feat(propose,consume,profiles,importer): recovery yields to declaration, and 9 % of the corpus that was in no segment

One rule explains every remaining `pdf` miss on the twelve-position reference:
where a document DECLARES headings, Arm D's RECOVERED headings are the whole of
the excess, and every declared one is a unit the reference wants. `--outline-gate`
admits recovery only where the document declares none of its own, plus any one
recovered heading covering OUTLINE_SHARE (0.20) of the text. It is `fold_units`
clause 2's own principle moved from voting to admission, and it filters at
ADMISSION so the text a removed mark opened is carried by the mark above it --
the post-filter form scores identically on all twelve positions and loses that
text, which is why only one of them shipped.

`--outline-gate` and `--drop-wrapped-outline` become the package default, one
decision because neither carries the reference alone: `pdf` 2 of 8 -> 5 of 8
alone, 7 of 8 together; the sheet 5 of 12 -> 10 of 12; `docx` unchanged at 3 of
3. Each keeps an explicit opt-out. The bar the move had to clear was not the
reference: hit@8 on a K2 bundle built with it holds 5 of 6 at ranks 1,1,1,1,1,-,
no row losing rank 1. `--sheet-section-rows --keep-table-heading` reaches 11 of
12 and does NOT ship, because on a bundle built with it row 1 falls rank 1 -> 2.
Cost to a consumer is a re-run: 492 concepts / 944 files -> 425 / 810.

DOCUMENT_PRIOR_EXPONENT makes the document prior sublinear (total/n**0.5). A sum
measures size and a density is diluted by every unit carrying none of the
question, so a document split 1 -> 12 lost its prior by 12. Swept over five
values on 18 rows it is at least as good as the delivered density everywhere and
strictly better on three. Stated plainly: end to end it moved NOT ONE hit@8 row
on any of four bundles, so it did not solve the knot it was adopted for -- what
did is that the `pdf` gain never needed `--sheet-section-rows`.

`--first-span-from-zero` is off and repairs a measured loss found while chasing
one position's 940 characters: 32 of the 32 documents that get a plan leave the
text above their first concept in no segment -- 159 704 characters, 9.18 % of
the corpus, 45 841 from one document. It changes nothing on the reference. Off
because it moves the first span of essentially every bundle with no hit@8 number
behind it yet.

vegnormal-okf FUNN 2: SPEC section 8's own star row parsed as prose, so every
concept behind one was unreachable to the section 9.2 walk. `IndexPolicy.also_reads`
carries it for the SEGMENTED profiles, read-only, after the emitted pattern
misses -- the asymmetry `sources` already has. DEFAULT and STRICT_V1 untouched (O2).

vegnormal-okf FUNN 1: Door C's own outcome was refused at exit 1,
`bundle_id_missing`. `import_bundle` now takes `root_frontmatter_values`,
keyword-only, rendered before any disk mutation, written only when the index is
created -- Door B's mechanism and ordering.

Report: docs/2026-09-09-k3-runde6-outline-gaten-og-prioren.md.
Suite 1478 passed (1449 before), ruff and mypy clean.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

src/llm_ingestion_okf/importer.py

@@ -35,6 +35,7 @@ from typing import Protocol
 from .errors import IngestError, MaterializationError, SourceError
 from .extract import decode_text
 from .materialize import (
+    _render_root_frontmatter,
     check_filename_length,
     link_in_index,
     parse_frontmatter,
@@ -363,6 +364,7 @@ def import_bundle(
     channel: str,
     gate: ImportGate,
     profile: BundleProfile = DEFAULT,
+    root_frontmatter_values: Mapping[str, str] | None = None,
 ) -> ImportResult:
     """Merge the accepted concepts of an external OKF bundle (Door C).
 
@@ -374,6 +376,21 @@ def import_bundle(
     INCLUDING a disposition this library does not recognise and a concept the
     gate returned no verdict for, fails closed.
 
+    `root_frontmatter_values` supplies the values for the keys the profile's
+    index policy names, exactly as Door B's `materialize_bundle` does, and for
+    the same reason: a profile names a key, the CALLER owns its value (E1).
+    Without it this door's own outcome was not a readable bundle -- the root
+    index carried no frontmatter, so it declared no `bundle_id`, and the
+    reading direction refused it with `bundle_id_missing` because SS 3.1's
+    identity is the `(bundle_id, concept_id)` tuple and half of it was absent.
+    Reported by vegnormal-okf 2026-09-08 (FUNN 1), who worked around it by
+    using this door as a gate and writing the consumable tree themselves.
+
+    Keyword-only with a default of `None`, so every existing call site emits
+    the bytes it always did. The block is written only when the index is
+    CREATED, which is `materialize_bundle`'s rule and is what keeps a second
+    run into an existing bundle byte-identical to the first.
+
     `profile` names the filename namespace this door writes into and the shape
     of the index it maintains. It is keyword-only and defaults to `DEFAULT`, so
     every existing call site emits the bytes it always did — a consumer with
@@ -388,6 +405,9 @@ def import_bundle(
     are wrong for every concept at once: an invalid `ingested_at`, an
     unrecognised `origin`/`channel`, and a missing source directory.
     """
+    # Before any disk mutation, like `materialize_bundle`: a caller naming a key
+    # this profile does not carry must not leave a half-written bundle behind.
+    root_frontmatter = _render_root_frontmatter(root_frontmatter_values or {}, profile=profile)
     validate_ingested_at(ingested_at)
     if origin not in _ORIGINS or channel not in _CHANNELS:
         raise MaterializationError(
@@ -541,7 +561,7 @@ def import_bundle(
         if merged:
             index_path = bundle / profile.index.name
             if not index_path.is_file():
-                write_bytes(bundle, profile.index.name, "")
+                write_bytes(bundle, profile.index.name, root_frontmatter)
             # Projected first, in merge order, so the report of what could not
             # be rendered reads in the order the concepts were merged. ORDERED
             # second, through the POLICY's helper — the same one Door B calls,