fix(docs): AGENTS.md-Contract-Prosa als Sitzungsarbeit klargestellt, doc-pull-through-Instruction (schliesst #90)

Files changed:
- AGENTS.md
- CHANGES.md
- VERSION
- instructions/dev/doc-pull-through.md
- instructions/dev/stack-close/SKILL.md
- instructions/dev/stack-dev/SKILL.md
- instructions/dev/testing-conventions.md
- instructions/dev/version-parts.md
- tools/chemenu/commands/docs_verify.py

AGENTS.md

@@ -289,11 +289,14 @@ Changes to this schema, the contracts, the instruction layer, `tools/wikitool`,
 READMEs go in [CHANGES.md](CHANGES.md) - never in an inline version-history table here. Wiki
 *content* operations are logged separately via `tools/wikitool log append` into `kb/log.md`.
 
-**A stack change is not finished until the human docs describe it.** `README.md`, `EVALS.md`
-and `tools/README.md` are part of the change that introduced a stage, a command or a workflow,
-not follow-up work: nobody comes back for them, and a document that describes a repo which no
-longer exists is worse than none. The mechanical half - command tables, contracts, ignore
-canaries - is checked by `tools/wikitool docs verify`; the prose half is yours.
+**A stack change is not finished until the human docs describe it.** `README.md`, `EVALS.md`,
+`tools/README.md`, `tools/CONTRACT.md` and the touched `<stage>/CONTRACT.md` are part of the
+change that introduced a stage, a command or a workflow, not follow-up work: nobody comes back
+for them, and a document that describes a repo which no longer exists is worse than none. What
+`tools/wikitool docs verify` mechanically checks is exactly what its own `docs verify` row in
+[tools/CONTRACT.md](tools/CONTRACT.md) lists - no more. **Every cell's text is outside that
+check** - a command table entry's description, an error contract's wording, a stage contract's
+prose - and is therefore session work, the same as the three README-shaped files.
 
 `docs/` pages are held to a different clock than those three. A README goes stale on every new
 flag; a `docs/` page goes stale only when the reasoning it wrote down stops holding - a gate