chore(main): release 0.42.0 (#745)

🤖 I have created a release *beep* *boop*
---


##
[0.42.0](https://github.com/agentclientprotocol/claude-agent-acp/compare/v0.41.0...v0.42.0)
(2026-06-05)


### Features

* **deps-dev:** bump obug from 2.1.1 to 2.1.2 in the minor group
([#743](https://github.com/agentclientprotocol/claude-agent-acp/issues/743))
([7ffb78c](7ffb78c572))
* Send message ids for assistant and user messages
([#750](https://github.com/agentclientprotocol/claude-agent-acp/issues/750))
([18516a3](18516a3088))
* Update Claude Agent SDK to 0.3.165
([#746](https://github.com/agentclientprotocol/claude-agent-acp/issues/746))
([23cbe6f](23cbe6f58f))


### Bug Fixes

* Prevent cross-family model matching in resolveModelPreference
([#731](https://github.com/agentclientprotocol/claude-agent-acp/issues/731))
([f4704c1](f4704c168f))
* Prune tool cache per session after results
([#748](https://github.com/agentclientprotocol/claude-agent-acp/issues/748))
([ec14211](ec14211056))
* Update to better utilize existing SDK data
([#747](https://github.com/agentclientprotocol/claude-agent-acp/issues/747))
([398f763](398f763f71))

---
This PR was generated with [Release
Please](https://github.com/googleapis/release-please). See
[documentation](https://github.com/googleapis/release-please#release-please).

Co-authored-by: acp-release-bot[bot] <246668977+acp-release-bot[bot]@users.noreply.github.com>

.release-please-manifest.json

@@ -1,3 +1,3 @@
 {
-  ".": "0.41.0"
+  ".": "0.42.0"
 }