Support LC paths

* Fix SSH agent forwarding clobbered by local agent in shenv

ssh/rc saves the raw forwarded socket in SSH_REMOTE_AUTH_SOCK before
rewriting SSH_AUTH_SOCK to the stable symlink. shenv was ignoring that
variable, so it saw SSH_AUTH_SOCK as "our link" and fell through to the
systemd lookup, which could overwrite the symlink with a local agent
socket and silently drop the forwarded one.

Now shenv checks SSH_REMOTE_AUTH_SOCK first, giving forwarded sockets
priority over any local agent.

https://claude.ai/code/session_01RhXaFzxJA5D2BcGcz18ipA

* Fix shenv clobbering forwarded SSH socket with local agent in tmux

ssh/rc env changes (including SSH_REMOTE_AUTH_SOCK) are lost because
ssh/rc runs as a sshd child process, not the user's shell. The shell
always receives SSH_AUTH_SOCK set to the raw forwarded socket path.

Fresh SSH login worked fine (step 1 catches the raw socket). The bug
was in tmux new windows: SSH_AUTH_SOCK there is our stable symlink, so
step 1 fails, then steps 2/3 look up the system agent and overwrite the
symlink that ssh/rc just set to the forwarded socket.

Fix: only run the system agent lookup when the stable symlink is already
broken. A valid symlink means ssh/rc (or a previous shenv run) already
set it correctly; don't clobber it.

https://claude.ai/code/session_01RhXaFzxJA5D2BcGcz18ipA

* Remove pointless exports from ssh/rc, add process-model comment

ssh/rc runs as a sshd child process so exports never reach the user's
shell. SSH_REMOTE_AUTH_SOCK was set and exported but never used (a
leftover from a prior failed fix attempt). SSH_AUTH_SOCK was reassigned
to the symlink path and exported, also to no effect. Remove both.

https://claude.ai/code/session_01RhXaFzxJA5D2BcGcz18ipA

---------

Co-authored-by: Claude <noreply@anthropic.com>

Brewfile

@@ -1,4 +1,5 @@
 tap "dart-lang/dart"
+tap "holtwick/tap"
 tap "sass/sass"
 
 brew "ack"
@@ -8,11 +9,11 @@ brew "autoconf"
 brew "automake"
 brew "b2-tools"
 brew "bat"
-brew "bazelisk"
 brew "binwalk"
 brew "cask"
 brew "ccache"
 brew "certbot"
+brew "cloudflared"
 brew "cmake"
 brew "colima"
 brew "devcontainer"
@@ -20,8 +21,11 @@ brew "dfu-util"
 brew "difftastic"
 brew "direnv"
 brew "duck"
+brew "dust"
 brew "earthly"
 brew "esptool"
+brew "fish"
+brew "fq"
 brew "gh"
 brew "ghidra", link: false
 brew "git"
@@ -31,14 +35,18 @@ brew "gnupg"
 brew "go"
 brew "gradle"
 brew "hf"
+brew "holtwick/tap/bx"
 brew "htop"
 brew "httpie"
-brew "huggingface-cli"
 brew "hugo"
 brew "imagemagick"
 brew "john-jumbo"
 brew "jq"
+brew "kubeconform"
+brew "kubectx"
+brew "librsvg"
 brew "lima"
+brew "minikube"
 brew "mise"
 brew "mosh"
 brew "neovim"
@@ -52,6 +60,7 @@ brew "pkgconf"
 brew "protobuf"
 brew "pwgen"
 brew "pwntools"
+brew "python@3.13"
 brew "qemu"
 brew "restic"
 brew "ripgrep"
@@ -93,6 +102,7 @@ cask "rectangle"
 cask "scroll-reverser"
 cask "temurin"
 cask "veracrypt"
+cask "wezterm"
 cask "zulu@17"
 
 def is_corp?
@@ -100,13 +110,22 @@ def is_corp?
   `profiles status -type enrollment 2>/dev/null`.include?("Enrolled via DEP: Yes")
 end
 
+if is_corp?
+  brew "bazelisk", link: false
+end
+
 # non-corp
 if !is_corp?
-  brew "bazel"
+  brew "bazelisk"
   brew "openssh"
+  brew "virt-manager"
+
   cask "claude-code"
   cask "cryptomator"
+  cask "keepassxc"
   cask "gcloud-cli"
   cask "google-cloud-sdk"
+  cask "keybase"
   cask "orbstack"
+  cask "jordanbaird-ice"
 end

bin/disk-benchmark

@@ -12,8 +12,17 @@ fi
 
 trap "test -f ${FILENAME} && rm -f ${FILENAME}" EXIT
 
+IOENGINE="libaio"
+DIRECT=1
+if [ "$(uname)" = "Darwin" ]; then
+  IOENGINE="posixaio"
+  # macOS doesn't support O_DIRECT in the same way, but fio's direct=1 
+  # handles it via F_NOCACHE if supported.
+  DIRECT=1
+fi
+
 fio --loops=5 --size=${BENCHMARK_SIZE} --filename=${FILENAME} \
-  --stonewall --ioengine=libaio --direct=1 \
+  --stonewall --ioengine=${IOENGINE} --direct=${DIRECT} \
   --name=Seqread --bs=1m --rw=read \
   --name=Seqwrite --bs=1m --rw=write \
   --name=512Kread --bs=512k --rw=randread \

bin/google-chrome-burp

@@ -1,6 +1,10 @@
 #!/bin/bash
 
 CHROME_BINS="google-chrome-beta google-chrome"
+if [ "$(uname)" = "Darwin" ]; then
+  CHROME_BINS="${CHROME_BINS} /Applications/Google\ Chrome\ Beta.app/Contents/MacOS/Google\ Chrome\ Beta /Applications/Google\ Chrome.app/Contents/MacOS/Google\ Chrome"
+fi
+
 for bin in ${CHROME_BINS} ; do
   if command -v ${bin} >/dev/null 2>&1 ; then
     CHROME=$(command -v ${bin})
@@ -18,4 +22,4 @@ export HOME=${HOME}/.chrome-pentest
 mkdir -p ${HOME}
 
 # Launch chrome for burp
-exec ${CHROME} --user-data-dir=${HOME}/chrome-pentest --proxy-server=127.0.0.1:8080
+exec "${CHROME}" --user-data-dir=${HOME}/chrome-pentest --proxy-server=127.0.0.1:8080

bin/macos/update_brewfile

@@ -251,7 +251,13 @@ def main(args):
             if last_type and e.pkg_type != last_type:
                 output_lines.append("")
             last_type = e.pkg_type
-        output_lines.extend(e.to_lines())
+
+        lines = e.to_lines()
+        # If we just added a blank line, and the new lines start with one, skip the first new line
+        if output_lines and output_lines[-1] == "" and lines and lines[0] == "":
+            output_lines.extend(lines[1:])
+        else:
+            output_lines.extend(lines)
 
     new_content = "\n".join(output_lines)
     if footer:

bin/newnote

@@ -0,0 +1,212 @@
+#!/usr/bin/env bash
+
+# Exit on error, undefined variables, and pipe failures
+set -euo pipefail
+
+show_help() {
+  cat << EOF
+Usage: $(basename "$0") [options] <note_name_or_path>
+
+Create a new note in your Obsidian vault.
+
+Options:
+  -v, --vault <dir>      Specify the Obsidian vault directory.
+  --overwrite            Overwrite the file if it already exists.
+  -h, --help             Show this help message.
+EOF
+}
+
+VAULT_DIR=""
+OVERWRITE="false"
+NOTE_PATH=""
+
+# Parse arguments
+while [[ $# -gt 0 ]]; do
+  case "$1" in
+    -v|--vault)
+      if [[ -z "${2:-}" ]]; then
+        echo "Error: --vault requires a directory path." >&2
+        exit 1
+      fi
+      VAULT_DIR="$2"
+      shift 2
+      ;;
+    --overwrite)
+      OVERWRITE="true"
+      shift
+      ;;
+    -h|--help)
+      show_help
+      exit 0
+      ;;
+    -*)
+      echo "Error: Unknown option: $1" >&2
+      show_help
+      exit 1
+      ;;
+    *)
+      if [[ -n "$NOTE_PATH" ]]; then
+        echo "Error: Multiple note paths provided: $NOTE_PATH and $1" >&2
+        exit 1
+      fi
+      NOTE_PATH="$1"
+      shift
+      ;;
+  esac
+done
+
+if [[ -z "$NOTE_PATH" ]]; then
+  echo "Error: Missing note path/name." >&2
+  show_help
+  exit 1
+fi
+
+# 1. Find the Obsidian vault.
+if [[ -n "$VAULT_DIR" ]]; then
+  # -v/--vault was passed. Check that the directory exists and contains a .obsidian directory.
+  if [[ ! -d "$VAULT_DIR" ]]; then
+    echo "Error: Specified vault directory does not exist: $VAULT_DIR" >&2
+    exit 1
+  fi
+  if [[ ! -d "$VAULT_DIR/.obsidian" ]]; then
+    echo "Error: Specified directory is not an Obsidian vault (missing .obsidian): $VAULT_DIR" >&2
+    exit 1
+  fi
+  VAULT_DIR="$(cd "$VAULT_DIR" && pwd)"
+else
+  # Search directories upward for a parent (or current) directory containing a .obsidian subdirectory.
+  # Stop at the user's home directory or a filesystem boundary.
+  CURRENT_DIR="$PWD"
+  FOUND_VAULT=""
+
+  get_device_id() {
+    local dir="$1"
+    if [[ "$(uname)" == "Darwin" ]]; then
+      stat -f '%d' "$dir" 2>/dev/null || echo ""
+    else
+      stat -c '%d' "$dir" 2>/dev/null || echo ""
+    fi
+  }
+
+  CURRENT_DEV="$(get_device_id "$CURRENT_DIR")"
+
+  while [[ "$CURRENT_DIR" != "/" && "$CURRENT_DIR" != "$HOME" ]]; do
+    if [[ -d "$CURRENT_DIR/.obsidian" ]]; then
+      FOUND_VAULT="$CURRENT_DIR"
+      break
+    fi
+
+    PARENT_DIR="$(dirname "$CURRENT_DIR")"
+    if [[ "$PARENT_DIR" == "$CURRENT_DIR" ]]; then
+      break
+    fi
+
+    # Check filesystem boundary
+    PARENT_DEV="$(get_device_id "$PARENT_DIR")"
+    if [[ -n "$CURRENT_DEV" && -n "$PARENT_DEV" && "$CURRENT_DEV" != "$PARENT_DEV" ]]; then
+      break
+    fi
+
+    CURRENT_DIR="$PARENT_DIR"
+    CURRENT_DEV="$PARENT_DEV"
+  done
+
+  # Check the last checked directory (could be HOME or /)
+  if [[ -z "$FOUND_VAULT" && -d "$CURRENT_DIR/.obsidian" ]]; then
+    FOUND_VAULT="$CURRENT_DIR"
+  fi
+
+  if [[ -n "$FOUND_VAULT" ]]; then
+    VAULT_DIR="$FOUND_VAULT"
+  else
+    # Fallback paths in order: ~/Notes, ~/Obsidian/Notes, ~/Personal/Notes, ~/Projects/Notes.
+    FALLBACKS=(
+      "$HOME/Notes"
+      "$HOME/notes"
+      "$HOME/Obsidian/Notes"
+      "$HOME/Obsidian/notes"
+      "$HOME/Personal/Notes"
+      "$HOME/Personal/notes"
+      "$HOME/Projects/Notes"
+      "$HOME/Projects/notes"
+    )
+    for path in "${FALLBACKS[@]}"; do
+      if [[ -d "$path" && -d "$path/.obsidian" ]]; then
+        VAULT_DIR="$(cd "$path" && pwd)"
+        break
+      fi
+    done
+  fi
+fi
+
+if [[ -z "$VAULT_DIR" ]]; then
+  echo "Error: Could not find an Obsidian vault. Please specify one with -v/--vault." >&2
+  exit 1
+fi
+
+# Strip leading slash from NOTE_PATH to handle relative paths properly
+NOTE_PATH="${NOTE_PATH#/}"
+
+# 2. Determine if current working directory is within the vault.
+# Resolve physical paths to handle symlinks cleanly.
+RESOLVED_PWD="$(pwd -P)"
+RESOLVED_VAULT="$(cd "$VAULT_DIR" && pwd -P)"
+
+if [[ "$RESOLVED_PWD" == "$RESOLVED_VAULT" || "$RESOLVED_PWD" == "$RESOLVED_VAULT"/* ]]; then
+  # Within the vault, treat relative to CWD
+  TARGET_FILE="$PWD/$NOTE_PATH"
+else
+  # Not within the vault, treat relative to vault root
+  TARGET_FILE="$VAULT_DIR/$NOTE_PATH"
+fi
+
+TARGET_DIR="$(dirname "$TARGET_FILE")"
+TARGET_BASE="$(basename "$TARGET_FILE")"
+
+# If there's no file extension on the argument, add .md.
+if [[ "$TARGET_BASE" != *.* ]]; then
+  TARGET_BASE="$TARGET_BASE.md"
+fi
+
+TARGET_FILE="$TARGET_DIR/$TARGET_BASE"
+
+# If the necessary directory components don't exist, create them.
+if [[ ! -d "$TARGET_DIR" ]]; then
+  mkdir -p "$TARGET_DIR"
+fi
+
+# 3. If the file exists and there's no --overwrite argument, throw an error.
+if [[ -f "$TARGET_FILE" && "$OVERWRITE" != "true" ]]; then
+  echo "Error: File already exists: $TARGET_FILE (use --overwrite to replace it)" >&2
+  exit 1
+fi
+
+# 4. If the path ends in .md (case-insensitive), generate appropriate YAML front matter and write it to the new file.
+if [[ "${TARGET_BASE,,}" == *.md ]]; then
+  NOTE_TITLE="${TARGET_BASE%.*}"
+  CURRENT_DATE="$(date +"%Y-%m-%d %H:%M")"
+
+  cat << EOF > "$TARGET_FILE"
+---
+title: "$NOTE_TITLE"
+date: $CURRENT_DATE
+tags: []
+---
+
+EOF
+else
+  # Just touch the file to ensure it exists
+  touch "$TARGET_FILE"
+fi
+
+# 5. Open the user's $EDITOR (falling back to vim/vi if unset) pointing to the new file.
+EDITOR="${EDITOR:-}"
+if [[ -z "$EDITOR" ]]; then
+  if command -v vim >/dev/null 2>&1; then
+    EDITOR="vim"
+  else
+    EDITOR="vi"
+  fi
+fi
+
+exec "$EDITOR" "$TARGET_FILE"

bin/quartz

@@ -0,0 +1,63 @@
+#!/bin/bash
+
+set -euo pipefail
+
+# QUARTZ_DIR search logic
+if [ -z "${QUARTZ_DIR:-}" ]; then
+    if [ -f "quartz.config.ts" ]; then
+        QUARTZ_DIR="$PWD"
+    elif [ -d "$HOME/Personal/notes-quartz" ]; then
+        QUARTZ_DIR="$HOME/Personal/notes-quartz"
+    elif [ -d "$HOME/Projects/notes-quartz" ]; then
+        QUARTZ_DIR="$HOME/Projects/notes-quartz"
+    else
+        echo "Error: QUARTZ_DIR could not be found." >&2
+        exit 1
+    fi
+fi
+
+if [ ! -d "$QUARTZ_DIR" ]; then
+    echo "Error: QUARTZ_DIR '$QUARTZ_DIR' is not a directory." >&2
+    exit 1
+fi
+
+# NOTES_DIR search logic
+PARSE_NOTES_DIR=""
+# Use a copy of args to find -d/--directory
+ARGS=("$@")
+for ((i=0; i<${#ARGS[@]}; i++)); do
+    if [[ "${ARGS[i]}" == "-d" || "${ARGS[i]}" == "--directory" ]]; then
+        if [[ $((i+1)) -lt ${#ARGS[@]} ]]; then
+            PARSE_NOTES_DIR="${ARGS[i+1]}"
+        fi
+        break
+    fi
+done
+
+if [ -n "$PARSE_NOTES_DIR" ]; then
+    NOTES_DIR="$PARSE_NOTES_DIR"
+elif [ -z "${NOTES_DIR:-}" ]; then
+    if [ -d "$HOME/Notes" ]; then
+        NOTES_DIR="$HOME/Notes"
+    elif [ -d "$HOME/Personal/notes" ]; then
+        NOTES_DIR="$HOME/Personal/notes"
+    elif [ -d "$HOME/Projects/notes" ]; then
+        NOTES_DIR="$HOME/Projects/notes"
+    else
+        echo "Error: NOTES_DIR could not be found." >&2
+        exit 1
+    fi
+fi
+
+if [ ! -d "$NOTES_DIR" ]; then
+    echo "Error: NOTES_DIR '$NOTES_DIR' is not a directory." >&2
+    exit 1
+fi
+
+cd "$QUARTZ_DIR"
+
+# Run npx quartz
+# Following the prompt's structure but using NOTES_DIR for the flag
+# npx quartz ${argv[1]} --directory ${NOTES_DIR} "$@"
+# We use ${1:-} for argv[1] to handle cases with no arguments.
+npx quartz "${1:-}" --directory "$NOTES_DIR" "$@"

bin/screenshot.sh

@@ -5,8 +5,14 @@
 set -ue
 
 TOOLS="flameshot scrot"
+if [ "$(uname)" = "Darwin" ]; then
+  TOOLS="screencapture ${TOOLS}"
+fi
+
 SCREENDIR=${SCREENDIR:-${HOME}/Pictures/Screenshots}
 SCROT_FORMAT="%F-%T.png"
+# Filename for screencapture
+FILE_NAME=$(date "+%Y-%m-%d-%H%M%S.png")
 
 function default_screenshot_command {
   for tool in ${TOOLS} ; do
@@ -41,10 +47,29 @@ function scrot_full_capture {
   scrot "${SCREENDIR}/${SCROT_FORMAT}"
 }
 
+function mac_capture {
+  local mode="${1}"
+  local target="${SCREENDIR}/${FILE_NAME}"
+  case "${mode}" in
+    region)
+      screencapture -i "${target}"
+      ;;
+    window)
+      screencapture -i -w "${target}"
+      ;;
+    full)
+      screencapture "${target}"
+      ;;
+  esac
+}
+
 case "${CMD}" in
   region|window|full)
     mkdir -p "${SCREENDIR}"
     case "${TOOL}" in
+      screencapture)
+        mac_capture "${CMD}"
+        ;;
       flameshot)
         case "${CMD}" in
           region|window)

bin/update-authorized-keys

@@ -0,0 +1,310 @@
+#!/usr/bin/env bash
+
+# update-authorized-keys - Manage ~/.ssh/authorized_keys from multiple sources
+#
+# BEHAVIOR:
+# 1. Collects SSH public keys from one or more source directories (default: ~/.ssh/authorized_keys.d).
+# 2. Skips empty files and files symlinked to /dev/null (masking).
+# 3. Deterministically concatenates keys into a "managed block" wrapped in markers:
+#    # BEGIN UPDATE-AUTHORIZED-KEYS
+#    # END UPDATE-AUTHORIZED-KEYS
+# 4. Deduplicates managed keys: if the same key (including options) is found in multiple files,
+#    it is included once with a comment listing all source filenames.
+# 5. Preserves "manual" keys found in the target file outside the markers.
+# 6. Removes manual keys that exactly match a managed key (options + key data).
+# 7. Validates every proposed key individually using 'ssh-keygen -l -f'.
+# 8. Optionally validates the whole file with 'authorized-keys-test' if available.
+# 9. Displays a unified diff and prompts for confirmation before atomic replacement.
+# 10. Supports a --dry-run mode and a --self-test mode for verifying logic.
+
+set -o nounset
+set -o errexit
+set -o pipefail
+
+CLEANUP_FILES=()
+cleanup() {
+    rm -rf "${CLEANUP_FILES[@]}"
+}
+trap cleanup EXIT
+
+# Configuration
+DEFAULT_DIR="${HOME}/.ssh/authorized_keys.d"
+DEFAULT_TARGET="${HOME}/.ssh/authorized_keys"
+BEGIN_MARKER="# BEGIN UPDATE-AUTHORIZED-KEYS"
+END_MARKER="# END UPDATE-AUTHORIZED-KEYS"
+
+# State
+SOURCE_DIRS=()
+TARGET_FILE="${DEFAULT_TARGET}"
+DRY_RUN=0
+
+usage() {
+    cat <<EOF
+Usage: $(basename "$0") [options]
+
+Options:
+  --dir DIR         Primary directory for managed keys (default: ${DEFAULT_DIR})
+  --extra-dir DIR   Additional directory to scan for keys (can be repeated)
+  --target FILE     Target authorized_keys file (default: ${DEFAULT_TARGET})
+  --dry-run         Show changes and validate without modifying the target
+  --self-test       Run internal suite of tests to verify script logic
+  --help            Show this help message
+EOF
+}
+
+run_self_test() {
+    echo "Running self-test..."
+    local test_root=$(mktemp -d)
+    CLEANUP_FILES+=("${test_root}")
+    
+    local d1="${test_root}/d1"
+    local d2="${test_root}/d2"
+    local target="${test_root}/target"
+    mkdir -p "${d1}" "${d2}"
+    
+    local key1="ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIJ8XoR7N7X5XoR7N7X5XoR7N7X5XoR7N7X5XoR7N7X5X key1"
+    local key2="ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIL9YpS8O8Y6YpS8O8Y6YpS8O8Y6YpS8O8Y6YpS8O8Y6Y key2"
+    local key_man="ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIM0ZqT9P9Z7ZqT9P9Z7ZqT9P9Z7ZqT9P9Z7ZqT9P9Z7Z manual"
+    local long_opt="environment=\"VAR=VERY_LONG_VALUE_THAT_EXCEEDS_TWENTY_CHARS\""
+    
+    echo "${key1}" > "${d1}/k1"
+    echo "${key1}" > "${d2}/k1_dup"
+    echo "${key2}" > "${d2}/k2"
+    echo "${long_opt} ${key1}" > "${d1}/k1_long"
+    echo "${long_opt} ${key2}" > "${d1}/k2_long"
+    ln -s /dev/null "${d1}/masked"
+    
+    cat <<EOF > "${target}"
+${key_man}
+${key1} # This should be removed as it's now managed
+EOF
+
+    echo "Executing script in test mode..."
+    # Pipe "y" to handle the TTY check if we are not in a TTY during test
+    echo "y" | "$0" --dir "${d1}" --extra-dir "${d2}" --target "${target}" > /dev/null
+    
+    local content=$(cat "${target}")
+    
+    echo -n "Check markers... "
+    if [[ "${content}" == *"${BEGIN_MARKER}"* && "${content}" == *"${END_MARKER}"* ]]; then echo "OK"; else echo "FAIL"; exit 1; fi
+    
+    echo -n "Check managed deduplication... "
+    if grep -q "Source: k1, k1_dup" "${target}"; then echo "OK"; else echo "FAIL"; exit 1; fi
+    
+    echo -n "Check long option deduplication (should NOT deduplicate different keys)... "
+    if grep -q "k1_long" "${target}" && grep -q "k2_long" "${target}"; then echo "OK"; else echo "FAIL"; exit 1; fi
+
+    echo -n "Check manual key preservation... "
+    if grep -q "manual" "${target}"; then echo "OK"; else echo "FAIL"; exit 1; fi
+    
+    echo -n "Check manual key filtering... "
+    local manual_count=$(grep -c "${key1}" "${target}")
+    # key1 appears twice in managed block (once plain, once with long opt) 
+    # and it was in manual block. The manual one should be removed.
+    # So we expect 2 occurrences in the final file (both in managed block).
+    if [[ ${manual_count} -eq 2 ]]; then echo "OK"; else echo "FAIL (Found ${manual_count} occurrences, expected 2)"; exit 1; fi
+    
+    echo -n "Check masking... "
+    if ! grep -q "masked" "${target}"; then echo "OK"; else echo "FAIL"; exit 1; fi
+
+    echo "Self-test passed successfully!"
+    exit 0
+}
+
+# Parse arguments
+while [[ $# -gt 0 ]]; do
+    case "$1" in
+        --dir) 
+            [[ -z "${2:-}" ]] && { echo "Error: --dir requires an argument" >&2; exit 1; }
+            SOURCE_DIRS+=("$2"); shift 2 ;;
+        --extra-dir) 
+            [[ -z "${2:-}" ]] && { echo "Error: --extra-dir requires an argument" >&2; exit 1; }
+            SOURCE_DIRS+=("$2"); shift 2 ;;
+        --target) 
+            [[ -z "${2:-}" ]] && { echo "Error: --target requires an argument" >&2; exit 1; }
+            TARGET_FILE="$2"; shift 2 ;;
+        --dry-run) DRY_RUN=1; shift ;;
+        --self-test) run_self_test ;;
+        --help) usage; exit 0 ;;
+        *) echo "Unknown option: $1" >&2; usage; exit 1 ;;
+    esac
+done
+
+if [[ ${#SOURCE_DIRS[@]} -eq 0 ]]; then
+    SOURCE_DIRS+=("${DEFAULT_DIR}")
+fi
+
+mkdir -p "$(dirname "${TARGET_FILE}")"
+TMP_FILE=$(mktemp)
+CLEANUP_FILES+=("${TMP_FILE}")
+
+collect_keys() {
+    local dirs=("${@}")
+    for dir in "${dirs[@]}"; do
+        if [[ ! -d "${dir}" ]]; then continue; fi
+        # Use a glob to avoid parsing ls
+        for file in "${dir}"/*; do
+            [[ ! -e "${file}" ]] && continue
+            [[ ! -f "${file}" || ! -s "${file}" ]] && continue
+            if [[ -L "${file}" && "$(readlink "${file}")" == "/dev/null" ]]; then continue; fi
+            while read -r line; do
+                [[ -z "${line}" || "${line}" =~ ^[[:space:]]*# ]] && continue
+                # Use a specific delimiter that is unlikely to be in the key or filename
+                # If using tabs, ensure we only split on the first one in AWK
+                printf "%s\t%s\n" "$(basename "${file}")" "${line}"
+            done < "${file}"
+        done
+    done
+}
+
+# Use a HEREDOC for the complex AWK script to avoid shell interpolation issues
+MANAGED_BLOCK=$(collect_keys "${SOURCE_DIRS[@]}" | awk -F'\t' '
+{
+    # Splitting on the first tab manually to be robust
+    tab_idx = index($0, "\t")
+    source = substr($0, 1, tab_idx - 1)
+    full_line = substr($0, tab_idx + 1)
+    
+    # Signature detection: all options + key type + key data
+    # (Excludes the comment at the end)
+    n = split(full_line, parts, " ")
+    sig = ""
+    for (i=1; i<=n; i++) {
+        sig = (sig == "" ? parts[i] : sig " " parts[i])
+        # A key line is [options] <type> <base64> [comment]
+        # We stop after the base64 part. Key types start with known prefixes.
+        if (parts[i] ~ /^(ssh-|ecdsa-|sk-)/ && i < n) {
+            sig = sig " " parts[i+1]
+            break
+        }
+    }
+    # Fallback if no key type found (should not happen with valid keys)
+    if (sig == "") sig = full_line
+
+    if (!(sig in keys)) {
+        keys[sig] = full_line
+        order[++count] = sig
+    }
+    sources[sig] = (sources[sig] ? sources[sig] ", " : "") source
+}
+END {
+    for (i=1; i<=count; i++) {
+        sig = order[i]
+        print "# Source: " sources[sig]
+        print keys[sig]
+    }
+}')
+
+MANUAL_KEYS=""
+if [[ -f "${TARGET_FILE}" ]]; then
+    MANUAL_KEYS=$(awk -v begin="${BEGIN_MARKER}" -v end="${END_MARKER}" '
+    BEGIN { inside=0 }
+    $0 == begin { inside=1; next }
+    $0 == end { inside=0; next }
+    !inside { print $0 }
+    ' "${TARGET_FILE}")
+fi
+
+MANAGED_SIGS_TMP=$(mktemp)
+echo "${MANAGED_BLOCK}" | awk '/^[^#]/ {
+    n = split($0, parts, " ")
+    sig = ""
+    for (i=1; i<=n; i++) {
+        sig = (sig == "" ? parts[i] : sig " " parts[i])
+        if (parts[i] ~ /^(ssh-|ecdsa-|sk-)/ && i < n) {
+            sig = sig " " parts[i+1]
+            break
+        }
+    }
+    if (sig != "") print sig
+}' > "${MANAGED_SIGS_TMP}"
+
+FINAL_MANUAL_KEYS=$(echo "${MANUAL_KEYS}" | awk -v sigs_file="${MANAGED_SIGS_TMP}" '
+BEGIN {
+    while ((getline line < sigs_file) > 0) {
+        managed[line] = 1
+    }
+    close(sigs_file)
+}
+{
+    if ($0 ~ /^[[:space:]]*$/ || $0 ~ /^[[:space:]]*#/) {
+        print $0
+        next
+    }
+    n = split($0, parts, " ")
+    sig = ""
+    for (i=1; i<=n; i++) {
+        sig = (sig == "" ? parts[i] : sig " " parts[i])
+        if (parts[i] ~ /^(ssh-|ecdsa-|sk-)/ && i < n) {
+            sig = sig " " parts[i+1]
+            break
+        }
+    }
+    if (!(sig in managed)) {
+        print $0
+    }
+}')
+rm -f "${MANAGED_SIGS_TMP}"
+
+{
+    if [[ -n "${MANAGED_BLOCK}" ]]; then
+        echo "${BEGIN_MARKER}"
+        echo "${MANAGED_BLOCK}"
+        echo "${END_MARKER}"
+    fi
+    echo "${FINAL_MANUAL_KEYS}"
+} > "${TMP_FILE}"
+
+echo "Validating proposed changes..."
+VALID=1
+while read -r line; do
+    [[ -z "${line}" || "${line}" =~ ^[[:space:]]*# ]] && continue
+    if ! echo "${line}" | ssh-keygen -l -f - >/dev/null 2>&1; then
+        echo "ERROR: Invalid SSH key detected: ${line}" >&2
+        VALID=0
+    fi
+done < "${TMP_FILE}"
+
+if command -v authorized-keys-test >/dev/null 2>&1; then
+    if ! authorized-keys-test "${TMP_FILE}"; then
+        echo "ERROR: Proposed file failed authorized-keys-test." >&2
+        VALID=0
+    fi
+fi
+
+if [[ ${VALID} -eq 0 ]]; then
+    echo "Validation failed. Aborting." >&2
+    exit 1
+fi
+
+if [[ -f "${TARGET_FILE}" ]]; then
+    diff -u "${TARGET_FILE}" "${TMP_FILE}" || true
+else
+    echo "Target file does not exist. Proposed content:"
+    cat "${TMP_FILE}"
+fi
+
+if [[ ${DRY_RUN} -eq 1 ]]; then
+    echo "Dry run complete. No changes made."
+    exit 0
+fi
+
+if [[ -t 0 ]]; then
+    echo -n "Apply these changes to ${TARGET_FILE}? [y/N] "
+    read -r response
+elif [[ ! -t 0 ]]; then
+    # Read from pipe or file if provided
+    if ! read -r response; then
+        echo "Non-interactive shell detected and no input provided. Aborting."
+        exit 1
+    fi
+fi
+
+if [[ "${response}" =~ ^([yY][eE][sS]|[yY])$ ]]; then
+    chmod 0600 "${TMP_FILE}"
+    mv "${TMP_FILE}" "${TARGET_FILE}"
+    echo "Changes applied successfully."
+else
+    echo "Aborted."
+    exit 1
+fi

dotfiles/aliases

@@ -1,9 +1,6 @@
 # General aliases, should only be sourced in interactive shells
 # Try to keep in sync with ~/.config/fish/conf.d/aliases.fish
 
-# Cryptsetup alias
-alias luksFormat='cryptsetup luksFormat --type=luks2 --pbkdf-memory=2560000 --pbkdf=argon2id -i 15000 -s 512 -h sha256 -c aes-xts-plain64'
-
 # Timestamp in a machine-sortable form
 alias tstamp="date '+%Y%m%d-%H%M%S'"
 
@@ -13,12 +10,6 @@ alias mdcode="sed 's/^/    /'"
 # Intel format plz
 alias objdump="command objdump -M intel"
 
-# Drop caches for swap issues
-alias drop_caches="echo 3 | sudo /usr/bin/tee /proc/sys/vm/drop_caches"
-
-# dump acpi temperature
-alias gettemp='printf "%02.2f\n" "$(cat /sys/class/thermal/thermal_zone0/temp)e-3"'
-
 # get git working directory
 alias gitroot="git rev-parse --show-toplevel"
 
@@ -31,20 +22,37 @@ alias ipy="ipython3 --no-banner"
 # Skip the header on bc
 alias bc="command bc -q"
 
-# Get a decently readable df
-alias dfh="df -h -x tmpfs -x devtmpfs -x squashfs -x fuse -x efivarfs"
-
 # Clear the GPG agent
 alias clear-gpg-agent="echo RELOADAGENT | gpg-connect-agent"
 
-# Battery details
-alias bat-details='upower -i $(upower -e | grep battery)'
-
-# Nvidia refresh rate
-alias nvidia-refresh-rate='nvidia-settings --display=:0 -q RefreshRate -t'
-
 # Earthly ssh
 alias earthly='earthly --ssh-auth-sock ""'
 
-# to clipboard
+if [ "$(uname)" = "Linux" ]; then
-alias toclip='xclip -selection clipboard'
+  # Cryptsetup alias
+  alias luksFormat='cryptsetup luksFormat --type=luks2 --pbkdf-memory=2560000 --pbkdf=argon2id -i 15000 -s 512 -h sha256 -c aes-xts-plain64'
+
+  # Drop caches for swap issues
+  alias drop_caches="echo 3 | sudo /usr/bin/tee /proc/sys/vm/drop_caches"
+
+  # dump acpi temperature
+  alias gettemp='printf "%02.2f\n" "$(cat /sys/class/thermal/thermal_zone0/temp)e-3"'
+
+  # Get a decently readable df
+  alias dfh="df -h -x tmpfs -x devtmpfs -x squashfs -x fuse -x efivarfs"
+
+  # Battery details
+  alias bat-details='upower -i $(upower -e | grep battery)'
+
+  # Nvidia refresh rate
+  alias nvidia-refresh-rate='nvidia-settings --display=:0 -q RefreshRate -t'
+
+  # to clipboard
+  alias toclip='xclip -selection clipboard'
+elif [ "$(uname)" = "Darwin" ]; then
+  # Get a decently readable df
+  alias dfh="df -h"
+
+  # to clipboard
+  alias toclip='pbcopy'
+fi

dotfiles/bxignore

@@ -0,0 +1,4 @@
+# Credentials
+.ssh
+Passwords.kdbx
+Passwords.kdbx.age

dotfiles/commonrc.sh

@@ -0,0 +1,63 @@
+#!/bin/sh
+# shellcheck disable=SC1090
+
+# common functions for use in shell scripts
+
+find_first() {
+  while [ "$#" -gt 0 ]; do
+    if test -e "${1}" ; then
+      echo "${1}"
+      return 0
+    fi
+    shift
+  done
+  return 1
+}
+
+have_command() {
+  command -v "$1" >/dev/null 2>&1
+}
+
+# Helper function: Returns 0 if the directory is in PATH, 1 otherwise
+path_contains() {
+  case ":${PATH}:" in
+    *:"$1":*) return 0 ;;
+    *)        return 1 ;;
+  esac
+}
+
+# Prepend a directory to PATH if it's not already there
+path_prepend() {
+  if [ -d "$1" ] && ! path_contains "$1"; then
+    PATH="$1:${PATH}"
+  fi
+}
+
+# Append a directory to PATH if it's not already there
+path_append() {
+  if [ -d "$1" ] && ! path_contains "$1"; then
+    PATH="${PATH}:$1"
+  fi
+}
+
+source_first_existing() {
+  _sfe_script="$(find_first "$@")"
+  _sfe_status=$?
+
+  if [ "$_sfe_status" -eq 0 ]; then
+    . "$_sfe_script"
+    # Clean up our temporary variables before returning success
+    unset -v _sfe_script _sfe_status
+    return 0
+  fi
+
+  # Clean up our temporary variables before returning failure
+  unset -v _sfe_script _sfe_status
+  return 1
+}
+
+source_if_existing() {
+  if [ -f "$1" ]; then
+    . "$1"
+  fi
+}

dotfiles/config/fish/conf.d/aliases.fish

@@ -1,6 +1,3 @@
-# Cryptsetup alias
-alias luksFormat 'cryptsetup luksFormat --type=luks2 --pbkdf-memory=2560000 --pbkdf=argon2id -i 15000 -s 512 -h sha256 -c aes-xts-plain64'
-
 # Timestamp in a machine-sortable form
 alias tstamp "date '+%Y%m%d-%H%M%S'"
 
@@ -10,12 +7,6 @@ alias mdcode "sed 's/^/    /'"
 # Intel format plz
 alias objdump "command objdump -M intel"
 
-# Drop caches for swap issues
-alias drop_caches "echo 3 | sudo /usr/bin/tee /proc/sys/vm/drop_caches"
-
-# dump acpi temperature
-alias gettemp 'printf "%02.2f\n" (cat /sys/class/thermal/thermal_zone0/temp)e-3'
-
 # get git working directory
 alias gitroot "git rev-parse --show-toplevel"
 
@@ -28,23 +19,40 @@ alias ipy "ipython3 --no-banner"
 # Skip the header on bc
 alias bc "command bc -q"
 
-# Get a decently readable df
-alias dfh "df -h -x tmpfs -x devtmpfs -x squashfs -x fuse -x efivarfs"
-
 # Clear the GPG agent
 alias clear-gpg-agent "echo RELOADAGENT | gpg-connect-agent"
 
-# Battery details
-alias bat-details 'upower -i (upower -e | grep battery)'
-
-# Nvidia refresh rate
-alias nvidia-refresh-rate 'nvidia-settings --display=:0 -q RefreshRate -t'
-
 # Earthly ssh
 alias earthly 'earthly --ssh-auth-sock ""'
 
-# to clipboard
+if test (uname) = "Linux"
-alias toclip 'xclip -selection clipboard'
+  # Cryptsetup alias
+  alias luksFormat 'cryptsetup luksFormat --type=luks2 --pbkdf-memory=2560000 --pbkdf=argon2id -i 15000 -s 512 -h sha256 -c aes-xts-plain64'
+
+  # Drop caches for swap issues
+  alias drop_caches "echo 3 | sudo /usr/bin/tee /proc/sys/vm/drop_caches"
+
+  # dump acpi temperature
+  alias gettemp 'printf "%02.2f\n" (cat /sys/class/thermal/thermal_zone0/temp)e-3'
+
+  # Get a decently readable df
+  alias dfh "df -h -x tmpfs -x devtmpfs -x squashfs -x fuse -x efivarfs"
+
+  # Battery details
+  alias bat-details 'upower -i (upower -e | grep battery)'
+
+  # Nvidia refresh rate
+  alias nvidia-refresh-rate 'nvidia-settings --display=:0 -q RefreshRate -t'
+
+  # to clipboard
+  alias toclip 'xclip -selection clipboard'
+else if test (uname) = "Darwin"
+  # Get a decently readable df
+  alias dfh "df -h"
+
+  # to clipboard
+  alias toclip 'pbcopy'
+end
 
 # On some systems, bat is batcat
 if not command -v bat >/dev/null 2>&1

dotfiles/config/fish/config.fish

@@ -34,4 +34,6 @@ end
 fish_add_path --move --path {$HOME}/bin
 if test (uname) = "Darwin"
     fish_add_path --move --path {$HOME}/bin/macos
+else if test (uname) = "Linux"
+    fish_add_path --move --path {$HOME}/bin/linux
 end

dotfiles/config/mise/config.toml

@@ -9,9 +9,8 @@ uv_venv_auto = true
 
 [tools]
 age = "latest"
-age-plugin-yubikey = "latest"
 usage = "latest"
-uv = "latest"
+uv = "0.11.8"
 
 [hooks]
 postinstall = "mise sync python --uv"

dotfiles/config/starship.toml

@@ -39,16 +39,3 @@ disabled = true
 [kubernetes]
 disabled = false
 detect_folders = ["k8s"]
-
-[custom.gemini_context]
-description = "Displays the current Gemini CLI context"
-when = "test -n \"$GEMINI_CLI_HOME\""
-command = """
-context_dir=\"${XDG_CONFIG_HOME:-$HOME/.config}/gemini\"
-if [[ \"$GEMINI_CLI_HOME\" == $context_dir/* ]]; then
-  basename \"$GEMINI_CLI_HOME\"
-fi
-"""
-style = "bold blue"
-format = "♊[$output](blue) "
-shell = ["/bin/sh", "-c"]

dotfiles/gitconfig

@@ -19,14 +19,17 @@
 [difftool]
   prompt = false
 
+[difftool "difftastic"]
+  cmd = difft "$LOCAL" "$REMOTE"
+
 [alias]
   st = status
   last = log -1 HEAD
   # Thanks to
   # http://durdn.com/blog/2012/11/22/must-have-git-aliases-advanced-examples/
-  logs = log --pretty=format:"%C(yellow)%h%Cred%d\\ %Creset%s%Cblue\\ [%cn]" --decorate
+  logs = log --pretty=format:"%C(yellow)%h%Cred%d %Creset%s%Cblue [%cn]" --decorate
   lg = log -p
-  ll = log --pretty=format:"%C(yellow)%h%Cred%d\\ %Creset%s%Cblue\\ [%cn]" --decorate --numstat
+  ll = log --pretty=format:"%C(yellow)%h%Cred%d %Creset%s%Cblue [%cn]" --decorate --numstat
   files = ls-files
   ls = ls-files
   lol = log --graph --pretty=format:'%C(yellow)%h%Creset %an: %s - %Creset %C(yellow)%d%Creset %Cblue(%cr)%Creset' --abbrev-commit --date=relative
@@ -92,8 +95,12 @@
   process = git-lfs filter-process
 
 [include]
+  path = ~/.gitconfig.d/aliases
   path = ~/.gitconfig.d/override
   path = ~/.gitconfig.d/local
 
-[includeIf "gitdir:~/personal/"]
+[includeIf "gitdir/i:~/personal/"]
   path = ~/.gitconfig.d/personal
+
+[rerere]
+  enabled = true

dotfiles/gitconfig.d/aliases

@@ -0,0 +1,9 @@
+[alias]
+commit-assumed = "!f() { \
+        file=\"$1\"; \
+        shift; \
+        git update-index --no-assume-unchanged \"$file\" && \
+        git add \"$file\" && \
+        git commit \"$@\" && \
+        git update-index --assume-unchanged \"$file\"; \
+    }; f"

dotfiles/gitignore

@@ -38,3 +38,4 @@ mise.local.toml
 .copilot/
 .cursor/
 .gemini/
+.jetskicli/

dotfiles/shenv

@@ -15,6 +15,7 @@ export DEBEMAIL="david@systemoverlord.com"
 export DEBFULLNAME="David Tomaschik"
 export LESS="-MR"
 export QUOTING_STYLE="literal"  # Coreutils quotes
+export HOMEBREW_NO_ENV_HINTS=1
 
 # Fix gnome-terminal
 if [ "$TERM" = "xterm" ] && [ "$COLORTERM" = "gnome-terminal" ] ; then
@@ -113,13 +114,17 @@ _is_link_path() {
 
 _CANDIDATE=""
 
-# 1. If current environment has a valid socket that is NOT our link, it's a prime candidate (e.g. SSH forwarding).
+# 1. If current environment has a valid socket that is NOT our link, it's a prime candidate
+# (e.g. fresh SSH login: sshd sets SSH_AUTH_SOCK to the raw forwarded socket before ssh/rc
+# rewrites it to the stable symlink; the shell inherits the original raw path).
 if [ -S "${SSH_AUTH_SOCK:-}" ] && ! _is_link_path "${SSH_AUTH_SOCK}"; then
   _CANDIDATE="${SSH_AUTH_SOCK}"
 fi
 
-# 2. If no candidate yet, or we're currently using the link, try to find the "real" system agent.
+# 2. Only look for a system agent if the stable link is already broken.  If the link is
-if [ -z "${_CANDIDATE}" ] || _is_link_path "${SSH_AUTH_SOCK:-}"; then
+# valid (e.g. a tmux pane where SSH_AUTH_SOCK points to our symlink which ssh/rc just
+# updated to the forwarded socket), leave it alone — don't clobber it with a local agent.
+if [ -z "${_CANDIDATE}" ] && [ ! -S "${_SSH_AUTH_LINK}" ]; then
   _FOUND=""
   if [ "$(uname)" = "Darwin" ]; then
     _FOUND=$(launchctl getenv SSH_AUTH_SOCK 2>/dev/null)
@@ -143,8 +148,8 @@ if [ -z "${_CANDIDATE}" ] || _is_link_path "${SSH_AUTH_SOCK:-}"; then
   fi
 fi
 
-# 3. Last resort: search common paths if we still don't have a valid candidate.
+# 3. Last resort: search common paths if we still don't have a candidate and the link is broken.
-if [ ! -S "${_CANDIDATE}" ]; then
+if [ ! -S "${_CANDIDATE}" ] && [ ! -S "${_SSH_AUTH_LINK}" ]; then
   _U=$(id -u)
   for _p in "/run/user/${_U}/keyring/ssh" "/run/user/${_U}/ssh-agent.socket" "/run/user/${_U}/openssh_agent" "/run/user/${_U}/gnupg/S.gpg-agent.ssh"; do
     if [ -S "${_p}" ] && ! _is_link_path "${_p}"; then
@@ -190,6 +195,8 @@ if [ "$(uname)" = "Darwin" ] ; then
   export XDG_RUNTIME_DIR="${XDG_RUNTIME_DIR:-$TMPDIR/runtime-$(id -u)}"
   export XDG_STATE_HOME="${XDG_STATE_HOME:-$HOME/.local/state}"
   export PATH="${HOME}/bin/macos:${PATH}"
+elif [ "$(uname)" = "Linux" ] ; then
+  export PATH="${HOME}/bin/linux:${PATH}"
 fi
 
 if test -e "$HOME/.localenv"; then

dotfiles/ssh/rc

@@ -2,19 +2,19 @@
 
 # Roughly based on this article:
 # https://werat.github.io/2017/02/04/tmux-ssh-agent-forwarding.html
+#
+# NOTE: this file is executed by sshd as a child process, NOT sourced by the
+# user's shell.  Any variable assignments or exports here have no effect on the
+# shell environment the user will land in.
 
 REMOTE_LINK="${HOME}/.ssh/ssh_auth_sock"
 
 if [ -S "${SSH_AUTH_SOCK}" ] ; then
-  SSH_REMOTE_AUTH_SOCK="${SSH_AUTH_SOCK}"
-  export SSH_REMOTE_AUTH_SOCK
   # Always update the symlink to the latest session's socket.
-  # This ensures that tmux (which uses the static path) always points to a 
+  # This ensures that tmux (which uses the static path) always points to a
   # current agent.
   mkdir -p "$(dirname "${REMOTE_LINK}")"
   ln -sf "${SSH_AUTH_SOCK}" "${REMOTE_LINK}"
-  SSH_AUTH_SOCK="${REMOTE_LINK}"
-  export SSH_AUTH_SOCK
 fi
 
 # if stdin is a tty, don't do the cookie step

dotfiles/tmux.conf

@@ -45,7 +45,7 @@ set -g window-status-current-style fg=colour235,bg=colour33,bold
 set -g status-interval 60
 set -g status-left-length 30
 set -g status-left '/#h: #S/ '
-set -g status-right '#{?pane_title,/#{pane_title}/ ,}#(cut -d " " -f 1-3 /proc/loadavg)#[default] #[fg=colour166]%H:%M#[default]'
+set -g status-right '#{?pane_title,/#{pane_title}/ ,}#(uptime | rev | cut -d":" -f1 | rev | sed s/,//g)#[default] #[fg=colour166]%H:%M#[default]'
 
 # Advanced mouse mode from http://tangledhelix.com/blog/2012/07/16/tmux-and-mouse-mode/
 # Toggle mouse on
@@ -65,8 +65,9 @@ bind M \
     display 'Mouse: OFF'
 
 # tmux X clipboard integration
-bind C-c run "tmux show-buffer | xsel -i -b"
+if-shell 'test "$(uname)" = "Darwin"' \
-bind C-v run "tmux set-buffer -- \"$(xsel -o -b)\"; tmux paste-buffer"
+  'bind C-c run "tmux show-buffer | pbcopy"; bind C-v run "tmux set-buffer -- \"$(pbpaste)\"; tmux paste-buffer"' \
+  'bind C-c run "tmux show-buffer | xsel -i -b"; bind C-v run "tmux set-buffer -- \"$(xsel -o -b)\"; tmux paste-buffer"'
 
 # List of plugins
 set -g @plugin 'tmux-plugins/tpm'

dotfiles/zshrc

@@ -59,6 +59,8 @@ DIRSTACKSIZE=16
 
 export OS="$(uname 2>/dev/null || echo "Unknown")"
 
+source ~/.commonrc.sh
+
 # Set terminal title
 case $TERM in
   # Only set the title for terminals that are likely to support it
@@ -163,28 +165,9 @@ bindkey '^r' history-incremental-search-backward
 # delete really deletes
 bindkey "^[[3~" delete-char
 
-source_if_existing() {
-  [[ -f "${1}" ]] && source "${1}"
-}
 
-source_first_existing() {
+path_prepend "${HOME}/.npm-packages/bin"
-  while (($#)); do
+path_prepend "${HOME}/.local/bin"
-    if test -e "${1}" ; then
-      source "${1}"
-      return
-    fi
-    shift
-  done
-  return 1
-}
-
-have_command() {
-  command -v "${1}" &>/dev/null
-}
-
-if test -d ${HOME}/.local/bin ; then
-  export PATH="${HOME}/.local/bin:${PATH}"
-fi
 
 # Source extras and aliases if interactive
 if [[ $- == *i* ]] ; then
@@ -270,8 +253,7 @@ if [[ $- == *i* ]] ; then
   if command -v direnv >/dev/null 2>&1 ; then
     eval "$(direnv hook zsh)"
   fi
-  test -e "${HOME}/.iterm2_shell_integration.zsh" && \
+  source_if_existing "${HOME}/.iterm2_shell_integration.zsh"
-    source "${HOME}/.iterm2_shell_integration.zsh" || true
   # mise, if installed
   command -v mise >/dev/null 2>&1 && eval "$(mise activate zsh)"
 
@@ -286,9 +268,11 @@ if [ -x /usr/bin/ack-grep ] ; then
 fi
 
 # I want these first always
-PATH="${HOME}/bin:${PATH}"
+path_prepend "${HOME}/bin"
 if [[ "$(uname)" == "Darwin" ]]; then
-  PATH="${HOME}/bin/macos:${PATH}"
+  path_prepend "${HOME}/bin/macos"
+elif [[ "$(uname)" == "Linux" ]]; then
+  path_prepend "${HOME}/bin/linux"
 fi
 
 # Load any local settings

dotfiles/zshrc.d/alert.zsh

@@ -18,8 +18,15 @@ alert() {
     icon="error"
   fi
   
-  # Send the notification with the executed command
+  if [ "$(uname)" = "Darwin" ]; then
-  notify-send --urgency=low -i "$icon" "Finished: '$@'"
+    # macOS notification
+    local title="Finished: '$*'"
+    local msg="Exit code: $ret"
+    osascript -e "display notification \"$msg\" with title \"$title\""
+  else
+    # Send the notification with the executed command
+    notify-send --urgency=low -i "$icon" "Finished: '$@'"
+  fi
   
   # Return the original exit code
   return $ret

dotfiles/zshrc.d/android.zsh

@@ -1,7 +1,12 @@
-ANDROID_HOME=$HOME/Library/Android/sdk
+if [ "$(uname)" = "Darwin" ]; then
+  ANDROID_HOME=$HOME/Library/Android/sdk
+else
+  ANDROID_HOME=$HOME/Android/Sdk
+fi
 
-if test -d $ANDROID_HOME ; then
+if test -d "${ANDROID_HOME}" ; then
-  PATH=$PATH:$ANDROID_HOME/emulator:$ANDROID_HOME/platform-tools
+  export ANDROID_HOME
+  PATH="${PATH}:${ANDROID_HOME}/emulator:${ANDROID_HOME}/platform-tools"
 else
   unset ANDROID_HOME
 fi

dotfiles/zshrc.d/assemble.zsh

@@ -6,7 +6,11 @@ if have_command nasm && have_command objdump ; then
     local TMPF=`mktemp`
     local bytes
     local byte
-    $NASM -f elf -o $TMPF $1
+    local format="elf"
+    if [[ "$OSTYPE" == darwin* ]]; then
+      format="macho64"
+    fi
+    $NASM -f $format -o $TMPF $1
     $OBJDUMP -M intel -d $TMPF | grep '^ ' | cut -f2 | while read -A bytes ; do
       for byte in $bytes ; do
         echo -n "\\\\x$byte"

dotfiles/zshrc.d/functions.zsh

@@ -1,26 +1,19 @@
 function dumpenv {
-  tr '\0' '\n' < /proc/${1}/environ
+  if [ "$(uname)" = "Linux" ]; then
+    tr '\0' '\n' < /proc/${1}/environ
+  elif [ "$(uname)" = "Darwin" ]; then
+    # macOS doesn't have /proc, use ps instead.
+    # Note: this may truncate if environment is very large.
+    ps -p ${1} -wwwe -o command= | tr ' ' '\n' | grep '='
+  fi
 }
 
-if test -x "/sbin/starship" ; then
+_STARSHIP_PATH="$(find_first "$(command -v starship)" /sbin/starship "${HOME}/tools/starship/starship" "${HOME}/.local/bin/starship" /usr/local/bin/starship)"
-  _STARSHIP_PATH="/sbin/starship"
+if test -n "$_STARSHIP_PATH" ; then
   function starship_prompt {
-    eval "$(/sbin/starship init zsh)"
+    eval "$($_STARSHIP_PATH init zsh)"
-  }
-elif test -x "${HOME}/tools/starship/starship" ; then
-  _STARSHIP_PATH="${HOME}/tools/starship/starship"
-  function starship_prompt {
-    eval "$($HOME/tools/starship/starship init zsh)"
   }
 fi
-if test -f ${HOME}/.zprompt ; then
-  if test "$(cat ${HOME}/.zprompt)" = "starship" ; then
-    if test -n "${_STARSHIP_PATH:-}" ; then
-      eval "$(${_STARSHIP_PATH} init zsh)"
-    fi
-  fi
-fi
-unset _STARSHIP_PATH
 
 function hashall {
   tee >(md5sum) | tee >(sha1sum) | sha256sum

dotfiles/zshrc.d/lesshighlight.zsh

@@ -1,8 +1,20 @@
-test -f /usr/share/source-highlight/src-hilite-lesspipe.sh && \
+# Find src-hilite-lesspipe.sh
+_SRCHILITE=""
+for _p in /usr/share/source-highlight/src-hilite-lesspipe.sh /opt/homebrew/bin/src-hilite-lesspipe.sh /usr/local/bin/src-hilite-lesspipe.sh ; do
+  if [ -f "$_p" ] ; then
+    _SRCHILITE="$_p"
+    break
+  fi
+done
+
+if [ -n "$_SRCHILITE" ] ; then
   function srcless {
     if [ $# -ne 1 ] ; then
-      echo "$0 <what>" > /dev/stderr
+      echo "Usage: srcless <file>" > /dev/stderr
       return 1
     fi
-    /usr/share/source-highlight/src-hilite-lesspipe.sh $1 | less -R
+    "$_SRCHILITE" "$1" | less -R
   }
+fi
+
+unset _SRCHILITE _p

dotfiles/zshrc.d/skelify.zsh

@@ -3,6 +3,17 @@
 # Skelify -- move a file to my .skel and setup symlinks
 
 function skelify {
+  local -A opts
+  zparseopts -D -A opts -overlay:
+
+  local overlay_name="${opts[--overlay]}"
+  local base_skel_dir="${HOME}/.skel/dotfiles"
+  local extra_args=()
+  if [[ -n "${overlay_name}" ]]; then
+    base_skel_dir="${HOME}/.skel/dotfile_overlays/${overlay_name}"
+    extra_args=(--overlay "${overlay_name}")
+  fi
+
   local target
   local whichdir
   local relhome
@@ -10,16 +21,19 @@ function skelify {
   local fulltarget
   for target in $~@; do
     if test -d ${target} ; then
-      skelify ${target}/* || return 1
+      skelify "${extra_args[@]}" ${target}/* || return 1
     elif test -f ${target} ; then
       if ! whichdir=$(cd $(dirname $target) && pwd); then
         echo Could not find directory for $target >/dev/stderr
         return 1
       fi
       fname=$(basename ${target})
-      relhome=${whichdir#${HOME}/}
       fulltarget="${whichdir}/${fname}"
-      if [[ ${relhome} == ${whichdir} ]] ; then
+      if [[ ${whichdir} == ${HOME} ]] ; then
+        relhome=""
+      elif [[ ${whichdir} == ${HOME}/* ]] ; then
+        relhome=${whichdir#${HOME}/}
+      else
         echo ${whichdir} is not in home >/dev/stderr
         return 1
       fi
@@ -32,7 +46,7 @@ function skelify {
         return 1
       fi
       echo ${target}
-      local skeldir="${HOME}/.skel/dotfiles/${relhome}"
+      local skeldir="${base_skel_dir}/${relhome}"
       mkdir -p "${skeldir}"
       mv ${target} "${skeldir}/${fname}"
       ln -s "${skeldir}/${fname}" "${fulltarget}"

dotfiles/zshrc.d/util.zsh

@@ -0,0 +1,56 @@
+# utility function to "open" a file
+o() {
+  if [[ "$OSTYPE" == "darwin"* ]]; then
+    open "$@"
+  elif [[ "$OSTYPE" == "linux-gnu"* ]]; then
+    xdg-open "$@"
+  else
+    echo "Unknown OS"
+  fi
+}
+
+# Copy from stdin to the system clipboard
+syscopy() {
+    if command -v pbcopy >/dev/null 2>&1; then
+        # macOS
+        pbcopy "$@"
+    elif command -v wl-copy >/dev/null 2>&1; then
+        # Linux Wayland
+        wl-copy "$@"
+    elif command -v xclip >/dev/null 2>&1; then
+        # Linux X11
+        xclip -selection clipboard "$@"
+    elif command -v xsel >/dev/null 2>&1; then
+        # Linux X11 (alternative)
+        xsel --clipboard --input "$@"
+    elif command -v clip.exe >/dev/null 2>&1; then
+        # Windows WSL
+        clip.exe "$@"
+    else
+        echo "Error: No clipboard utility found. Please install pbcopy, wl-copy, xclip, or xsel." >&2
+        return 1
+    fi
+}
+
+# Paste from the system clipboard to stdout
+syspaste() {
+    if command -v pbpaste >/dev/null 2>&1; then
+        # macOS
+        pbpaste "$@"
+    elif command -v wl-paste >/dev/null 2>&1; then
+        # Linux Wayland
+        wl-paste "$@"
+    elif command -v xclip >/dev/null 2>&1; then
+        # Linux X11
+        xclip -selection clipboard -o "$@"
+    elif command -v xsel >/dev/null 2>&1; then
+        # Linux X11 (alternative)
+        xsel --clipboard --output "$@"
+    elif command -v powershell.exe >/dev/null 2>&1; then
+        # Windows WSL
+        powershell.exe -noprofile -command Get-Clipboard "$@"
+    else
+        echo "Error: No clipboard utility found. Please install pbpaste, wl-paste, xclip, or xsel." >&2
+        return 1
+    fi
+}

install.sh

@@ -7,14 +7,65 @@ set -o errexit
 set -o shwordsplit 2>/dev/null || true  # Make zsh behave like bash
 
 HOME=${HOME:-$(cd ~ && pwd)}
+LOCAL_BIN="${HOME}/.local/bin"
+STARSHIP_INSTALL_HASH="52c64f14a558034ebeb1907ea9364e802b32474576fd3e68265f73bc33cc8fbb"
 
+# 1. Get the raw script path (handles Bash vs Zsh)
+TARGET="${BASH_SOURCE[0]}"
 
+# 2. Loop to resolve symlinks completely
+while [ -L "$TARGET" ]; do
+  DIR=$(cd -P "$(dirname -- "$TARGET")" &>/dev/null && pwd)
+  TARGET=$(readlink "$TARGET")
+  # If $TARGET is a relative symlink, resolve it relative to the symlink's directory
+  [[ $TARGET != /* ]] && TARGET="$DIR/$TARGET"
+done
+
+# 3. Get the final absolute directory
+SCRIPT_DIR="$(cd -P "$(dirname -- "$TARGET")" &>/dev/null && pwd)"
 
 have_command() {
   command -v "${1}" >/dev/null 2>&1
 }
 
+raw_sha256sum() {
+  local file="${1}"
+  if [[ -z "${file}" ]]; then
+    echo "Error: No file specified" >&2
+    return 1
+  fi
+  if [[ ! -f "${file}" ]]; then
+    echo "Error: File not found: ${file}" >&2
+    return 1
+  fi
 
+  if have_command sha256sum ; then
+    sha256sum "${file}" | awk '{print $1}'
+  elif have_command shasum ; then
+    shasum -a 256 "${file}" | awk '{print $1}'
+  else
+    echo "Error: Neither sha256sum nor shasum is available" >&2
+    return 1
+  fi
+}
+
+sudo_group() {
+  if [[ "$(id -u)" -eq 0 ]] ; then
+    return 0
+  fi
+  have_command sudo && ( id -Gn | grep -q '\bsudo\b' )
+}
+
+maybe_sudo() {
+  if [[ "$(id -u)" -eq 0 ]] ; then
+    "$@"
+    return
+  fi
+  if ! have_command sudo ; then
+    return 1
+  fi
+  sudo "$@"
+}
 
 link_directory_contents() {
   local SRCDIR="${1}"
@@ -43,7 +94,7 @@ ssh_key_already_installed() {
   fi
   # Extract the key data (field 2) from the key file, ignoring comments
   local key_data
-  key_data=$(awk '/^ssh-/ {print $2}' "$1")
+  key_data=$(awk '/^(ssh|ecdsa|sk)-/ {print $2}' "$1")
   if [[ -z "${key_data}" ]]; then
     # Not a valid key file
     return 1
@@ -90,7 +141,7 @@ install_known_hosts() {
   verbose 'Installing known hosts...' >&2
   local skel_hosts="${BASEDIR}/keys/known_hosts"
   local user_hosts="${HOME}/.ssh/known_hosts"
-  local merge_script="${BASEDIR}/skeltools/merge_authorized_keys"
+  local merge_script="${BASEDIR}/skeltools/merge_known_hosts"
 
   if [[ ! -f "${skel_hosts}" ]]; then
     return 0
@@ -176,6 +227,60 @@ install_dotfiles() {
   fi
 }
 
+install_starship() {
+  if have_command starship ; then return 0 ; fi
+
+  if have_command brew ; then
+    verbose "Attempting to install Starship via Homebrew..."
+    if brew install starship ; then
+      return 0
+    fi
+    echo "brew install starship failed, trying other methods..." >&2
+  fi
+
+  if have_command apt-get && sudo_group ; then
+    if maybe_sudo apt-get install -qy starship ; then
+      return 0
+    fi
+    echo "apt-get install starship failed, installing locally" >&2
+  fi
+  local tmpd
+  tmpd="$(mktemp -d tmp.starship.XXXXXX)" || return 1
+  trap '[[ -n "${tmpd}" && -d "${tmpd}" ]] && rm -rf "${tmpd}"' EXIT
+
+  local install_path="${tmpd}/install.sh"
+  if have_command curl ; then
+    curl -sSL --show-error -o "${install_path}" https://starship.rs/install.sh
+  elif have_command wget ; then
+    wget -q -O "${install_path}" --https-only https://starship.rs/install.sh
+  else
+    echo "No curl or wget available!!" >&2
+    rm -rf "${tmpd}"
+    trap - EXIT
+    return 1
+  fi
+  local dl_hash
+  dl_hash="$(raw_sha256sum "${install_path}")"
+  if [[ "$dl_hash" != "${STARSHIP_INSTALL_HASH}" ]] ; then
+    echo "Hash check failed!!" >&2
+    echo "Expected: ${STARSHIP_INSTALL_HASH}, got ${dl_hash} on ${install_path}" >&2
+    rm -rf "${tmpd}"
+    trap - EXIT
+    return 1
+  fi
+  if sudo_group ; then
+    if maybe_sudo sh "${install_path}" ; then
+      rm -rf "${tmpd}"
+      trap - EXIT
+      return 0
+    fi
+    echo "root installation failed, falling back to user-local" >&2
+  fi
+  sh "${install_path}" -b "${LOCAL_BIN}"
+  rm -rf "${tmpd}"
+  trap - EXIT
+}
+
 install_main() {
   if [[ -d "${BASEDIR}/.git" ]] && have_command git ; then
     if [[ -z "$(git -C "${BASEDIR}" status --porcelain)" ]]; then
@@ -185,6 +290,8 @@ install_main() {
     fi
   fi
   [[ "$MINIMAL" = 1 ]] || {
+    mkdir -p "${LOCAL_BIN}"
+    install_starship
 
     # Install vim-plug if not already present
     local VIM_PLUG_URL="https://raw.githubusercontent.com/junegunn/vim-plug/master/plug.vim"
@@ -199,22 +306,22 @@ install_main() {
       else
         echo "Error: curl not found. Cannot install vim-plug." >&2
       fi
-        fi
+    fi
 
-        # Install TPM (Tmux Plugin Manager) if not already present
+    # Install TPM (Tmux Plugin Manager) if not already present
-        local TPM_DIR="${HOME}/.tmux/plugins/tpm"
+    local TPM_DIR="${HOME}/.tmux/plugins/tpm"
-        local TPM_REPO="https://github.com/tmux-plugins/tpm"
+    local TPM_REPO="https://github.com/tmux-plugins/tpm"
 
-        if [[ ! -d "${TPM_DIR}" ]]; then
+    if [[ ! -d "${TPM_DIR}" ]]; then
-          verbose "Installing TPM (Tmux Plugin Manager)..."
+      verbose "Installing TPM (Tmux Plugin Manager)..."
-          if have_command git; then
+      if have_command git; then
-            git clone --depth 1 "${TPM_REPO}" "${TPM_DIR}"
+        git clone --depth 1 "${TPM_REPO}" "${TPM_DIR}"
-          else
+      else
-            echo "Error: git not found. Cannot install TPM." >&2
+        echo "Error: git not found. Cannot install TPM." >&2
-          fi
+      fi
-        fi
+    fi
 
-        # try to update dotfile overlays
+    # try to update dotfile overlays
     if [[ -d "${BASEDIR}/dotfile_overlays" ]] ; then
       for dotfiledir in "${BASEDIR}/dotfile_overlays/"* ; do
         if [[ -d "${dotfiledir}/.git" ]] ; then
@@ -243,7 +350,7 @@ read_saved_prefs
 
 # Defaults if not passed in or saved.
 # TODO: use flags instead of environment variables.
-: ${BASEDIR:=$HOME/.skel}
+: ${BASEDIR:=${SCRIPT_DIR}}
 : ${MINIMAL:=0}
 : ${INSTALL_KEYS:=1}
 : ${TRUST_ALL_KEYS:=0}