chore(task-85): finalize closure tracking and launcher path enforcement

docs/subagents/agents/opencode-task93-sync-20260221T070842Z-71c6.md

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+# Agent Session: opencode-task93-sync-20260221T070842Z-71c6
+
+- alias: `opencode-task93-sync`
+- mission: `Synchronize TASK-85 closure tracking and child-task status in Backlog`
+- status: `done`
+- started_utc: `2026-02-21T07:08:42Z`
+- completed_utc: `2026-02-21T07:11:58Z`
+- backlog_task: `TASK-93`
+
+## Intent
+
+- Load TASK-93 + TASK-85 + related child tasks from Backlog MCP.
+- Build execution plan via writing-plans skill.
+- Execute plan via executing-plans skill.
+- Update Backlog task metadata/notes/checklists to satisfy TASK-93 AC.
+
+## Planned Files/Surfaces
+
+- `backlog/tasks/task-93 - Synchronize-TASK-85-closure-tracking-and-child-task-status.md` (via MCP)
+- `backlog/tasks/task-85 - Refactor-large-files-for-maintainability-and-readability.md` (via MCP)
+- Child task tickets linked to TASK-85 (via MCP)
+- `docs/subagents/INDEX.md` (own row only)
+- `docs/subagents/collaboration.md` (append-only note)
+
+## Assumptions
+
+- Backlog already initialized (folder exists).
+- TASK-85 was recently marked Done and needs consistency cleanup.
+
+## Heartbeat Log
+
+- `2026-02-21T07:08:42Z` session started; reading backlog + planning context.
+- `2026-02-21T07:11:58Z` execution complete; TASK-85 synchronized and TASK-93 finalized Done.
+
+## Outcome
+
+- Created plan: `docs/plans/2026-02-21-task-93-sync-task85-closure-plan.md`.
+- Updated `TASK-85` description + implementation notes with child ownership map and ordered remaining scope.
+- Updated `TASK-93` implementation notes, checked all AC/DoD items, set final summary, marked status Done.
+- No product-code changes; backlog/process/documentation surfaces only.