aix: update to .ai/ layout; filter candidates to template projects

Two changes:
- AI_INSTRUCTIONS now points at .ai/protocols.org (was docs/) — aligns
  with the template docs/ → .ai/ restructure
- build_candidates filters directories to those with .ai/protocols.org
  present. Previously listed every dir under ~/code/ and ~/projects/
  including third-party clones and non-template projects, which would
  fail silently when Claude tried to read a missing protocols file.

New projects that haven't been initialized (no .ai/ yet) will not
appear in the fzf list. Bootstrap those with a direct claude
invocation; the first-session workflow takes over once .ai/ exists.

1 files changed, 11 insertions, 4 deletions

diff --git a/dotfiles/common/.local/bin/aix b/dotfiles/common/.local/bin/aix
index ad40d84..6f94cfb 100755
--- a/dotfiles/common/.local/bin/aix
+++ b/dotfiles/common/.local/bin/aix
@@ -22,7 +22,7 @@ done
 
 # Claude command — separated for safe editing
 AI_CMD="claude"
-AI_INSTRUCTIONS='Read docs/protocols.org and follow all instructions.'
+AI_INSTRUCTIONS='Read .ai/protocols.org and follow all instructions.'
 
 # Create a window in the session and launch claude; prints window ID
 create_window() {
@@ -41,18 +41,25 @@ read_selections() {
   done <<<"$1"
 }
 
+# Add a directory to candidates only if it's a Claude-template project
+# (has .ai/protocols.org). New projects need manual setup outside aix.
+maybe_add_candidate() {
+  local dir="$1"
+  [ -f "$dir/.ai/protocols.org" ] && candidates+=("~/${dir#"$HOME"/}")
+}
+
 # Build candidate directory list
 build_candidates() {
   candidates=()
-  [ -d "$HOME/.emacs.d" ] && candidates+=("~/.emacs.d")
+  maybe_add_candidate "$HOME/.emacs.d"
   if [ -d "$HOME/code" ]; then
     while IFS= read -r d; do
-      candidates+=("~/${d#"$HOME"/}")
+      maybe_add_candidate "$d"
     done < <(find "$HOME/code" -maxdepth 1 -mindepth 1 -type d | sort)
   fi
   if [ -d "$HOME/projects" ]; then
     while IFS= read -r d; do
-      candidates+=("~/${d#"$HOME"/}")
+      maybe_add_candidate "$d"
     done < <(find "$HOME/projects" -maxdepth 1 -mindepth 1 -type d | sort)
   fi
 }