fix: address code review comments from PR #79

- Add TEST_GROUPS constant to eliminate magic number
- Use stdout for info messages, stderr for errors only
- Remove redundant comments and dead code
- Add CI check before copying coverage.info
- Unify variable declaration order
- Add port allocation explanation comment
- Restore /* 50ms */ inline comment
- Update CONTRIBUTING.md with build 1 description

ci-build.sh

@@ -40,8 +40,6 @@ readonly COVERAGE_PATTERNS='*/profanity/src/* */src/src/*'
 
 # Parse STATS line from build log and set global variables
 # Usage: parse_build_stats <log_file>
-# Sets: STAT_UNIT_P, STAT_UNIT_F, STAT_FUNC_P, STAT_FUNC_F,
-#       STAT_COV_LINES, STAT_COV_FUNCS, STAT_COV_BRANCHES, STAT_TIME
 parse_build_stats() {
     local log_file="$1"
     local stats_line
@@ -355,7 +353,8 @@ build_and_test() {
         ./profanity -v
 
         # Save coverage.info before cleanup (for CI artifact)
-        if [ "$run_coverage" = "yes" ] && [ -f coverage.info ]; then
+        # Only copy in CI environment to avoid leaving artifacts during local runs
+        if [ "$run_coverage" = "yes" ] && [ -f coverage.info ] && [ -n "$CI" ]; then
             cp coverage.info ../coverage.info
             echo "Coverage report saved to coverage.info"
         fi
@@ -397,8 +396,8 @@ else
         if [ $idx -le ${#tests[@]} ]; then
             # All builds run Valgrind on Linux
             if [ "$ARCH" = "linux" ]; then
-                run_valgrind="yes"
                 extra_flags="--enable-valgrind"
+                run_valgrind="yes"
             else
                 extra_flags=""
                 run_valgrind="no"