diff --git a/.agents/skills/backlog-burndown/SKILL.md b/.agents/skills/backlog-burndown/SKILL.md
index 631c1bc7..b2a31609 100644
--- a/.agents/skills/backlog-burndown/SKILL.md
+++ b/.agents/skills/backlog-burndown/SKILL.md
@@ -330,7 +330,7 @@ what it leaves to judgment here. The tier is chosen per group rather than defaul
 stronger tier produces better work and takes fewer review rounds to land it. That often
 costs less than a cheaper worker looping. The tier is `frontier` or `standard`, never `bulk`, since
 every worker judges its pull request's review findings. It is `highest` only where the maintainer
-named it for this run. These kinds of group are never tiered
+named it for this run. Groups of these kinds are never tiered
 below `frontier`:
 
 - One touching **carried canonical content**, as `GOVERNANCE.md` "Verification Discipline" bounds
diff --git a/.claude-plugin/fleet-skills/.source-digests/backlog-burndown b/.claude-plugin/fleet-skills/.source-digests/backlog-burndown
index 4707bb7e..5573af9d 100644
--- a/.claude-plugin/fleet-skills/.source-digests/backlog-burndown
+++ b/.claude-plugin/fleet-skills/.source-digests/backlog-burndown
@@ -1 +1 @@
-c3f8d3afecf7d599
+1ce0fe48128d5dac
diff --git a/.claude-plugin/fleet-skills/skills/backlog-burndown/SKILL.md b/.claude-plugin/fleet-skills/skills/backlog-burndown/SKILL.md
index 631c1bc7..b2a31609 100644
--- a/.claude-plugin/fleet-skills/skills/backlog-burndown/SKILL.md
+++ b/.claude-plugin/fleet-skills/skills/backlog-burndown/SKILL.md
@@ -330,7 +330,7 @@ what it leaves to judgment here. The tier is chosen per group rather than defaul
 stronger tier produces better work and takes fewer review rounds to land it. That often
 costs less than a cheaper worker looping. The tier is `frontier` or `standard`, never `bulk`, since
 every worker judges its pull request's review findings. It is `highest` only where the maintainer
-named it for this run. These kinds of group are never tiered
+named it for this run. Groups of these kinds are never tiered
 below `frontier`:
 
 - One touching **carried canonical content**, as `GOVERNANCE.md` "Verification Discipline" bounds
diff --git a/.github/skills/backlog-burndown/SKILL.md b/.github/skills/backlog-burndown/SKILL.md
index 631c1bc7..b2a31609 100644
--- a/.github/skills/backlog-burndown/SKILL.md
+++ b/.github/skills/backlog-burndown/SKILL.md
@@ -330,7 +330,7 @@ what it leaves to judgment here. The tier is chosen per group rather than defaul
 stronger tier produces better work and takes fewer review rounds to land it. That often
 costs less than a cheaper worker looping. The tier is `frontier` or `standard`, never `bulk`, since
 every worker judges its pull request's review findings. It is `highest` only where the maintainer
-named it for this run. These kinds of group are never tiered
+named it for this run. Groups of these kinds are never tiered
 below `frontier`:
 
 - One touching **carried canonical content**, as `GOVERNANCE.md` "Verification Discipline" bounds