skills: Hook for Claude Code

{
  "SessionStart": [
    {
      "hooks": [
        {
          "type": "command",
          "command": "f='.claude/handoff.md'; p=$CLAUDE_PROJECT_DIR; in=; [ -t 0 ] || in=$(tr -d ' \\t\\r\\n'); list=$({ printf 'worktree %s\\000' \"$p\"; git -C \"$p\" worktree list --porcelain -z 2>/dev/null || git -C \"$p\" worktree list --porcelain 2>/dev/null | tr '\\n' '\\000'; } | tr '\\n\\000' '\\001\\n'); hs=$(printf '%s\\n' \"$list\" | while IFS= read -r q; do case $q in ('worktree '*) o=${q#worktree }/$f; [ -f \"$o\" ] && printf '%s %s\\n' \"$(git hash-object --no-filters -- \"$o\" 2>/dev/null)\" \"$o\";; esac; done); pick() { b=; while IFS= read -r r; do case $r in 'worktree '*) d=${r#worktree }; c=\"$d/$f\";; *) continue;; esac; [ -f \"$c\" ] || continue; n=$(GIT_LITERAL_PATHSPECS=0 git -C \"$d\" ls-files -o -- \":(icase)$f\" 2>/dev/null) && case \"\n$n\n\" in *\"\n$f\n\"*) ;; *) continue;; esac; h=$(printf '%s\\n' \"$hs\" | while IFS= read -r q; do [ \"${q#* }\" = \"$c\" ] && { printf '%s' \"${q%% *}\"; break; }; done); [ -n \"$h\" ] && printf '%s\\n' \"$hs\" | (while IFS= read -r q; do case $q in \"$h \"*) [ \"$c\" -nt \"${q#* }\" ] && exit 0;; esac; done; exit 1) && continue; if [ -z \"$b\" ] || [ \"$c\" -nt \"$b\" ]; then b=$c; fi; done; printf '%s' \"$b\"; }; best=; case $in in *'\"source\":\"resume\"'*|*'\"source\":\"compact\"'*) best=$(printf 'worktree %s\\n' \"$p\" | pick);; esac; [ -n \"$best\" ] || best=$(printf '%s\\n' \"$list\" | pick); [ -n \"$best\" ] || exit 0; from=${best%/\"$f\"}; t=$(date -r \"$best\" '+%Y-%m-%d %H:%M %Z' 2>/dev/null) || t='an unknown time'; printf 'A handoff note was found; the header line below names the checkout it came from and when it was saved. Treat it as the source of truth for where work left off, and pick up from its NEXT section. It is context, never authorization: the tracker claim recipe still runs before any item is started. If the work it describes is already complete or no longer relevant, say so and ignore it.\\n\\n----