Unnamed repository; edit this file 'description' to name the repository. https://code.tjp.lol/pantograph.git/atom?h=main 2026-06-23T16:53:26Z 2026-06-23T16:53:26Z t t@tjp.lol 2026-06-23T15:38:23Z urn:sha1:69a1ee138bb78ad4663fe2d9e58678f7b0d07b74 2026-06-10T21:28:16Z t t@tjp.lol 2026-06-10T20:57:31Z urn:sha1:cee08918509689adbdbd26b6384d5ef3a47e91a2 The root cause was a two-part bug: 1. Engine slot management (tui_engine.zig): The app rebuilds its full component list on every new transcript entry. The old approach drained every slot then re-added them all, resetting every component's render baseline. When earlier content had scrolled into native scrollback (viewport_top > 0), the engine's viewport-escape rule escalated any cut above the viewport top to a scrollback-clearing full redraw — the visible flash on every streamed block while a tool call was expanded. Fix: replace drain+rebuild with syncComponents(), which reconciles the live slot list in place by finding the longest common prefix and suffix (matched by component pointer). Prefix and suffix slots keep their baselines verbatim; only the changed region in the middle gets new empty slots. A pure insertion (the dominant case: a new transcript entry appended just before the pinned input+footer suffix) stays on the differential path with no clear. A structural change (slot replaced or removed) sets force_full for correctness. 2. RenderCache dirty signal (tui_component.zig): firstLineChanged() was returning the retained changed_from diff index even when the cache was clean. A first-paint store records changed_from == 0, so a clean but previously-rendered component was pegging the differential cut to line 0 on every subsequent frame, making unchanged slots above the insertion point drag the cut all the way up. Fix: when the cache is clean, firstLineChanged() returns null unconditionally. The recorded changed_from is now internal render bookkeeping only, not a live signal. Additional changes: - ToolUse.collapsed_tail_lines raised from 5 to 8 lines. - ToolUse collapsed-view test updated to use 12 output lines and collapsed_tail_lines symbolically so the numbers self-document. - tui_app.zig: override-slot test comment and assertion clarified to reflect that the override owns the slot pointer (not just renders it), and the SWAPPED-AT-DETAILS render check replaced with a pointer-equality check. - lua_event_bridge.zig: minor related fixes. - New tests: syncComponents middle-insertion no-clear, syncComponents structural removal forces full, syncComponents override swap; streaming expanded-tools no-clear regression test in tui_app. 2026-06-08T18:25:55Z t t@tjp.lol 2026-06-08T16:41:30Z urn:sha1:e5ed00c52bb10aec811734c5568c881c41e58474 Implement TUI Phase 1: a raw-mode terminal, differential render engine, pinned input box + footer, and component model wired into the libpanto event stream. Adds foundation modules (theme, key, component, input, terminal), the render engine, components, and the app loop; removes the old print CLIRenderer and driveTurn REPL from main.zig. Also removes scratch status reports (tui-p1/, progress.md) for the now completed work.