chore(main): release 2.1.1

[github-actions]

🤖 I have created a release beep boop

2.1.1 (2026-08-26)

Bug Fixes

• core: a documented filter shape crashed the v3 list actions. (da71a77)
• core: honest return types for Result chaining and the batch envelope (#395) (c7783c3)
• core: reject a non-array filter in v3 callList/fetchList before it crashes mid-page (#403) (da71a77)
• core: throw SdkError, not bare Error, across the public entry points (#382) (7ccd929)
• deps: make the workspace catalog the single source of axios' version (#365) (b4907e7), closes #332
• docs: code-example indentation was stripped with a hard-coded .slice(2), (a5b9538)
• docs: prettier worker could hang the page, and the dedent assumed two spaces (#398) (a5b9538)
• docs: the four correctness items in the code-example subsystem (#393) (2d79b7e)
• docs: the prettier worker could leave a page waiting forever. (a5b9538)
• docs: the two prettier versions had drifted. The worker hard-coded 3.7.4 (a5b9538)
• frame: MessageManager no longer throws on foreign traffic or strands sends (#367) (7b13d02), closes #146
• skills: collapse duplicated recipe helpers and guard against new copies (#386) (e980112)
• skills: stop teaching the removed LoggerBrowser, and fix the logger misuse it left behind (#401) (50a0e19)
• skills: the skill files taught a class removed in 3.0.0. (50a0e19)
• skills: two shipped recipes silently discarded what they logged. (50a0e19)

Changed

• docs: removed dead code and tightened types — four unreferenced files (a5b9538)

Docs

• add an API Reference section indexing the public surface (#383) (ce42d77)
• announce that Node 20 is dropped in 3.0.0, with a site-wide banner (#380) (a266760)
• logger: record what #346 deliberately left outside the isolation (#364) (a29efc2)
• releasing: merging the release PR does not publish to npm (#362) (b6861d7)
• skills: stop teaching offClientSideWarning(), and correct what it does (#366) (f1cbf15), closes #166
• warn that an app which never calls installFinish() receives no events (#377) (fd72e36)

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