docs(agents): one Copilot review per PR, not one per push

CLAUDE.md

@@ -37,7 +37,7 @@ After opening a PR, the work is **not** complete. Stay with the PR until both th
 
 1. **Watch the pipeline.** Poll `gh pr checks <num>` (and Cloud Build for triggered deploys) until every required check has finished. Use a background bash poll so other work can continue. Default: poll every 20 s, up to ~10 min per check.
 2. **Fix CI failures.** If any check fails, read the relevant log (`gh run view --log-failed`, `gcloud builds log <id>`), push a fix commit to the same branch, then keep watching. Repeat until green.
-3. **Wait for the Copilot PR Reviewer bot** (and any other auto-review bots active on this repo). Typically lands within ~2 min of PR open. Fetch with `gh pr view <num> --comments`, plus the three GitHub APIs that surface different comment types — `gh api` resolves `{owner}/{repo}` from the current git remote so these are copy/paste-portable:
+3. **Wait for the Copilot PR Reviewer bot — ONE review per PR, not one per push.** Review-on-push is off in the "Automated Copilot Code Review" ruleset (owner, 2026-09-03): the bot runs once when the PR opens or leaves draft, and a push triggers nothing. Don't re-request a review after every push. Each request is a full re-read of the whole diff, and the bot then surfaces "previously missed" findings in files the push never touched — which draws another push, which draws another request (the sibling repo's [kurrentschrift#406](https://github.com/MarkusNeusinger/kurrentschrift/pull/406) collected ~15 requests in a day over a one-line docstring fix). Request a fresh review explicitly only after a SUBSTANTIVE rework (new behaviour, a reworked mechanism), and stop once a round yields no new inline comments but only carried-over items: the field is grazed. A PR that is green with no open threads needs no further round — say so and let the owner merge. The first review typically lands within ~2 min of PR open. Fetch with `gh pr view <num> --comments`, plus the three GitHub APIs that surface different comment types — `gh api` resolves `{owner}/{repo}` from the current git remote so these are copy/paste-portable:
    - `gh api repos/{owner}/{repo}/pulls/<num>/reviews` — top-level review summaries (Copilot's overall comment lives here)
    - `gh api repos/{owner}/{repo}/pulls/<num>/comments` — inline review comments tied to file/line
    - `gh api repos/{owner}/{repo}/issues/<num>/comments` — generic PR conversation comments (codecov, deployment bots, humans)

agentic/commands/pull_request.md

@@ -58,6 +58,10 @@ EOF
 
 7. If step 4 added changelog entries without a PR reference, append the new PR number to those
    bullets (e.g. `(#1234)`) and push the follow-up commit.
+8. **The Copilot review runs ONCE**, when the PR opens (or leaves draft) — review-on-push is off in
+   the "Automated Copilot Code Review" ruleset (owner, 2026-09-03), so step 7's follow-up commit and
+   every later push trigger nothing. Do not re-request a review per push; the rule and its one
+   exception (a substantive rework) are in `CLAUDE.md` § "PR Follow-Through", step 3.
 
 ## Report
 

changelog.d/copilot-review-cadence.md

@@ -0,0 +1,12 @@
+### Changed
+
+- **The agent instructions say what the Copilot review ruleset now does: one review per PR, not
+  one per push** — review-on-push was turned off in the "Automated Copilot Code Review" ruleset of
+  both repositories on 2026-09-03, so the bot runs once when a PR opens or leaves draft and a push
+  triggers nothing. `CLAUDE.md`'s PR follow-through and `agentic/commands/pull_request.md` now say
+  so, and say not to re-request one per push: each request is a full re-read of the whole diff, and
+  the bot then surfaces "previously missed" findings in files the push never touched — which draws
+  another push, and another request (the sibling repo's
+  [kurrentschrift#406](https://github.com/MarkusNeusinger/kurrentschrift/pull/406) collected ~15 in
+  a day over a one-line docstring fix). A fresh review is requested only after a substantive
+  rework, and a PR that is green with no open threads needs no further round. (#11216)