ticket: record orchestration plan implementation report

.yoi/tickets/open/20260607-035710-ticket-orchestration-plan-tool/item.md

@@ -8,7 +8,7 @@ priority: P1
 labels: [ticket, orchestrator, planning, workflow, tools]
 workflow_state: 'inprogress'
 created_at: 2026-06-07T03:57:10Z
-updated_at: '2026-06-08T12:51:32Z'
+updated_at: '2026-06-08T13:15:33Z'
 assignee: null
 queued_by: 'workspace-panel'
 queued_at: '2026-06-08T11:21:13Z'

.yoi/tickets/open/20260607-035710-ticket-orchestration-plan-tool/thread.md

@@ -208,3 +208,26 @@ Spawned sibling Coder Pod:
 The previously queued schema cleanup dependency is complete and closed, so this Ticket is now the active queued-route implementation.
 
 ---
+
+<!-- event: implementation_report author: coder at: 2026-06-08T13:15:33Z -->
+
+## Implementation report
+
+Coder implementation completed for lightweight Ticket orchestration plan tools.
+
+Storage/tool design:
+- Added typed JSONL artifact storage at `artifacts/orchestration-plan.jsonl` per Ticket.
+- Added append/query backend API and LLM tools `TicketOrchestrationPlanRecord` / `TicketOrchestrationPlanQuery`.
+- Query is read-only and works by Ticket id/slug and/or relation kind; record creation is in the mutating Ticket capability set.
+- Plan records do not mutate `workflow_state`, reorder queues, start work, or store local runtime/socket/session details.
+
+Validation completed:
+- `cargo fmt --check`
+- `git diff --check`
+- `cargo run -q -p yoi -- ticket doctor`
+- `cargo check --workspace`
+- `cargo test -p ticket`
+- `cargo test -p pod feature::builtin::ticket`
+- `nix build .#yoi`
+
+---