"Only you see that command's output" caveat is repeated once per tool result in a batch

**What happened**
In batches of six to twelve Bash calls the same caveat sentence was appended six to twelve times in a row, and again once per Read of a persisted output. It adds context tokens without new information.

**Expected**
Once per batch.

**Repro**
Run several Bash calls in one message.

**Environment:** Claude Code CLI 2.1.270 (Claude Code), macOS, auto mode, model claude-fable-5-1, session of 2026-09-14.

Start by reproducing the issue in the Claude Code CLI with several Bash calls in one message, then inspect where tool results and persisted-output Reads receive the caveat. Verify the batching boundary and ensure the caveat appears once per batch rather than once per result; repeat the repro with six to twelve calls and persisted output to confirm the fix.

Written by the indexing model from the issue text.