v0.1.0

int32[4]-per-cell grid (codepoint, attrs, fg, bg) with main+alt screens and an O(1) scrollback ring. VT/ANSI parser (Paul Williams state machine) with damage tracking, DSR/DA replies, an OSC-52 and title/bell event queue, and mouse-mode flags. Native row-run extraction as the render seam. All state leaves through drained queues; the core never calls back into Scheme.

Verified: 95/95 conformance checks; 5,000,000-iteration fuzz over the untrusted byte path clean under ASan and UBSan. Builds native (native-init) and wasm (compute-only wasm-bridge; registers via the weak sigilwasmvt_register hook in sigil 0.17.16+).

No vt-diff (ANSI emitter) in this release.