v0.3.26

Fixed

• Resolved SSE stream corruption caused by byte/string position mismatch in streaming parse flow.
• Hardened base URL validation to reject non-HTTP/HTTPS schemes.
• Prevented multi-byte UTF-8 truncation panics in common-prefix and runtime thread summary paths.
• Corrected context usage alert thresholds by separating warning and critical trigger levels.

Changed

• Removed non-code utility tools from the runtime tool registry (calculator, weather, sports, finance, time) and related wiring.
• Consolidated duplicate URL encoding helpers by delegating to shared crate::utils::url_encode.
• Replaced broad crate-level lint suppressions with targeted #[allow(...)] annotations where justified.
• Cleaned up dead APIs, unused struct fields, unused builder helpers, and non-integrated modules.
• Addressed clippy findings across the codebase (collapsible conditionals, defaults, indexing helpers, and API signature cleanup).