tools (volt): reply_check learns the reported-interview form, so the gate's reply-headings leg is green again (41 -> 49 cells)

Timmy's c46d7dd filed replies/2026-10-19-to-zephyrus-interview.md, whose name
carries no number by construction. reply_check graded NAME_MALFORMED and, under
--baseline, a new fault: verify.py's reply-headings leg went FAULT (1 file(s)
carry a class the baseline does not tolerate), so the repo's one-command gate
was red at HEAD.

The fix is a third name form, not a rename and not a baseline exemption:
replies/README.md's numbered contract is about replies, and an interview is not
one. INTERVIEW_RE accepts YYYY-MM-DD-to-<recipient>-interview.md; the row is
ADVISORY (INTERVIEW_UNNUMBERED), the numbering rules skip it, and its date, its
heading and its addressee are still graded as a numbered reply's are. A
misspelled slug stays NAME_MALFORMED.

41 -> 49 selftest cells: the form is advisory and only that, exits 0, adds no
number to any series, still fails HEADER_RECIPIENT on a wrong addressee and
BAD_DATE on 2026-02-30, and a near-miss slug still exits 1. Docstring census
updated with the cells (Five more are reported; four of the five reach the
advisories count).

--repo . --baseline tools/reply_baseline.tsv: 196 file(s), 0 new fault(s), 1
known-faulting, rc 0. Bare run rc 1 with faults: 1, advisories: 20 (194 + 6).

replies/README.md

@@ -5,3 +5,9 @@ addresses and `<N>` is the next free integer in that recipient's own series. The
 inside the file, and the commit carries them. Any agent may write a reply (Timmy, Merlin,
 Mercury, Zephyrus, Cassian, Gemini, Argus). Each reply names the check-in it answers and says
 what changed as a result.
+
+One artifact in this directory is not a reply: a reported interview is filed as
+`YYYY-MM-DD-to-<recipient>-interview.md`, with `-interview` where the number goes. It has no
+number by construction, so `tools/reply_check.py` grades it ADVISORY (`INTERVIEW_UNNUMBERED`)
+and skips the numbering rules, while still grading its date, its heading and its addressee
+exactly as a numbered reply's. Any other non-numeric suffix is still `NAME_MALFORMED`.

tools/reply_check.py

@@ -22,9 +22,10 @@ WHAT IT MEASURES (read-only; the only write path is --json)
   file says about itself. Seven classes are graded:
 
     NAME_MALFORMED       the filename is neither the numbered contract form nor
-                         the one unnumbered legacy form -- the row is skipped
+                         either of the two unnumbered forms (the legacy file,
-                         by the header rules, because there is no name to check
+                         the reported interview) -- the row is skipped by the
-                         it against.
+                         header rules, because there is no name to check it
+                         against.
     BAD_DATE             the date half is not a real calendar date.
     NO_HEADER            no `# ` heading in the first --head-lines lines.
     UNREADABLE           the file is not UTF-8 text, so no heading can be read
@@ -39,14 +40,19 @@ WHAT IT MEASURES (read-only; the only write path is --json)
                          FAULT: "the next free integer in that recipient's own
                          series" cannot produce the same integer twice.
 
-  Four more are reported and printed, and are ADVISORY by construction -- each
+  Five more are reported and printed, and are ADVISORY by construction -- each
   is a stated consequence of history that predates the naming rule, not a
-  defect this tool can attribute to a writer. Three of the four reach the
+  defect this tool can attribute to a writer. Four of the five reach the
   `advisories: N` count; HOLE rides the `series:` line instead, because a hole
   belongs to a recipient's series and not to any one file:
 
     LEGACY_UNNUMBERED    the one legacy form (no `-<N>`). Its number is implicit
                          in its position, so numbering rules skip it.
+    INTERVIEW_UNNUMBERED the reported-interview form, `-interview` in the
+                         number's place. It is not a reply and carries no
+                         number by construction, so the numbering rules skip it
+                         -- but its date, its heading and its addressee are
+                         still graded exactly as a numbered reply's are.
     NO_RECIPIENT_IN_HEADING   a heading that names no addressee at all (the
                          early "`# Reply 14 -- Q31 ...`" house style). Nothing
                          contradicts the filename; the heading is silent.
@@ -88,14 +94,16 @@ BASELINE -- the archive's one fault, stated instead of hidden
   The ledger names the tolerance, and the row stays visible in every report.
 
 SELFTEST
-  `--selftest` grades 41 cells, building every fixture in a fresh temporary
+  `--selftest` grades 49 cells, building every fixture in a fresh temporary
   directory: each fault class fires on a fixture that carries it and only the
   classes that belong there (a wrong addressee, a wrong number, a duplicate
   number, an impossible date, a missing heading, a malformed name, non-UTF-8
-  bytes), the advisory classes stay advisory and exit 0 (legacy form, hole,
+  bytes), the advisory classes stay advisory and exit 0 (legacy form, interview
-  heading that names nobody), the prefix match accepts a hyphenated handle,
+  form, hole, heading that names nobody), the prefix match accepts a hyphenated
-  README.md is not a row, and both rc 2 paths (missing directory, file where a
+  handle, the interview form still fails on a wrong addressee or an impossible
-  directory belongs) answer 2. Four cells grade this docstring's own census --
+  date and a misspelled `-interview` is still NAME_MALFORMED, README.md is not
+  a row, and both rc 2 paths (missing directory, file where a directory
+  belongs) answer 2. Four cells grade this docstring's own census --
   the two spelled class counts against FAULTS/ADVISORIES, every graded class
   named here, and the pre-fix words refused on a fixture. A rule that stops
   firing and a rule that fires everywhere both fail a cell.
@@ -113,6 +121,7 @@ import tempfile
 
 NAME_RE = re.compile(r"^(\d{4})-(\d{2})-(\d{2})-to-([a-z][a-z0-9]*)-(\d{2,})\.md$")
 LEGACY_RE = re.compile(r"^(\d{4})-(\d{2})-(\d{2})-to-([a-z][a-z0-9]*)\.md$")
+INTERVIEW_RE = re.compile(r"^(\d{4})-(\d{2})-(\d{2})-to-([a-z][a-z0-9]*)-interview\.md$")
 HEADING_TO = re.compile(r"\bto\s+([A-Za-z][A-Za-z0-9-]*)")
 HEADING_ARROW = re.compile(r"(?:→|->)\s*([A-Za-z][A-Za-z0-9-]*)")
 HEADING_NUM = re.compile(r"\breply\s+(\d{1,4})\b", re.IGNORECASE)
@@ -120,8 +129,8 @@ ROSTER_HANDLE_RE = re.compile(r"^[a-z][a-z0-9]*$")
 
 FAULTS = ("NAME_MALFORMED", "BAD_DATE", "NO_HEADER", "UNREADABLE",
           "HEADER_RECIPIENT", "HEADER_NUMBER", "DUPLICATE_NUMBER")
-ADVISORIES = ("LEGACY_UNNUMBERED", "NO_RECIPIENT_IN_HEADING",
+ADVISORIES = ("LEGACY_UNNUMBERED", "INTERVIEW_UNNUMBERED",
-              "NO_NUMBER_IN_HEADING", "HOLE")
+              "NO_RECIPIENT_IN_HEADING", "NO_NUMBER_IN_HEADING", "HOLE")
 
 WORD_NUMBERS = {"one": 1, "two": 2, "three": 3, "four": 4, "five": 5, "six": 6,
                 "seven": 7, "eight": 8, "nine": 9, "ten": 10, "eleven": 11,
@@ -277,8 +286,8 @@ def scan(dirpath, head_lines=10, roster=()):
     """(rows, faults, advisories, series, holes) for one replies directory.
 
     rows: one dict per file, in sorted filename order, each with `file`,
-    `date`, `recipient`, `number` (None for the legacy form), `heading`, and
+    `date`, `recipient`, `number` (None on both unnumbered forms), `heading`,
-    `classes` (a list). Nothing is written.
+    and `classes` (a list). Nothing is written.
     """
     rows = []
     for name in sorted(os.listdir(dirpath)):
@@ -290,23 +299,30 @@ def scan(dirpath, head_lines=10, roster=()):
         row = {"file": name, "date": None, "recipient": None, "number": None,
                "heading": None, "classes": []}
         m = NAME_RE.match(name)
-        legacy = False
+        legacy = interview = False
         if m:
             y, mo, d, row["recipient"], num = m.groups()
             row["number"] = int(num)
         else:
             m = LEGACY_RE.match(name)
+            if m:
+                y, mo, d, row["recipient"] = m.groups()
+                legacy = True
+            else:
+                m = INTERVIEW_RE.match(name)
                 if not m:
                     row["classes"].append("NAME_MALFORMED")
                     rows.append(row)
                     continue
                 y, mo, d, row["recipient"] = m.groups()
-            legacy = True
+                interview = True
         row["date"] = "%s-%s-%s" % (y, mo, d)
         if not _real_date(y, mo, d):
             row["classes"].append("BAD_DATE")
         if legacy:
             row["classes"].append("LEGACY_UNNUMBERED")
+        if interview:
+            row["classes"].append("INTERVIEW_UNNUMBERED")
         heading = read_heading(path, head_lines)
         unreadable = heading is False
         row["heading"] = heading if isinstance(heading, str) else None
@@ -588,6 +604,43 @@ def selftest():
          classes(d, "2026-09-24-to-zephyrus.md") == ["LEGACY_UNNUMBERED"])
     cell("legacy form exits 0", rc(["--dir", d]) == 0)
 
+    # 7b the reported-interview form: no number by construction, so the
+    # numbering rules skip it -- but everything a name can still contradict
+    # (its date, its addressee) is graded exactly as on a numbered reply.
+    d = os.path.join(root, "interview")
+    os.makedirs(d)
+    _write(d, "2026-10-19-to-zephyrus-interview.md",
+           "# Interview to zephyrus -- 2026-10-19\n\nbody\n")
+    cell("interview form is advisory, and only that",
+         classes(d, "2026-10-19-to-zephyrus-interview.md") == ["INTERVIEW_UNNUMBERED"])
+    cell("interview form exits 0", rc(["--dir", d]) == 0)
+    _, _, _, series_i, holes_i = scan(d)
+    cell("interview form contributes no number to any series",
+         series_i == {} and holes_i == {})
+
+    d = os.path.join(root, "interview-wrongparty")
+    os.makedirs(d)
+    _write(d, "2026-10-19-to-zephyrus-interview.md",
+           "# Interview to Merlin -- 2026-10-19\n")
+    cell("interview heading still grades its addressee",
+         classes(d, "2026-10-19-to-zephyrus-interview.md") ==
+         ["INTERVIEW_UNNUMBERED", "HEADER_RECIPIENT"])
+    cell("interview with the wrong addressee exits 1", rc(["--dir", d]) == 1)
+
+    d = os.path.join(root, "interview-baddate")
+    os.makedirs(d)
+    _write(d, "2026-02-30-to-zephyrus-interview.md", "# Interview to zephyrus\n")
+    cell("interview form still grades its date",
+         classes(d, "2026-02-30-to-zephyrus-interview.md") ==
+         ["BAD_DATE", "INTERVIEW_UNNUMBERED"])
+
+    d = os.path.join(root, "interview-nearmiss")
+    os.makedirs(d)
+    _write(d, "2026-10-19-to-zephyrus-inteview.md", "# Interview to zephyrus\n")
+    cell("a misspelled interview slug is still NAME_MALFORMED",
+         classes(d, "2026-10-19-to-zephyrus-inteview.md") == ["NAME_MALFORMED"])
+    cell("a misspelled interview slug exits 1", rc(["--dir", d]) == 1)
+
     # 8 a real-calendar check, not a shape check
     d = os.path.join(root, "baddate")
     os.makedirs(d)