chatParticipant must be declared in package.json: copilot-swe-agent #273855
Description
Type: Bug
Launch VSCode
Note that the extension host crashes
Locate the output tab for the Extension Host.
Find the following error:
2025-10-28 21:19:58.431 [error] Error: chatParticipant must be declared in package.json: copilot-swe-agent
at sqt.$registerAgent (vscode-file://vscode-app/c:/Users/Dwayne%20Thomson/AppData/Local/Programs/Microsoft%20VS%20Code/resources/app/out/vs/workbench/workbench.desktop.main.js:509:5906)
I am not aware of any extension that could be attempting to contribute this - I have never installed any extension beyond Copilot Chat. This effectively kills extensions in VSCode, and since VSCode runs purely off extensions for everything from AI Agents to copy-paste, it's unusable.
VS Code version: Code 1.105.1 (7d842fb, 2025-10-14T22:33:36.618Z)
OS version: Windows_NT x64 10.0.26200
Modes:
System Info
| Item | Value |
|---|---|
| CPUs | 11th Gen Intel(R) Core(TM) i7-11800H @ 2.30GHz (16 x 2304) |
| GPU Status | 2d_canvas: enabled direct_rendering_display_compositor: disabled_off_ok gpu_compositing: enabled multiple_raster_threads: enabled_on opengl: enabled_on rasterization: enabled raw_draw: disabled_off_ok skia_graphite: disabled_off trees_in_viz: disabled_off video_decode: enabled video_encode: enabled vulkan: disabled_off webgl: enabled webgl2: enabled webgpu: enabled webnn: disabled_off |
| Load (avg) | undefined |
| Memory (System) | 15.73GB (1.98GB free) |
| Process Argv | --folder-uri file:///c%3A/dev/ai-fundraising/ai-fund-app |
| Screen Reader | no |
| VM | 0% |
Extensions (50)
| Extension | Author (truncated) | Version |
|---|---|---|
| flutter-snippets | ale | 3.0.0 |
| tsl-problem-matcher | amo | 0.6.2 |
| css-theme-completions | con | 0.0.5 |
| dart-code | Dar | 3.120.1 |
| flutter | Dar | 3.120.0 |
| vscode-eslint | dba | 3.0.16 |
| docker | doc | 0.18.0 |
| docs-markdown | doc | 1.0.17 |
| promptscape | dth | 1.1.1 |
| gitlens | eam | 17.6.2 |
| prettier-vscode | esb | 11.0.0 |
| kotlin | fwc | 0.2.36 |
| copilot | Git | 1.388.0 |
| copilot-chat | Git | 0.32.3 |
| vscode-pull-request-github | Git | 0.120.1 |
| vscode-edit-csv | jan | 0.11.7 |
| solidity | Jua | 0.0.185 |
| vsc-python-indent | Kev | 1.21.0 |
| Kotlin | mat | 1.7.1 |
| rainbow-csv | mec | 3.23.0 |
| fluent-icons | mig | 0.0.19 |
| symbols | mig | 0.0.24 |
| vscode-azureappservice | ms- | 0.26.4 |
| vscode-azurefunctions | ms- | 1.19.2 |
| vscode-azureresourcegroups | ms- | 0.11.5 |
| vscode-azurestaticwebapps | ms- | 0.13.2 |
| vscode-azureterraform | ms- | 0.7.0 |
| vscode-containers | ms- | 2.2.0 |
| vscode-docker | ms- | 2.0.0 |
| debugpy | ms- | 2025.15.2025102001 |
| pylint | ms- | 2025.3.12271016 |
| python | ms- | 2025.16.0 |
| vscode-pylance | ms- | 2025.9.1 |
| vscode-python-envs | ms- | 1.10.0 |
| remote-containers | ms- | 0.427.0 |
| remote-wsl | ms- | 0.104.3 |
| extension-test-runner | ms- | 0.0.12 |
| live-server | ms- | 0.4.16 |
| vscode-typescript-next | ms- | 6.0.20251028 |
| vscode-react-native | msj | 1.13.0 |
| vscode-jest | Ort | 6.4.4 |
| prisma | Pri | 6.18.0 |
| vscode-yaml | red | 1.19.1 |
| LiveServer | rit | 5.7.9 |
| vscode-coverage-gutters | rya | 2.14.0 |
| rst-vscode | tht | 3.0.1 |
| win-ca | uko | 3.5.1 |
| vscode-gradle | vsc | 3.17.0 |
| vscode-postcss | vun | 2.0.2 |
| JavaScriptSnippets | xab | 1.8.0 |