diff --git a/src/Bot/Claude.hs b/src/Bot/Claude.hs
index df93643..959329a 100644
--- a/src/Bot/Claude.hs
+++ b/src/Bot/Claude.hs
@@ -11,10 +11,7 @@ import Data.ByteString.Lazy qualified as BL
 import Data.Text (Text)
 import Data.Text qualified as T
 import Data.Text.Encoding qualified as TE
-import Data.Text.IO qualified as TIO
-import System.Directory (getTemporaryDirectory, removeFile)
 import System.Exit (ExitCode (..))
-import System.FilePath ((</>))
 import System.Process (readProcessWithExitCode)
 
 data ReviewOutput = ReviewOutput
@@ -68,20 +65,12 @@ reviewJsonSchema = unlines
 
 invokeClaudeReview :: Text -> IO (Either String ReviewOutput)
 invokeClaudeReview prompt = do
-  tmpDir <- getTemporaryDirectory
-  let promptFile = tmpDir </> "claude-review-prompt.txt"
-      schemaFile = tmpDir </> "claude-review-schema.json"
-  TIO.writeFile promptFile prompt
-  writeFile schemaFile reviewJsonSchema
   (exitCode, stdout, stderr_) <- readProcessWithExitCode "claude"
-    [ "-p"
+    [ "-p", T.unpack prompt
     , "--output-format", "json"
     , "--max-turns", "1"
-    , "--prompt-file", promptFile
-    , "--json-schema", schemaFile
+    , "--json-schema", reviewJsonSchema
     ] ""
-  removeFile promptFile
-  removeFile schemaFile
   case exitCode of
     ExitSuccess -> pure $ parseClaudeJsonOutput stdout
     ExitFailure code ->
@@ -89,16 +78,11 @@ invokeClaudeReview prompt = do
 
 invokeClaudeReply :: Text -> IO (Either String Text)
 invokeClaudeReply prompt = do
-  tmpDir <- getTemporaryDirectory
-  let promptFile = tmpDir </> "claude-reply-prompt.txt"
-  TIO.writeFile promptFile prompt
   (exitCode, stdout, stderr_) <- readProcessWithExitCode "claude"
-    [ "-p"
+    [ "-p", T.unpack prompt
     , "--output-format", "json"
     , "--max-turns", "1"
-    , "--prompt-file", promptFile
     ] ""
-  removeFile promptFile
   case exitCode of
     ExitSuccess -> pure $ parseClaudeTextOutput stdout
     ExitFailure code ->