Problemsby GlyphGitHub Copilot upgrades break working setups
23 posts from 21 people18d activeSteady, +3 this week
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Copilot Custom Endpoint output formatting is broken in thinking/reasoning mode after VS Code 1.145.1 update
...1.145.1. The Custom Endpoint works, but the formatting of the thinking/reasoning output is broken. You can also shorten the title to: Copilot Custom Endpoint thinking-mode output formatting is broken after VS Code 1.145.1 update
Copilot Custom Endpoint output formatting is broken in thinking/reasoning mode after VS Code 1.145.1 update
...1.145.1. The Custom Endpoint works, but the formatting of the thinking/reasoning output is broken. You can also shorten the title to: Copilot Custom Endpoint thinking-mode output formatting is broken after VS Code 1.145.1 update
Copilot harness on Remote WSL: Keep/Undo review card uses backslash paths and cannot open files after #342158
...directory is displayed as, for example: instead of: Clicking the file in the review card fails to open it. The original edit tool input uses a POSIX path; the incorrect separators appear in the review UI. Paths above are anonymized examples. ## Impact and additional observations...
Sequential Copilot Agent Host steering stays pending after the first message is consumed
### Environment - VS Code: source checkout at `80b58799654016b1c83e1eb2c14b517a3932b7fb` (current main at investigation time) - Feature: Copilot Agent Host steering - Automated reproduction: fake SDK provider test on Linux; live SDK and UI were not independently verified -...
Copilot harness: restore access to VS Code-aware explicit context items
Now that the Copilot harness is becoming the default target, a UX regression relates to the use of Explicit Context items through the Chat input box. The Local harness is VS Code-aware and allows attaching multiple useful explicit context items: Notably, the Local harness allows...
Add opt-in setting to keep Primary Side Bar visible when maximizing Secondary Side Bar
## Problem Currently, when using **Maximize Secondary Side Bar** in Visual Studio Code, the Primary Side Bar (including Explorer and the project file tree) is automatically hidden. This creates a workflow limitation, particularly when using AI coding assistants such as GitHub...
Model picker redesign in 1.142 is a usability regression — please revert or rework
Does this issue occur when all extensions are disabled?: Yes VS Code Version: 1.143.1 OS Version: Windows 10-11 x64 Steps to Reproduce: Open VS Code 1.142 (or the version where the model picker was redesigned). Open the GitHub Copilot Chat panel. Click on the model picker...
Copilot: disabled SDK-managed plugin still executes hooks in fresh chats
## Disabled SDK-managed plugin still executes native hooks Found while testing #343747. **This also reproduces on unpatched main `47d7fb3529a`; it is not introduced by #343899.** Environment: local Code OSS Dev 1.144.0, macOS arm64, Copilot harness, `@github/copilot-sdk` 1.0.26,...
Agent host (Copilot CLI) chat becomes read-only and its session state is lost after adding a folder to the workspace
Type: Bug When I add a folder to a single-folder workspace (which converts it to an untitled multi-root workspace) while an agent-host (Copilot CLI) chat is open, the window reloads and the chat becomes read-only. The conversation is not recoverable afterwards. The session's...
Auto "Move to Copilot" archives local chat but discards the new agent host session as empty ("Provider copilotcli is not ready", "Adoption declined: marker=missing")
### Description ## Summary On a machine with org-managed Copilot settings, opening an existing local (panel) chat triggers the automatic Move to Copilot. The new Copilot agent host session is created but never opened: the client subscribes with a `copilotcli:` URI, the provider...
Customization Migration keeps deleted prompts in the list
- Copilot Chat Extension Version: Not captured. - VS Code Version: Insiders, commit `087f03b7b82a0c89753986603421c3d24a24cd41`, built 2026-10-20. - OS Version: macOS, exact version not captured. - Feature: Agents window > Customizations > Migration. - Selected model: Not...
Copilot "Local" mode is missing in VS Code 1.142.0
### Problem After upgrading to VS Code 1.142.0, the **Local** mode/option is no longer available in Copilot. Previously, I could select **Local** from the Copilot mode dropdown. However, in 1.142.0, the dropdown only shows: - Copilot - Cloud The **Local** option is missing. ###...
Copilot harness tool-control regression: missing Local-style Configure Tools picker and per-tool MCP toggles
...harness does not provide an equivalent experience. Its Agent Customizations UI also fails to provide individual toggles for Pylance MCP tools: searching for `pylance` finds **pylance mcp server**, but I can only enable or disable the entire server/category. **Please provide the...
[Performance] Copilot Chat noticeably slow on all modes
Started happening after the last update into Harness mode - Copilot Chat Extension Version: The latest - VS Code Version: 1.42 - OS Version: Windows_NT x64 10.0.26100 - Feature (e.g. agent/edit/ask mode): Copilot Chat, using Efficient mode in Local and Copilot - Selected model...
Copilot Agent Host: custom agent frontmatter hooks are dropped
Reported on VS Code 1.143.0-insider, commit `4c6cba15`, using the Copilot / Agent Host harness. ### Steps to reproduce 1. In a trusted workspace with hooks enabled, define a custom `.agent.md` with a `SessionStart` marker hook and a `PreToolUse` hook that denies shell execution....
SDK Marketplace plugin install completes but card reports stale inventory
Testing #340922 - VS Code Insiders: `1.142.0-insider`, commit `dab4f45f6cbfbd55ff3de3ac3a328fb7d6d2f642` - OS: macOS arm64 - Session Target: Copilot - Profile and `COPILOT_HOME`: disposable and isolated ## Steps to reproduce 1. Enable: 2. Start a new chat and select **Copilot**...
Insiders update regression: Local harness missing and older chat sessions disappear when opened
...context only; causality has not been established. ## Troubleshooting status - No setting workaround has been tested yet, including `chat.editor.localAgent.enabled`. - No clean-profile or extensions-disabled reproduction has been performed. - No chat storage reset or deletion has...
Windows emoji panel (Win+.) inserts nothing in the editor when `editor.editContext` is enabled
...character is inserted at the cursor position. **Actual:** Nothing is inserted. ### Workaround Adding the following to the user settings fixes the problem: "editor.editContext": false The emoji panel works again immediately after changing the setting, even without restarting VS...
Copilot Agent Host does not surface MCP progress notifications shown by Local Harness
## Summary MCP `notifications/progress` messages are visible when a long-running tool is invoked through VS Code's Local Harness, but the same progress is not surfaced when the tool is invoked through the Copilot Agent Host Harness. The tool eventually completes successfully in...
Alert sweep: track advisories with no patched release instead of skipping them
## Problem The daily Dependabot alert sweep (`scripts/dependabot-alerts.mjs`, added by #4874) skips an alert whose advisory has no `first_patched_version`. Its reasoning: there is nothing to bump to, so an issue asking for a bump would be noise. The Inspector's sweep, which it...
Agent Host resumes a completed Copilot turn after state divergence, causing assistant-prefill 400
- Copilot Chat Extension Version: Built-in Agent Host integration (no separately listed Copilot extension) - VS Code Version: 1.141.0-insider (`73d5322bb28c1a3c449fcee6c3869af33fad5027`, arm64) - OS Version: macOS 27.0 (26A428) - Feature: Agents window / Copilot CLI Agent Host /...
Python: extract_range(preserve_pairs=True) reorders messages around a call/result pair (fix open as PR #14165, unlinked)
**Describe the bug** `extract_range()` in `python/semantic_kernel/contents/history_reducer/chat_history_reducer_utils.py` (used by `ChatHistorySummarizationReducer` with `preserve_pairs=True`) scrambles the chronological order of the extracted messages whenever a...
GitHub Copilot inline suggestions fail when parent directory name contains a space on Windows
# GitHub Copilot inline suggestions fail when parent directory name contains a space on Windows ## Description GitHub Copilot ghost-text/inline completions stop working when the active file is inside a directory whose name contains a space. The issue is reproducible with a...
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About this problem
Evidence
23 posts from 21 people in 3 places, about 2 a week over 72 days. Mostly on microsoft/vscode, microsoft/semantic-kernel, modelcontextprotocol/servers. Tools named alongside: VS Code, Observe, Claude, Model Context Protocol.
Frustration Frustration 0 of 3· Seen on GitHub issues
Summary, model-written
GitHub Copilot users lose local execution options after updates, encounter inline suggestion failures in folders with spaces, and experience broken agent customization controls.
How it was grouped
Posts that state a pain and match the "breaking-changes" rule about GitHub Copilot. First post Aug 27, 2026, latest Nov 6, 2026. Corroborated: 3 or more posts from 2 or more people or places. Method
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Other GitHub Copilot problems
GitHub Copilot outages and slowdowns disrupt work
18 posts from 18 people on Glyph Ibis.
GitHub Copilot users keep asking for help
Top post: "Broken thoughts formatting", one of 39 posts from 33 people on Reddit, GitHub issues, App Store reviews.
Trouble with GitHub Copilot harness
Top post: "Copilot harness: in-Chat terminals are more difficult to follow and cancel by default", one of 16 posts from 14 people on GitHub issues, Reddit.
Trouble with GitHub Copilot agent
Top post: "Copilot Agent edit review workflow became less intuitive in VS Code 1.143.x", one of 12 posts from 12 people on GitHub issues, Reddit.
Trouble with GitHub Copilot chat
Top post: "In Copilot chat - local mode, BYOK `chat-completions` reasoning models' CoT are not rendering correctly", one of 10 posts from 10 people on GitHub issues, Reddit.
GitHub Copilot feels slow and laggy
9 posts from 9 people on Reddit, GitHub issues, Hacker News.
GitHub Copilot is hard to run and test locally
5 posts from 5 people on GitHub issues.
Trouble with GitHub Copilot loop
Top post: "Authentication Loop with GitHub Copilot Enterprise (GHE)", one of 4 posts from 4 people on GitHub issues, Reddit.
Trouble with GitHub Copilot session
Top post: "Missing undo and keep buttons on copilot session changes", one of 4 posts from 4 people on Reddit, GitHub issues.
GitHub Copilot rate limits and usage caps block work
3 posts from 3 people on GitHub issues, Hacker News.
GitHub Copilot login, SSO or OAuth breaks
3 posts from 3 people on GitHub issues, Reddit.
GitHub Copilot gives confidently wrong answers
3 posts from 3 people on Reddit, GitHub issues.
History