Chemenu 2.1.0 - deterministischer Wissenskompiler

Chemenu kompiliert Rohnotizen zu einem verlinkten, quellengebundenen Wiki:
raw/ -> types/ + tools/ -> kb/ -> reports/. Was mechanisch ist, macht
tools/wikitool; was Urteil braucht, macht ein Agent unter Contracts, deren
Grenzen in Code durchgesetzt sind statt im Prompt.

Dieser Commit ist der Startpunkt der oeffentlichen Historie. Die vorherige
Entwicklung fand in einer privaten Instanz statt und ist nicht Teil dieses
Repositorys; ihre Erzaehlung steht vollstaendig in CHANGES.md, das mit 44
Eintraegen von 0.1.0 bis 2.1.0 erhalten geblieben ist.

Der mitgelieferte Korpus ist ein Testbett und eine Demo: 170 Seiten ueber den
Stack selbst - Gates, Lint, Versionierung, Suche, das Wiki-Muster. Er
dokumentiert das Werkzeug mit den eigenen Mitteln des Werkzeugs.

Lizenz: AGPL-3.0 fuer den Stack (tools/, types/), CC-BY-4.0 fuer die Inhalte.
Die Grenze zwischen beiden ist der Dateiplan, den dist export berechnet -
siehe NOTICE.

kb/concepts/COLLECTION.md

@@ -0,0 +1,45 @@
+# kb/concepts/ - Collection Contract
+
+Ideas rather than things: architectures, patterns, protocols, workflows, recurring problems,
+and the decisions taken about them. A concept explains *how* or *why*, where an entity page
+records *what*.
+
+**Quality goal:** explanatory sufficiency - the page should answer *why it is done this way*
+without the reader having to open the entity pages that use it. If the explanation only makes
+sense once you already know the system, it is on the wrong page.
+
+Inherits [kb/CONTRACT.md](../CONTRACT.md) - naming, tone, linking, provenance and confidence
+are defined there and are not restated here.
+
+## Types offered
+
+`concept` (`tools/wikitool types describe concept`).
+
+## Decisions and ADRs
+
+An architectural decision is a concept page prefixed `adr-NNN-`, e.g.
+`adr-001-use-go-modules.md`. It records:
+
+- **Context** - what forced a decision.
+- **Decision** - what was chosen.
+- **Consequences** - what this costs, not only what it buys.
+- **Status** - proposed / accepted / deprecated / superseded.
+- Links to every entity the decision affects.
+
+A superseded ADR is never deleted or rewritten; a new one supersedes it and both link to the
+other with `replaces` / `replaced by`.
+
+## Outbound linking
+
+A concept links to every entity that implements or uses it. A concept with no inbound entity
+link is usually either premature or misfiled - `wikitool lint` reports it as an orphan.
+
+Where two concepts compete, do not argue the comparison inside either page; create a page in
+`kb/comparisons/` and link both to it.
+
+## What does not belong here
+
+- A concrete, pointable thing - that is an entity.
+- A head-to-head evaluation of alternatives - that is a comparison.
+- Generic textbook explanation with no connection to anything in this wiki. If no entity here
+  uses it, the page is not earning its keep.