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id: post/thinkaboutit-be/8157
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title: "Quick Tip: GitHub Copilot Chat Modes Are Now Agents, and Edit Mode Is Gone"
summary: "Summary withheld: an Opus review found that the machine-written summary did not match the post. Read the original post."
tier: community
language: en
tags:
  - copilot chat
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    title: "Quick Tip: GitHub Copilot Chat Modes Are Now Agents, and Edit Mode Is Gone"
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    url: https://thinkaboutit.be/2026/09/quick-tip-github-copilot-chat-modes-are-now-agents-and-edit-mode-is-gone/
    title: "Quick Tip: GitHub Copilot Chat Modes Are Now Agents, and Edit Mode Is Gone"
    date: "2026-09-10"
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    quote: Edit did not survive, its diff based editing now sits inside Agent.
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post_id: "8157"
source_id: thinkaboutit-be
source_name: think about IT - Steven Renders
url: https://thinkaboutit.be/2026/09/quick-tip-github-copilot-chat-modes-are-now-agents-and-edit-mode-is-gone/
published_at: "2026-09-10T09:16:38.000Z"
author: Steven Renders
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words: 277
quotes:
  - text: Edit did not survive, its diff based editing now sits inside Agent.
    why_it_matters: Critical change for users relying on Edit mode; they need to know the functionality moved into Agent
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---

# Quick Tip: GitHub Copilot Chat Modes Are Now Agents, and Edit Mode Is Gone

[Read the post](https://thinkaboutit.be/2026/09/quick-tip-github-copilot-chat-modes-are-now-agents-and-edit-mode-is-gone/) · think about IT - Steven Renders (Steven Renders) · 2026-09-10 · 277 words · tier community · **flagged** (a review found a problem)

> Summary withheld: an Opus review found that the machine-written summary did not match the post. Read the original post.

## Quotes

- "Edit did not survive, its diff based editing now sits inside Agent." (Critical change for users relying on Edit mode; they need to know the functionality moved into Agent)

## Context

- Features: Copilot Chat modes, Agent role, Ask role, Plan role, Custom agents, Session Target, Diff-based editing

Source: think about IT - Steven Renders, community blog. Summary, key points and quotes are derived (CONTENT-NOTICE.md); read the original for the full text.