claude-code - 💡(How to fix) Fix Duplicate console output across multiple independent projects (macOS) [1 participants]

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anthropics/claude-code#52818Fetched 2026-04-25 06:20:06
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Seeing duplicate/repeated console output when using the Claude Code CLI. This affects multiple independent projects on the same machine (not isolated to a single project's configuration), which points to a platform-level regression rather than a project-specific hook or settings issue.

Root Cause

Console output is duplicated/repeated during Claude Code CLI sessions. The duplication appears consistently across different projects, confirming it is not caused by per-project hooks, settings.json configuration, or CLAUDE_CODE_NO_FLICKER.

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Description

Seeing duplicate/repeated console output when using the Claude Code CLI. This affects multiple independent projects on the same machine (not isolated to a single project's configuration), which points to a platform-level regression rather than a project-specific hook or settings issue.

Environment

  • OS: macOS (Darwin 25.3.0)
  • Claude Code version: 2.1.119
  • Affected projects: Multiple independent projects (cross-project, not config-specific)
  • CLAUDE_CODE_NO_FLICKER set: No — already ruled out as the cause

Symptom

Console output is duplicated/repeated during Claude Code CLI sessions. The duplication appears consistently across different projects, confirming it is not caused by per-project hooks, settings.json configuration, or CLAUDE_CODE_NO_FLICKER.

Related Issues

This issue is filed to add volume signal to the existing tracker. Related open issues:

  • #46597 — Duplicate banner + repeated messages in a single session (v2.1.101, macOS)
  • #50689 — Duplicated lines in file generation (Opus 4.7, Apr 2026)
  • #42703 — CLAUDE_CODE_NO_FLICKER causes duplicated output (Windows)

The cross-project nature of this report (same behavior on macOS across independent workspaces with different configs) suggests a platform-level regression affecting multiple users.

extent analysis

TL;DR

The issue of duplicate console output in the Claude Code CLI on macOS may be related to a platform-level regression and could potentially be addressed by investigating or waiting for fixes related to existing issues #46597, #50689, or #42703.

Guidance

  • Investigate the existing related issues (#46597, #50689, #42703) to see if any fixes or workarounds have been suggested or implemented that could apply to this scenario.
  • Consider testing the Claude Code CLI on a different OS or environment to isolate if the issue is indeed macOS-specific.
  • Review the configuration and settings across the multiple projects to ensure there's no common, overlooked setting causing the duplication, despite the issue seeming cross-project.
  • Look for any updates to the Claude Code CLI that may address platform-level regressions, especially those affecting macOS.

Example

No specific code snippet can be provided without more details on the project configurations or the exact commands used in the Claude Code CLI sessions.

Notes

The solution may depend on the specifics of the Claude Code CLI version 2.1.119 and the macOS version (Darwin 25.3.0), as well as any updates or patches released for these platforms.

Recommendation

Apply workaround: Given the cross-project nature and the relation to known issues, waiting for or applying fixes related to #46597, #50689, or #42703 might be the most straightforward path forward, assuming no immediate configuration fix is apparent.

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claude-code - 💡(How to fix) Fix Duplicate console output across multiple independent projects (macOS) [1 participants]