football/JOURNAL.md

KNEL-Football Development Journal

Important

: This file is APPEND-ONLY. Never delete or modify existing entries. Add new entries at the TOP (after this header) with date and context. This serves as long-term memory for AI agents and human developers.

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Entry 2026-02-19 (Session 5): Critical Bug Fixes

Context

Resumed session after context overflow. Deep orientation revealed critical bugs in security-hardening.sh hook that were blocking FIM and SSH client configuration.

Changes Implemented

1. Bug Fix: Function Name Mismatch

   • config/hooks/live/security-hardening.sh:19 called configure_ssh
   • But src/security-hardening.sh defines configure_ssh_client
   • Fixed: Changed hook to call configure_ssh_client

2. Bug Fix: Missing FIM Call

   • configure_fim function existed in src/security-hardening.sh
   • But hook was never calling it
   • Fixed: Added configure_fim call to hook

Root Cause Analysis

Commit 0807611 "feat: add FIM, comprehensive audit logging, SSH client-only" added functions to src/security-hardening.sh but the corresponding hook was either:

• Not updated to call new functions (configure_fim)
• Calling wrong function name (configure_ssh vs configure_ssh_client)

This is a common pattern in codebase consolidation: when adding features to source files, remember to update ALL callers (hooks, scripts, tests).

Lessons Learned

1. Cross-Reference Source and Callers

   • When adding functions, search for ALL callers
   • grep -r function_name config/ to find hooks
   • Test execution paths, not just function existence

2. Documentation vs Reality Gap

   • JOURNAL.md said "FIM ADDED" but hook never called it
   • STATUS.md said "SSH client-only CONFIGURED" but wrong function name
   • Lesson: Verify code execution, not just code presence

Verification

./run.sh lint    # ✅ Zero warnings
./run.sh test    # ✅ 92 pass, 19 skip (VM tests)

Action Items

1. Rebuild ISO with bug fixes (in progress)
2. Update STATUS.md with accurate state
3. Consider adding hook validation tests

⚠️ PERMANENT LESSONS FOR FUTURE SESSIONS

These mistakes have happened multiple times. DO NOT repeat them.

1. When Adding/Modifying Functions: ALWAYS Update All Callers

   • Pattern: Function added to src/*.sh but hook in config/hooks/ not updated
   • Prevention: After editing src/security-hardening.sh, immediately run:

     grep -r "configure_ssh\|configure_fim\|configure_audit" config/hooks/
     

   • Test: Run ./run.sh test before committing - don't just assume it works

2. Documentation Claims Must Match Code Reality

   • Pattern: JOURNAL says "ADDED" but hook never calls the function
   • Prevention: After implementing a feature, verify execution path:

     # For each new function in src/:
     # 1. Find where it should be called
     # 2. Add the call
     # 3. Test that it runs
     

   • Never trust docs without code verification

3. Cross-Reference Before Committing

   • This project has: src/*.sh → config/hooks/**/*.sh → executed during build
   • Any change to source files requires checking ALL downstream callers
   • Use grep -r "function_name" . liberally

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Entry 2026-02-17 (Session 4): Script Consolidation

Context

Continued session focused on consolidating all top-level scripts into run.sh as the single entry point. Merged test-iso.sh (344 lines) and monitor-build.sh (43 lines) into run.sh.

Changes Implemented

1. Script Consolidation

   • Merged test-iso.sh VM testing framework into run.sh
   • Merged monitor-build.sh build monitoring into run.sh
   • Deleted test-iso.sh and monitor-build.sh
   • run.sh now ~500+ lines, single entry point for all operations

2. New run.sh Commands

   ./run.sh monitor [secs]          # Monitor build progress
   ./run.sh test:iso check          # Check VM testing prerequisites
   ./run.sh test:iso create         # Create and start test VM
   ./run.sh test:iso console        # Connect to VM console
   ./run.sh test:iso status         # Show VM status
   ./run.sh test:iso destroy        # Destroy VM and cleanup
   ./run.sh test:iso boot-test      # Run automated boot test
   ./run.sh test:iso secure-boot    # Test Secure Boot
   ./run.sh test:iso fde-test       # Test FDE passphrase prompt
   

3. Test Updates

   • Updated tests/system/boot_test.bats to test run.sh instead of test-iso.sh
   • Updated skip messages in fde_test.bats and secureboot_test.bats

4. ISO Rebuild

   • Built successfully at 15:19 CST (449 MB)
   • Checksums verified (SHA256, MD5)

Architectural Decision Records

ADR-009: Single Entry Point (run.sh)

Date: 2026-02-17 Status: Accepted

Context: Multiple top-level scripts (run.sh, test-iso.sh, monitor-build.sh) caused fragmentation and made the project harder to navigate.

Decision: Consolidate all scripts into run.sh as the single entry point.

Rationale:

• Simpler user experience - one command to remember
• Consistent interface for all operations
• Easier to maintain and test
• Follows Unix philosophy of doing one thing well

Consequences:

• run.sh is larger (~500 lines) but well-organized
• All functionality accessible via subcommands
• Deleted scripts: test-iso.sh, monitor-build.sh

Lessons Learned

1. VM Testing Requires libvirt Group

   • virt-install fails if user not in libvirt group
   • QEMU fallback works but virt-install preferred for libvirt integration
   • Fix: sudo usermod -aG libvirt $USER then logout/login

2. Test Updates Required After Script Moves

   • When moving/deleting scripts, grep for all references
   • Tests in tests/system/ referenced test-iso.sh directly
   • Updated to use run.sh test:iso commands

Files Changed

File	Action
run.sh	Merged test-iso.sh and monitor-build.sh
test-iso.sh	DELETED
monitor-build.sh	DELETED
tests/system/boot_test.bats	Updated to test run.sh
tests/system/fde_test.bats	Updated skip message
tests/system/secureboot_test.bats	Updated skip message
STATUS.md	Updated status to COMPLETE
JOURNAL.md	This entry

Commit

d9f2f02 refactor: consolidate test-iso.sh and monitor-build.sh into run.sh

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Entry 2026-02-17 (Session 3): Project Re-Orientation

Context

New session start. User requested deep project review and orientation. Reviewed git logs, STATUS.md, JOURNAL.md, and current system state.

Current State Assessment

1. ISO Status: STALE

   • Built: 2026-02-17 10:50
   • 6 commits since build (FIM, audit, SSH client-only, shellcheck fixes)
   • Missing features: AIDE FIM, comprehensive auditd, SSH client-only
   • Rebuild required to include recent security features

2. Test Suite: HEALTHY

   • 111 tests total, 92 pass, 19 skip (VM-required)
   • Skip reasons: VM not running, requires manual verification
   • Categories: unit (12), integration (6), security (44), system (47)
   • Zero failures, zero shellcheck warnings

3. Compliance: IN PROGRESS

   • CIS 1.4 (FIM): Code ready, not in ISO
   • CIS 5.2 (SSH): Code ready, not in ISO
   • CIS 6.2 (Audit): Code ready, not in ISO
   • NIST/FedRAMP/CMMC: Same status - config ready, needs rebuild

4. Blockers:

   • User NOT in libvirt group (blocks VM testing)
   • ISO outdated (blocks runtime verification)

Architecture Review

KNEL-Football OS (this project)
    │ WireGuard (outbound only)
    ▼
Privileged Access Workstation
    │ Direct access
    ▼
Tier0 Infrastructure

Key design principle: No inbound services. SSH client, RDP client, WireGuard client only.

Security Features Implemented (Code)

Feature	File	Status
Full Disk Encryption	config/hooks/installed/encryption-*.sh	✅ Code ready
Password Policy	src/security-hardening.sh	✅ Code ready
Firewall (nftables)	config/hooks/live/firewall-setup.sh	✅ Code ready
FIM (AIDE)	config/hooks/live/aide-setup.sh	✅ Code ready
Audit Logging	config/hooks/live/audit-logging.sh	✅ Code ready
SSH Client-Only	config/hooks/live/ssh-client-only.sh	✅ Code ready
WiFi/Bluetooth Block	config/hooks/live/security-hardening.sh	✅ Code ready

Key Files to Understand

• run.sh - Main entry point for all operations
• AGENTS.md - Agent behavior guidelines (READ FIRST)
• STATUS.md - Manager status report
• JOURNAL.md - This file - AI memory
• PRD.md - Product requirements
• config/preseed.cfg - Debian installer configuration
• config/hooks/live/ - Runtime configuration hooks
• tests/ - BATS test suite

Open Action Items (from STATUS.md)

1. Rebuild ISO with new security features
2. Logout/login for libvirt access (user action)
3. Run VM boot tests after ISO rebuild
4. Remove hardcoded passwords from preseed.cfg
5. Consider Secure Boot implementation

Session Decision

Next step: Rebuild ISO to include FIM, audit logging, SSH client-only changes. This is a 60-90 minute build. User should decide if they want to start it now.

ADR-008: ISO Rebuild Priority

Date: 2026-02-17 Status: Proposed

Context: 6 commits with security features made since last ISO build. Need to decide whether to rebuild now or continue development.

Options:

1. Rebuild now - validates features, enables runtime testing
2. Continue development - batch more changes, rebuild later

Recommendation: Rebuild now. Features are ready, compliance requires verification.

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Entry 2026-02-17 (Session 2): FIM, Audit, SSH Security Enhancements

Context

Continued session focused on closing compliance gaps for CIS, FedRAMP, and CMMC. Added File Integrity Monitoring (FIM), comprehensive audit logging, and SSH client-only configuration. Resolved all shellcheck warnings and added git safety documentation.

Changes Implemented

1. File Integrity Monitoring (AIDE)

   • Added config/hooks/live/aide-setup.sh
   • Configured to monitor /etc, /bin, /sbin, /usr/bin, /usr/sbin, /lib
   • Initializes database on first boot
   • Compliance: CIS 1.4, FedRAMP AU-7, CMMC AU.3.059

2. Comprehensive Audit Logging

   • Added config/hooks/live/audit-logging.sh
   • Monitors: auth, access, modification, privilege, session events
   • Log retention: 90 days
   • Compliance: CIS 6.2, FedRAMP AU-2, CMMC AU.2.042

3. SSH Client-Only Configuration

   • Modified config/hooks/live/ssh-client-only.sh
   • Disabled sshd service, removed server package
   • SSH client tools remain for outbound connections
   • Compliance: CIS 5.2, NIST 800-53 IA-5, CMMC IA.2.078

4. Shellcheck Fixes

   • Resolved all warnings in shell scripts
   • SC2120/SC2119: Functions called without arguments (correct behavior)
   • SC1091: Source files exist at runtime
   • SC2034: Variables used in templates
   • Result: ZERO shellcheck warnings

5. Git Safety Rules

   • Added to AGENTS.md:
     • Quote all path arguments (handles spaces)
     • Use non-interactive rebase (git rebase --no-interactive not available, use -i with care)
     • Destructive operations require user confirmation

Test Coverage Update

Before Session: 31 tests
After Session:  111 tests (+80)

Unit Tests:        12 → 12 (unchanged)
Integration Tests:  6 →  6 (unchanged)
Security Tests:    13 → 44 (+31)
System Tests:       0 → 47 (+47, new category)

Architectural Decision Records

ADR-005: File Integrity Monitoring via AIDE

Date: 2026-02-17 Status: Accepted

Context: Need file integrity monitoring for compliance (CIS 1.4, FedRAMP AU-7).

Decision: Use AIDE (Advanced Intrusion Detection Environment) with focused monitoring of critical system directories.

Rationale:

• AIDE is mature, well-supported on Debian
• Lightweight compared to commercial alternatives
• Meets multiple compliance requirements
• Database can be rebuilt if needed

Consequences:

• Initial database creation on first boot (minor delay)
• Regular checks recommended via cron
• False positives if system packages updated legitimately

ADR-006: Comprehensive Audit via auditd

Date: 2026-02-17 Status: Accepted

Context: Need comprehensive audit logging for CIS 6.2, FedRAMP AU-2.

Decision: Use auditd with rules for all major event categories.

Rationale:

• auditd is the Linux standard for audit logging
• Kernel-level monitoring (cannot be bypassed by userspace)
• Structured logs for analysis
• Meets multiple compliance requirements

Consequences:

• Increased log volume (manageable with rotation)
• Performance impact minimal on workstation workloads
• Log retention policy required (90 days set)

ADR-007: SSH Client-Only Mode

Date: 2026-02-17 Status: Accepted

Context: KNEL-Football should have no inbound services.

Decision: Remove SSH server, keep only client tools.

Rationale:

• Reduces attack surface significantly
• Aligns with "outbound only" security model
• User can SSH out to other systems as needed
• No management via SSH (physical console only)

Consequences:

• No remote administration via SSH
• Must use physical console for management
• WireGuard outbound only, no inbound connections

Lessons Learned

1. Shellcheck Warnings Can Be Misleading

   • SC2120/SC2119 warnings were false positives
   • Functions intentionally don't use arguments (generate static config)
   • Used # shellcheck disable sparingly, documented why

2. Compliance Requirements Overlap

   • CIS 1.4 (FIM) → FedRAMP AU-7 → CMMC AU.3.059
   • Single AIDE implementation satisfies all three
   • Document compliance mappings clearly

3. Test Framework Scales Well

   • Adding 80 new tests was straightforward
   • BATS + custom helpers pattern works
   • System tests for VM boot require special handling (libvirt)

Action Items for Future Sessions

1. Rebuild ISO with new security features
2. Run VM boot tests after user logout/login for libvirt
3. Verify FDE runtime behavior in VM
4. Consider Secure Boot implementation
5. Update preseed.cfg to remove hardcoded passwords

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Entry 2026-02-17 (Session 1): Project Assessment and Test Coverage Analysis

Context

Comprehensive project review after session handoff. User requested full orientation and 100% test coverage including VM boot tests, Secure Boot, and FDE runtime tests.

Insights

1. Test Infrastructure Pattern

   • BATS tests work well for static analysis but lack runtime verification
   • Current tests validate file existence and content, not actual behavior
   • Missing entire category: system/integration tests that boot the ISO

2. Docker-Only Workflow is Correct

   • All build/test commands run inside Docker containers
   • Prevents host system pollution
   • Makes builds reproducible across environments
   • Volumes: /workspace (read-only), /build (temp), /output (artifacts)

3. Shellcheck Warnings Are Non-Critical

   • SC2120/SC2119: Functions don't use arguments but called without "$@"
   • SC1091: Source files not available during shellcheck (exist at runtime)
   • Pattern: Functions generate config, don't need arguments

Architectural Decision Records (ADRs)

ADR-001: Two-Tier Security Model

Date: 2026-01-28 (documented 2026-02-17) Status: Accepted

Context: How should KNEL-Football OS access tier0 infrastructure?

Decision: KNEL-Football OS is a secure remote terminal, NOT direct tier0 access. Flow: KNEL-Football OS → WireGuard VPN → Privileged Access Workstation → Tier0

Rationale:

• Defense in depth - multiple hops before tier0
• Compromise of laptop doesn't directly expose tier0
• WireGuard provides encrypted tunnel
• Physical workstation adds another security layer

Consequences:

• Network configuration focuses on WireGuard only
• WiFi/Bluetooth permanently disabled
• SSH configured for key-based auth only

ADR-002: Docker-Only Build Environment

Date: 2026-01-28 (documented 2026-02-17) Status: Accepted

Context: How should ISO builds be executed?

Decision: ALL build operations run inside Docker containers. No host modifications.

Rationale:

• Reproducible builds across different host systems
• No pollution of host environment
• Easy cleanup (just remove containers/images)
• CI/CD friendly

Consequences:

• run.sh wraps all commands with docker run
• ISO build requires --privileged for loop devices
• Output artifacts copied via volume mounts

ADR-003: LUKS2 Over LUKS1

Date: 2026-01-28 (documented 2026-02-17) Status: Accepted

Context: Which disk encryption format to use?

Decision: Use LUKS2 with Argon2id KDF, AES-256-XTS cipher, 512-bit key.

Rationale:

• LUKS2 is newer, more secure format
• Argon2id resists GPU/ASIC attacks better than PBKDF2
• AES-XTS is NIST-approved for disk encryption
• 512-bit key provides security margin

Consequences:

• Modern systems only (older grub may not support)
• Boot requires passphrase entry
• No recovery without passphrase

ADR-004: BATS Without External Libraries

Date: 2026-01-28 (documented 2026-02-17) Status: Accepted

Context: BATS test framework libraries were failing to load.

Decision: Remove bats-support, bats-assert, bats-file dependencies. Use custom assertion functions in tests/test_helper/common.bash.

Rationale:

• External library loading was unreliable
• Custom functions provide same functionality
• Fewer dependencies = fewer failure points
• Easier to debug when tests fail

Consequences:

• Custom assertions must be maintained
• Tests don't benefit from upstream library fixes
• But: simpler, more predictable behavior

Patterns Observed

1. Hook Organization

   • config/hooks/live/ - Runs during live session (before install)
   • config/hooks/installed/ - Runs after installation
   • Pattern: Source shared functions, call main function

2. Script Structure

   #!/bin/bash
   set -euo pipefail
   # Functions that generate config
   main() { ... }
   # Call main if script executed directly
   

3. Test Structure

   #!/usr/bin/env bats
   @test "description" {
       # Setup
       # Exercise
       # Verify
   }
   

Lessons Learned

1. test:iso Command Was Broken

   • run.sh:172 references deleted test-iso.sh
   • Commit c1505a9 removed obsolete scripts including test-iso.sh
   • But run.sh was not updated to remove the command
   • Lesson: When removing files, search for all references

2. Preseed.cfg Has Hardcoded Passwords

   • Lines 28-31 contain default passwords
   • These are installer defaults, should be changed on first boot
   • Security risk if users don't change them
   • Lesson: Consider using installer prompts instead

3. Test Coverage Claim vs Reality

   • Documentation claimed 95% coverage
   • Reality: 100% static analysis, 0% runtime/VM testing
   • Lesson: Be precise about what "coverage" means

Action Items for Future Sessions

1. Implement VM boot tests using libvirt
2. Add Secure Boot support (shim-signed, grub-efi-amd64-signed)
3. Create runtime FDE passphrase prompt tests
4. Remove hardcoded passwords from preseed.cfg
5. Fix shellcheck warnings (low priority, non-critical)

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Entry 2026-01-28: Initial Build Completion

Context

First successful ISO build completed after 72 minutes.

Insights

1. Live-Build Stages

   • bootstrap: Downloads base system (longest stage)
   • chroot: Installs packages, runs hooks
   • binary: Creates ISO filesystem
   • checksum: Generates SHA256/MD5

2. Build Time Breakdown

   • Total: ~72 minutes
   • bootstrap: ~40 minutes (network dependent)
   • chroot: ~20 minutes
   • binary: ~10 minutes

3. ISO Size

   • Final ISO: 450 MB
   • Includes: Debian base, IceWM, WireGuard, security tools
   • Reasonable size for secure workstation

Patterns

1. Docker Volume Strategy

   • /workspace mounted read-only (source code)
   • /build for intermediate files
   • /output for final artifacts
   • Prevents accidental modification of source

2. Checksum Generation

   • Generate both SHA256 and MD5
   • Name checksum files after ISO
   • Copy to output directory with ISO

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