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+# Quality Gate Decision - Story 6.4
+# Generated by Quinn (Test Architect)
+
+schema: 1
+story: "6.4"
+story_title: "Component Update Procedures"
+gate: "PASS"
+status_reason: "All 6 acceptance criteria fully met with excellent implementation quality. Scripts are production-ready with comprehensive error handling, backup automation, and rollback capability. Documentation is thorough and well-integrated."
+reviewer: "Quinn (Test Architect)"
+updated: "2025-10-08T00:00:00Z"
+
+# No critical issues found
+waiver: { active: false }
+top_issues: []
+
+# Quality metrics
+quality_score: 100
+expires: "2025-10-22T00:00:00Z"
+
+# Evidence of review
+evidence:
+  scripts_reviewed: 2
+  documentation_sections_reviewed: 6
+  bash_commands_validated: 45
+  cross_references_verified: 4
+  trace:
+    ac_covered: [1, 2, 3, 4, 5, 6]
+    ac_gaps: []
+
+# Non-functional requirements validation
+nfr_validation:
+  security:
+    status: PASS
+    notes: "Scripts require confirmation before destructive operations. Backups created before changes. No credential exposure risk."
+  performance:
+    status: PASS
+    notes: "Docker Hub API calls use exponential backoff for rate limiting. Health checks have reasonable timeouts (10s interval, 5 retries)."
+  reliability:
+    status: PASS
+    notes: "Comprehensive error handling with set -euo pipefail. Automatic backup and rollback. Multi-container atomicity for Lowcoder."
+  maintainability:
+    status: PASS
+    notes: "Clear code structure with functions. Excellent commenting and documentation. Consistent naming conventions. Cross-references well integrated."
+
+# Risk assessment
+risk_summary:
+  totals: { critical: 0, high: 0, medium: 0, low: 0 }
+  highest_score: 0
+  recommendations:
+    must_fix: []
+    monitor: []
+
+# Requirements traceability (Given-When-Then patterns documented)
+requirements_coverage:
+  - ac: 1
+    description: "Individual component update process documented"
+    coverage: "Section 2.3, 2.9, scripts/update-service.sh (503 lines)"
+    test_pattern: "Given service needs update, When admin runs update-service.sh, Then system backs up/updates/monitors/offers rollback"
+
+  - ac: 2
+    description: "Version pinning strategy documented in docker-compose.yml"
+    coverage: "coding-standards.md lines 7-17, section 2.6"
+    test_pattern: "Given developer wants version pinning info, When they read docs, Then they understand never use 'latest'"
+
+  - ac: 3
+    description: "Rollback procedure for failed updates"
+    coverage: "Section 2.2 step 8, section 2.9, update-service.sh lines 284-323"
+    test_pattern: "Given update fails, When admin runs rollback, Then system restored to previous working state"
+
+  - ac: 4
+    description: "Pre-update backup verification checklist"
+    coverage: "Section 2.7 comprehensive checklist template"
+    test_pattern: "Given admin wants safe update, When they follow checklist, Then all backups verified before proceeding"
+
+  - ac: 5
+    description: "Common update issues and solutions documented"
+    coverage: "Section 2.4 with 6 detailed issues + reference table"
+    test_pattern: "Given admin encounters update failure, When they consult troubleshooting, Then they find issue pattern and solution"
+
+  - ac: 6
+    description: "Update notification strategy defined"
+    coverage: "Section 2.5, scripts/check-updates.sh (262 lines)"
+    test_pattern: "Given admin wants update info, When they run check-updates.sh, Then they get report with update types"
+
+# Code quality findings
+code_quality:
+  bash_scripts:
+    - file: "scripts/update-service.sh"
+      lines: 503
+      quality: "Excellent"
+      highlights:
+        - "Proper error handling (set -euo pipefail)"
+        - "Comprehensive logging to /var/log/borgstack-updates.log"
+        - "Color-coded output for UX"
+        - "Multi-container service handling (Lowcoder)"
+        - "Automatic rollback on failure"
+      shellcheck: "Warnings only (SC2155) - common pattern, non-critical"
+
+    - file: "scripts/check-updates.sh"
+      lines: 262
+      quality: "Excellent"
+      highlights:
+        - "Docker Hub API integration with rate limiting"
+        - "Exponential backoff strategy"
+        - "Semantic version comparison (major/minor/patch)"
+        - "Filters unstable versions (alpha, beta, rc)"
+        - "Email notification support"
+      shellcheck: "Warnings only (SC2034, SC2089/SC2090) - style issues, non-critical"
+
+  documentation:
+    - file: "docs/06-manutencao.md"
+      sections_added: 6
+      lines_added: "~1400"
+      quality: "Excellent"
+      highlights:
+        - "Brazilian Portuguese maintained consistently"
+        - "Diátaxis framework compliance (How-to Guide structure)"
+        - "Comprehensive troubleshooting (6 issues documented)"
+        - "Practical bash command examples"
+        - "Cross-references properly integrated"
+
+# Standards compliance verification
+standards_compliance:
+  coding_standards: "PASS - Fully compliant with docs/architecture/coding-standards.md"
+  project_structure: "PASS - Scripts in scripts/, docs in docs/, proper naming"
+  testing_strategy: "PASS - Manual validation completed per DoD checklist (27/27 items)"
+  documentation_quality: "PASS - Brazilian Portuguese, Diátaxis framework, cross-referenced"
+
+# Recommendations for future enhancements (non-blocking)
+recommendations:
+  future:
+    - action: "Consider adding integration tests for update-service.sh script"
+      refs: ["scripts/update-service.sh"]
+      priority: "low"
+      note: "Script is well-tested manually, but automated tests would increase confidence"
+
+    - action: "Consider adding GitHub Actions workflow to check for updates weekly"
+      refs: [".github/workflows/check-updates.yml"]
+      priority: "low"
+      note: "Automate check-updates.sh execution in CI/CD pipeline"
+
+    - action: "Address shellcheck style warnings if time permits"
+      refs: ["scripts/update-service.sh:51,153,206,214,235,239", "scripts/check-updates.sh:27,85,96,106,128"]
+      priority: "low"
+      note: "SC2155, SC2034, SC2089/SC2090 are style issues, not functional problems"
+
+# Files created/modified during story
+files_delivered:
+  created:
+    - "scripts/update-service.sh (503 lines)"
+    - "scripts/check-updates.sh (262 lines)"
+
+  modified:
+    - "docs/06-manutencao.md (~1400 lines added in sections 2.4-2.9)"
+    - "docs/README.md (added 6 items to section 06 content list)"
+    - "docs/architecture/coding-standards.md (added cross-reference at line 17)"
+    - "README.md (added 'Updating Components' section with 47 lines)"
+
+# Review summary
+review_summary: |
+  Story 6.4 represents a comprehensive and production-ready implementation of component update procedures.
+
+  **Strengths:**
+  - All 6 acceptance criteria fully covered with excellent documentation
+  - Scripts demonstrate professional-level bash coding with proper error handling
+  - Multi-container service handling (Lowcoder) shows attention to edge cases
+  - Docker Hub API integration with rate limiting shows production awareness
+  - Comprehensive troubleshooting section (6 issues) shows operational maturity
+  - Cross-references properly integrated across 4 documentation files
+  - Brazilian Portuguese quality maintained consistently
+
+  **Testing & Validation:**
+  - Manual validation completed (27/27 DoD items passed)
+  - Shellcheck validation passed (warnings only, no errors)
+  - All bash commands verified for correctness
+  - Scripts are executable with proper permissions
+
+  **No blocking issues identified.**
+
+  This story is ready for production deployment.