Describe a milestone as one delivery group released by one plan, and make a fix found during it ride in the group

00-META/process/07-feature-branches.md

@@ -57,8 +57,13 @@ opened once and delivered once. It is never cut into steps for its size or for t
 merge check, an Approve and a delivery plan of waiting, so the fewest cuts is the fastest. Milestones are cut by
 release order when the design is broken up (playbook [04](04-build-handoff.md)); a release-order dependency found
 inside a milestone is a fault of that cut, said to the operator, never a silent extra step.
-mesh-sdk and mesh-controller each have one release per milestone: a small fix in either rides with it, as
-playbook [08](08-small-fixes.md) says.
+A milestone is one piece of functionality, possibly spanning several modules, repositories and dependencies such as
+an SDK change (the operator, 2026-10-21). Its pull requests in every repository share the milestone's branch name,
+so they are one delivery group (ADR 0482, which holds that a change across repositories is one group, one plan and
+one Approve, and that its developer orders no release). Nothing of the milestone merges until every issue of it is
+built, reviewed and checked; then the one Approve and one tiered delivery plan release it all, the plan's tiers
+keeping a dependency such as the SDK before its dependents. A small fix found during the milestone rides in this
+group, as playbook [08](08-small-fixes.md) says.
 
 **One design is built at a time** (the operator, 2026-10-17). While the milestones of one design are being
 built, no milestone of another design starts: its issues stay `open`, and nobody moves them to `diagnosing` or

00-META/process/08-small-fixes.md

@@ -16,14 +16,13 @@ hour is a feature.
 
 **Who runs it.** Anyone who writes code, engineers and agents alike.
 
-**A fix to mesh-sdk or mesh-controller rides with the milestone's release** (the operator, 2026-10-21, after a day
-with ten mesh-sdk merges, each rebuilding about forty dependent modules, and eight mesh-controller merges, each
-sending a delivery to every node). Playbook [07](07-feature-branches.md) makes a milestone one release; mesh-sdk
-and mesh-controller each have one release per milestone, and a small fix in either does not merge alone. It is
-built on a branch of its own as above, but merged into the running milestone's branch of that repository (playbook 07's shared feature branch)
-and reviewed there with the rest of the release. The exception is a fault that is broken for the operator now
-(something they see failing at this moment): it goes alone as a small fix, and the lead's report says why. With no
-milestone running in that repository, the fix starts one release of its own.
+**A fix found during a milestone rides in that milestone's group** (the operator, 2026-10-21, after a day with ten
+mesh-sdk merges, each rebuilding about forty dependent modules, and eight mesh-controller merges, each sending a
+delivery to every node). Playbook [07](07-feature-branches.md) makes a milestone one piece of functionality
+released once as one delivery group (ADR 0482). A small fix in a repository the running milestone touches, mesh-sdk
+and mesh-controller above all, is built as below but on the milestone's branch, so its pull request joins the group
+and merges with it. The exception is a fault that is broken for the operator now (something they see failing at
+this moment): it goes alone as a small fix, and the lead's report says why.
 
 ## The aim
 
@@ -126,8 +125,8 @@ reading itself and uses one subagent only for the review.
   (`git grep -n '<issue>/AC<n>'`); one without is step 1 skipped.
 - An issue in `fixing` with nobody on it shows in `issue-tracker.list` with `flag: abandoned`; a stopped fix
   moves it back to `open` with its note.
-- A fix in mesh-sdk or mesh-controller is named in the lead's report with the release it rides with, or with the
-  reason it went alone; `mesh-delivery.deliveries` shows at most one merge of each of these repositories per
-  milestone, plus the reported exceptions. A second merge without a reported reason is this rule skipped.
+- A fix found during a milestone is named in the lead's report with the group it rides in, or with the reason it
+  went alone. `mesh-delivery.deliveries` shows the milestone's members in one group and one delivery plan per
+  milestone; a merge of mesh-sdk or mesh-controller outside the group, with no reported reason, is this rule skipped.
 - The repository's own clone says `main` (`git -C <clone> branch --show-current`); another branch there is a
   fix built outside a worktree (issue 1010).

00-META/process/playbooks.html

@@ -473,11 +473,11 @@ const P = [
  {n:"08",name:"Small fixes",kind:"build",c:"--build",
   trig:"One issue in one repository, about an hour of work.",
   who:"The session, with one reviewer on the larger model.",
-  steps:["Read the issue and the code; settle any open question.","Write the acceptance criteria.","Move the issue to fixing.","Build on fix/<issue>-<slug> in its own worktree.","A test that fails today first, on behaviour. (new)","Push and try before the review. (new)","One review of the commit and its try.","Push the reviewed head; open the pull request.","The operator's Approve; the merge; the delivery plan.","Prove the fix live and resolve the same hour.","In mesh-sdk or mesh-controller: ride with the milestone's release, unless broken for the operator now. (new)"],
+  steps:["Read the issue and the code; settle any open question.","Write the acceptance criteria.","Move the issue to fixing.","Build on fix/<issue>-<slug> in its own worktree.","A test that fails today first, on behaviour. (new)","Push and try before the review. (new)","One review of the commit and its try.","Push the reviewed head; open the pull request.","The operator's Approve; the merge; the delivery plan.","Prove the fix live and resolve the same hour.","During a milestone: ride in its delivery group, unless broken for the operator now. (new)"],
   prod:"One pull request, one delivery, a resolved issue.",
   next:"—",bounds:"About an hour · one try before the review, one review, one check",
-  prev:["A fix reviewed after its pull request opened","A long part run twice","A fix waiting on someone else's delivery","Ten SDK merges and eight controller merges in a day"],
-  check:"The forge's checks; the review record; the tracker's move; one merge of each shared repository per milestone."},
+  prev:["A fix reviewed after its pull request opened","A long part run twice","A fix waiting on someone else's delivery","Ten SDK merges and eight controller merges in a day, one per fix"],
+  check:"The forge's checks; the review record; the tracker's move; one delivery group and one delivery plan per milestone."},
  {n:"09",name:"Cleanup",kind:"side",c:"--side",
   trig:"The operator asks, or merged branches, stale pull requests and old worktrees pile up.",
   who:"A session on the operator's word; the operator decides every deletion.",