Changelog

Version 0.16.10

Every @aparte/* package ships at this version (they are released in lockstep).

Patch Changes

33b8cc0: AparteConversationManager.setTitleProvider(fn) replaces how a new conversation is titled from its first user message.

A conversation’s title was decided in one private place, _autoTitle, and it was the message as typed. A consumer with a titler — a model in the browser, a request to a backend, a heuristic — had no way in short of racing updateTitle behind every send, and losing the race on the sidebar. The seam is on the manager, which owns that one place: setTitleProvider(provider) / getTitleProvider(), plus a titleProvider constructor option. The provider receives the message’s text and the message, may be async, and is consulted once per conversation; an empty answer or a throw leaves the default, so a titler that fails never loses the message from the list. updateTitle is untouched. @aparte/plugin-titler binds an aparte-titler model to it. _@aparte/core
36af623: <aparte-scroll-rail> works on a long conversation: it no longer rebuilds itself every frame, every turn stays reachable and the current tick stays visible, a click lands on its message and keeps its mark, and the rail sits clear of a classic scrollbar, centred on the transcript rather than the composer, and never taller than a share of it.

Measured in Chromium, Firefox and WebKit on a 40-turn chat before the fix: the rail rebuilt itself 61 to 146 times a second at rest, with a new IntersectionObserver each time, because its mutation observer watched the whole host subtree — the rail included — and every rebuild replaced every tick. Nothing on a tick survived a frame: focus, the arrow keys, a hover tooltip. Past sixteen ticks the rest was clipped, the current one included, so the mark was invisible on the long thread the rail exists for. A jump ended on the wrong mark two times in three, and landed up to 1,213px off the message on a long transcript, because the bubbles carry content-visibility: auto and a scroll aims at an estimated position.

Now the rail drops its own mutations, reconciles its ticks by message id (the same nodes, so focus, hover and the tooltip survive an appended turn or a streaming reply) and re-observes only when the bubbles change. It is the height of its list, capped at 60% of the transcript (--aparte-scroll-rail-share) and centred on it — a list of ticks, as LobeChat’s, not a full-height minimap. When more turns exist than 24px targets fit in that cap, it tightens the pitch to what fits — never under 6px — by setting --aparte-scroll-rail-hit-size and --aparte-scroll-rail-gap on itself; past that floor it scrolls, keeping the current tick in its window, and the arrows still walk every tick. A jump holds its mark until the transcript has settled, then re-aligns on the message when the scroll landed off it. Three measurements are published on the element for the stylesheet — --aparte-scroll-rail-bar (a classic scrollbar’s width), --aparte-scroll-rail-block-start and --aparte-scroll-rail-block-end (the transcript’s extent within the host) — and the reading band now starts at the top of the scroll surface so that a bubble a jump aligned there counts.

In overlay-composer mode the viewport no longer counts the rail as part of the floating bottom stack when it measures --aparte-bottom-inset: the stylesheet already named the rail as not the stack, the measurement had not, and a rail centred on the transcript froze the inset at the distance from its own top while the composer grew under a draft.

If you had styled the rail: it is a flex column now, overflow-y: auto with no visible scrollbar, and its top is the middle of the transcript’s measured span rather than of the host. _@aparte/core
3df9174: New package: setupTitler(manager, { titler: loadTitler }) titles each conversation from its first message with an aparte-titler model — 3 to 6 words, in the browser, no API call.

The model is not a dependency of the plugin: hand it @aparte/titler-latin’s loadTitler (17 languages, 133 KB), a Titler, a promise of one, or any object with title(message, budget?). The loader runs once, the first time a title is needed. createTitleProvider(options) is the provider alone, for a manager built with the titleProvider option; the teardown returned by setupTitler restores the previous provider. _{@aparte/plugin-titler}

_{Version-only bumps (no changes of their own): @aparte/engine, @aparte/provider-ai-sdk, @aparte/provider-openai-compat, @aparte/provider-scenario, @aparte/provider-transformers, @aparte/plugin-approval, @aparte/plugin-artifacts, @aparte/plugin-ask-user, @aparte/plugin-compaction, @aparte/plugin-marked, @aparte/plugin-model-selector, @aparte/plugin-shiki, @aparte/plugin-streaming-markdown, @aparte/angular, @aparte/react, @aparte/svelte, @aparte/vue, @aparte/locale-fr, @aparte/docs-mcp.}