Test: Enforce Vitest conventions and CI guardrails

.github/workflows/static-checks.yml

@@ -124,6 +124,9 @@ jobs:
             - name: Build packages
               run: npm run build
 
+            - name: Validate Vitest conventions and TypeScript test graph
+              run: npm run test:unit:conventions
+
             - name: Check type declaration files
               # Runs against the final package output, including the built
               # declarations and runtime files.

.github/workflows/unit-test.yml

@@ -109,7 +109,8 @@ jobs:
                     --ci \
                     --maxWorkers="$(nproc)" \
                     --shard="$SHARD" \
-                    --cacheDirectory="$HOME/.jest-cache"
+                    --cacheDirectory="$HOME/.jest-cache" \
+                    --passWithNoTests
 
             - name: Run the migrated Vitest partition
               env:

.gitignore

@@ -34,6 +34,7 @@ yarn.lock
 
 .eslintcache
 *.tsbuildinfo
+/test/unit/.vitest-*-typecheck.json
 
 # Generated native views of repository agent skills
 /.claude/skills/