fix: bash memory usage (#22660)

packages/opencode/src/tool/truncate.ts

@@ -33,6 +33,7 @@ export namespace Truncate {
 
   export interface Interface {
     readonly cleanup: () => Effect.Effect<void>
+    readonly write: (text: string) => Effect.Effect<string>
     /**
      * Returns output unchanged when it fits within the limits, otherwise writes the full text
      * to the truncation directory and returns a preview plus a hint to inspect the saved file.
@@ -61,6 +62,13 @@ export namespace Truncate {
         }
       })
 
+      const write = Effect.fn("Truncate.write")(function* (text: string) {
+        const file = path.join(TRUNCATION_DIR, ToolID.ascending())
+        yield* fs.ensureDir(TRUNCATION_DIR).pipe(Effect.orDie)
+        yield* fs.writeFileString(file, text).pipe(Effect.orDie)
+        return file
+      })
+
       const output = Effect.fn("Truncate.output")(function* (text: string, options: Options = {}, agent?: Agent.Info) {
         const maxLines = options.maxLines ?? MAX_LINES
         const maxBytes = options.maxBytes ?? MAX_BYTES
@@ -102,10 +110,7 @@ export namespace Truncate {
         const removed = hitBytes ? totalBytes - bytes : lines.length - out.length
         const unit = hitBytes ? "bytes" : "lines"
         const preview = out.join("\n")
-        const file = path.join(TRUNCATION_DIR, ToolID.ascending())
-
-        yield* fs.ensureDir(TRUNCATION_DIR).pipe(Effect.orDie)
-        yield* fs.writeFileString(file, text).pipe(Effect.orDie)
+        const file = yield* write(text)
 
         const hint = hasTaskTool(agent)
           ? `The tool call succeeded but the output was truncated. Full output saved to: ${file}\nUse the Task tool to have explore agent process this file with Grep and Read (with offset/limit). Do NOT read the full file yourself - delegate to save context.`
@@ -131,7 +136,7 @@ export namespace Truncate {
         Effect.forkScoped,
       )
 
-      return Service.of({ cleanup, output })
+      return Service.of({ cleanup, write, output })
     }),
   )