Reactions & comments
One annotation subsystem serves every share type, with type-specific anchors (see ADR-0006 and SPEC-0006).
Reactions
Emoji reactions (🔥 🙏 🎉 👀 …) with a ＋ picker, anchorable to almost anything —
a markdown block or bullet, a code line or selection, an image region, a webhook
request, a trace turn / tool call / span, or the whole artifact.
Comments
Threaded comments, anchored to a text selection (they land in the right margin / panel), a code line, an image-region pin, or the whole artifact.
Anchors by type
| Share type | Reaction anchors | Comment anchors |
|---|---|---|
| Markdown | block, bullet, whole | text selection, whole |
| Code | line, selection, whole | line, selection, whole |
| Image | region pin, whole | region pin, whole |
| File | whole | whole |
| Webhook | single request, whole | — (reactions only) |
| Trace | turn, tool call, span, whole | span, text selection, whole |
Webhook requests are reactable but not comment-threaded — a shared triage signal, by design. "Discussion happens on the artifacts they produce, not here."
How it's modeled
Anchors are polymorphic — {artifact_id, anchor_type, anchor_ref}, where
anchor_ref is a type-specific locator (a line range, a block id, a region, a span
id, a request id, or character offsets). Reactions are idempotent per identity +
anchor; counts are aggregated and surfaced in the Bin (💬 2 · 👀 3) and in headers
(6 comments · 16 reactions).