diff --git a/commands/tri-review.md b/commands/tri-review.md
index 9582890..b34c9a9 100644
--- a/commands/tri-review.md
+++ b/commands/tri-review.md
@@ -113,7 +113,7 @@ Retrieve result with `/codex:result` when done. Omit `--model` to use the accoun
 
 ```bash
 if [ "$HAS_CODEX_CLI" = "yes" ]; then
-  codex exec --full-auto "{prompt} $(cat /tmp/tri-review-diff.txt)" \
+  cat /tmp/tri-review-diff.txt | codex exec --full-auto "{prompt}" \
     > /tmp/tri-review-codex.txt 2>&1 &
   CODEX_PID=$!
 fi
@@ -134,7 +134,7 @@ Retrieve result with `/gemini:result` when done. Omit `--model` to use the accou
 
 ```bash
 if [ "$HAS_GEMINI_CLI" = "yes" ]; then
-  gemini -p "{prompt} $(cat /tmp/tri-review-diff.txt)" \
+  cat /tmp/tri-review-diff.txt | gemini -p "{prompt}" \
     -y --output-format text \
     > /tmp/tri-review-gemini.txt 2>&1 &
   GEMINI_PID=$!
diff --git a/commands/tri-security.md b/commands/tri-security.md
index 34eac78..41929a3 100644
--- a/commands/tri-security.md
+++ b/commands/tri-security.md
@@ -122,7 +122,7 @@ Retrieve result with `/gemini:result` when done. Omit `--model` to use the accou
 
 ```bash
 if [ "$HAS_GEMINI_CLI" = "yes" ]; then
-  gemini -p "{prompt} $(cat /tmp/tri-security-diff.txt)" -y \
+  cat /tmp/tri-security-diff.txt | gemini -p "{prompt}" -y \
     --output-format text > /tmp/tri-security-gemini.txt 2>&1 &
 fi