feat: Autorenkonventionen nach Eigentum geschnitten - kb/CONVENTIONS.md, deklarierte Collections (3.0.0)

Files changed:
- .gitea/workflows/ci.yml
- .wikitool-kb.json
- AGENTS.md
- CHANGES.md
- INSTALL.md
- README.md
- VERSION
- instructions/CONTRACT.md
- instructions/dev/testing-conventions.md
- instructions/german-terminology.md
- instructions/kb-profiles.md
- instructions/migrations/3.0.0-authoring-conventions.md
- instructions/private-instance.md
- instructions/setup-instance.md
- instructions/wiki-ingest/SKILL.md
- instructions/wiki-manage/SKILL.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/commands/dist_cmd.py
- tools/chemenu/commands/docs_verify.py
- tools/chemenu/commands/doctor.py
- tools/chemenu/commands/new_page.py
- tools/chemenu/conventions.py
- tools/chemenu/kb_collections.py
- tools/chemenu/kb_scan.py
- tools/chemenu/provenance.py
- tools/chemenu/sections.py
- tools/chemenu/tests/conftest.py
- tools/chemenu/tests/test_conventions.py
- tools/chemenu/tests/test_dist_cmd.py
- tools/chemenu/tests/test_doctor.py
- tools/chemenu/tests/test_new_page.py
- tools/chemenu/tests/test_types_cmd.py
- types/comparison.md
- types/concept.md
- types/entity.md
- types/source.md
- types/type-spec.md

tools/README.md

@@ -39,7 +39,8 @@ tools/
     errors.py              ChemenuError / ValidationError / BackendError
     corpus_cache.py        one parsed corpus per commit, never cached while the tree is dirty
     kb_scan.py             page iteration/loading over kb/
-    kb_collections.py      collection discovery (a directory with COLLECTION.md)
+    kb_collections.py      collection discovery (a directory with COLLECTION.md), and what one declares about itself
+    conventions.py         kb/CONVENTIONS.md: what this instance decided about authoring, as opposed to what the stack enforces
     type_resolver.py       type-spec loading and schema resolution
     lint_core.py           the lint checks and the report, with no CLI attached
     types_core.py          type-spec listing/description, with no CLI attached
@@ -110,15 +111,23 @@ procedure written down in advance is one an agent can complete alone. Whether
 a human *actually* saw it is not enforced here - that question is answered in
 the eval layer (`evals/trajectory.py`, `clearance-ended-the-turn`).
 
-**Section names are a vocabulary, not literals.** `xref add` writes into Relationships and See
-Also, and `cite add` owns the trailing Footnotes block, so those three headings are structure the
-tool matches on. They are named once in `sections.py`, and each has one canonical spelling - what
-the tool writes - plus aliases it still recognizes. That asymmetry is what let the wiki be
-translated page by page instead of atomically: an untranslated `## Relationships` is still found
-and appended to. Dropping an alias is therefore a breaking change for any page not yet converted,
-not a cleanup. Renaming a heading is a migration's job; no other command may do it as a side
-effect (see `cite_block_heading` in `provenance.py`, which exists solely so `cite sync` stays a
-no-op on an untranslated page).
+**Section names are a vocabulary, not literals - and not the stack's.** `xref add` writes into
+Relationships and See Also, and `cite add` owns the trailing Footnotes block, so those three
+headings are structure the tool matches on. *Which words they are* is the corpus's own answer:
+`conventions.py` reads them from `kb/CONVENTIONS.md`, `sections.py` resolves them on access
+(PEP 562, the way `config` resolves its paths), and no heading text is written down in Python
+except the pre-conventions fallback for an instance that has not declared one yet.
+
+Each slot has one canonical spelling - what the tool writes - plus aliases it still recognizes.
+That asymmetry is what let the wiki be translated page by page instead of atomically: an
+untranslated `## Relationships` is still found and appended to. Dropping an alias is therefore a
+breaking change for any page not yet converted, not a cleanup. Renaming a heading is a
+migration's job; no other command may do it as a side effect (see `cite_block_heading` in
+`provenance.py`, which exists solely so `cite sync` stays a no-op on an untranslated page).
+
+Because the value is resolved rather than bound, nothing may capture it at import time - not a
+module constant, not an evaluated default argument. That is why `provenance.CITE_BLOCK_HEADING`
+is a module `__getattr__` and `render_cite_block(heading=None)` resolves inside the call.
 
 **Generated output is never committed.** `reports/`, `.agents/skills/` and
 `.claude/skills/` are build output; `docs verify` carries canaries in both