fix: Win11 pane focus border invisible on normal terminals#296
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AgentA-asaf wants to merge 3 commits intomainfrom
Open
fix: Win11 pane focus border invisible on normal terminals#296AgentA-asaf wants to merge 3 commits intomainfrom
AgentA-asaf wants to merge 3 commits intomainfrom
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On Windows 11, backdrop-filter: blur(0.1px) alone gets optimized away by Chromium's compositor under Win11's DWM, so .block-mask doesn't get promoted to its own GPU layer. Agent terminals worked because the has-agent-color class change forced a style recalculation that accidentally promoted the layer. Fix: add will-change: transform alongside backdrop-filter as a belt-and-suspenders compositor layer promotion. Either hint alone may be optimized away on specific platforms, but together they reliably force layer promotion on both Win10 and Win11. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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ReAgent Diagnostics
| Field | Value |
|---|---|
| ReAgent Version | 5.12.5 |
| Trigger | PR opened |
| Project Context | CLAUDE.md loaded |
| Model | claude-opus-4-6 |
| Effort | high |
| Ref Repos | Disabled |
| Merge Analysis | 1 regression(s) detected |
| Review Time | 66.3s |
| Timestamp | 2026-04-04T15:31:19Z |
| Repository | agentmuxai/agentmux |
| PR | #296 |
Issues:
- package.json:9 - Version 0.33.43 already exists in main (merged via PR #295). Rebase on main and bump to 0.33.44.
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Problem
On Windows 11, normal terminal panes show no blue focus border when selected. Agent-loaded terminals show their colored border correctly. Works fine on Windows 10.
Root cause
PR #267 fixed this with
backdrop-filter: blur(0.1px)to force.block-maskonto its own compositor layer above xterm's GPU surface. On Win11's DWM compositor, Chromium optimizes away the 0.1px blur — the layer promotion doesn't happen. Agent terminals still work because thehas-agent-colorclass change forces a style recalculation that accidentally promotes the layer.Fix
Add
will-change: transformalongsidebackdrop-filteras belt-and-suspenders compositor layer promotion. Either hint alone may be optimized away on specific platforms, but together they reliably force layer promotion on both Win10 and Win11.Test plan
@AgentX — can you verify on your Win11 machine? Portable build at v0.33.43.
🤖 Generated with Claude Code