docs: add infrastructure baseline verification report

docs/learnings/2026-02-27-infrastructure-baseline-verification.md

@@ -0,0 +1,56 @@
+---
+description: >-
+  Validation and finalization of the infrastructure baseline for the 
+  mw-pfeddersheim-workstation.
+tags:
+  - infrastructure
+  - ansible
+  - verification
+  - maintenance
+last_updated: '2026-02-27'
+---
+
+# Infrastructure Baseline Verification
+
+## Overview
+
+On February 27, 2026, the initial infrastructure baseline for the `mw-pfeddersheim-workstation` was successfully applied and verified. This process ensured that the workstation adheres to the saTway standards and is ready for higher-level configurations.
+
+## Verification Results
+
+### 1. Ansible Playbook Execution
+The `ansible/workstation.yml` playbook was executed first in `--check` mode and then applied.
+
+- **Status**: Success
+- **Key Changes**:
+  - Optimized kernel parameters (`swappiness`, `inotify`, `cache_pressure`).
+  - Configured `logind` for faster user transitions.
+  - Installed core dev tools (ripgrep, fd, jq, etc.).
+  - Cleaned up legacy VS Code remnants and local AI artifacts.
+  - Verified system maintenance tasks (package cache and journal vacuuming).
+
+### 2. Maintenance Script (`scripts/maintenance.sh`)
+The enhanced maintenance script (v1.1.0) was used to perform deep cleaning and health checks.
+
+- **Status**: Success
+- **Actions Performed**:
+  - Checked for system updates (clean).
+  - Vacuumed systemd journal logs.
+  - Pruned Arch package cache.
+  - **Removed 15 orphaned packages** (Total Removed Size: 387.50 MiB), including legacy headers and obsolete tools.
+  - Pruned Docker system data and volumes.
+  - Pruned `pnpm` global store (Removed 856 files).
+  - Verified repository status (clean on `feat/initial-baseline`).
+
+## Technical Improvements
+
+- **Non-destructive Check Mode**: The maintenance script now supports `--check`, allowing for safe audits.
+- **Robust Error Handling**: Resolved issues with `checkupdates` exit codes and permission requirements for cache size calculations.
+- **Conflict Resolution**: Successfully handled `code-marketplace` conflicts during tool management.
+
+## Baseline State
+The workstation is now in a stable, clean state with a documented baseline. Disk usage is optimized (76% utilized), and all core automation tools are functional.
+
+## Next Steps
+- Finalize the `feat/initial-baseline` branch and merge if applicable.
+- Proceed with dotfiles management and advanced developer environment setup.