llm-ingestion-okf/CLAUDE.md

# llm-ingestion-okf

## Context

Shared OKF (Open Knowledge Format) ingestion library. Three entry doors,
one boundary rule:

- **Door A — spec-based ingestion:** implements the normative
  `ingest-spec.md` owned by `portfolio-optimiser-commons` (manifest →
  `file`/`sql`/`http` connector → deterministic materialization of
  `ingest-{id}.md` → index generation; zero model calls). This repo
  IMPLEMENTS the spec; commons keeps authorship. Spec changes the library
  needs go via commons, never edited locally. The library ships the §11
  golden fixtures (byte-exact) for the three door-A source types
  (`ingest-golden-{file,sql,http}/`, shipped in `9dd86b1`).
- **Door B — bundle inbox:** converts dropped files to OKF concepts. The drop
  directory is walked RECURSIVELY, sorted by relative path, and a concept's
  `source_file` is that relative path (`/`-separated) while its NAME still
  comes from the basename — so a nested duplicate hits the §3 collision
  refusal rather than vanishing. Dot-directories and a bundle nested inside
  the inbox are skipped with a code, never silently, because recursion makes
  the door's own output reachable as its own input (operator 2026-09-06; the
  flat listing was not a boundary, it was an absence with no denominator). All
  file-type→text extraction lives HERE (the guard is text-only). v1 core:
  `md`, `txt`, `csv`, `json`, `html` (stdlib). `pdf`/`docx`/`xlsx` only via
  the optional `[extract]` extra; without it those types are rejected
  fail-fast. The extra ships `pdfplumber` for `pdf` (chosen on ONE measured
  property: it keeps a requirement table's label and value on the same line
  where three alternatives do not); `docx`/`xlsx` still ship no parser.
  Structured table recovery is **out of scope** — two independent parsers
  return the same wrong shape, so the breakage is document geometry, not a
  library choice. PDFs enter as prose, and drawn content (figures) does not
  survive extraction at all, which every `pdf` extraction warns about.
  Under the `STRUCTURED_V1` profile Door B additionally DERIVES structure —
  title (leading heading → `title` key → `path.stem`), document number,
  hierarchy, and cross-references — writes it into the concept frontmatter, and
  projects it into a faceted index entry. Every inferred field is named in a
  `derived` list; an unmarked heuristic is worse than none.
  Under the SEGMENTED v0.2 profile a concept additionally POINTS BACK at the
  original: `sources: [{ resource, title }]` in SPEC §5.1's form (`resource` is
  the inbox-relative path), plus a locator per format — `source_pages`,
  `source_sheet`+`source_rows`, else `source_lines`. The locator keys are OURS
  and must stay top-level: §5.1 has no field for a place within a resource, and
  the pinned guard rejects every route to putting one inside a `sources` entry
  (non-allowlisted key, nested flow list, quoted scalar), so a locator in the
  entry would emit bundles Door C could never read back. The unit table is
  built AT EXTRACTION — a page number cannot be recovered from joined text —
  and `source_offset` stays. `source_lines` indexes the EXTRACTED text, never
  the original's paragraphs: measured, docx `<w:p>` counts and converted-line
  counts do not agree on a single one of five documents. Record:
  `docs/2026-09-08-proveniens-k2.md`. The index is a
  PROJECTION recomputed from the whole bundle each round, which is what makes
  rebuild-from-scratch equal an incremental update byte for byte. `DEFAULT` is
  untouched and byte-identical. Record: `docs/plan/structure-derivation.md`.
- **Door C — external bundle import:** third-party OKF bundles are assessed
  per concept via the guard's `okf.import_bundle`; only concepts clearing the
  guard's non-blocking floor are merged/indexed here. Two invariants, both
  load-bearing: a merged concept is written **verbatim** (this library's
  line-oriented frontmatter parser cannot round-trip the block lists the
  guard's parser accepts, so stamping an external concept would destroy sender
  data and persist bytes the guard never screened), and ownership is therefore
  proven by **content identity** — an occupied target name is re-used only
  when the bytes there are already identical, never overwritten otherwise.

**Boundary rule (non-negotiable, zero overlap):** `llm-ingestion-guard`
(pinned `>=1.2,<2.0`) answers "is this content safe to persist?" —
scan/sanitize/quarantine/fail-secure/provenance-stamp. This library is
plumbing: connect source → materialize deterministic OKF bundle → generate
index. Never reimplement security; call the guard at persist gates
(`prepare_input`/`screen_output`, `okf.import_bundle`). When in doubt which
side of the boundary something belongs on: ask the operator.

**Implementation baseline:** the stricter behaviors from
`portfolio-optimiser` (streaming row caps, utf-8-sig, in-memory staging with
pre-mutation collision gate, validated `ingested_at`, typed `IngestError`)
are the library baseline. First consumer: `portfolio-optimiser-claude`.

### Roadmap (phases 1–3 shipped; what follows is demand-driven)

1. **Phase 1 — Door A (Python).** ingest-spec implementation + the §11
   golden fixtures. Consumers: `portfolio-optimiser-claude` first, then
   `portfolio-optimiser`.
2. **Phase 2 — Doors B/C (Python).** Bundle inbox and external-bundle
   import, guard-gated.
3. **Phase 3 — Configurable bundle contract.** Types, layers, frontmatter
   sets, index shape, and reserved-file policy become config instead of
   constants; proving consumer is `claude-code-llm-wiki` (`strict-v1`
   profile). Two consumers hold opposite postures on whether an index is
   authored or directory-derived, so neither is a library invariant and
   nothing here enumerates a directory unless the profile says derived.
4. **Phase 4 — Node half (`node/`).** Zero-dependency Node/ESM package
   (importable *and* CLI-invokable, vendorable per plugin — matching the
   marketplace precedent) for the second-brain world: bundle check, index
   generation, inbox split/frontmatter/write, and doc conversion
   (docx/pdf/eml/html → md). Covers okr, linkedin-studio, ms-ai-architect,
   and the marketplace catalog.

5. **Phase 5 — MCP as a way to populate a bundle. NOT COMMITTED; needs-based
   (operator 2026-08-02, superseding the 2026-07-27 commitment.)** No MCP work,
   and no data-lake or database source types, are undertaken without a stated
   need. `docs/plan/mcp-bundle-population.md` stays as a design record, not a
   queue. Its open fork — whether we are the MCP **server** (an agent calls our
   doors as tools) or an MCP **client** (a manifest source type pulling from
   someone else's server) — no longer blocks anything, because nothing waits
   behind it. It is a question to answer *if* a need arrives, not before. This
   is also why `sql` staying sqlite-only is not a gap: a Postgres driver would
   be runtime dependency number two, bought for no asked-for use.

The two halves share the OKF contract and fixture suite, **not code**.

**Standing posture (operator 2026-08-02).** Phases 1–3 shipped; the library now
runs on what it has. Work is defect fixes, improvements, and features that a
consumer has actually asked for or that measured feedback shows are needed —
not roadmap completion for its own sake. The upstream version policy below is
the one exception, and it is not a counterexample: "always latest" is a promise
already made to consumers, so an upstream release *is* the stated need.
Phase 4 keeps four named consumers with working implementations to lift, so its
need is real but untriggered — it starts when one of them asks, not on a date.

### Upstream version policy (standing, non-negotiable)

**The library always supports the current latest version of Google OKF.** Set by
the operator 2026-07-26. Phases 1–3 were built against v0.1; v0.2 shipped
2026-07-25, so v0.2 support is committed work — not contingent on a consumer
asking for it. Plan: `docs/plan/okf-v0.2-alignment.md`.

Support is **additive, expressed as a new profile**, never a migration of
existing ones. This is what makes the policy sustainable instead of a recurring
crisis, and it is bounded by three facts that do not yield to it:

- `DEFAULT` states commons' ingest-spec §5 layer — its `generated` shape is
  commons' call, raised there, never patched locally. **This fired 2026-08-09:**
  commons ratified and executed the O2 form, so `DEFAULT` now stamps
  `generated: { by: process:okf-ingest, at: <ingested_at> }` and four goldens
  moved with it. It is not a counterexample to "additive, never a migration" —
  that rule governs *upstream* versions, and commons' spec is a separate axis
  `DEFAULT` tracks by definition. `DEFAULT` stays v0.1 on everything upstream
  owns. Ownership recognition is one-way, so the cost to a consumer stays a
  re-run: a profile carrying an actor still owns the older literal stamp.
- `STRICT_V1` mirrors the proving consumer's ratified contract — changing another
  repo's contract from here violates O2.
- `okf_version`'s *value* belongs to catalog (decision E1).

**Rollout is pilot-first.** A new upstream version reaches a small pilot set on a
pre-release tag and is revised on their feedback before general availability —
consumers testing real data find what fixtures cannot. `OKF_LATEST` means the
latest version supported as *stable*, so flipping that alias is the GA event, not
a merge side effect.

Two invariants fall out: no profile hard-codes an upstream version, and no bundle
declares a version its shape has not earned. The first has a mechanism, not just
an intention: **a profile names a key, a caller owns its value.** `okf_version`
is declared through `materialize_bundle(..., root_frontmatter_values=...)`
because its value tracks the upstream Google version and belongs to catalog
(decision E1) — a constant here would claim a decision we do not own, and would
be the one thing to chase on every upstream release. Where upstream itself defers a
contract — v0.2's attestation receipt and verdict wire formats — the format is
supported and the unspecified runtime is not; it re-enters scope when upstream
specifies it. Because "always latest" decays silently, the release checklist
carries an upstream-version re-check.

**Structured frontmatter values are emitted in YAML *flow* form, never block.**
Both are valid YAML and an upstream reader recovers the same structure from
either, but this library's parser is line-oriented: it round-trips a flow
mapping as an opaque value and cannot read the block form at all — two block
mappings sharing an inner key (§10.2's `executor` and `attester`, both carrying
`resource`) collapse into one namespace and the first is lost silently.
Emitting block would produce bundles we cannot read back. Reading it needs the
structured reader (D1b); until then the constraint binds what we write.

**Every upstream release runs `docs/upstream-okf-upgrade-runbook.md`.** Pin the
commit, enumerate the whole `okf/` tree, **read the shipped example bundles and not
only `SPEC.md`**, classify the diff, measure our exposure and each consumer's, plan
additively, pilot before GA, then inform every OKF-consuming repo. The runbook is
not optional and not a summary of good intentions: each step names the concrete
failure it prevents, and all of them are failures that happened during v0.1 → v0.2.

**This repo is a black box for its consumers.** The target cost of an upstream
release to a consuming repo is **a re-run, nothing more**: support is additive
(a new profile, never a migration), existing profiles stay byte-stable, new public
parameters are keyword-only with defaults so positional call sites stay
source-compatible, and consumer golden fixtures must not churn. The boundary is
stated every time rather than glossed — the library absorbs *shape* changes, not
upstream changes to content a consumer authored (v0.2's `timestamp` and
`# Citations` supersessions). For that class the deliverable is a measured exposure
report per consumer, sent before they ask.

Phase 4 preconditions (coordination, not unilateral moves):
- Lifts okr's reference implementations (`okf-check.mjs`, `okf-index.mjs`,
  innboks libs) in agreement with okr and the marketplace catalog; the
  catalog remains the convention owner and re-pins its shared gate here.
- linkedin-studio's `ingest/published/` provenance-record grammar stays
  plugin-local by design (different lifecycle) — do not normalize it.
- The Node-side persist gate remains security territory: guard-as-contract
  (per okr's adoption doc) until a Node guard exists in the security repo.
  No security reimplementation here, in either runtime.

### Non-goals (all phases)

- Verdict/feedback machinery (method-spec) — stays in consumer repos.
- Embedding/RAG/retrieval layers.
- Security functionality — always the guard's domain.

## Stack

Python 3.10+. Package `llm_ingestion_okf` (src layout, hatchling).
**Exactly one runtime dependency, ever:** `llm-ingestion-guard>=1.2,<2.0`
(itself zero-dep), landed with the Door B/C persist gates. Everything else is
stdlib, and a packaging test enforces it. Only `guard_adapter.py` imports the
guard; importing the package does not. Install channel until the package
index exists (a direct reference is a channel, not the pin):
`pip install "llm-ingestion-guard @ git+https://git.fromaitochitta.com/open/llm-ingestion-pipeline-security.git@v1.2.0"`.
Binary extraction parsers live behind the `[extract]` extra only — today
`pdfplumber>=0.11.10,<0.12` for `pdf`. Extracted PDF text is pinned to an
exact transitive parser version (`pdfminer.six==20260107`), so widening that
range is a fixture migration, guarded by a frozen literal in
`tests/test_extract.py`; see `tests/fixtures/README.md`.

Phase 4 adds a `node/` half: Node/ESM with zero npm dependencies
(`node:` builtins only), both importable and CLI-invokable, consumed by
vendoring per plugin rather than npm publishing. The halves share contract
and fixtures, never code.

## Conventions

- Type hints everywhere; `mypy --strict` target.
- Determinism is bit-exact: `ingested_at` is an explicit required argument
  (no wall-clock defaults); LF-only output; golden fixtures compared
  byte-for-byte.
- Filenames and titles are normalized to Unicode NFC before use
  (`materialize.reduce_to_id_grammar`, `inbox.process_inbox`): macOS/APFS
  hands filenames over in decomposed form, so an `é` arrives as `e` +
  combining acute. Without normalizing first, the same visual name (e.g. a
  Norwegian slugger title like "linkedin-studio") reduces differently
  depending on which form it arrived in, splitting one title into two
  generated filenames.
- No model calls anywhere in the run path.
- Credentials only as env-var *references* resolved at runtime; never in
  manifests, logs, or frontmatter.
- Network access requires an explicit per-run opt-in flag; refuse fail-fast
  otherwise.
- Conventional Commits: `type(scope): description`.
- English for all code, docs, and commit messages (public repo).

## Commands

- Test: `pytest`
- Lint: `ruff check .` + `ruff format --check .`
- Type check: `mypy --strict src/`
- Folder to questionable bundle in ONE command: `okf project <folder>` —
  `okf build` with the package default into `<out>/.okf/<id>/` plus `okf skill`
  into `<out>/.claude/skills/<id>-consume/`, `<out>` defaulting to cwd and
  `<id>` to the folder name reduced to `[a-z0-9-]`. It owns NO flag that moves
  a bundle's bytes and a test holds it byte-equal to `okf build`; two build
  paths would leave every measurement report pinned to a bundle nobody
  produces. `skills/okf-prosjekt/` is the Claude Code skill over it.
- Build a bundle: `okf build <folder> --bundle <dir> --bundle-id <id>
  --okf-version <v>` — the installed console script (`[project.scripts]`),
  the packaged form of what used to be a shell loop over two `tools/`
  scripts. It is orchestration only: the proposer and the corpus harness
  live in `llm_ingestion_okf.propose` and `llm_ingestion_okf.corpus`, and
  the `tools/` scripts are thin entry points to the same functions so the
  published reproduction blocks still run. Path scope for a document's
  proposals is its RELATIVE path minus the extension (the door walks
  recursively, and two same-named documents in different folders must not
  collide); `--ingested-at` and `--proposed-at` default to one shared epoch
  constant rather than the clock, because a wall-clock default takes
  rebuild-equals-incremental away from anyone who omits them.
  **Six segmentation rules are REACHABLE here, and since 2026-09-08 THREE of
  them are ON by default** -- `--outline-run 3`, `--table-grid` and
  `--unit-fold`, each with an explicit opt-out (`--outline-run 0`,
  `--no-table-grid`, `--no-unit-fold`) that together reproduce the pre-move
  bytes. Arm E joined a session after the other two, on a number measured
  AFTER the first move: without it Arm F's table clause has no joined table to
  fold, and the shipped D+F default scored 2 of 12 with `docx` 0 of 3 against
  the 5 of 12 the fold was published with. **The proposer's own defaults did NOT move** (`propose.py`'s rules stay
  off): the goldens and every published reproduction block are pinned to them,
  so the two layers disagree on purpose and `cli.DEFAULT_OUTLINE_RUN` /
  `cli.DEFAULT_UNIT_FOLD` say where. The cost to a consumer is a re-run and it
  is not small: the 43-document reference corpus goes 629 concepts / 1108 files
  (`9cd74519...`, the delivered 2026-09-03 tree) to **492 / 944**
  (`bdefa679...`, default flags, default epoch stamp, measured 2026-09-08 on
  `f6fea13`). That digest SUPERSEDES `42c8646d...` (517 / 969), which named the
  round-3 default before Arm E joined it. **And the number the
  decision cites belongs to another configuration:** Arm F's 5 of 12 was
  measured with `--table-grid` ON; without it the same sample scores 2 of 12
  and `docx` 0 of 3, because the fold's table clause has no joined table to
  fold. The six (2026-09-08): `--outline-run N` (Arm D), `--table-grid` (Arm E),
  `--unit-fold` (Arm F), `--keep-table-heading` (D1), `--sheet-section-rows`
  and `--drop-wrapped-outline` (both D3), each passed to the proposer
  unchanged. Until that day the build path called the proposer with no
  arm flag at all, so a tender PDF that Arm D splits into nine concepts landed
  as one -- a build path a full arm behind the proposer. Exposing them was not
  the same decision as moving one, and the two were taken a session apart:
  **which arm ships as the default is the operator's**, answered 2026-09-08 as
  above. Adding a flag still leaves the default byte-identical (measured by
  digest before and after, and by Arm E over all 43 corpus documents); MOVING
  the default is the one thing that does not, which is why it took an operator
  decision and carries an opt-out. Arm C
  (`--max-segment-chars`) stays unexposed: no reference has ever been measured
  for its cap. The two D3 rules read grammars nothing else here reads: a table
  row's FIRST CELL (a run of bare numeric labels cuts the block that holds
  them, which is the only way to reach a sheet whose units are rows and the
  opposite direction from Arm E), and whether a RECOVERED heading's line is a
  wrapped sentence (a heading is a complete line; quoted regulation and a
  recovered table row are not). Both remove or add nothing anywhere else: over
  the 43-document corpus they change 1 and 5 of 39 readable documents, and
  **0 of 5 `docx` either way**. Reports:
  `docs/2026-09-08-k3-arm-f-mot-enhetsarket.md`,
  `docs/2026-09-08-k3-runde2-per-filtype.md` and
  `docs/2026-09-08-k3-runde3-per-filtype.md`.
- **Three PDF READER flags, all off, and they sit BEFORE every segmentation
  flag** -- an arm changes how the proposer cuts a text, these change what the
  text says. `--pdf-headings font` infers a heading from typography (dominant
  font size above the document's character-weighted body median AND a bold font
  name -- the CONJUNCTION measured at recall 1.000 / precision 0.846, where
  adding weight as a disjunct took precision 0.786 -> 0.524) and emits it as an
  ATX heading in the SAME markdown the office path produces, so `_ATX` applies
  unchanged and **no PDF-only heading grammar exists**. It is off **by
  measurement, not by caution**: against the operator's unit worksheet it takes
  `pdf` from **2 of 8 to 0 of 8**, losing two exact matches, because on those
  documents the outline rule already recovers the document's own numbered
  chapters and a second heading source can only add. The cost of the ATX form is
  named rather than hidden: a font-inferred heading carries `rule:heading` and is
  indistinguishable in the artifact from one the document declared, which is why
  `RULE_POPPLER_SIZE_AND_BOLD` was deliberately NOT assigned to it -- that name
  records a poppler measurement on a path that cannot ship. `--ocr` reads a page
  as an IMAGE when its own text never arrived (empty, or `(cid:N)` codes at or
  above `OCR_CID_SHARE = 0.10`, a threshold READ OFF the measured per-page
  distribution: 834 pages over 32 files, 818 at exactly 0.0 and 16 at 0.93 or
  above, nothing between). Its engine is the optional `ocr` group
  (`rapidocr`/`onnxruntime`/`pypdfium2`) and **never** a runtime dependency; a
  packaging test pins both halves, and without it every affected file is a coded
  rejection (`extractor_ocr_group_missing`), never a crash. `--ocr` can never
  become a default -- an optional dependency in the default path would make an
  ordinary install fail on the first scanned page. Report:
  `docs/2026-09-08-k3-runde4-pdf-skrift-og-ocr.md`.
  **`--pdf-headings font-reserve`** is the third value on that same option
  (`none`, `font`, `font-reserve` — three answers to one question, so no caller
  can ask for two at once): the same typographic rule applied ONLY where Arm D's
  outline gate admits no run at all, typography as a second heading source where
  there is no first one. The condition lives in ONE function
  (`propose.heading_reserve_applies`) that the proposer and the door both
  consult, the door receiving it as a callable the way it already receives
  `gate` — a plan indexes the exact string it was proposed against, so a reserve
  firing on one side only would turn every document it touches into a coded
  rejection. It reads the gate AS CONFIGURED, so at `--outline-run 0` it is
  unconditional and equals round 4's "font instead of Arm D". **Off, and the
  measurement is that it changes nothing measurable:** on the twelve-position
  reference it alters **not one cell** — the five positions where it fires are
  one PDF whose glyphs carry no ToUnicode mapping and four office documents the
  PDF reader never touches — and the position it was built for has **three**
  outline runs, so the reserve is silent there by construction. Its reach is
  real but unrated: **4 of 39** readable corpus documents, none in the sample.
  Report: `docs/2026-09-08-k3-runde5-hitat8-og-skriftakse.md`, which also
  corrects two of this repository's own published figures — the S7 candidate
  ranks (96 of 629 / 159 of 492 were measured with the cost vocabulary reaching
  only half the ranker; consistently scored they are **10 of 629** and **19 of
  492**) and round 4's attribution of that concept's non-delivery to the default
  move (it is not delivered on the Arm B bundle either, by a different
  mechanism). hit@8 over the six published questions holds at **5 of 6 on both
  K2 bundles**, so the default move cost the retrieval side nothing.
- Consume a bundle: `okf consume <bundle> --question "<q>"
  [--k N] [--limit N] [--out PATH] [--ref IDENTITY]` — the **pre-pass**
  `docs/consumption-contract.md` § 1 defines, and the only reading direction
  this library has. **It moved into the package 2026-09-08 (O5)** and the move
  it was written for is the one that happened: `build_payload(...)` was always
  the entry point with the CLI a thin `main()`, so it was a move and not a
  rewrite. What forced it was the generated skill — from `tools/` it emitted
  `python3 <absolute path>/tools/okf_consume.py`, so the skill could not be
  moved, shared or run by anyone without that clone. `tools/okf_consume.py`
  remains as an ALIAS (`sys.modules[__name__] = _impl`, never a re-export: a
  re-export binds copies, and a caller patching one patches a binding the
  implementation never reads). Deterministic and offline by construction: no model call, no socket,
  no clock, stdlib plus this package only. It **walks the index tree, never a
  directory** — § 9.2 forbids enumerating one unless the named profile says the
  index is derived, and measured, `entries_match_directory` is `True` for
  `STRICT_V1` alone; the walk loses nothing (629 = 629 on the K2 bundle,
  controlled in a test against the very method § 9.2 forbids). `--ref` is an
  **assertion**, never an override: the emitted identity is always the computed
  one, because § 3.3 exists to stop a payload being labelled with an identity
  its bytes do not have. Three exit codes: 0 written, 1 refused, 2 did not run.
  **Every excerpt carries the concept's `title`**, plus `req_number`, the § 5.1
  address `sources`, and **every top-level `source_*` key by PREFIX** — never an
  allowlist, because a list names the producers its author thought of and one
  bundle locates by `source_element_id` on 269 of 274 concepts. A prefix, never
  a substring (`resource_owner` is not a locator). An absent key stays absent
  and an undecodable address is named (`sources_unreadable`). `sources` is READ
  in both YAML forms because the two real bundles disagree (flow 629/629 on one,
  block 270/270 on the other) — reading block is not a licence to write it, the
  emission rule is unchanged. Contract § 8 makes `title` a MUST (checker code
  `excerpt_unnamed`) and the rest SHOULD, because they are conditional on the
  producer. The measurement behind it: rank 1 of 8 on 3 of 3 bundles, correct
  answer on 1 of 3.
- Connect a bundle to Claude Code: `okf skill <bundle> --out
  <dir>` instantiates `skills/okf-consume-template/` for THAT bundle — its id,
  ref, concept count, conditional-field denominators, whole-bundle cost and
  breaking point, all measured, plus a reference payload the checker accepts.
  It was kept in `tools/` until 2026-09-08 because a wheel-installed
  `okf skill` would emit a command pointing at a file the wheel does not carry.
  That objection was about what the GENERATED skill NAMES, and O5 answered it
  by changing that: the emitted commands are `okf consume` and `okf check`,
  names on PATH. The template and `docs/consumption-contract.md` (the § 7.4
  known-positive) are force-included into the wheel from the file they are
  authored in — one authored copy, no committed duplicate.
  The form was chosen on a measurement: the contract checker passes the
  UNFILLED template and passes a skill built for another bundle, so it cannot
  tell the two apart — the choice rests on § 5/§ 6.4/§ 7.6 being per-bundle
  numbers a generic skill can only leave as holes or state falsely.
  The first instantiated consumption skill is `skills/okf-consume/`; the
  measurement behind it, including the control that FAILED, is
  `docs/2026-09-07-okf-konsumskill-maaling.md`. **The ranking is this
  repository's own choice** — the contract binds a payload, not a retrieval
  algorithm (§ 10) — and it has FOUR optional widenings, all **off by default**
  and all keeping the default payload byte-identical. `--cost-vocabulary`: a
  declared cost/price/quantity vocabulary family that bridges a question and a
  document naming money with different words, gated on the QUESTION carrying
  such a term, so a question without one is byte-identical either way. It moves
  a measured case from candidate rank 249 to 10 and does **not** deliver it —
  the budget is a second, independent lock. Measured, with two rules falsified
  before building and the `k`-sweep that showed a higher `k` can EVICT a gold
  concept, in `docs/2026-09-08-blindsone-below-k-k2.md`.
  `--reserve-top-rank` is that second lock: the pack is an exact knapsack over a
  SUM, so it has no opinion about rank and out-sums a top-ranked excerpt costing
  a large share of the budget. The flag gives rank one its bytes first, AFTER
  the `over_budget_alone` pre-exclusion and never before, and declares
  `budget.reserved` in the payload. It fixes the eviction and does **not** close
  the mandate-shaped blind spot (that concept ranks 10, not 1); the budget stays
  the caller's decision, because deriving a limit from the corpus was measured
  and falsified — two defensible derivations, 49x apart, one of them breaking
  the known-positive. `docs/2026-09-08-blindsone-laas2-budsjett-k2.md`.
  `--rarity-weight` is the third: each lexical hit weighs `log(N/df)` over the
  bundle's own concepts instead of 1, so an identifier is not worth what a
  common verb is worth. It enters the RANKING and never the GATE — `lexical`
  stays a count, because a word every concept carries weighs exactly 0 and a
  weighted gate is what `54a0bc2` falsified. Off by default BY MEASUREMENT: it
  delivers one of three requirement lookups and takes a priced sheet from
  candidate rank 10 to 2, leaves one gold unmoved and costs another seven rank
  positions. Two limits are decomposed rather than guessed, and both are
  someone else's mechanism: `MIN_SHARED_PREFIX = 4` makes a unique identifier
  read as 135-of-446 common, and RRF consumes RANKS, so no weighting inside a
  signal can move a gold that already leads it.
  `docs/2026-09-08-sjeldenhetsvekt.md`.
  `--tie-shared-rank` is the fourth, and it is a correction to the TIE-BREAK
  rather than a weight: RRF ranks every concept in every signal, including a
  signal that scored them all the same, and the declared `(-score, concept_id)`
  tie-break then orders that group by id. Measured on N500, whose document
  prior has **two** distinct values over 270 concepts, that signal contributed
  alphabetical UUID order and put a concept answering 7 of 7 question tokens at
  fused rank 14 — outside the cut — behind concepts sharing only `tunnel` and
  `vann`. Under shared ranks it is rank 3 and 2 of the 16 covering concepts are
  delivered. Off by default BY MEASUREMENT: the three requirement lookups hold
  at rank 1 and the K2 digest holds, but hit@8 over the six published questions
  falls 5 of 6 to 4 of 6, because K2's prior is coarse rather than degenerate
  (6 values over 39 documents) and one gold sat early in its tie group — a
  benefit that was never a measurement, but a published row all the same.
  `docs/2026-09-08-rangeringsbom-sammensatte-ord.md`.
  A FIFTH flag is not a ranking widening and is listed apart: `--withheld-titles`
  gives each `withheld` entry the concept's `title`, so a reader can see WHAT
  was withheld without reading the bundle (§ 2.2 forbids going to look). The
  code is 11 lines; the bytes are the reason it is off. Measured, it grows an
  N500 payload 37.9 % and takes the 629-concept K2 bundle's BOOKKEEPING to
  122 704 B — past the 120 000-byte limit itself — which would make the
  breaking point published in the tracked `skills/okf-consume/SKILL.md`
  ("~75 KB at 629 concepts … at roughly 8 000 concepts") false on the day it
  shipped.

## Workflow

- TDD: no production code without a failing test first.
- This repo is published PUBLICLY (`open/` namespace on Forgejo). `STATE.md`
  and `docs/oppstartsprompt.md` are LOCAL-ONLY (gitignored) — never commit
  session state or internal briefs. No secrets, sober English prose, no
  marketing language.
- **Consumer content stays at form level in public files.** Some consumers we
  read are private (`claude-code-llm-wiki` is, pending an Anthropic ToS
  assessment). Key names, counts, gate names, profile fields and contract shapes
  are publishable; page bodies, full title or path lists from a consumer's
  bundle, and Anthropic-derived prose are not. Findings about a private
  consumer's data go back to them through coord, never as a file here. This
  costs nothing — every question this library asks of a consumer is about shapes
  and key sets — and it is not reversible once pushed.
- After `git commit`: push to Forgejo (`git push origin`) immediately.
  Never GitHub.

## Communication patterns

### Linking to local files

When pointing to local files in responses, always use markdown link syntax
with a descriptive name:

- Use `[Human-friendly name](file:///absolute/path)` — never bare
  `file:///...` URLs or autolinks `<file://...>`.
- Always use absolute paths. Never `~/` or relative paths.
- For multiple files, render as a bullet list of named markdown links.

Why: bare `file://` URLs only render the first as clickable across multiple
lines. Named markdown links make each entry independently clickable and look
cleaner.