feat: add official Codex skill and harden task execution

Install and update artemis-use with task diagnostics and plugin guidance. Preserve cross-device file receipts, review canonical reports, guard stage transitions and reduce small history summaries. Improve exploration lifecycle, request recovery and browser live connections.

artemis/graph/graph.py

@@ -249,6 +249,12 @@ async def exit_settlement_node(state: State, ctx: ArtemisContext):
 
     if needs_exploration_turn(ctx):
         return {"exit_settlement_route": "continue"}
+    if (
+        getattr(ctx, "exploration_id", None)
+        and not getattr(ctx, "assert_halt", False)
+        and not _execution_report(state)
+    ):
+        return {"exit_settlement_route": "continue"}
     stop_capture = getattr(ctx, "on_execution_review", None)
     if stop_capture:
         await stop_capture()
@@ -296,6 +302,17 @@ async def _exit_settlement_node(state: State, ctx: ArtemisContext):
             logger.error(f"Failed to read task plan at settlement: {e}")
     snapshot = parse_plan(plan_text)
 
+    execution_report = _execution_report(state)
+    report_delivery = None
+    if execution_report and getattr(ctx, "exploration_id", None):
+        from artemis.exploration.report import save_execution_report
+
+        # Delivery is a real, persisted event. The reviewer can inspect the
+        # complete answer without treating its business claims as evidence.
+        report_delivery = save_execution_report(ctx, execution_report)
+        if needs_exploration_turn(ctx):
+            return {"exit_settlement_route": "continue"}
+
     setup = ctx.execution_setup
     user_stopped = bool(getattr(state, "user_stop_requested", False))
     halted = bool(getattr(ctx, "assert_halt", False))
@@ -336,6 +353,8 @@ async def _exit_settlement_node(state: State, ctx: ArtemisContext):
                     ledger=ledger,
                     check_items=list(snapshot.all_check_items),
                     attempt_id=final_attempt_id,
+                    execution_report=execution_report,
+                    report_delivery=report_delivery,
                 ),
                 timeout=checkpoint_timeout,
             )
@@ -951,6 +970,11 @@ def wrap_update_note_tool(ctx: ArtemisContext, original_tool):
     )
 
 
+def _execution_report(state: State) -> str | None:
+    report = getattr(state, "execution_report", None)
+    return report if isinstance(report, str) and report.strip() else None
+
+
 def convergence_gate(
     state: State, ctx: ArtemisContext
 ) -> Literal["continue", "exit_settlement", "end"]:
@@ -973,10 +997,15 @@ def convergence_gate(
         except Exception:
             return ""
 
-    def _terminal_route() -> Literal["exit_settlement", "end"]:
+    def _terminal_route() -> Literal["continue", "exit_settlement", "end"]:
         """Settlement and final review are decoupled from each other but share
         the entry: any check item, in-flight/queued attempt, ledger record, or
         an enabled final review forces the settlement node."""
+        if getattr(ctx, "exploration_id", None) and not getattr(ctx, "assert_halt", False):
+            if not _execution_report(state):
+                return "continue"
+            # Even with verification disabled, persist and deliver the report.
+            return "exit_settlement"
         plan_snapshot = parse_plan(_read_plan())
         needs_settlement = (
             bool(plan_snapshot.all_check_items)