fix: tool bugs found in review audit

repl:  env var was dead code (hardcoded 2s), empty frame gave misleading error
check-tangle: show full SBCL output on compile failure, not filtered
verify-repl: blacklist now configurable via VERIFY_REPL_EXCLUDE env var;
  regex tightened to ';; +REPL-VERIFIED:' from ';;.REPL.VERIFIED:' (ambiguous)
org-eval: 1-based indexing to match repl-block; errors on out-of-range; errors on <1

projects/org-eval-tool/org-eval

@@ -1,14 +1,16 @@
 #!/usr/bin/env bash
 # Evaluate an org src block using Emacs batch mode
 # Usage: org-eval <org-file> [block-index]
-# If block-index is not provided, evaluates all blocks
+#   block-index is 1-based (first block = 1).
+#   If omitted, evaluates ALL blocks.
 
 set -e
 
 if [ $# -lt 1 ]; then
     echo "Usage: org-eval <org-file> [block-index]"
     echo "  Evaluates src blocks in the org file"
-    echo "  If block-index is omitted, evaluates ALL blocks"
+    echo "  block-index is 1-based (first block = 1)"
+    echo "  If omitted, evaluates ALL blocks"
     exit 1
 fi
 
@@ -23,15 +25,23 @@ fi
 echo "Evaluating: $ORG_FILE"
 
 if [ -n "$BLOCK_INDEX" ]; then
+    # 1-based indexing: subtract 1 for Emacs' dotimes (0-based)
+    if [ "$BLOCK_INDEX" -lt 1 ]; then
+        echo "Error: block-index must be 1 or greater" >&2
+        exit 1
+    fi
+    SKIP=$((BLOCK_INDEX - 1))
     # Evaluate specific block
     emacs --batch \
         --load org \
         --eval "(setq org-confirm-babel-evaluate nil)" \
         --eval "(with-current-buffer (find-file-noselect \"$ORG_FILE\") \
                  (goto-char (point-min)) \
-                 (dotimes (_ $BLOCK_INDEX) \
+                 (dotimes (_ $SKIP) \
                    (org-babel-next-src-block)) \
-                 (org-babel-execute-src-block))"
+                 (if (org-in-src-block-p t) \
+                     (org-babel-execute-src-block) \
+                   (error \"Block $BLOCK_INDEX not found\")))"
 else
     # Evaluate all blocks
     emacs --batch \