Docker shipped cagent (docker-agent) v1.145.0 on 2026-09-28: ACP requests now propagate W3C traceparent/tracestate with server spans for each of the 13 implemented protocol handlers, plus new lint cops and a lean-TUI fix that preserves scrollback during partial streaming tool calls.
Key Takeaways
- ✓Shipped v1.145.0 — ACP W3C traceparent/tracestate + 13 handler spans
- ✓Lean TUI keeps scrollback during partial streaming tool calls
- ✓New FieldsSeqLookup / SlicesConcat lint cops
- ✓Docs: docker.github.io/docker-agent
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Project Links & Resources
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Core Background & Industry Pain Points
Coding agents in containers need end-to-end traces across IDE, gateway, and sandbox. ACP standardizes requests, but without W3C propagation, agent spans and tool calls stay disconnected.
Architecture Highlights & Internals
v1.145.0 propagates W3C traceparent/tracestate on ACP requests and attaches server spans for all 13 implemented handlers (#4471). Lean TUI now repaints only visible rows during partial streaming tool calls so scrollback survives (#4477). New lint cops nudge FieldsSeq/slices.Concat usage.
Authoritative Benchmarks & Measured Scores
No public SWE-bench/latency table ships with this release—validate continuous traces and lean-TUI scrollback on your stack.
Developer Hands-on Guide
Upgrade to v1.145.0, configure via Docker Agent docs, and ensure ACP clients forward traceparent. See the release notes.
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