Complete Economic Observatory MVP (ADAPTIVE-WP-0002)

Add file-based Bubble, Stripe, and OpenRouter importers; usage attribution,
cost allocation, pricing simulator, credit wallets, and recommendations in the
dashboard API. Document whynot-design UI workflow and archive the finished
workplan with all ten tasks marked done.

projects/coulomb-pricing/tests/test_mvp_sprints.py

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+from __future__ import annotations
+
+from decimal import Decimal
+from pathlib import Path
+
+from observatory.allocation import build_cost_allocation
+from observatory.api import build_dashboard_payload
+from observatory.credits import build_credit_summary, load_credit_wallets
+from observatory.economics import build_snapshot
+from observatory.load import (
+    load_membership,
+    load_monthly_ledger,
+    load_payment_records,
+    load_pricing_models,
+    load_product,
+)
+from observatory.membership_analytics import build_membership_analytics
+from observatory.recommendations import build_pricing_recommendations
+from observatory.simulator import build_pricing_simulations
+from observatory.usage import build_usage_summary, load_usage_records
+
+DATA_DIR = Path(__file__).resolve().parent.parent / "data"
+
+
+def _snapshot(period: str = "2026-06"):
+    product = load_product(DATA_DIR)
+    models = load_pricing_models(DATA_DIR)
+    members = load_membership(DATA_DIR)
+    payments = load_payment_records(DATA_DIR)
+    ledger = load_monthly_ledger(DATA_DIR)
+    return build_snapshot(period, product, models, members, payments, ledger)
+
+
+def test_membership_analytics_counts_active_member() -> None:
+    members = load_membership(DATA_DIR)
+    analytics = build_membership_analytics(members, "2026-06", ["2026-05", "2026-06"])
+
+    assert analytics["active_members"] == 1
+    assert analytics["total_members"] == 1
+
+
+def test_usage_summary_attributes_member_cost() -> None:
+    records = load_usage_records(DATA_DIR)
+    summary = build_usage_summary(records, "2026-06")
+
+    assert summary["record_count"] == 1
+    assert summary["by_member"]["member-tegwick"] == Decimal("0.06")
+
+
+def test_cost_allocation_includes_ai_variable_cost() -> None:
+    snapshot = _snapshot()
+    allocation = build_cost_allocation(snapshot, load_usage_records(DATA_DIR))
+
+    assert allocation["variable_ai_eur"] == Decimal("0.06")
+    assert allocation["cost_floor_eur"] == snapshot.cost_per_member
+
+
+def test_pricing_simulator_compares_candidate_models() -> None:
+    snapshot = _snapshot()
+    models = load_pricing_models(DATA_DIR)
+    simulations = build_pricing_simulations(snapshot, models, Decimal("0.06"))
+
+    assert len(simulations["scenarios"]) == 3
+    assert simulations["active_scenario_id"] == "flat-899-eur-monthly"
+
+
+def test_credit_summary_tracks_remaining_allowance() -> None:
+    wallets = load_credit_wallets(DATA_DIR)
+    summary = build_credit_summary(wallets, {"member-tegwick": Decimal("0.06")}, "2026-06")
+
+    assert summary["wallets"][0]["remaining_eur"] == Decimal("1.94")
+
+
+def test_recommendations_include_hold_or_action() -> None:
+    payload = build_dashboard_payload(DATA_DIR, "2026-06")
+    recs = build_pricing_recommendations(
+        payload["cost_floor"],
+        payload["value_range"],
+        payload["market_price"],
+        payload["pricing_simulations"],
+        payload["usage"],
+    )
+
+    assert recs
+    assert recs[0]["id"] in {"margin-pressure", "usage-pricing-signal", "value-headroom", "hold-course"}
+
+
+def test_dashboard_payload_includes_mvp_sections() -> None:
+    payload = build_dashboard_payload(DATA_DIR, "2026-06")
+
+    assert "membership_analytics" in payload
+    assert "usage" in payload
+    assert "cost_allocation" in payload
+    assert "pricing_simulations" in payload
+    assert "credit_wallets" in payload
+    assert "recommendations" in payload