This release includes 1 breaking change for platform teams planning a safe upgrade.
✓ No known CVEs patched in this version
Topics
+6 more
Affected surfaces
ReleasePort's take
Moderate signalAuthenticate Windows named-pipe peers and tighten helper-process cleanup; Wire protocol v5 requires restarting the daemon before using RMUX 0.9.0 clients or SDKs.
Why it matters: Security severity rated 80 for pipe authentication changes; breaking change with severity 75 mandates daemon restart before connecting with version 0.9.0 clients.
Summary
AI summaryWire protocol v5 requires restarting the daemon before using RMUX 0.9.0 clients or SDKs.
Changes in this release
| Type | Severity | Summary | CVE |
|---|---|---|---|
| Security | High |
Authenticate Windows named-pipe peers, bound pre-authentication and terminal resources, and tighten helper-process cleanup. Authenticate Windows named-pipe peers, bound pre-authentication and terminal resources, and tighten helper-process cleanup. Source: llm_adapter@2026-07-18 Confidence: high |
— |
| Breaking | High |
Wire protocol v5 requires restarting an older daemon before connecting with a 0.9.0 client or SDK. Wire protocol v5 requires restarting an older daemon before connecting with a 0.9.0 client or SDK. Source: llm_adapter@2026-07-18 Confidence: high |
— |
| Feature | Medium |
Add stable pane identities, revisioned pane-state streams, foreground process snapshots, and explicit argv or shell process specs. Add stable pane identities, revisioned pane-state streams, foreground process snapshots, and explicit argv or shell process specs. Source: llm_adapter@2026-07-18 Confidence: high |
— |
| Feature | Low |
Extend command parsing, formats, hooks, control and copy mode, startup configuration, and cross-platform packaging behavior. Extend command parsing, formats, hooks, control and copy mode, startup configuration, and cross-platform packaging behavior. Source: llm_adapter@2026-07-18 Confidence: high |
— |
Full changelog
RMUX 0.9.0 hardens daemon and client boundaries, expands the SDK, and improves tmux 3.7b compatibility.
- Authenticate Windows named-pipe peers, bound pre-authentication and terminal resources, and tighten helper-process cleanup.
- Add stable pane identities, revisioned pane-state streams, foreground process snapshots, and explicit argv or shell process specs.
- Extend command parsing, formats, hooks, control and copy mode, startup configuration, and cross-platform packaging behavior.
Wire protocol v5 requires restarting an older daemon before connecting with a 0.9.0 client or SDK.
Breaking Changes
- Wire protocol v5 mandates restarting older daemons before connecting with a 0.9.0 client or SDK.
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