feat(presence): <PresenceStack> avatar-cluster primitive (0.3.0)#124
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The visible half of live collaboration — a who's-here avatar cluster for a shared entity. Built over a DEFINED `PresencePeer[]` contract (id / name / color / avatarRef?), NOT raw Yjs awareness states: what each client publishes + how the awareness feed maps to peers is the live-wiring rung's call, and guessing that payload shape now would repeat the "design against a guess" trap. So this rung is the pure list math + presentation only — testable without the relay, reusable by any app header. - `capPresence(peers, max)` — dedup by id (a peer's multiple tabs/devices collapse to one avatar), cap, `+N` overflow. Pure. - `presenceInitials(name)` — avatar fallback initials (mirrors chat's local `initials`; consolidate chat onto this later). - `<PresenceStack>` — overlapping avatars (peer colour inline per the peer-presence rationale; chrome on theme tokens), image-or-initials, `role="group"` + "N people here" label. New `@brainstorm/sdk/presence-stack` subpath + `.css` + vitest alias. +11 tests (dedup/cap/overflow/empty; initials; render: empty→null, avatars+chip, image-vs-initials, singular/plural label). Lint (incl. the css-token gate) + typecheck clean. Next (live-wiring rung): map the dormant 10.6 awareness feed → PresencePeer[] (names from the roster, colour from peerColor) + mount in app headers. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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The visible half of the 0.3.0 "Trustworthy collaboration" train — a who's-here avatar cluster for a shared entity.
Built over a defined
PresencePeer[]contract (id/name/color/avatarRef?), deliberately not raw Yjs awareness states: what each client publishes into awareness, and how that feed resolves to peers (names from the roster, colour frompeerColor, self-identification), is the live-wiring rung's decision — pinning it here would guess a payload shape that doesn't exist yet (the awareness broadcaster is still dormant). So this rung is the pure logic + presentation only: testable without the relay, reusable by any app header the wiring feeds.capPresence(peers, max)— dedup byid(a peer's multiple tabs/devices collapse to one avatar), cap,+Noverflow. Pure.presenceInitials(name)— avatar fallback (mirrors chat's localinitials; a later pass consolidates chat onto it).<PresenceStack>— overlapping avatars (peer colour inline per the peer-presence rationale; chrome on theme tokens), image-or-initials,role="group"+ "N people here". New@brainstorm/sdk/presence-stacksubpath +.css+ vitest alias.+11 tests (dedup/cap/overflow/empty; initials; render smoke: empty→null, avatars+
+Nchip, image-vs-initials fallback, singular/plural label). Lint incl. the strict css-token gate + typecheck clean.Next presence rung (live wiring): map the dormant
10.6awareness feed →PresencePeer[]and mount the stack in app headers.🤖 Generated with Claude Code