build: Add CI failure summary script and automation config

- Add .claude/scripts/ci-failure-summary.sh for quick CI failure diagnosis
- Add .claude/ci-automation.yaml for CI automation configuration

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: randlee

.claude/ci-automation.yaml

@@ -0,0 +1,16 @@
+# CI Automation Configuration for roslyn-diff
+# .NET 10 project with xUnit tests
+
+upstream_branch: main
+build_command: dotnet build --configuration Release
+test_command: dotnet test --configuration Release --no-build
+warn_patterns:
+  - "warning CS"
+  - "warning NU"
+allow_warnings: false
+auto_fix_enabled: true
+repo_root: .
+
+# Stack detection
+stack: dotnet
+solution_file: roslyn-diff.sln

.claude/scripts/ci-failure-summary.sh

@@ -0,0 +1,167 @@
+#!/bin/bash
+# CI Failure Summary Script
+# Extracts concise failure information from GitHub Actions logs
+# Usage: ./ci-failure-summary.sh <PR_NUMBER|RUN_ID> [--verbose]
+
+set -e
+
+# Colors for output
+RED='\033[0;31m'
+YELLOW='\033[1;33m'
+GREEN='\033[0;32m'
+CYAN='\033[0;36m'
+BOLD='\033[1m'
+NC='\033[0m' # No Color
+
+VERBOSE=false
+INPUT="$1"
+
+if [[ "$2" == "--verbose" ]]; then
+    VERBOSE=true
+fi
+
+if [[ -z "$INPUT" ]]; then
+    echo -e "${RED}Usage: $0 <PR_NUMBER|RUN_ID> [--verbose]${NC}"
+    echo "  PR_NUMBER: e.g., 29"
+    echo "  RUN_ID: e.g., 12345678"
+    exit 1
+fi
+
+# Determine if input is PR number or run ID
+if [[ "$INPUT" =~ ^[0-9]+$ ]] && [[ ${#INPUT} -lt 6 ]]; then
+    # Likely a PR number (< 6 digits)
+    PR_NUM="$INPUT"
+    echo -e "${CYAN}=== CI Failure Summary for PR #${PR_NUM} ===${NC}\n"
+
+    # Get PR info
+    PR_INFO=$(gh pr view "$PR_NUM" --json title,headRefName,baseRefName,state 2>/dev/null || echo "{}")
+    if [[ "$PR_INFO" != "{}" ]]; then
+        TITLE=$(echo "$PR_INFO" | jq -r '.title')
+        HEAD=$(echo "$PR_INFO" | jq -r '.headRefName')
+        BASE=$(echo "$PR_INFO" | jq -r '.baseRefName')
+        echo -e "${BOLD}PR:${NC} $TITLE"
+        echo -e "${BOLD}Branch:${NC} $HEAD → $BASE\n"
+    fi
+
+    # Get check status
+    echo -e "${BOLD}Check Status:${NC}"
+    gh pr checks "$PR_NUM" 2>/dev/null | while read -r line; do
+        if echo "$line" | grep -q "fail\|X"; then
+            echo -e "  ${RED}✗${NC} $line"
+        elif echo "$line" | grep -q "pass\|✓"; then
+            echo -e "  ${GREEN}✓${NC} $line"
+        else
+            echo "  $line"
+        fi
+    done
+    echo ""
+
+    # Get the failed run ID
+    RUN_ID=$(gh run list --branch "$(echo "$PR_INFO" | jq -r '.headRefName')" --limit 1 --json databaseId,conclusion --jq '.[0].databaseId' 2>/dev/null)
+else
+    # Assume it's a run ID
+    RUN_ID="$INPUT"
+    echo -e "${CYAN}=== CI Failure Summary for Run #${RUN_ID} ===${NC}\n"
+fi
+
+if [[ -z "$RUN_ID" ]]; then
+    echo -e "${YELLOW}No recent runs found${NC}"
+    exit 0
+fi
+
+# Get run status
+RUN_INFO=$(gh run view "$RUN_ID" --json conclusion,status,jobs 2>/dev/null || echo "{}")
+CONCLUSION=$(echo "$RUN_INFO" | jq -r '.conclusion // "in_progress"')
+STATUS=$(echo "$RUN_INFO" | jq -r '.status')
+
+echo -e "${BOLD}Run #${RUN_ID}:${NC} $STATUS ($CONCLUSION)\n"
+
+# List failed jobs
+echo -e "${BOLD}Failed Jobs:${NC}"
+FAILED_JOBS=$(echo "$RUN_INFO" | jq -r '.jobs[] | select(.conclusion == "failure") | .name' 2>/dev/null)
+if [[ -z "$FAILED_JOBS" ]]; then
+    echo -e "  ${GREEN}No failed jobs${NC}\n"
+else
+    echo "$FAILED_JOBS" | while read -r job; do
+        echo -e "  ${RED}✗${NC} $job"
+    done
+    echo ""
+fi
+
+# Get failed logs and parse them
+echo -e "${BOLD}Failure Details:${NC}"
+FAILED_LOG=$(gh run view "$RUN_ID" --log-failed 2>/dev/null || echo "")
+
+if [[ -z "$FAILED_LOG" ]]; then
+    echo -e "  ${GREEN}No failure logs available${NC}"
+    exit 0
+fi
+
+# Save raw log for verbose mode
+if [[ "$VERBOSE" == true ]]; then
+    echo "$FAILED_LOG" > /tmp/ci-failure-raw.log
+    echo -e "  ${CYAN}Raw log saved to /tmp/ci-failure-raw.log${NC}\n"
+fi
+
+# Extract .NET test failures
+echo -e "\n${YELLOW}── Test Failures ──${NC}"
+TEST_FAILURES=$(echo "$FAILED_LOG" | grep -E "Failed\s+\w+|✗.*\[FAIL\]|\[xUnit.*\].*Failed" | head -20 || true)
+if [[ -n "$TEST_FAILURES" ]]; then
+    echo "$TEST_FAILURES" | while read -r line; do
+        # Clean up the line - remove timestamps and job prefixes
+        CLEAN=$(echo "$line" | sed 's/^.*\t//' | sed 's/^[0-9T:.-]*Z //')
+        echo -e "  ${RED}✗${NC} $CLEAN"
+    done
+else
+    echo -e "  ${GREEN}No test failures found${NC}"
+fi
+
+# Extract assertion errors (expected vs actual)
+echo -e "\n${YELLOW}── Assertion Details ──${NC}"
+ASSERTIONS=$(echo "$FAILED_LOG" | grep -iE "Expected.*to be|Expected.*but found|Actual:|expected.*got|should be.*but|difference of" | grep -v "Passed" | head -15 || true)
+if [[ -n "$ASSERTIONS" ]]; then
+    echo "$ASSERTIONS" | while read -r line; do
+        CLEAN=$(echo "$line" | sed 's/^.*\t//' | sed 's/^[0-9T:.-]*Z //')
+        echo "  $CLEAN"
+    done
+else
+    echo -e "  ${GREEN}No assertion details found${NC}"
+fi
+
+# Extract build errors
+echo -e "\n${YELLOW}── Build Errors ──${NC}"
+BUILD_ERRORS=$(echo "$FAILED_LOG" | grep -E "error CS[0-9]+:|error NU[0-9]+:|error MSB[0-9]+:" | head -10 || true)
+if [[ -n "$BUILD_ERRORS" ]]; then
+    echo "$BUILD_ERRORS" | while read -r line; do
+        CLEAN=$(echo "$line" | sed 's/^.*\t//' | sed 's/^[0-9T:.-]*Z //')
+        echo -e "  ${RED}$CLEAN${NC}"
+    done
+else
+    echo -e "  ${GREEN}No build errors found${NC}"
+fi
+
+# Extract timeout/performance issues
+echo -e "\n${YELLOW}── Timeouts/Performance ──${NC}"
+TIMEOUTS=$(echo "$FAILED_LOG" | grep -iE "timeout|timed out|exceeded|too slow|milliseconds|elapsed" | grep -iE "fail|error|exceed" | grep -v "Passed" | head -10 || true)
+if [[ -n "$TIMEOUTS" ]]; then
+    echo "$TIMEOUTS" | while read -r line; do
+        CLEAN=$(echo "$line" | sed 's/^.*\t//' | sed 's/^[0-9T:.-]*Z //')
+        echo -e "  ${YELLOW}$CLEAN${NC}"
+    done
+else
+    echo -e "  ${GREEN}No timeout issues found${NC}"
+fi
+
+# Extract exception stack traces (just the exception line, not full stack)
+echo -e "\n${YELLOW}── Exceptions ──${NC}"
+EXCEPTIONS=$(echo "$FAILED_LOG" | grep -E "Exception:|Error:|System\.\w+Exception" | grep -v "^[[:space:]]*at " | head -10 || true)
+if [[ -n "$EXCEPTIONS" ]]; then
+    echo "$EXCEPTIONS" | while read -r line; do
+        CLEAN=$(echo "$line" | sed 's/^.*\t//' | sed 's/^[0-9T:.-]*Z //')
+        echo -e "  ${RED}$CLEAN${NC}"
+    done
+else
+    echo -e "  ${GREEN}No exceptions found${NC}"
+fi
+
+echo -e "\n${CYAN}=== End Summary ===${NC}"