v1.88.1

This release adds session forking by user-message ordinal and includes documentation updates for recently merged features.

What's New

• Adds the ability to fork a session by user-message ordinal, allowing clients to target "the Nth user message" directly without translating to a flat message-stream index

Technical Changes

• Bumps github.com/dgageot/rubocop-go to pull in a new whole-program, inter-procedural dataflow analysis engine and the Lint/ContextConnectivity cop
• Updates documentation for the plan builtin toolset, the readonly attribute for toolsets and agents, and top-level shared toolsets with use_toolsets
• Fixes tool ordering and list_plans description in plan docs; adds updatedAt to read_plan description

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What's Changed

• docs: update docs for features merged 2026-06-25 (plan toolset, readonly, shared toolsets) by @aheritier in #3244
• docs: update CHANGELOG.md for v1.88.0 by @docker-read-write[bot] in #3245
• chore: bump rubocop-go for whole-program context cop by @dgageot in #3247
• feat(server): fork session by user-message ordinal by @trungutt in #3250

Full Changelog: v1.88.0...v1.88.1