feat: Prosa ist kein Identifier - Link-Taxonomie als Enum, generierte Regionen mit Markern (4.0.0)

Files changed:
- .gitea/workflows/ci.yml
- AGENTS.md
- CHANGES.md
- VERSION
- instructions/CONTRACT.md
- instructions/link-taxonomy.md
- instructions/migrations/4.0.0-link-taxonomy.md
- instructions/setup-instance.md
- kb/CONTRACT.md
- kb/CONVENTIONS.md
- kb/CONVENTIONS.md.template
- kb/comparisons/COLLECTION.md
- kb/concepts/COLLECTION.md
- kb/entities/COLLECTION.md
- kb/sources/COLLECTION.md
- tools/CONTRACT.md
- tools/README.md
- tools/chemenu/blocks.py
- tools/chemenu/cli.py
- tools/chemenu/commands/cite_cmd.py
- tools/chemenu/commands/dist_cmd.py
- tools/chemenu/commands/docs_verify.py
- tools/chemenu/commands/doctor.py
- tools/chemenu/commands/links_cmd.py
- tools/chemenu/commands/migrate_cmd.py
- tools/chemenu/commands/new_page.py
- tools/chemenu/commands/page_ops.py
- tools/chemenu/commands/run_budget.py
- tools/chemenu/commands/xref.py
- tools/chemenu/conventions.py
- tools/chemenu/corpus_diff.py
- tools/chemenu/frontmatter_io.py
- tools/chemenu/kb_collections.py
- tools/chemenu/kb_state.py
- tools/chemenu/links.py
- tools/chemenu/lint_core.py
- tools/chemenu/provenance.py
- tools/chemenu/sections.py
- tools/chemenu/tests/conftest.py
- tools/chemenu/tests/test_blocks.py
- tools/chemenu/tests/test_cite_cmd.py
- tools/chemenu/tests/test_conventions.py
- tools/chemenu/tests/test_dist_cmd.py
- tools/chemenu/tests/test_doctor.py
- tools/chemenu/tests/test_migrate_cmd.py
- tools/chemenu/tests/test_new_page.py
- tools/chemenu/tests/test_pipeline_l0.py
- tools/chemenu/tests/test_types_cmd.py
- tools/chemenu/tests/test_xref.py
- types/concept.schema.yaml
- types/entity.md
- types/entity.schema.yaml
- types/instruction.schema.yaml
- types/type-spec.md
- work/link-taxonomy-migration/README.md
- work/link-taxonomy-migration/plan.md

work/link-taxonomy-migration/README.md

@@ -0,0 +1,88 @@
+# Workshop: link-taxonomy-migration
+
+- **Run key:** `link-taxonomy-migration` (this directory's name - there is no other identifier)
+- **Input:** none - this run is not an ingest
+- **Started:** 2026-09-02
+- **Session id form:** `WIKITOOL_SESSION_ID="link-taxonomy-migration/u<N>"`, one per unit
+- **Issue:** Gitea #40, sections *Label werden Enum* and *Toolgeführte Blöcke*
+
+## Goal
+
+Move every relationship in `kb/` from free-text German prose in a body bullet to a machine
+value in `related:`, and every tool-owned body region from heading-matching to a marker pair.
+Afterwards the compiler contains no heading text and no relationship label, and `lint` can
+enforce the vocabulary because there is one.
+
+## Why this is `assisted` and not `mechanical`
+
+Measured on 2026-09-02, against the corpus rather than against the documentation:
+
+| | |
+|---|---|
+| Pages | 180 |
+| Distinct relationship labels in body bullets | **152** |
+| Labelled bullets | 337 |
+| Labels occurring exactly once | 102 |
+| Top 20 labels cover | 167 of 337 |
+| Bare `- [[X]]` bullets under `## Siehe auch` | 555 |
+| ...of those, provably redundant (a labelled edge already exists) | 353 |
+| ...of those, the only connection between the two pages | **202**, across 63 target pages |
+
+`kb/CONVENTIONS.md` documents thirteen labels. Nothing ever checked that, and the corpus does
+not follow it - so there is no mapping table to apply, and roughly 539 edges need a judgment
+call each. A large minority are reverse directions (`Verwendet von` 20x, `implementiert durch`,
+`Ersetzt durch`), which under authored directional edges are exactly the edges that stop being
+stored and start being rendered.
+
+Rejected alternative, recorded so it is not re-proposed: map the top 20 mechanically and set
+everything else to `see-also`. That would start the new taxonomy with ~370 of ~539 edges on its
+weakest label - the `verwandt mit` sediment this whole change exists to end, re-created as the
+documented initial state.
+
+## Closes when
+
+Every unit in `plan.md` is published, and:
+
+- `wikitool lint` reports zero unlabelled edges and zero labels outside the authorising
+  collection's `outbound:` block
+- `wikitool migrate verify --from <pre-migration rev>` reports no wikilink or citation count
+  change, and no unbalanced marker
+- `wikitool migrate done 4.0.0 --pages <N>` has run
+
+## Checklist
+
+- [x] u0 mechanism - taxonomy, `links.py`, `blocks.py`, `xref` rewrite, lint checks,
+      `links show` for the inbound view, deletion of the matching layer. No page touched.
+- [ ] u1 `kb/entities/` (systems, tools, technologies)
+- [ ] u2 `kb/entities/` (projects, people) + `kb/comparisons/`
+- [ ] u3 `kb/concepts/`
+- [ ] u4 `kb/sources/`
+- [ ] u5 close-out - `migrate done`, version bump, `CHANGES.md`, workshop close
+
+## Measured after u0
+
+`lint` against the corpus, with the machinery in place and no page touched:
+
+| Finding | Count |
+|---|---|
+| `unlabelled_edges` | **480** - every `related:` entry, since none carries a label yet |
+| `unauthorised_labels` | 0 - nothing declares a label at all, so nothing can be unauthorised |
+| `malformed_edges` | 0 |
+| `unbalanced_markers` | 0 |
+| `orphan_pages` | 1 (`GRUB`, pre-existing) |
+| `broken_links`, `dangling_frontmatter_refs`, `schema_validation_errors` | 0 |
+
+480 is the number u1-u4 have to bring to zero. It is larger than the 337 labelled body bullets
+because `related:` also holds entries whose bullet was lost or never written - which is itself a
+finding: the frontmatter and the body had already drifted apart under the old model, and nothing
+could see it while the label lived only in the prose.
+
+## Open decisions
+
+- **Settled 2026-09-02:** edges are directional; the reverse edge is authored only when it is a
+  primary statement on its own page. The inbound view is rendered, not stored.
+- **Settled 2026-09-02:** the 353 provably-redundant `## Siehe auch` edges are dropped
+  mechanically. The 202 that are the only connection get a real label each, or are dropped with
+  a reason - never converted to `see-also` in bulk.
+- **Settled 2026-09-02:** labels are not localized. `- **depends-on:** [[Hermes]]` is what a
+  German page carries.