ComplianceAsCode/content
Oct 2024 – Jan 2026
16 Months active
Languages Used
BashJinjaJinja2PythonSCEXMLShellYAML
Technical Skills
Build ScriptingCode RefactoringContainerizationData StructuresMacro DefinitionScripting
Jan Černý
PROFILE
Jan Černý
Over a 16-month period, Jan Cerny engineered and maintained security automation and compliance tooling in the ComplianceAsCode/content repository. He delivered robust features and fixes that improved policy enforcement, auditability, and deployment reliability across RHEL and Fedora platforms. Using Python, Ansible, and Bash, Jan refactored core modules for idempotence, modernized build systems with CMake, and expanded automated test coverage. His work included templating audit rules, integrating CIS and HIPAA controls, and aligning remediation logic with evolving standards. By focusing on maintainable code, cross-platform compatibility, and reproducible builds, Jan ensured the repository’s security baselines remained reliable and production-ready.
Overall Statistics
Feature vs Bugs
61%Features
Repository Contributions
430Total
Bugs
100
Commits
430
Features
157
Lines of code
55,739
Activity Months16
Your Network
2624 people
Work History
January 2026
27 Commits • 8 Features
Jan 1, 2026January 2026 monthly summary for ComplianceAsCode/content: Delivered core CIS hardening enhancements and reliability improvements across PAM/authselect, SSHD/RHEL8 CIS, audit rules, and test/automation. The work reduced security risk, expanded multi-platform coverage, and improved development velocity through better testing and Ansible task quality.
27 Commits • 8 Features
Jan 1, 2026January 2026 monthly summary for ComplianceAsCode/content: Delivered core CIS hardening enhancements and reliability improvements across PAM/authselect, SSHD/RHEL8 CIS, audit rules, and test/automation. The work reduced security risk, expanded multi-platform coverage, and improved development velocity through better testing and Ansible task quality.
January 2026
December 2025
29 Commits • 7 Features
Dec 1, 2025December 2025 monthly summary for ComplianceAsCode/content focused on reinforcing CIS alignment, security guidance, and maintainability. Major deliverables included RHEL 10 CIS PAM hardening, CCE integration with automated table generation, and extensive cleanup of deprecated SSH policies, XSLT tooling, and test scaffolding. Also updated Fedora/RHEL 8 CIS profiles and improved test scenarios and code quality.
December 2025
29 Commits • 7 Features
Dec 1, 2025December 2025 monthly summary for ComplianceAsCode/content focused on reinforcing CIS alignment, security guidance, and maintainability. Major deliverables included RHEL 10 CIS PAM hardening, CCE integration with automated table generation, and extensive cleanup of deprecated SSH policies, XSLT tooling, and test scaffolding. Also updated Fedora/RHEL 8 CIS profiles and improved test scenarios and code quality.
November 2025
49 Commits • 17 Features
Nov 1, 2025November 2025 - ComplianceAsCode/content: - Expanded and hardened RHEL CIS coverage with a focus on automation reliability and maintainability. Delivered significant CIS-aligned rule sets and continuous improvements across auditing, remediation, and governance. - Key feature deliveries include RHEL 10 CIS audit rule enhancements (aligning 2.1.20, network configuration audit, and continue-loading rule), separate domainname/hostname rules, and the addition of targeted audit watches for critical files. - Major quality and reliability improvements: OVAL ID conflict resolution to prevent build issues, sorting of CIS control files, fixed XCCDF value types, and numerous Ansible remediation enhancements with improved idempotency. - Security hardening across PAM, password policies, and SSH: pwquality in PAM, maxsequence for accounts_password_pam, pwhistory enforcement for root, authtok configuration, and sshd_forwarding hardening. - Operational stability and maintainability: remediation metadata, test scenarios corrections, newline EOF housekeeping, ownership rules for files/directories, and fixes for broken URLs and script templates. - Business value: improved CIS compliance posture for RHEL 10 (and related profiles), reduced build and runtime risk, and clearer, auditable changes across security policy as code.
49 Commits • 17 Features
Nov 1, 2025November 2025 - ComplianceAsCode/content: - Expanded and hardened RHEL CIS coverage with a focus on automation reliability and maintainability. Delivered significant CIS-aligned rule sets and continuous improvements across auditing, remediation, and governance. - Key feature deliveries include RHEL 10 CIS audit rule enhancements (aligning 2.1.20, network configuration audit, and continue-loading rule), separate domainname/hostname rules, and the addition of targeted audit watches for critical files. - Major quality and reliability improvements: OVAL ID conflict resolution to prevent build issues, sorting of CIS control files, fixed XCCDF value types, and numerous Ansible remediation enhancements with improved idempotency. - Security hardening across PAM, password policies, and SSH: pwquality in PAM, maxsequence for accounts_password_pam, pwhistory enforcement for root, authtok configuration, and sshd_forwarding hardening. - Operational stability and maintainability: remediation metadata, test scenarios corrections, newline EOF housekeeping, ownership rules for files/directories, and fixes for broken URLs and script templates. - Business value: improved CIS compliance posture for RHEL 10 (and related profiles), reduced build and runtime risk, and clearer, auditable changes across security policy as code.
November 2025
October 2025
27 Commits • 7 Features
Oct 1, 20252025-10 monthly summary for ComplianceAsCode/content. Delivered broad automation improvements that harden and stabilize security controls while improving maintainability and audit readiness. Key features shipped include widespread Ansible idempotence hardening across multiple modules, template-driven auditing rules, container-scans optimization, and enhanced reporting. Critical bug fixes were completed to improve CI reliability and CIS compliance checks. Overall impact is a more reliable, scalable baseline for security configurations with clearer business value and faster iteration cycles.
October 2025
27 Commits • 7 Features
Oct 1, 20252025-10 monthly summary for ComplianceAsCode/content. Delivered broad automation improvements that harden and stabilize security controls while improving maintainability and audit readiness. Key features shipped include widespread Ansible idempotence hardening across multiple modules, template-driven auditing rules, container-scans optimization, and enhanced reporting. Critical bug fixes were completed to improve CI reliability and CIS compliance checks. Overall impact is a more reliable, scalable baseline for security configurations with clearer business value and faster iteration cycles.
September 2025
22 Commits • 16 Features
Sep 1, 2025Monthly summary for ComplianceAsCode/content (September 2025). Focused on delivering safe, scalable automation improvements across containerized and image-based environments, with concrete features, bug fixes, and measurable business impact.
22 Commits • 16 Features
Sep 1, 2025Monthly summary for ComplianceAsCode/content (September 2025). Focused on delivering safe, scalable automation improvements across containerized and image-based environments, with concrete features, bug fixes, and measurable business impact.
September 2025
August 2025
8 Commits • 2 Features
Aug 1, 2025Concise monthly summary for 2025-08 focused on ComplianceAsCode/content. Delivered core enhancements, critical fixes, and improvements in test coverage, with clear business value across compliance, reliability, and maintainability.
August 2025
8 Commits • 2 Features
Aug 1, 2025Concise monthly summary for 2025-08 focused on ComplianceAsCode/content. Delivered core enhancements, critical fixes, and improvements in test coverage, with clear business value across compliance, reliability, and maintainability.
July 2025
41 Commits • 10 Features
Jul 1, 2025Month: 2025-07 Concise monthly summary for ComplianceAsCode/content focused on delivering features with business value, fixing critical issues, and strengthening overall reliability. Key features delivered: - API Renaming Refactor: Rename deprecated API functions for consistency across the codebase (commits: 2a596a11a5e14637ccee297686330bb365ba9390; a6638719440522ada7a60e563c945a09b3c1ebac). Improves maintainability and future-proofing. - Coredump rules: support drop-in files: Added support for drop-in files in coredump rules (commit: 8716a8b58650932f85bdb5cab7a0c9f3b863ee34). - Run some shell commands in check mode: Enables execution of shell commands during check mode, improving testability and validation (commit: 404def069b71440d46ae8513ce94e519d060845c). - Configure AIDE and fapolicyd conditionally: Configure AIDE only if installed (commit: 1c4509d5202c39f460fc290663eb06b9ae2ea827) and Configure fapolicyd only if installed (commit: a389c90beb8b16c984f87f0b8690af23a90890f2). - Add a build/process tag: Introduced a tag in the build/process (commit: 15f6dbf451c03e288620697211befaaf6bc35fad). Major bugs fixed: - Prevent fail because of nonexistent file (commit: 700acae5db9e0d16b6da1c4da5ff0ee3e1028f65). - Ensure the SSHD config file exists (commit: acf87b6ccac3dc0282dbaab16bcb1e5c5325b257). - Do not fail the assert in check mode (commit: b680c3b078173167b2874188779592af73a23a70). - Check that the file exists to avoid downstream errors (commit: 56ff87e492bccc0f733ff946889d046d713b0b4d). - Prevent fail in check mode if the file doesn't exist (commit: 0a251048977be39d90a2d050d42bf9202f0b325c). - Avoid errors in check mode in authselect tasks (commit: 1fc6a0a6c6c008fdbfe09305b8690f5125d8c591). - Ensure AIDE configuration file exists (commit: 68210507a699ee9a922d027c32e575c10629b7d0). - Package management and fixes: Install polkit-pkla-compat and fix package name in service_cron_enabled (commits: 9895b430b13d6beca4d8c6aa7018f461311d5a09; 30f83358a804f6fbfd74ee0f398138711c7cf40e). - Ansible/check mode resilience and test alignment: Prevent fail in check mode; disable asserts; align test expectations; fix tests for sshd_rekey_limit and grub2_pti_argument; (commits: 1112fff1fc932cb3a0756efc05ac274690d45d03; 1f9312aea0d13a73c76b6759f2384d12f95f74ad; 34b02910e808d395ae5aaa1e55ef4b6d7565d269; 071768fa731e21be408b0d08c6b4200b5b7772e5; f8ab85f9fe94a7b255abceb08320bd5365bea4d2). Overall impact and accomplishments: - Significantly increased reliability of deployment checks and runtime configurations by hardening check-mode behavior, validating file existence, and guarding against missing dependencies. This reduces risk of automated failures during CI/CD and in production-like environments. - Reduced configuration noise and risk by applying features only when prerequisites are present (AIDE, fapolicyd), leading to safer, more portable playbooks across diverse hosts. - Expanded test coverage and stability (unit tests, RHEL 10 scenarios), enabling faster iteration and higher confidence in changes. Technologies and skills demonstrated: - Refactoring for API consistency and deprecation handling (Python/Bash interplay), - Conditional configuration logic and environment-aware automation, - Robust check-mode design and test alignment in Ansible tasks, - YAML handling stability, deep copying and edge-case handling, and - Expanded testing framework coverage (unit tests, extended OS scenarios). Business value: - Faster, safer releases with fewer check-mode and deployment failures, improved maintainability, and clearer API boundaries for downstream integrations.
41 Commits • 10 Features
Jul 1, 2025Month: 2025-07 Concise monthly summary for ComplianceAsCode/content focused on delivering features with business value, fixing critical issues, and strengthening overall reliability. Key features delivered: - API Renaming Refactor: Rename deprecated API functions for consistency across the codebase (commits: 2a596a11a5e14637ccee297686330bb365ba9390; a6638719440522ada7a60e563c945a09b3c1ebac). Improves maintainability and future-proofing. - Coredump rules: support drop-in files: Added support for drop-in files in coredump rules (commit: 8716a8b58650932f85bdb5cab7a0c9f3b863ee34). - Run some shell commands in check mode: Enables execution of shell commands during check mode, improving testability and validation (commit: 404def069b71440d46ae8513ce94e519d060845c). - Configure AIDE and fapolicyd conditionally: Configure AIDE only if installed (commit: 1c4509d5202c39f460fc290663eb06b9ae2ea827) and Configure fapolicyd only if installed (commit: a389c90beb8b16c984f87f0b8690af23a90890f2). - Add a build/process tag: Introduced a tag in the build/process (commit: 15f6dbf451c03e288620697211befaaf6bc35fad). Major bugs fixed: - Prevent fail because of nonexistent file (commit: 700acae5db9e0d16b6da1c4da5ff0ee3e1028f65). - Ensure the SSHD config file exists (commit: acf87b6ccac3dc0282dbaab16bcb1e5c5325b257). - Do not fail the assert in check mode (commit: b680c3b078173167b2874188779592af73a23a70). - Check that the file exists to avoid downstream errors (commit: 56ff87e492bccc0f733ff946889d046d713b0b4d). - Prevent fail in check mode if the file doesn't exist (commit: 0a251048977be39d90a2d050d42bf9202f0b325c). - Avoid errors in check mode in authselect tasks (commit: 1fc6a0a6c6c008fdbfe09305b8690f5125d8c591). - Ensure AIDE configuration file exists (commit: 68210507a699ee9a922d027c32e575c10629b7d0). - Package management and fixes: Install polkit-pkla-compat and fix package name in service_cron_enabled (commits: 9895b430b13d6beca4d8c6aa7018f461311d5a09; 30f83358a804f6fbfd74ee0f398138711c7cf40e). - Ansible/check mode resilience and test alignment: Prevent fail in check mode; disable asserts; align test expectations; fix tests for sshd_rekey_limit and grub2_pti_argument; (commits: 1112fff1fc932cb3a0756efc05ac274690d45d03; 1f9312aea0d13a73c76b6759f2384d12f95f74ad; 34b02910e808d395ae5aaa1e55ef4b6d7565d269; 071768fa731e21be408b0d08c6b4200b5b7772e5; f8ab85f9fe94a7b255abceb08320bd5365bea4d2). Overall impact and accomplishments: - Significantly increased reliability of deployment checks and runtime configurations by hardening check-mode behavior, validating file existence, and guarding against missing dependencies. This reduces risk of automated failures during CI/CD and in production-like environments. - Reduced configuration noise and risk by applying features only when prerequisites are present (AIDE, fapolicyd), leading to safer, more portable playbooks across diverse hosts. - Expanded test coverage and stability (unit tests, RHEL 10 scenarios), enabling faster iteration and higher confidence in changes. Technologies and skills demonstrated: - Refactoring for API consistency and deprecation handling (Python/Bash interplay), - Conditional configuration logic and environment-aware automation, - Robust check-mode design and test alignment in Ansible tasks, - YAML handling stability, deep copying and edge-case handling, and - Expanded testing framework coverage (unit tests, extended OS scenarios). Business value: - Faster, safer releases with fewer check-mode and deployment failures, improved maintainability, and clearer API boundaries for downstream integrations.
July 2025
June 2025
17 Commits • 3 Features
Jun 1, 2025June 2025 monthly summary for ComplianceAsCode/content. Focused on delivering automated compliance baselines and improving test reliability, translating security requirements into robust, production-ready profiles with reproducible builds.
June 2025
17 Commits • 3 Features
Jun 1, 2025June 2025 monthly summary for ComplianceAsCode/content. Focused on delivering automated compliance baselines and improving test reliability, translating security requirements into robust, production-ready profiles with reproducible builds.
May 2025
48 Commits • 15 Features
May 1, 2025May 2025 highlights for ComplianceAsCode/content include platform compatibility updates for the RHEL family (migrating to multi_platform_rhel and correcting grub2_password test usage) and RHEL 10 HIPAA configuration cleanup (removing service_rexec_disabled). Additionally, no remediation tag support was introduced across tests and configurations (notably in openssl_tls_crypto_policy and sshd_use_approved_kex_ordered_stig), while test stability and data handling were improved through expanded test code stabilization, updated TS coverage for no_nis_in_nsswitch, and enhanced profile stability data tooling. Other progress includes JSON/templating enhancements (JSON methods on XCCDFEntity; JSON storage for resolved items), Jinja macro improvements, and refactoring of OVAL macros; and ongoing code quality and maintenance improvements (Code Climate cleanups, removal of obsolete RHEL 8/9 rules).
48 Commits • 15 Features
May 1, 2025May 2025 highlights for ComplianceAsCode/content include platform compatibility updates for the RHEL family (migrating to multi_platform_rhel and correcting grub2_password test usage) and RHEL 10 HIPAA configuration cleanup (removing service_rexec_disabled). Additionally, no remediation tag support was introduced across tests and configurations (notably in openssl_tls_crypto_policy and sshd_use_approved_kex_ordered_stig), while test stability and data handling were improved through expanded test code stabilization, updated TS coverage for no_nis_in_nsswitch, and enhanced profile stability data tooling. Other progress includes JSON/templating enhancements (JSON methods on XCCDFEntity; JSON storage for resolved items), Jinja macro improvements, and refactoring of OVAL macros; and ongoing code quality and maintenance improvements (Code Climate cleanups, removal of obsolete RHEL 8/9 rules).
May 2025
April 2025
32 Commits • 16 Features
Apr 1, 2025During April 2025, ComplianceAsCode/content delivered substantial security policy updates, platform coverage enhancements, and governance improvements that reduce risk and accelerate secure deployment cycles. The work emphasized business value through regulatory alignment, maintainability, and reflection of current platform baselines.
April 2025
32 Commits • 16 Features
Apr 1, 2025During April 2025, ComplianceAsCode/content delivered substantial security policy updates, platform coverage enhancements, and governance improvements that reduce risk and accelerate secure deployment cycles. The work emphasized business value through regulatory alignment, maintainability, and reflection of current platform baselines.
March 2025
47 Commits • 26 Features
Mar 1, 2025March 2025: Implemented security and reliability enhancements across ComplianceAsCode/content, including GPG enforcement, robust authentication handling, and build integrity checks; expanded templating and package handling capabilities; added CCI support; improved platform processing and data streaming. Also fixed key bugs and refined audits for safer, faster deployments.
47 Commits • 26 Features
Mar 1, 2025March 2025: Implemented security and reliability enhancements across ComplianceAsCode/content, including GPG enforcement, robust authentication handling, and build integrity checks; expanded templating and package handling capabilities; added CCI support; improved platform processing and data streaming. Also fixed key bugs and refined audits for safer, faster deployments.
March 2025
February 2025
13 Commits • 4 Features
Feb 1, 2025February 2025 — ComplianceAsCode/content delivered tangible security enhancements, build system modernization, and CI/CD improvements that directly impact security posture, release reliability, and developer productivity. The month focused on tightening security, strengthening container/build workflows, and aligning tooling with modern Python/CMake practices to accelerate safe deployments and minimize operational risk.
February 2025
13 Commits • 4 Features
Feb 1, 2025February 2025 — ComplianceAsCode/content delivered tangible security enhancements, build system modernization, and CI/CD improvements that directly impact security posture, release reliability, and developer productivity. The month focused on tightening security, strengthening container/build workflows, and aligning tooling with modern Python/CMake practices to accelerate safe deployments and minimize operational risk.
January 2025
25 Commits • 8 Features
Jan 1, 2025January 2025: Delivered feature-rich updates to ComplianceAsCode/content with a focus on extending the OSPP baseline for RHEL 10, stabilizing container/image mode, and improving packaging, testing, and maintainability. Business value delivered includes a stronger security posture on RHEL 10, more reliable remediations, and more predictable builds across CI and deployments.
25 Commits • 8 Features
Jan 1, 2025January 2025: Delivered feature-rich updates to ComplianceAsCode/content with a focus on extending the OSPP baseline for RHEL 10, stabilizing container/image mode, and improving packaging, testing, and maintainability. Business value delivered includes a stronger security posture on RHEL 10, more reliable remediations, and more predictable builds across CI and deployments.
January 2025
December 2024
15 Commits • 4 Features
Dec 1, 2024December 2024 monthly summary for ComplianceAsCode/content. Focused on delivering features that strengthen security governance and reliability across RHEL 9/10 environments, expanding test coverage, and improving maintainability. Key outcomes include: introduced bootable_containers_supported to centrally govern bootable-container features per product (enabled for RHEL 9/10); fixes to bootable container policy and audit rules to reduce false positives/negatives and ensure correct behavior within bootable container images; GRUB2 bootloader argument handling enhancements for robust parsing and reduced false negatives; RHEL 9 GUI profile stability tests updated to cover the cron package, increasing test coverage; SCE checks environment support and modular refactor of ssg/build_sce.py for readability and maintainability; and metadata governance improvements with SRG/CCI mappings.
December 2024
15 Commits • 4 Features
Dec 1, 2024December 2024 monthly summary for ComplianceAsCode/content. Focused on delivering features that strengthen security governance and reliability across RHEL 9/10 environments, expanding test coverage, and improving maintainability. Key outcomes include: introduced bootable_containers_supported to centrally govern bootable-container features per product (enabled for RHEL 9/10); fixes to bootable container policy and audit rules to reduce false positives/negatives and ensure correct behavior within bootable container images; GRUB2 bootloader argument handling enhancements for robust parsing and reduced false negatives; RHEL 9 GUI profile stability tests updated to cover the cron package, increasing test coverage; SCE checks environment support and modular refactor of ssg/build_sce.py for readability and maintainability; and metadata governance improvements with SRG/CCI mappings.
November 2024
23 Commits • 11 Features
Nov 1, 2024November 2024: Delivered platform normalization and centralized configuration for ComplianceAsCode/content, strengthening policy consistency, security, and maintainability. Highlights include platform rule normalization, centralized platform config, sysctl enhancements, conditional handling for /etc/nsswitch.conf, UX improvements, and expanded test coverage with code-quality fixes.
23 Commits • 11 Features
Nov 1, 2024November 2024: Delivered platform normalization and centralized configuration for ComplianceAsCode/content, strengthening policy consistency, security, and maintainability. Highlights include platform rule normalization, centralized platform config, sysctl enhancements, conditional handling for /etc/nsswitch.conf, UX improvements, and expanded test coverage with code-quality fixes.
November 2024
October 2024
7 Commits • 3 Features
Oct 1, 2024Summary for 2024-10: Delivered boot process safety enhancements, SCE integration, and template hardening in ComplianceAsCode/content. Focused on aligning with security/compliance checks, improving data stream structure, and clarifying IPv6 handling. Resulted in reduced boot-time risk, more reliable templates, and higher maintainability with improved test coverage and code quality.
October 2024
7 Commits • 3 Features
Oct 1, 2024Summary for 2024-10: Delivered boot process safety enhancements, SCE integration, and template hardening in ComplianceAsCode/content. Focused on aligning with security/compliance checks, improving data stream structure, and clarifying IPv6 handling. Resulted in reduced boot-time risk, more reliable templates, and higher maintainability with improved test coverage and code quality.
Activity
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Quality Metrics
Correctness94.8%
Maintainability93.6%
Architecture92.4%
Performance90.4%
AI Usage20.0%
Skills & Technologies
Programming Languages
AnsibleBashCMakeHTMLJSONJinjaJinja2KubernetesMarkdownOVAL
Technical Skills
AST parsingAnsibleAnsible scriptingAudit Rule ConfigurationAudit Rule ManagementAudit RulesAuditd ConfigurationAuditingAutomationBackend DevelopmentBashBash ScriptingBash scriptingBootloader ConfigurationBootloader Management
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