feat(evals): add MCP server mocks and fix the cases that measured nothing

.github/workflows/evals.yaml

@@ -82,12 +82,14 @@ jobs:
                 echo "$CHANGED" | { grep -oE '^skills/[^/]+/' || true; } | cut -d/ -f2
                 echo "$CHANGED" | { grep -oE '^evals/[^_][^/]*/' || true; } | cut -d/ -f2
               } | sort -u | while read -r s; do
-                    [ -n "$s" ] && [ -d "evals/$s" ] && echo "$s"
+                    if [ -n "$s" ] && compgen -G "evals/$s/*/case.yaml" >/dev/null; then
+                      echo "$s"
+                    fi
                   done
             )
 
-            if echo "$CHANGED" | grep -qE '^evals/_fixture/'; then
-              echo "fixture changed — widening to all skills"
+            if echo "$CHANGED" | grep -qE '^evals/(_fixture|mocks)/'; then
+              echo "shared eval input changed — widening to all skills"
               SKILLS=$(all_skills)
             fi
           fi

AGENTS.md

@@ -17,7 +17,6 @@ docs/                  # Gitignored, local only
   plan/                # Planning and design documents
 evals/                 # `claude plugin eval` suite — all 15 skills, 100 cases
   README.md            # Case format, grader reference, how to add a case
-  BASELINE.md          # Last full two-arm measurement: per-skill Δ and routing
   _fixture/
     fixture.sh         # The only copy of the neutral Flutter skeleton; every case symlinks here
   <skill>/             # One directory per skill, named for the skill it covers

config/cspell.json

@@ -13,6 +13,7 @@
     "Bienvenido",
     "bypassable",
     "Codex",
+    "compgen",
     "CSPRNG",
     "cupertino",
     "Cupertino",