chore(main): release 0.20.0

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🤖 I have created a release beep boop

0.20.0 (2026-06-17)

Features

• bughunter: make /bughunter public + add /bughunter-security & /bughunter-perf with robust fallback prompts (#1621) (1aabe26)
• cli: add local background sessions (#1642) (a1b3346)
• context-collapse: opt-in between-turns context collapse (span summarization) (#1619) (d5588ea)
• memory: add memory.autoWrite alias for autoMemoryEnabled (#1326) (#1396) (b8c7c3b)

Bug Fixes

• bughunter-security: align log-forging exclusion with A9 criteria (1aabe26)
• claude-desktop: add native Windows support for MCP server import (#1653) (e733908)
• context: treat Opus 4.7 as 1M-context capable in modelSupports1M (#1670) (de6b6bd)
• model: preserve [1m] tag for the 'best' alias (#1671) (da551e6)
• provider: centralize provider secret redaction (#1665) (29aea49)
• provider: match xAI base URL by hostname, not 'x.ai' substring (#1669) (1b33fa6)
• sdk: make stub-leak detection TDZ-safe + defer to next microtask (#1287) (#1398) (650fae9)
• settings: correct stale settings path references (#1666) (544b857)

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