Claude Opus4.6 can't even write a 40 character htrml file

[DanVolker4]

Type: Bug

it wont write.

VS Code version: Code 1.119.0 (8b640ee, 2026-05-05T11:23:50-07:00)
OS version: Windows_NT x64 10.0.26200
Modes:

System Info

Item	Value
CPUs	AMD Ryzen 7 3700X 8-Core Processor (16 x 3600)
GPU Status	2d_canvas: enabled GPU0: VENDOR= 0x1002, DEVICE=0x731f [AMD Radeon RX 5700 XT], DRIVER_VENDOR=AMD, DRIVER_VERSION=32.0.21043.10005 ACTIVE GPU1: VENDOR= 0x1414, DEVICE=0x008c [Microsoft Basic Render Driver], DRIVER_VERSION=10.0.26100.7309 Machine model name: Machine model version: 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 webgl: enabled webgl2: enabled webgpu: enabled webnn: disabled_off
Load (avg)	undefined
Memory (System)	63.93GB (49.47GB free)
Process Argv	--crash-reporter-id ed883aa6-7b1e-4a33-a96d-beac61c282d2
Screen Reader	yes
VM	0%

Extensions (12)

Extension	Author (truncated)	Version
copilot-chat	Git	0.48.1
claude-code	Ant	2.1.145
continue	Con	1.2.22
rainbow-csv	mec	3.24.1
debugpy	ms-	2026.6.0
python	ms-	2026.4.0
vscode-pylance	ms-	2026.2.1
vscode-python-envs	ms-	1.30.0
remote-ssh	ms-	0.122.0
remote-ssh-edit	ms-	0.87.0
powershell	ms-	2025.4.0
remote-explorer	ms-	0.5.0

A/B Experiments

vsliv368cf:30146710
pythonvspyt551cf:31249601
binariesv615:30325510
nativeloc1:31344060
dwcopilot:31170013
dwoutputs:31242946
copilot_t_ci:31333650
e5gg6876:31282496
pythonrdcb7:31342333
6518g693:31463988
aj953862:31281341
6abeh943:31336334
envsdeactivate2:31505458
cloudbuttont:31379625
3efgi100_wstrepl:31403338
ec5jj548:31422691
nes-themisto-294-old-engine:31518874
cp_cls_c_966_ss:31454199
inlinechat_v2_hd992725:31505030
4je02754:31466945
c3h7c220:31478652
ge8j1254_inline_auto_hint_haiku:31490510
38bie571_auto:31478677
cp_cls_c_1081:31454833
conptydll_true:31498968
ia-use-proxy-models-svc:31452481
e9c30283:31461165
test_treatment2:31471001
46204921:31447328
control_6dc23131:31513471
idci7584:31464702
e3e4d672:31494082
ei9d7968:31496641
nes-extended-on:31455476
chat:31457767
8hig5102:31480529
ah:31461780
7e187181:31503455
i2gc6536:31499202
52612955:31516516
ghj88844:31499326
23c7c724:31516425
ddid_c:31478207
hmra_i5g22:31518061
getcmakediagnosticsoff:31489825
7df3h592:31512476
pro_large_t:31499376
cp_cls_t_1082:31516087
logging_enabled_new:31498466
j0d79568:31499440
jb_cp_cls_c_632:31517842
852d2892:31506239
56dj4588:31512888
cg448276_tst_on:31514358
32d76977:31512328
ha629193:31508444
539gd155_c:31506875
2cfga817_c:31517331

[vs-code-engineering]

Thanks for creating this issue! It looks like you may be using an old version of VS Code; the latest stable release is 1.121.0. Please try upgrading to the latest version and checking whether this issue remains.

Happy Coding!

[vs-code-engineering]

Thanks for creating this issue! We figured it's missing some basic information or in some other way doesn't follow our issue reporting guidelines. Please take the time to review these and update the issue.

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Happy Coding!