[gandazgul]

Converts the HostedSession interaction broker to TypeScript without changing prompt handling, review authority, metadata, cancellation, remote/local answer races, or response normalization. Named request, option, response, adapter, and surface types stay with the implementation and derive interaction kinds/outcomes from the owning vocabulary. Updates all 64 consumers, three live references, and the JavaScript baseline.

Typed promise settlements remove the old race-result assertion. Native outcome assertions replace the existing any cast; opaque metadata and caught-error boundaries retain their existing contracts. The named option type preserves the original JSDoc compatibility with UI option records. No runtime guards or normalization rules are added. Errors and existing test assertions/cases remain unchanged.

Validation:

• Frozen root/docs installation with Bun 1.4.3; initialized submodules are clean.
• All 11 preliminary CI checks pass, including type checks, lint, language policy, documentation links, and Workspace build.
• All 126 existing focused cases pass: 103 SessionRuntime, two Plan review conversation, 15 TUI interaction adapter, and six Plan review recovery cases. Case-count delta is zero.
• Emitted runtime JavaScript AST matches the original module exactly; all 64 consumers match apart from native extension references.
• Independent Standards, Spec, and Tests reviews are clear.
• Full GitHub source and Golden CI required before merge.