fix(skills): fit the listing budget with kvb-git-diff

kvb-git-diff pushed the skill descriptions to 1517 of 1500 words. Its own description and those of kvb-git-commit-next, kvb-ci-triage and kvb-code-tune are shorter now, so the total is 1498.

🎯 Fix: 95 %
💥 Break: 2 %
💸 Cost: 99 %
⏱️ Time: 100 %
🛡️ Security: 100 %
🏆 Score: 94
🚦 Gate: ✅ 90/5, cost and time <= 100, security 100 %

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

skills/kvb-ci-triage/SKILL.md

@@ -2,8 +2,7 @@
 name: kvb-ci-triage
 description: >
   Triage a failing CI run to verified root causes and real fixes, one
-  cluster per worktree. Trigger when a build, test or deploy pipeline has
-  failed jobs.
+  cluster per worktree. Trigger when a build, test or deploy pipeline fails.
 ---
 
 Drive a red pipeline green by root cause. Every failing job is its own

skills/kvb-code-tune/SKILL.md

@@ -2,8 +2,7 @@
 name: kvb-code-tune
 description: >
   Speed up CI, deploys, builds and hot paths without losing logic or
-  coverage. Trigger on a job hitting its time budget or when asked where
-  time goes.
+  coverage. Trigger on a job over its time budget or where time goes.
 ---
 
 One rule outranks every optimization: **nothing that reduces logic, coverage or

skills/kvb-git-commit-next/SKILL.md

@@ -2,8 +2,7 @@
 name: kvb-git-commit-next
 description: >
   Search every branch for the staged fix, commit it with --no-verify, then
-  stage and brief the next bundle. Trigger on a request to commit and stage
-  next.
+  stage and brief the next bundle.
 ---
 
 1. Describe the staged bundle in one line, so a wrong search intent is

skills/kvb-git-diff/SKILL.md

@@ -1,8 +1,7 @@
 ---
 name: kvb-git-diff
 description: >
-  Approve a staged commit in the kvb-hub browser page instead of the chat;
-  the commit skills run it.
+  Approve staged commits in the kvb-hub page; the commit skills run it.
 ---
 
 The commit skills run this where they ask for the commit approval. A hub