Expose --kind on ai_query so definitional questions can reach the prose

The index already stored chunk origin and search.js already filtered on it;
only the wrapper refused the flag. Intent routing boosts PURPOSE for "what
is X", which buried README.md and made the system answer that it had no
definition of itself.

AI/README-AI.md

@@ -59,6 +59,20 @@ Applied as a **score boost, not a filter**. Intent detection is a heuristic, and
 must never be able to exclude the one chunk that holds the answer. `--section=NAME` forces a
 hard filter when you actually want one.
 
+The boost still has a blind spot worth knowing about: **definitional questions.** "What is
+Varaverk?" matches the `PURPOSE` intent, so every script's one-line PURPOSE gets boosted above
+the top-level prose that actually answers it — and the model correctly replies that the context
+does not define the system. The corpus is fine; `README.md` is indexed. The routing simply
+buries it. `--kind=readme` is the hard filter for that case:
+
+```bash
+bash AI/ai_query.sh --kind=readme "what is Varaverk"
+```
+
+`--kind` filters on where a chunk came from — `header`, `readme`, `manual`, `template`, `doc` —
+and composes with `--section`. Prefer it over `--section` for "what is" and "why does this
+exist" questions, where the answer is narrative rather than a header field.
+
 ---
 
 ## ━━━ NAMED-PARAGRAPH SUB-CHUNKING ━━━
@@ -154,6 +168,7 @@ bash AI/ai_index.sh --status         # size, counts, last build
 bash AI/ai_query.sh "what stops rsync and the mover running at once"
 bash AI/ai_query.sh --search "why are the cache writers lockless"
 bash AI/ai_query.sh --section=CONFIGURATION "which variable sets the mover grace period"
+bash AI/ai_query.sh --kind=readme "what is Varaverk"          # definitional / narrative
 bash AI/ai_query.sh --json "..."     # for other scripts
 ```
 

AI/ai_query.sh

@@ -104,6 +104,12 @@
 # ai_query.sh --section=CONFIGURATION "your question"
 #     Restrict retrieval to one header section.
 #
+# ai_query.sh --kind=readme "what is Varaverk"
+#     Restrict retrieval to one chunk origin: header, readme, manual, template, doc.
+#     Use this for definitional and narrative questions. Intent routing boosts header
+#     sections such as PURPOSE, which answers "what does this script do" well but buries
+#     the top-level prose that explains what the system *is*. --kind=readme reaches it.
+#
 # ai_query.sh --json "your question"
 #     Machine-readable output for other scripts.
 #
@@ -119,18 +125,32 @@ source "${SCRIPT_DIR}/../load_config.sh"
 
 detect_hosts
 
-SEARCH_ONLY=false; JSON=false; STATUS=false; SECTION=""; QUERY=""
+SEARCH_ONLY=false; JSON=false; STATUS=false; SECTION=""; KIND=""; QUERY=""
 for arg in "$@"; do
     case "$arg" in
         --search)     SEARCH_ONLY=true ;;
         --json)       JSON=true ;;
         --status)     STATUS=true ;;
         --section=*)  SECTION="${arg#*=}" ;;
+        --kind=*)     KIND="${arg#*=}" ;;
         --*)          echo "Unknown option: $arg" >&2; exit 1 ;;
         *)            QUERY="$arg" ;;
     esac
 done
 
+# --kind is a hard filter on chunk origin; --section filters the header section within a
+# chunk. They answer different questions and compose: --kind=readme --section=PURPOSE is
+# meaningful. Validated here rather than in the CLI so a typo costs nothing — an unknown kind
+# silently matches no rows, which reads as "the index has no answer" and is the most
+# misleading failure this tool can produce.
+if [[ -n "$KIND" ]]; then
+    case "$KIND" in
+        header|readme|manual|template|doc) ;;
+        *) echo "Unknown --kind=$KIND (expected: header, readme, manual, template, doc)" >&2
+           exit 1 ;;
+    esac
+fi
+
 CLI="${SCRIPT_DIR}/lib/cli.js"
 DB="${AI_INDEX_DB:-${DATA_DIR}/ai_index.db}"
 
@@ -156,7 +176,7 @@ if [[ "${AI_ENABLED:-false}" != "true" ]]; then
     exit 0
 fi
 
-[[ -z "$QUERY" ]] && { echo "usage: ai_query.sh [--search] [--section=NAME] \"your question\"" >&2; exit 1; }
+[[ -z "$QUERY" ]] && { echo "usage: ai_query.sh [--search] [--section=NAME] [--kind=KIND] \"your question\"" >&2; exit 1; }
 [[ -f "$DB" ]]   || { error "No index at $DB — run AI/ai_index.sh first"; exit 1; }
 [[ -f "$CLI" ]]  || { error "missing $CLI"; exit 1; }
 command -v node >/dev/null 2>&1 || { error "node not found"; exit 1; }
@@ -169,6 +189,7 @@ fi
 
 _args=("--db=${DB}" "--url=${OLLAMA_URL}" "--query=${QUERY}")
 [[ -n "$SECTION" ]] && _args+=("--section=${SECTION}")
+[[ -n "$KIND"    ]] && _args+=("--kind=${KIND}")
 [[ "$JSON" == true ]] && _args+=(--json)
 
 if [[ "$SEARCH_ONLY" == true ]]; then