focused report isolating problem name classes → Task 4 writes `review/unresolved-names.csv` with a `category` column; categories defined in Task 2 `classify_name`. ✓
+- Fix ambiguous over-flagging of `First Surname` → Task 2 `AMBIGUOUS_PAIR` requires *both* tokens in the given-name set; `Mieze Schefold` → `RESOLVABLE` (tested). ✓
+- Distinguish "not fully known" (unknown/single-token/relational/collective/prose) from "can't split cleanly" (ambiguous_pair) → all are `NameClass` values, each its own category column value. ✓
+- Per-category counts in summary → Task 4 stats. ✓
+- Senders covered too (not just receivers) → classification happens in `resolve_one`, which both `resolve_sender` and `resolve_receivers` call. ✓
+
+**Placeholder scan:** No TBD/TODO; every code step has complete code. The README replacement gives the exact row text.
+
+**Type consistency:** `NameClass` (StrEnum) defined Task 2; `classify_name(raw, given_names)` and `build_given_names(register, extra)` signatures used consistently in Task 4; `ResolutionContext(alias_index, name_overrides, given_names=…)` matches the new `__init__`; `self.unresolved` is `list[tuple]` of `(raw, category, source_row)` and read with that shape in both the report and the stats. `str(category)` yields the StrEnum value (e.g. `"ambiguous_pair"`), matching the stat comparisons and the test assertions.
+
+**Cross-task green:** Task 4 deliberately bundles the `persons.py` + `normalize.py` + test changes into one commit because removing `ctx.ambiguous` breaks its consumer otherwise — no red commit is left behind (lesson from the prior build).
+
+**Out of scope (future):** Spanish month names + `Mon DD-YYYY` date form (separate date-parser enhancement); promoting `unresolved` rows into a document-level `needs_review` flag; auto-splitting confirmed `ambiguous_pair` entries via overrides.

docs/import-migration/WORKLOG.md

@@ -4,6 +4,27 @@ Running log of each working session. **Resume here.** Newest entry on top.
 
 ---
 
+## 2026-05-25 (session 5) — Unresolved-name classification
+
+**Did:** Implemented [`04-unresolved-names-plan.md`](./04-unresolved-names-plan.md) subagent-driven
+(5 tasks, TDD, per-task spec + code-quality review; 67 tests pass). Added `classify_name` +
+`NameClass` + `build_given_names` in `persons.py`; `ResolutionContext` now records non-RESOLVABLE
+names in `self.unresolved`; orchestrator writes `review/unresolved-names.csv` (replaces the noisy
+`ambiguous-receivers.csv`) with per-category stats.
+
+**Why:** `unmatched-names.csv` mixes boring non-family correspondents (expected) with genuinely
+unresolvable entries. The new report isolates the latter so review focuses on ~440 real cases.
+
+**Real-run result:** unresolved-names.csv = single_token 191 / prose 103 / unknown 74 /
+collective 46 / relational 21 / ambiguous_pair **5** (distinct). The ambiguous over-flagging fix
+cut `ambiguous_pair` from 303 → 5 (genuine two-given-name pairs only; `Mieze Schefold` etc. now
+correctly RESOLVABLE). given-name set = register first names ∪ `config.EXTRA_GIVEN_NAMES`.
+
+**Next:** populate `overrides/names.csv` from unresolved-names.csv (highest-count first); extend
+`EXTRA_GIVEN_NAMES` if a real pair isn't flagged; still-open date work (Spanish months, 58–72 band).
+
+---
+
 ## 2026-05-25 (session 4) — Built the normalizer (subagent-driven, all 17 tasks)
 
 **Did:** Executed the plan subagent-driven (implementer + spec review + code-quality review per