# Sprint Status - Entropyk
# Last Updated: 2026-03-29 (story 13-4 review fixes complete)
# Project: Entropyk
# Project Key: NOKEY
# Tracking System: file-system
# Story Location: _bmad-output/implementation-artifacts

# STATUS DEFINITIONS:
# ==================
# Epic Status:
#   - backlog: Epic not yet started
#   - in-progress: Epic actively being worked on
#   - done: All stories in epic completed
#
# Epic Status Transitions:
#   - backlog → in-progress: Automatically when first story is created (via create-story)
#   - in-progress → done: Manually when all stories reach 'done' status
#
# Story Status:
#   - backlog: Story only exists in epic file
#   - ready-for-dev: Story file created in stories folder
#   - in-progress: Developer actively working on implementation
#   - review: Ready for code review (via Dev's code-review workflow)
#   - done: Story completed
#
# Retrospective Status:
#   - optional: Can be completed but not required
#   - done: Retrospective has been completed
#
# WORKFLOW NOTES:
# ===============
# - Epic transitions to 'in-progress' automatically when first story is created
# - Stories can be worked in parallel if team capacity allows
# - SM typically creates next story after previous one is 'done' to incorporate learnings
# - Dev moves story to 'review', then runs code-review (fresh context, different LLM recommended)

generated: 2026-02-22
project: Entropyk
project_key: NOKEY
tracking_system: file-system
story_location: _bmad-output/implementation-artifacts

development_status:
  # Epic 1: Extensible Component Framework
  epic-1: done
  1-1-component-trait-definition: done
  1-2-physical-types-newtype-pattern: done
  1-3-port-and-connection-system: done
  1-4-compressor-component-ahri-540: done
  1-5-generic-heat-exchanger-framework: done
  1-6-expansion-valve-component: done
  1-7-component-state-machine: done
  1-8-auxiliary-transport-components: done
  1-11-flow-junctions-flowsplitter-flowmerger: done
  1-12-boundary-conditions-flowsource-flowsink: done
  epic-1-retrospective: optional

  # Epic 2: Fluid Properties Backend
  epic-2: done
  2-1-fluid-backend-trait-abstraction: done
  2-2-coolprop-integration-sys-crate: done
  2-3-tabular-interpolation-backend: done
  2-4-lru-cache-for-fluid-properties: done
  2-5-mixture-and-temperature-glide-support: done
  2-6-critical-point-damping-co2-r744: done
  2-7-incompressible-fluids-support: done
  2-8-rich-thermodynamic-state-abstraction: done
  epic-2-retrospective: optional

  # Epic 3: System Topology (Graph)
  epic-3: done
  3-1-system-graph-structure: done
  3-2-port-compatibility-validation: done
  3-3-multi-circuit-machine-definition: done
  3-4-thermal-coupling-between-circuits: done
  3-5-zero-flow-branch-handling: done
  3-6-hierarchical-subsystems-macrocomponents: done
  epic-3-retrospective: optional

  # Epic 4: Intelligent Solver Engine
  epic-4: done
  4-1-solver-trait-abstraction: done
  4-2-newton-raphson-implementation: done
  4-3-sequential-substitution-picard-implementation: done
  4-4-intelligent-fallback-strategy: done
  4-5-time-budgeted-solving: done
  4-6-smart-initialization-heuristic: done
  4-7-convergence-criteria-validation: done
  4-8-jacobian-freezing-optimization: done
  epic-4-retrospective: optional

  # Epic 5: Inverse Control & Optimization
  epic-5: in-progress
  5-1-constraint-definition-framework: done
  5-2-bounded-control-variables: done
  5-3-residual-embedding-for-inverse-control: done
  5-4-multi-variable-control: in-progress
  5-5-swappable-calibration-variables-inverse-calibration-one-shot: done
  5-6-control-variable-step-clipping-in-solver: review
  epic-5-retrospective: optional

  # Epic 6: Multi-Platform APIs
  epic-6: in-progress
  6-1-rust-native-api: done
  6-2-python-bindings-pyo3: done
  6-3-c-ffi-bindings-cbindgen: done
  6-4-webassembly-compilation: review
  6-5-cli-for-batch-execution: done
  6-6-python-solver-configuration-parity: done
  epic-6-retrospective: optional

  # Epic 7: Validation & Persistence
  epic-7: in-progress
  7-1-mass-balance-validation: done
  7-2-energy-balance-validation: done
  7-3-traceability-metadata: done
  7-4-debug-verbose-mode: done
  7-5-json-serialization-deserialization: in-progress
  7-6-component-calibration-parameters-calib: backlog
  7-7-ashrae-140-bestest-validation-post-mvp: backlog
  7-8-inverse-calibration-parameter-estimation: backlog
  epic-7-retrospective: optional

  # Epic 8: Component-Fluid Integration
  epic-8: done
  8-1-fluid-backend-component-integration: done
  1-9-air-coils-evaporatorcoil-condensercoil-post-mvp: done
  1-10-pipe-helpers-for-water-and-refrigerant: done
  epic-8-retrospective: optional

  # Epic 9: Coherence Corrections (Post-Audit)
  epic-9: done
  9-1-circuitid-type-unification: done
  9-2-fluidid-type-unification: done
  9-3-expansionvalve-energy-methods: done
  9-4-flowsourceflowsink-energy-methods: done
  9-5-flowsplitterflowmerger-energy-methods: done
  9-6-energy-validation-logging-improvement: done
  9-7-solver-refactoring-split-files: done
  9-8-systemstate-dedicated-struct: done
  epic-9-retrospective: optional

  # Epic 10: Enhanced Boundary Conditions
  # Refactoring of RefrigerantSource/BrineSource for typed fluid support
  # See: _bmad-output/planning-artifacts/epic-10-enhanced-boundary-conditions.md
  epic-10: in-progress
  10-1-new-physical-types: done
  10-2-refrigerant-source-sink: done
  10-3-brine-source-sink: done
  10-4-air-source-sink: done
  10-5-migration-deprecation: done
  10-6-python-bindings-update: backlog
  epic-10-retrospective: optional

  # Epic 11: Advanced HVAC Components
  epic-11: in-progress
  11-1-node-passive-probe: done
  11-2-drum-recirculation-drum: done
  11-3-floodedevaporator: done
  11-4-floodedcondenser: done
  11-5-bphxexchanger-base: done
  11-6-bphxevaporator: done
  11-7-bphxcondenser: done
  11-8-correlationselector: done
  11-9-movingboundaryhx-zone-discretization: done
  11-10-movingboundaryhx-cache-optimization: done
  11-11-vendorbackend-trait: done
  11-12-copeland-parser: done
  11-13-swep-parser: done
  11-14-danfoss-parser: done
  11-15-bitzer-parser: done
  epic-11-retrospective: optional

  # Epic 12: CLI Refactor & Advanced Components
  # Support for ScrewEconomizerCompressor, MCHXCondenserCoil, FloodedEvaporator
  # with proper internal state variables, CoolProp backend, and controls
  epic-12: in-progress
  12-1-cli-internal-state-variables: done
  12-2-cli-coolprop-backend: done
  12-3-cli-screw-compressor-config: done
  12-4-cli-mchx-condenser-config: done
  12-5-cli-flooded-evaporator-brine: done
  12-6-cli-control-constraints: done
  12-7-cli-output-json-metrics: done
  12-8-cli-batch-improvements: done
  epic-12-retrospective: optional

  # Epic 13: Rust API Enhancements
  # Extending SystemBuilder with multi-circuit, constraints, thermal couplings,
  # structured results, JSON config, and fluid backend assignment
  epic-13: in-progress
  13-1-systembuilder-multi-circuit: done
  13-2-systembuilder-port-validated-edges: done
  13-3-systembuilder-constraints-api: done
13-4-systembuilder-thermal-couplings: done
  13-5-simulation-result-structured: ready-for-dev
  13-6-json-config-serialize: ready-for-dev
  13-7-fluid-backend-assignment: ready-for-dev
  epic-13-retrospective: optional

  # Epic 14: Free Cooling & Advanced Pump Control
  # Native free cooling simulation with automatic mode switching, pump sequencing, and energy optimization
  # See: _bmad-output/planning-artifacts/epic-12-free-cooling-pump-control.md
  epic-14: in-progress
  14-1-freecoolingexchanger-component: in-progress
  14-2-automatic-mode-switching-logic: backlog
  14-3-pumpcontroller-optimal-sequencing: backlog
  14-4-variable-frequency-drive-vfd-optimization: backlog
  14-5-bypass-valve-control: backlog
  14-6-safety-interlocks-protection: backlog
  14-7-control-configuration-serialization: backlog
  14-8-python-api-advanced-control: backlog
  epic-14-retrospective: optional

  # Epic 15: CLI — Complete Component Coverage
  # Every Rust component must be usable from JSON config
  # See: _bmad-output/implementation-artifacts/15-*
  epic-15: in-progress
  15-1-cli-real-compressor: done
  15-2-cli-real-expansion-valve: done
  15-3-cli-real-pump: done
  15-4-cli-bphx-exchangers: review
  15-5-cli-flooded-condenser: backlog
  15-6-cli-drum: backlog
  15-7-cli-economizer: backlog
  15-8-cli-flow-splitter-merger: backlog
  15-9-cli-boundary-conditions: done
  15-10-cli-real-pipe: backlog
  15-11-cli-real-fan: backlog
  15-12-cli-bypass-valve: backlog
  15-13-cli-node-probe: backlog
  epic-15-retrospective: optional

  # Epic 16: CLI — Features & Output
  # Calibration, structured output, multi-fluid, vendors, templates, sweep
  # See: _bmad-output/implementation-artifacts/16-*
  epic-16: backlog
  16-1-cli-calib-config: backlog
  16-2-cli-structured-output: backlog
  16-3-cli-multi-fluid: backlog
  16-4-cli-vendor-import: backlog
  16-5-cli-json-schema: backlog
  16-6-cli-machine-templates: backlog
  16-7-cli-parameter-sweep: backlog
  epic-16-retrospective: optional

  # Epic 17: Python Bindings — Complete Component & Feature Parity
  # Expose all Rust components and features to Python via PyO3
  # See: _bmad-output/implementation-artifacts/17-*
  epic-17: backlog
  17-1-python-fix-pump: backlog
  17-2-python-fix-fan: backlog
  17-3-python-screw-compressor: backlog
  17-4-python-mchx-condenser: backlog
  17-5-python-flooded-hx: backlog
  17-6-python-bphx-exchangers: backlog
  17-7-python-drum: backlog
  17-8-python-boundary-conditions: backlog
  17-9-python-multi-circuit: backlog
  17-10-python-calib-results: backlog
  17-11-python-bypass-coils: backlog
  17-12-python-vendor-parsers: backlog
  17-13-python-macro-snapshot: backlog
  epic-17-retrospective: optional

  # Epic 18: WebAssembly — Full Component Coverage
  # Make WASM bindings usable for JS/TS frontend development
  # See: _bmad-output/implementation-artifacts/18-*
  epic-18: backlog
  18-1-wasm-finalize-compilation: backlog
  18-2-wasm-all-components: backlog
  18-3-wasm-multi-circuit: backlog
  18-4-wasm-calib-results: backlog
  18-5-wasm-vendor-data: backlog
  epic-18-retrospective: optional

  # Epic 19: Calibration & Validation
  # Inverse calibration, Eurovent reporting, ASHRAE validation
  # See: _bmad-output/implementation-artifacts/19-*
  epic-19: backlog
  19-1-inverse-calibration: backlog
  19-2-eurovent-reporting: backlog
  19-3-ashrae-bestest: backlog
  epic-19-retrospective: optional