README.md: Telemetrie-Abschnitt an den installationsformabhaengigen Default angepasst

Files changed:
- README.md

README.md

@@ -329,9 +329,17 @@ AGENTS.md's "Gates" section.
 
 ## Telemetry and evaluation
 
-Every `wikitool` call appends an event to `reports/telemetry/<session>/trace.jsonl`, and the
+In this checkout, every `wikitool` call appends an event to
-hook files under `.github/hooks/` and `.vibe/` add what the agent did between those calls.
+`reports/telemetry/<session>/trace.jsonl`, and the hook files under `.github/hooks/` and
-Nothing leaves the machine: `reports/` is gitignored and no exporter is configured.
+`.vibe/` add what the agent did between those calls. Nothing leaves the machine: `reports/` is
+gitignored and no exporter is configured.
+
+**A distributed instance records nothing unless it asks to.** The default follows the
+installation form - on for a git clone of this repo, where the traces are the stack's own
+measuring instrument, off for a `dist export` tarball, where nobody ordered telemetry. Two
+quantity caps apply either way: 5 MiB per session trace, and 250 session directories.
+`wikitool doctor` reports which state a checkout is in and why; EVALS.md § "Whether it runs at
+all" has the precedence rules and the opt-in file.
 
 That record is what makes it possible to ask how a session *worked*, not just what it left
 behind: