diff --git a/.gitignore b/.gitignore
index 254b55c..04d4a03 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,155 +1,45 @@
-# ========================================================
-# Nim / NexusOS
-# ========================================================
-*.nimble
+# Compiled binaries
+nip
+nip-arm64
+nip_release
+nip-v*
+*.exe
+
+# Nim build artifacts
 nimcache/
-nimblecache/
-htmldocs/
-bin/
-learning/
-*.npk
-*.pkg.tar.xz
-*.zst
+build/
+*.o
+*.a
+*.so
+*.dylib
 
-# NimbleOS-specific
-~/.nip/
-/tmp/nexus/
+# Zig artifacts
+.zig-cache/
+zig-out/
+zig-cache/
 
-# ========================================================
-# Temporary & Logs
-# ========================================================
-*.tmp
-*.temp
-*.log
-*.log.*
-temp/
-logs/
-test_output/
-coverage/
+# Test binaries (source is *.nim, compiled tests have no extension)
+tests/test_*
+!tests/test_*.nim
+!tests/test_*.md
 
-# Backups
-*.bak
-*.old
-*.orig
+# IDE / Editor
+.vscode/
+.idea/
 *.swp
 *.swo
 *~
 
-# ========================================================
-# IDE & Editors
-# ========================================================
-.vscode/
-.idea/
-
-# ========================================================
-# Environments
-# ========================================================
-.env
-.venv/
-.kube/
-*.kubeconfig
-
-# ========================================================
-# OS Specific
-# ========================================================
-# macOS
+# OS files
 .DS_Store
-.AppleDouble
-.LSOverride
-Icon
-._*
-.DocumentRevisions-V100
-.fseventsd
-.Spotlight-V100
-.TemporaryItems
-.Trashes
-.VolumeIcon.icns
-.com.apple.timemachine.donotpresent
-.AppleDB
-.AppleDesktop
-Network Trash Folder
-Temporary Items
-.apdisk
+Thumbs.db
 
-# Linux
-*~
-.fuse_hidden*
-.directory
-.Trash-*
-.nfs*
+# Agent / internal (must never appear)
+.agent/
+.claude/
+.kiro/
 
-# ========================================================
-# Build Artifacts
-# ========================================================
-build/
-dist/
-work/
-out/
-
-# ========================================================
-# Terraform
-# ========================================================
-*.tfstate
-*.tfstate.*
-crash.log
-override.tf
-override.tf.json
-.terraform/
-.terraform.lock.hcl
-
-# ========================================================
-# Helm / Kubernetes
-# ========================================================
-charts/
-*.tgz
-values.override.yaml
-
-# ========================================================
-# Node / Svelte
-# ========================================================
-node_modules/
-npm-debug.log*
-yarn-debug.log*
-yarn-error.log*
-.pnpm-debug.log*
-.svelte-kit/
-
-# ========================================================
-# Python
-# ========================================================
-__pycache__/
-*.pyc
-*.pyo
-*.pyd
-*.egg-info/
-.eggs/
-
-# ========================================================
-# Docker
-# ========================================================
-.dockerignore
-docker-compose.override.yml
-
-# ========================================================
-# Proxmox VM Backups
-# ========================================================
-*.vma.zst
-*.vma.lzo
-*.vma.gz
-# Compiled executables
-src/nip.out
-*.out
-
-# Debug and test executables (binaries, not source)
-debug_*
-demo_*
-simple_*
-compute_hashes
-# Test binaries (but not test source files)
-test_use_flags
-test_blake2b
-test_filesystem_integration
-test_generation_filesystem
-test_integrity_monitoring
-test_lockfile_restoration
-test_lockfile_system
\ No newline at end of file
+# Cross-contamination guard
+core/rumpk/
+core/nexus/
+competitors/
diff --git a/examples/json-output-demo.nim b/examples/json-output-demo.nim
old mode 100755
new mode 100644
diff --git a/src/nimpak/filesystem b/src/nimpak/filesystem
deleted file mode 100755
index 755d45a..0000000
Binary files a/src/nimpak/filesystem and /dev/null differ