Release 23.0.7

• fix: stop duplicating object array items when streaming structured output (#565) f414c6d
• fix: validate url arrays per-item instead of on the whole array (#567) 87a6720
• feat(openai): add GPT-5.6 model family support (#568) 0bbccda
• docs(mcp): record production interop evidence bb80bb5
• docs(axir): close OAuth port tranche 97492f2
• feat(mcp): port OAuth discovery and grants ca86192
• docs(axir): close MRTR elicitation tranche 9e4f3ed
• feat(mcp): port MRTR elicitation f053c73
• test(mcp): prove foreign server interop 4f0d018
• docs(website): rewrite event runtime concept pages 229acfd
• test(event): expect mrtr_roots_round in demo server tools be42efa
• chore(axir): close context cache recovery backlog f95ec2d
• feat(axir): port managed Gemini context caching e843410
• chore(axir): close modern MCP umbrella backlog f1ca505
• docs(axir): record modern MCP language parity c32c41a
• chore(axir): close subscriptions listen backlog 8db8e31
• feat(axir): verify modern MCP round trips c6253f5
• chore(axir): close OAuth issuer backlog 7911e27
• feat(axir): port MCP OAuth issuer validation 82272c5
• feat(axir): port MCP subscriptions listen 400092a
• chore(axir): close roots-first MRTR backlog fe8baf8
• feat(axir): port roots-first MCP MRTR 0935411
• chore(axir): close Tasks v2 backlog 16c2119
• feat(axir): port MCP Tasks v2 bfe2f5a
• chore(axir): close cache metadata backlog 9087a01
• feat(axir): port MCP cacheable results 2067e57
• chore(axir): close dual-era MCP client backlog e783557
• feat(axir): port dual-era MCP client e43afb3
• chore(axir): close modern transport header backlog c5f4676
• feat(axir): port modern MCP transport headers afaae69
• feat(axir): add modern MCP semantic foundations 75ae884
• chore(axir): close actor multi-fence backlog 63932a8
• feat(axir): port actor multi-fence rejection e872fbb
• fix(mcp): validate subscription acknowledgements 42377de
• feat(mcp): define modern port boundaries db2714d
• feat(mcp): document dual-era client 4d479b9
• feat(mcp): add schema-driven parameter headers f55a529
• feat(mcp): add tasks extension v2 5ac2f72
• feat(mcp): add subscriptions and cache TTL 2907843
• feat(mcp): support multi round-trip requests 2bb681f
• feat(mcp): add dual-era stateless client core d5c3b5f
• feat(mcp): add modern transport header plumbing 4b3bf5b
• feat(mcp): add typed protocol and oauth issuer errors 933fe0a
• feat(mcp): add 2026-07-28 protocol types dceed8b
• chore: exclude ignored worktrees from biome 1d19ab5