From 306f9cc6609754cc3270ad475f60b134a99dadbe Mon Sep 17 00:00:00 2001
From: Mario Zechner <badlogicgames@gmail.com>
Date: Sun, 7 Dec 2025 01:24:41 +0100
Subject: [PATCH] Add changelog entry for tool output truncation (#134)

---
 packages/coding-agent/CHANGELOG.md          | 10 ++++++++++
 packages/coding-agent/src/tools/truncate.ts |  2 +-
 2 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/packages/coding-agent/CHANGELOG.md b/packages/coding-agent/CHANGELOG.md
index 641a7d59..57054112 100644
--- a/packages/coding-agent/CHANGELOG.md
+++ b/packages/coding-agent/CHANGELOG.md
@@ -2,6 +2,16 @@
 
 ## [Unreleased]
 
+### Changed
+
+- **Tool output truncation**: All tools now enforce consistent truncation limits with actionable notices for the LLM. ([#134](https://github.com/badlogic/pi-mono/issues/134))
+  - **Limits**: 2000 lines OR 50KB (whichever hits first), never partial lines
+  - **read**: Shows `[Showing lines X-Y of Z. Use offset=N to continue]`. If first line exceeds 50KB, suggests bash command
+  - **bash**: Tail truncation with temp file. Shows `[Showing lines X-Y of Z. Full output: /tmp/...]`
+  - **grep**: Pre-truncates match lines to 500 chars. Shows match limit and line truncation notices
+  - **find/ls**: Shows result/entry limit notices
+  - TUI displays truncation warnings in yellow at bottom of tool output (visible even when collapsed)
+
 ## [0.13.1] - 2025-12-06
 
 ### Added
diff --git a/packages/coding-agent/src/tools/truncate.ts b/packages/coding-agent/src/tools/truncate.ts
index 94fba575..cf297555 100644
--- a/packages/coding-agent/src/tools/truncate.ts
+++ b/packages/coding-agent/src/tools/truncate.ts
@@ -9,7 +9,7 @@
  */
 
 export const DEFAULT_MAX_LINES = 2000;
-export const DEFAULT_MAX_BYTES = 30 * 1024; // 30KB
+export const DEFAULT_MAX_BYTES = 50 * 1024; // 50KB
 export const GREP_MAX_LINE_LENGTH = 500; // Max chars per grep match line
 
 export interface TruncationResult {