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Claude Code agent bypasses URL-opening hook, opens pages in wrong browser profile

By PulseAugur Editorial · [1 sources] ·

A developer encountered an issue with their Claude Code agent on macOS where the `open` command, intended to open URLs in a specific browser profile, failed to do so correctly. The agent's `PreToolUse` hook, designed to prevent incorrect URL openings, was bypassed by a `for` loop construct that expanded the URL variable only after the hook had already evaluated the command. This resulted in nine pages opening in the wrong browser profile, a recurring problem that had been addressed previously with a wrapper script and updated instructions. AI

IMPACT Highlights the challenges of ensuring AI agents adhere to specific operational constraints and follow instructions precisely.

RANK_REASON The item describes a specific bug and workaround related to an AI agent's tool usage, not a new release or major industry event.

Read on dev.to — Claude Code tag →

AI-generated summary · Google Gemini · from 1 sources. How we write summaries →

Claude Code agent bypasses URL-opening hook, opens pages in wrong browser profile

How we ranked this

Signal score
23 / 100
Composite score across the factors below. Higher = stronger signal that this story matters right now.
Newsworthiness bucket
Tool
The item describes a specific bug and workaround related to an AI agent's tool usage, not a new release or major industry event.
Source corroboration
Single-source cluster
Only one publisher covered this so far. Single-source stories can still rank when the publisher is high-authority, but they lack cross-source corroboration.
Topics
product, other
Editorial topic classification. Feeds into how the story surfaces on /topic/<slug> hub pages and into the per-entity coverage mix.
AI-industry relevance
High
Clearly on-topic for AI-industry coverage.
Story freshness
Breaking (< 6h)
Fresh story with cross-source coverage still developing. Ranking may shift as more sources report.

Full methodology in our editorial standards.

COVERAGE [1]

  1. dev.to — Claude Code tag TIER_1 English(EN) · Rulestack ·

    Our Claude Code hook blocked open with a URL but not open "$u" in a for loop, and 9 pages opened in the wrong profile

    <blockquote> <p>Our PreToolUse hook blocked one spelling of a bare <code>open &lt;URL&gt;</code>, so on 2026-10-13 a <code>for u in …; do open "$u"; done</code> loop walked nine links straight past it into the wrong browser profile, the third time since July. The rewrite treats a…

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