rodoHasArrived · rodoHasArrived · Jul 1, 2026 · Jul 1, 2026 · Jul 1, 2026 · Jul 1, 2026
@@ -6,3 +6,4 @@
 {"session_date": "2026-03-27", "mode": "Domain-Focused", "themes": ["Script-to-strategy promotion wizard", "Script notebook mode (multi-cell)", "Script library / import system", "Scheduled scripts and Alert API", "QuantScript parameter grid search API", "Live streaming data in scripts (v2)", "L3 x QuantScript bridge (L3.Simulate())", "Calibration quality report card", "Toxic flow tagging on fill tape", "L3 simulation replay visualizer", "Options queue model extension", "Symbol-partitioned collection (sharding)", "Leader-elected coordinator instance", "Cross-instance deduplication ledger (IDedupStore)", "Distributed backfill work queue", "Cluster health dashboard panel", "Distributed grid search (Track G x I)", "Cross-symbol correlation regime signals"], "ideas_count": 18, "track": "G-H-I", "notes": "First round of Track G-I brainstorm. Defined L3.Simulate() as highest-leverage cross-track bridge. IDedupStore as foundational Track I seam. Recommended sequencing: CalibrationReportCard -> ScriptLibrary -> L3Bridge -> GridSearch -> IDedupStore -> LeaderElection -> Sharding -> DistributedBackfill."}
 {"session_date": "2026-03-27", "mode": "Domain-Focused", "themes": ["Script debugger (step/watch/breakpoint)", "Script run history and result diffing", "Security Master access in QuantScript (Securities global)", "Script output export (PDF/Parquet/Excel/HTML)", "Script expression REPL", "Venue-specific L3 calibration profiles (VenueCalibrationPriors)", "TCA report: execution cost attribution", "Multi-day queue state continuity (carry-state)", "Dark pool / hidden liquidity estimator", "Zero-downtime rolling upgrade orchestration", "Geo-distributed collection by exchange timezone", "Split-brain detection and recovery"], "ideas_count": 12, "track": "G-H-I", "notes": "Second round of Track G-I brainstorm. TCA Report identified as highest-leverage institutional positioning item. VenueCalibrationPriors and SplitBrainDetector identified as platform bets. Script REPL flagged as surprise high-leverage small-effort item. Sequencing: REPL + SecurityMaster -> TCA Report -> RunHistory + VenueCalibration -> SplitBrain -> RollingUpgrade + DarkPool + GeoDistributed + Debugger + MultiDayContinuity."}
 {"session_date": "2026-06-25", "mode": "Domain-Focused", "themes": ["Provider Setup Wizard with Live Certification", "Hot-Reload Provider Re-Registration", "Credential Vault with Encrypted Persistence", "Runtime Failover Chain Editor", "Per-Provider Partial Config Mutation API", "Ingestion Session Continuity on Restart", "Provider Capability Browser in Data Workspace"], "ideas_count": 7, "document_updated": null, "notes": "Fresh domain covering runtime provider lifecycle management — an unexplored area in all prior sessions. Platform bets: Hot-Reload Re-Registration (ConfigWatcher already exists, ProviderRegistry.RegisterStreamingFactory already supports replace) and Per-Provider Partial Config Mutation (ConfigStore.PatchAsync primitive). Recommended sequence: Capability Browser (S) -> Partial Config API (M) -> Hot-Reload (M) -> Failover Editor (S) -> Setup Wizard (M) -> Credential Vault (M) -> Session Continuity (L)."}
+{"session_date": "2026-07-01", "mode": "Competitive / Open Exploration", "themes": ["live/paper TCA best-execution report pack", "Alpaca live broker adapter (IExecutionGateway)", "reconciliation break-resolution agent (MCP + CoS gates)", "custodian/broker statement connector library (IB Flex, OFX/CSV profiles)", "DuckDB analytics workbench + /api/query", "Python meridian client package (promoted)", "W6 backtesting studio evidence loop (manifest + run comparison)", "LEAN/NautilusTrader data-feed bridge", "governed investor report delivery portal-lite", "data-cost savings meter"], "ideas_count": 10, "document_updated": "docs/product/high-value-code-brainstorm-2026-07.md", "notes": "Market-researched prioritization session. Signals: TCA now mandatory infrastructure (~$2.8B market), Arcesium productizing Reconciliation Agent, LEAN BYO-data pain, Databento/Polygon pricing validates self-hosted economics. Sequencing: cost meter + TCA + IB Flex connector first; DuckDB -> Python package; Alpaca adapter feeding W7; W6 studio slice; recon agent after connector coverage."}
@@ -133,6 +133,7 @@
     <PackageVersion Include="Microsoft.CodeAnalysis.CSharp.Scripting" Version="5.3.0" />
     <PackageVersion Include="AvalonEdit" Version="6.3.1.120" />
     <PackageVersion Include="Dirkster.AvalonDock" Version="4.72.0" />
+    <PackageVersion Include="DuckDB.NET.Data.Full" Version="1.3.0" />
     <PackageVersion Include="Microsoft.Web.WebView2" Version="1.0.3179.45" />
     <PackageVersion Include="ScottPlot.WPF" Version="5.0.55" />
   </ItemGroup>

@@ -1766,6 +1766,7 @@ Meridian-main
 │   │   └── web-ui-development-pivot.md
 │   ├── product
 │   │   ├── deferred-expansion-boundaries.md
+│   │   ├── high-value-code-brainstorm-2026-07.md
 │   │   ├── implementation-todo-list.md
 │   │   ├── meridian-design-document.md
 │   │   └── README.md
@@ -3581,7 +3582,8 @@ Meridian-main
 │   │   │   ├── PositionLotSelector.cs
 │   │   │   ├── PositionReconciliationService.cs
 │   │   │   ├── PositionSyncOptions.cs
-│   │   │   └── ReplayDriftDetector.cs
+│   │   │   ├── ReplayDriftDetector.cs
+│   │   │   └── SessionTcaReporter.cs
 │   │   ├── TaxLotAccounting
 │   │   │   ├── ITaxLotSelector.cs
 │   │   │   ├── TaxLotAccountingMethod.cs
@@ -3974,6 +3976,7 @@ Meridian-main
 │   │   ├── Reconciliation
 │   │   │   ├── BrokerStatementInfrastructure.cs
 │   │   │   ├── BrokerStatementNormalizer.cs
+│   │   │   ├── IbFlexStatementService.cs
 │   │   │   └── ReconciliationCaseInfrastructure.cs
 │   │   ├── Resilience
 │   │   │   ├── HttpResiliencePolicy.cs
@@ -4482,6 +4485,8 @@ Meridian-main
 │   │   │   └── PortableDataPackager.Validation.cs
 │   │   ├── Policies
 │   │   │   └── JsonlStoragePolicy.cs
+│   │   ├── Query
+│   │   │   └── DuckDbQueryService.cs
 │   │   ├── Replay
 │   │   │   ├── JsonlReplayer.cs
 │   │   │   └── MemoryMappedJsonlReader.cs
@@ -4559,6 +4564,7 @@ Meridian-main
 │   │   │   ├── DataLineageService.cs
 │   │   │   ├── DataQualityScoringService.cs
 │   │   │   ├── DataQualityService.cs
+│   │   │   ├── DataReplacementCostEstimator.cs
 │   │   │   ├── EventBuffer.cs
 │   │   │   ├── FileMaintenanceService.cs
 │   │   │   ├── FilePermissionsService.cs
@@ -5017,6 +5023,8 @@ Meridian-main
 │   │   │   │   │   ├── data-screen.evidence-timeline.ts
 │   │   │   │   │   ├── data-screen.linked-context.ts
 │   │   │   │   │   ├── data-screen.operator-focus.ts
+│   │   │   │   │   ├── data-screen.query-panel.view-model.test.ts
+│   │   │   │   │   ├── data-screen.query-panel.view-model.ts
 │   │   │   │   │   ├── data-screen.security-master.ts
 │   │   │   │   │   ├── data-screen.test.tsx
 │   │   │   │   │   ├── data-screen.tsx
@@ -6707,6 +6715,7 @@ Meridian-main
 │   │   │   ├── PaperTradingPortfolioLotSnapshotTests.cs
 │   │   │   ├── PaperTradingPortfolioTests.cs
 │   │   │   ├── PositionLotSelectorTests.cs
+│   │   │   ├── SessionTcaReporterTests.cs
 │   │   │   └── TradierExecutionReconciliationTests.cs
 │   │   ├── FinancialOperations
 │   │   │   ├── AccountingClose
@@ -6956,6 +6965,7 @@ Meridian-main
 │   │   │   │   ├── statement-invalid-blockers.csv
 │   │   │   │   └── statement-unresolved-breaks.csv
 │   │   │   ├── BrokerCustodianMatchingPipelineTests.cs
+│   │   │   ├── IbFlexStatementServiceTests.cs
 │   │   │   ├── ReconciliationCaseServiceTests.cs
 │   │   │   ├── ReconciliationContractsTests.cs
 │   │   │   ├── StatementBreakClassifierTests.cs
@@ -7036,8 +7046,10 @@ Meridian-main
 │   │   │   ├── CompositeSinkTests.cs
 │   │   │   ├── DataLineageServiceTests.cs
 │   │   │   ├── DataQualityScoringServiceTests.cs
+│   │   │   ├── DataReplacementCostEstimatorTests.cs
 │   │   │   ├── DataValidatorTests.cs
 │   │   │   ├── DirectLendingMigrationTests.cs
+│   │   │   ├── DuckDbQueryServiceTests.cs
 │   │   │   ├── EventBufferTests.cs
 │   │   │   ├── ExportValidatorTests.cs
 │   │   │   ├── FilePermissionsServiceTests.cs

@@ -14,6 +14,9 @@ It routes non-technical audiences to verified evidence and prevents duplicate cl
   - [Meridian Implementation TODO List](implementation-todo-list.md) — single planning-tooling tracker for implemented design-document items and remaining TODOs
   - [Roadmap Registry](../roadmap/README.md)
   - [Roadmap Generated Summary](../roadmap/generated/ROADMAP_SUMMARY.md)
+  - [High-Value Code Brainstorm (2026-07)](high-value-code-brainstorm-2026-07.md) — market-researched
+    prioritization of the next highest-value implementable features, sequenced against the W6/W7
+    roadmap lanes
 - If you need evidence-backed examples of current operations, check:
   - [generated roadmap outputs](../roadmap/generated/)
   - Current project source-of-truth references listed below.