v5.20.6

What's Changed

• refactor(tools): collapse duplicated dispatch + skill-fork logic by @griffinwork40 in #408
• fix(trace): gate exit backstop on persisted seal record, not optimistic sealed flag (#171) by @griffinwork40 in #402
• fix(nesting): thread openaiBaseUrl into restricted provider builders so deep OpenAI subagents keep their endpoint by @griffinwork40 in #413
• feat: add /thinking slash command for mid-session thinking-UI toggle by @griffinwork40 in #415

Full Changelog: v5.20.5...v5.20.6