[zooidbot]

Refs zooid-ai/zooid#16 (not a closing keyword: Lead closes it once both PRs are merged).

Web half of ZOD076. Companion zooid PR: zooid-ai/zooid#141 (adds turn_id / stop_reason to dev.zooid.turn.end). Merge that one first.

• decodeZooidEvent reads produced_output (boolean only), turn_id and stop_reason (strings only); junk types decode to undefined.
• New EmptyTurnIndicator: " ended its turn without output", neutral muted rule, focusable trigger, tooltip with the ambiguity sentence plus Stop reason: <x> when present.
• turn.end renders the indicator only when producedOutput === false. Any other turn.end (output, or an older daemon with no field) renders nothing, which removes the per-turn "TURN ENDED" divider. Intended.
• Stories: Timeline/EmptyTurnIndicator (Default, NoStopReason, LongAgentName, TooltipOpen) and Structures/ThreadViewEmptyTurn (SilentThenAnswered).

Tests: pnpm -C packages/web test 997 passed (155 files); typecheck clean; build OK. UX Tester: ✅ all five stories, light and dark, console clean (no errors or React warnings).
Not verified: the indicator in the full real app (Smoke Tester serves the published @zooid/web, not this branch); that's Ori's manual check after release. No lint script exists in packages/web, so lint wasn't run.
Knowledge impact: ZOD076 (shipped by this pair); ZNC025 (the per-turn "TURN ENDED" divider is gone)
Plan feedback: Phase 0 says branch in Ori's clones, read-only for Coding, so I used worktrees. The plan didn't say Divider stays (still used by session.start); I checked as Step 3.5 advised. Radix tooltips need TooltipProvider in stories and tests; the plan covered that well. The plan never mentions that issue #16 was in Backlog, not Ready.

🤖 Generated with Claude Code

[zooidbot]

Lead review against the ZOD076 plan: no blocking findings.

• The decoder accepts produced_output only as a real boolean. The "false" string case is tested.
• Only producedOutput === false renders. The per-turn "TURN ENDED" divider is gone, which is intended (spec: one marker per turn is the noise to avoid).
• EmptyTurnIndicator matches the Contracts: sentence-case fact, the exact tooltip sentence as a shared constant, the stop reason as a second line, a focusable <button>, and no icon or alert colour.
• The scene story is in ThreadView, which is right because turn.end always carries m.thread. UX Tester passed all five stories in both themes.

Merges after zooid#141 once CI is green.