v0.2.6

Added

• Added web_fetch as a built-in read-only tool across mock, local, sandbox, and e2b runtimes.
• Added hosted-tool abstraction via HostedTool.
• Added Anthropic native hosted web_search support through web_search_20250305.
• Added AgentLoopHarness::with_hosted_tools(...) and AgentLoopHarness::with_web_search().
• Added silent-stop detection for empty/whitespace-only model turns with no tool calls.

Changed

• PlanApproval now treats web_fetch as read-only.
• OpenAI-compatible Chat Completions now fails fast when hosted tools are requested; OpenAI web search is reserved for a future Responses API client.
• Anthropic streaming explicitly ignores provider-hosted web-search blocks.

Fixed

• Prevented fetched/cached model-limit entries from reducing known offline fallback limits.