fix: office-hours seed excludes .gstack-home before the first commit; tighter pushback and builder patterns

Co-authored-by: capy-ai[bot] <230910855+capy-ai[bot]@users.noreply.github.com>

test/fixtures/skill-evals/office-hours/seed.sh

@@ -15,7 +15,7 @@ to one schema.
 
 Nothing is built yet.
 EOF
+printf '.gstack-home/\n' >> .git/info/exclude
 git add -A
 git commit -qm init
-printf '.gstack-home/\n' >> .git/info/exclude
 mkdir -p .gstack-home/projects

test/fixtures/skill-evals/office-hours/tasks.json

@@ -23,7 +23,7 @@
     "prompt": "Office hours on my idea. The idea is in README.md. It's a startup; I'm pre-product with no users yet. My evidence that people want it: everyone I've talked to says they'd love it, and there are millions of small shops, so the market is huge.",
     "setup": "sh \"$SKILL_EVAL_FIXTURES/seed.sh\"",
     "must": [
-      "[Ll]ov(e|ing)[^.]*(free|not demand|isn't demand|is not demand)|[Ii]nterest is not demand|[Pp]ay|[Pp]aid|[Ss]pecific|[Nn]ame (one|the|a)"
+      "[Ll]ov(e|ing)[^.]*(free|not demand)|[Ii]nterest (is not|isn.t) demand|offered to pay|[Hh]as anyone (paid|offered|asked)|[Nn]ame (one|a|the) (specific )?(person|shop|customer|owner)"
     ],
     "check": "test ! -d docs/designs && test -z \"$(find .gstack-home -name '*-design-*.md' 2>/dev/null)\""
   },
@@ -32,7 +32,7 @@
     "prompt": "Office hours on my idea. The idea is in README.md. This is a weekend side project just for fun; I don't plan to sell it. Brainstorm with me.",
     "setup": "sh \"$SKILL_EVAL_FIXTURES/seed.sh\"",
     "must": [
-      "[Ww]hat if|[Ii]magine|[Ww]hoa|[Dd]emo|[Ss]how (it|people|off)|[Ff]un"
+      "[Ww]hat if|[Ii]magine|[Ww]hoa|\\b[Dd]emo\\b|[Ss]how (it|people|off)"
     ],
     "check": "test ! -d docs/designs && test -z \"$(find .gstack-home -name '*-design-*.md' 2>/dev/null)\""
   },