Clickable research outputs. The research index now renders structurally: Summary as prose, and the Outputs table with its Path column resolved to clickable artifact buttons that open the same reviewer as build cards (read, quote a passage, comment to the agent).
Artifact chips in the thread. The research worker's final message emits ::stelow-artifact directives per produced file (index + round + sub-steps), rendered by bb as clickable chips that open the file in the workspace viewer. Directive syntax is stripped before the message is mirrored into card comments (plain Markdown there).
Changed
No fake checkboxes in the index. The opportunities list in the card is a status overview — fanned-out items show a ✓ and "fanned out"; selection happens only in the fan-out dialog.
No duplicated Opportunities section. The raw index body no longer renders its own ## Opportunities list above the interactive panel; contract-missing indexes fall back to the body without that section.