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Rust backend #623

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@tony tony commented Jan 24, 2026 •
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Summary

  • Add optional Rust backend integration for tmux command execution and server lifecycle checks.
  • Add lightweight JSONL tracing with pytest integration and per-test context.
  • Add optional OpenTelemetry spans/exporter support (OTLP HTTP).
  • Update pytest plugin to support Rust control-mode subscriptions.
  • Extend CI matrix to exercise the Rust control backend when available.
  • Add otel extra and lockfile updates for OTel dependencies.

Notes

  • The vibe-tmux (Rust backend) dependency is not public yet; CI skips Rust backend tests when it’s unavailable.

Closes tmux-python/tmuxp#983

@tony tony changed the title Add optional Rust backend, tracing/OTel instrumentation, and CI coverage Rust backend Jan 24, 2026
@tony tony self-assigned this Jan 24, 2026
tony added 10 commits January 25, 2026 15:22
@tony
feat(libtmux/cmd) add rust backend shim behind env vars
8194b8a 
why: allow libtmux tests to drive a rust-backed tmux_cmd without altering object APIs.
what:
- route tmux_cmd through vibe_tmux when LIBTMUX_BACKEND=rust
- add LIBTMUX_RUST_CONNECTION_KIND for explicit bin/protocol selection
- align raise_if_dead with rust backend exit semantics
@tony
fix(libtmux[rust-backend]) honor config startup semantics
c346262 
why: Config-backed servers should start and load config without breaking liveness checks.
what:
- run first command with -f via tmux bin when server is down
- align rust-backend server helpers to new signature
- refine rust helper error handling and typing
@tony
feat(trace) add rust-backend timing audit hooks
96b9db7 
why: We need per-test timing breakdowns to locate slow paths.
what:
- emit JSONL spans for libtmux rust backend calls
- surface trace summary in pytest terminal output
- capture server is_alive/require_server timing
@tony
feat(trace) add rust_server_cmd context fields
3d97c59 
why: Need per-command context when tracing slow rust backend calls.
what:
- include socket/config/connection_kind on rust_server_cmd span
@tony
fix(common) allow rust server_kind env override
fe6bb88
@tony
feat(rust-backend) add server_kind/control hooks
44e69ea
@tony
fix(python[pytest]) use hints-only refresh in control mode
b771daf 
why: Control-mode refresh hints should not trigger background view capture during tests.
what:
- Subscribe with capture_view=false for rust control-mode test server
@tony
py(deps) Sync pyproject deps
655bb8c
@tony
py: Add otel module
9d37e72
@tony
Sync otel updates
ebc6a35
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[ feature request ] Rewrite in Rust

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