docs: improve README - #2

🏁 Script executed:

#!/bin/bash
set -eu
printf '%s\n' '--- README.md lines 96-110 ---'
sed -n '96,110p' README.md
printf '%s\n' '--- references to Copilot Chat and Copilot in README.md ---'
rg -n -i 'copilot|chat' README.md | head -80

Repository: yulin0629/github-copilot-tutorial

Length of output: 4741

🌐 Web query:

Visual Studio Marketplace GitHub Copilot Chat GitHub.copilot current listing companion extension installed with GitHub Copilot

💡 Result:

As of August 2026, the installation and management of GitHub Copilot features have been unified, and the previously separate "GitHub Copilot Chat" extension is no longer a distinct, manually installed companion extension in modern development environments [1][2]. In Visual Studio 2022 (version 17.10 and later), GitHub Copilot and GitHub Copilot Chat are integrated into a single, built-in extension [3][1]. This unified experience is included by default with all Visual Studio workloads and is managed directly through the Visual Studio Installer rather than the Marketplace [1][2]. For older versions of Visual Studio (17.8 and 17.9), these features were provided as two separate extensions, but this model has been deprecated in favor of the integrated, unified package [1][2]. Similarly, in Visual Studio Code, the evolution of the Copilot extensions has led to their consolidation. The GitHub Copilot Chat repository was archived in May 2026 [4], and its functionality has been integrated into the core GitHub Copilot experience in VS Code [5][6]. Consequently, users no longer need to install a separate "companion" extension to access chat features; installing the primary GitHub Copilot extension provides the complete suite of AI-assisted capabilities [5].

Citations:

• 1: https://visualstudio.microsoft.com/github-copilot/
• 2: https://devblogs.microsoft.com/visualstudio/introducing-the-new-copilot-experience-in-visual-studio/
• 3: https://learn.microsoft.com/en-us/visualstudio/ide/visual-studio-github-copilot-chat?view=visualstudio
• 4: https://github.com/microsoft/vscode-copilot-chat/releases
• 5: https://github.com/microsoft/vscode-copilot-chat/blob/main/CHANGELOG.md
• 6: https://github.com/microsoft/vscode-copilot-chat/tree/refs/heads/main

🏁 Script executed:

#!/bin/bash
set -eu
for url in \
  'https://marketplace.visualstudio.com/items?itemName=GitHub.copilot' \
  'https://marketplace.visualstudio.com/items?itemName=GitHub.copilot-chat' \
  'https://raw.githubusercontent.com/microsoft/vscode-copilot-chat/main/CHANGELOG.md' \
  'https://raw.githubusercontent.com/microsoft/vscode-copilot-chat/main/README.md'
do
  printf '\n--- %s ---\n' "$url"
  curl -LfsS --max-time 20 "$url" \
    | tr '\r\n' ' ' \
    | grep -Eo 'GitHub Copilot Chat|companion extension|GitHub Copilot|archived|deprecated|integrat[^<"]*' \
    | head -20 || true
done

Repository: yulin0629/github-copilot-tutorial

Length of output: 32207

🌐 Web query:

site:code.visualstudio.com GitHub Copilot Chat extension bundled integrated GitHub Copilot VS Code 2026

💡 Result:

As of August 13, 2026, GitHub Copilot Chat is no longer a separate, manually installed extension in Visual Studio Code [1]. Over the course of 2025 and early 2026, Visual Studio Code underwent a transition to consolidate all Copilot functionality [2][3]. Previously, Copilot features were split between two extensions: the original GitHub Copilot extension (for ghost text/inline suggestions) and the GitHub Copilot Chat extension [2]. Key milestones in this transition included: - Deprecation of the original GitHub Copilot extension: By early 2026, the original GitHub Copilot extension was deprecated and automatically uninstalled when users updated VS Code, with all its functionality migrated to the Copilot Chat extension [2][3]. - Integration into VS Code: By the release of version 1.116, GitHub Copilot became a built-in feature of Visual Studio Code [1]. New users no longer need to install any extension to access Copilot capabilities, such as chat, inline suggestions, and agents [1]. These AI features are available out of the box with a standard VS Code installation, requiring only a GitHub account sign-in to enable them [1][4]. Existing users who already had the extensions installed were not negatively affected by these changes, as the system managed the transition automatically [1]. If you wish to disable these built-in AI features, you can still do so via the chat.disableAIFeatures setting [1].

Citations:

• 1: https://code.visualstudio.com/updates/v1_116
• 2: https://code.visualstudio.com/blogs/2025/11/04/openSourceAIEditorSecondMilestone
• 3: https://code.visualstudio.com/updates/v1_109
• 4: https://code.visualstudio.com/docs/copilot/overview

🌐 Web query:

site:marketplace.visualstudio.com/items?itemName=GitHub.copilot-chat "companion extension"

💡 Result:

In software development, particularly within environments like Visual Studio Code, a companion extension is a secondary tool designed to work in conjunction with another primary application, extension, or service to extend its functionality, bridge environments, or improve workflow integration [1][2][3]. Key characteristics and roles of companion extensions include: Environmental Bridging: They are often used to facilitate communication between different environments, such as a local host machine and a remote development environment (e.g., a dev container, SSH, or WSL session) [2]. A companion extension may handle tasks like certificate management or synchronization across these boundaries that the primary extension cannot manage alone [2]. Feature Enhancement: Some companion extensions provide additional features to a primary tool, such as AI-powered assistance, specialized visualization (like LaTeX rendering), or specific workflow integrations (e.g., file switching or testing tools) that are kept separate from the core codebase [1][4][5][3]. Workflow Integration: They may enable seamless interaction between external tools (like a CLI or browser-based service) and the code editor [1][6]. For example, a companion extension might allow a CLI tool to access editor context (such as open files or selected text) or enable browser-based task submission for competitive programming directly from the IDE [1][6]. Compatibility: Companion extensions are typically dependent on the primary tool they support; they are often installed specifically to augment that primary product [1][2][3]. They are generally not standalone applications and provide little value without the host software they are designed to accompany [2][3].

Citations:

• 1: https://marketplace.visualstudio.com/items?itemName=Google.gemini-cli-vscode-ide-companion
• 2: https://marketplace.visualstudio.com/items?itemName=dnegstad.devcontainer-dev-certs-remote
• 3: https://marketplace.visualstudio.com/items?itemName=oscarphysics.claudetex
• 4: https://marketplace.visualstudio.com/items?itemName=ClementVidal.companion-file-switcher
• 5: https://marketplace.visualstudio.com/items?itemName=JaeyongLee.jupyter-companion
• 6: https://marketplace.visualstudio.com/items?itemName=DivyanshuAgrawal.competitive-programming-helper

🏁 Script executed:

#!/bin/bash
set -eu
python3 - <<'PY'
from html.parser import HTMLParser
from urllib.request import Request, urlopen

class Text(HTMLParser):
    def __init__(self):
        super().__init__()
        self.parts = []
    def handle_data(self, data):
        if data.strip():
            self.parts.append(data.strip())

urls = {
    "copilot_marketplace": "https://marketplace.visualstudio.com/items?itemName=GitHub.copilot",
    "copilot_chat_marketplace": "https://marketplace.visualstudio.com/items?itemName=GitHub.copilot-chat",
    "vscode_1_116": "https://code.visualstudio.com/updates/v1_116",
    "vscode_copilot_overview": "https://code.visualstudio.com/docs/copilot/overview",
}
for name, url in urls.items():
    print(f"\n--- {name}: {url} ---")
    try:
        request = Request(url, headers={"User-Agent": "Mozilla/5.0"})
        html = urlopen(request, timeout=20).read().decode("utf-8", "replace")
        parser = Text()
        parser.feed(html)
        text = " ".join(parser.parts)
        terms = (
            "companion extension", "separate extension", "built-in",
            "built in", "install", "deprecated", "GitHub Copilot Chat",
            "GitHub Copilot extension", "sign in", "enable"
        )
        lower = text.lower()
        positions = sorted(
            {lower.find(term.lower()) for term in terms if lower.find(term.lower()) >= 0}
        )
        for pos in positions[:20]:
            print(text[max(0, pos - 180):pos + 300])
    except Exception as exc:
        print(type(exc).__name__, exc)
PY

Repository: yulin0629/github-copilot-tutorial

Length of output: 1105

🏁 Script executed:

#!/bin/bash
set -eu
python3 - <<'PY'
from html.parser import HTMLParser
from subprocess import check_output

class Text(HTMLParser):
    def __init__(self):
        super().__init__()
        self.parts = []
    def handle_data(self, data):
        if data.strip():
            self.parts.append(data.strip())

urls = {
    "copilot_marketplace": "https://marketplace.visualstudio.com/items?itemName=GitHub.copilot",
    "copilot_chat_marketplace": "https://marketplace.visualstudio.com/items?itemName=GitHub.copilot-chat",
    "vscode_1_116": "https://code.visualstudio.com/updates/v1_116",
    "vscode_copilot_overview": "https://code.visualstudio.com/docs/copilot/overview",
}
terms = (
    "companion extension", "separate extension", "built-in", "built in",
    "install", "deprecated", "GitHub Copilot Chat", "GitHub Copilot extension",
    "sign in", "enable",
)
for name, url in urls.items():
    print(f"\n--- {name}: {url} ---")
    try:
        html = check_output(
            ["curl", "-k", "-LfsS", "--max-time", "20", url],
            text=True,
        )
        parser = Text()
        parser.feed(html)
        text = " ".join(parser.parts)
        lower = text.lower()
        positions = sorted(
            {lower.find(term.lower()) for term in terms if lower.find(term.lower()) >= 0}
        )
        for pos in positions[:25]:
            print(text[max(0, pos - 180):pos + 300])
    except Exception as exc:
        print(type(exc).__name__, exc)
PY

Repository: yulin0629/github-copilot-tutorial

Length of output: 9668