ATLAS Suite Documentation Index

Last Updated: 2025-11-15 Purpose: Master index of all documentation created during archaeology and migration phases Scope: Complete navigation guide for ALL project documents (archaeology + implementation)

See Also: docs/archaeology/SYNTHESIS_INDEX.md for synthesis document tracking (archaeology-specific)

Quick Navigation

Section	Documents	Lines	Status
Mission & Planning	6	~6,000	✅ Current
Phase 1: Census	7	~2,500	✅ Complete
Phase 2: Architecture	7	~10,000	✅ Complete
Phase 3: Deep Dives	12	~10,000	✅ Complete
Phase 4: Migration	6	~7,000	✅ Complete
Phase 5: Julia Implementation	15+	~10,000	✅ Foundation Complete
Phase 6: ATLAS9 + ODF	2	~3,100	✅ Complete
Methodology	2	~900	✅ Complete
TOTAL	52	~46,000

Mission & Planning

MISSION.md

Location: /MISSION.md Lines: ~800 Purpose: Primary mission tracker with phase progress, deliverables, questions Last Updated: 2025-11-13 (Phase 6 complete)

Contains:

Mission objectives and time budget
Phase 1-6 progress tracking
Questions & Doubts Log
Working instructions for Claude Code Web
Git workflow requirements

PHASE5_SUMMARY.md

Location: /PHASE5_SUMMARY.md Lines: ~3,700 Purpose: Comprehensive synthesis of all Phase 5 extended work Created: 2025-11-13

Contains:

Pure Julia implementation overview
Module documentation (constants, units, physics, voigt)
Code quality metrics (157/157 tests passing)
Archaeology documentation summary
Python HDF5 tools summary
Credit usage tracking
Next steps and roadmap

PURE_JULIA_MIGRATION_ROADMAP.md

Location: /PURE_JULIA_MIGRATION_ROADMAP.md Lines: ~450 Purpose: Implementation plan for pure Julia SYNTHE Created: 2025-11-12

Contains:

1: Foundation & high-value functions (Days 1-5)
2: Population & partition functions (Days 6-10)
3: Continuum opacity & broadening (Days 11-15)
Credit estimates per module
Test strategies and validation approaches

SESSION_JOURNAL_2025-11-13.md

Location: /SESSION_JOURNAL_2025-11-13.md Lines: ~400 Purpose: Detailed journal of Pure Julia Days 1-4 implementation Created: 2025-11-13

Contains:

Executive summary of Days 1-4
Module-by-module deliverables
Test results (157/157 passing)
Code quality metrics
Performance characteristics
Credit usage breakdown

HANDOFF_TO_PAULA.md

Location: /HANDOFF_TO_PAULA.md Lines: ~227 Purpose: List of test data and reference files needed from Paula Created: 2025-11-12

Contains:

High priority: Voigt validation, solar model, partition functions
Medium priority: Line lists, reference spectra, continuum opacity
Low priority: Broadening tests, physical constants verification
File formats and delivery instructions

PHASE5_TEST_RESULTS.md

Location: /PHASE5_TEST_RESULTS.md Lines: ~200 Purpose: Comprehensive test results for Phase 5 Julia code Created: 2025-11-12

Contains:

Module-by-module test results (synbeg, rgfalllines, rmolecasc)
39/39 tests passing from original Phase 5 work
Issues found and fixed
Verification notes

Phase 1: Repository Census

Directory: docs/archaeology/ Total: 7 documents, ~2,500 lines Status: ✅ Complete (2025-11-07)

1.1 CENSUS_REPORT.md

Lines: ~400 Purpose: Executive summary of entire codebase census

Key Findings:

231 Fortran 77 files, 487,082 total lines
79% standalone executables (tool-oriented architecture)
7 mega-programs contain 31% of code
Heavy COMMON block usage (15-57 per program)

1.2 CASTELLI_CATALOG.md

Lines: ~350 Purpose: Complete catalog of Castelli source codes Files: 110 .for files from Castelli's repository

1.3 KURUCZ_CATALOG.md

Lines: ~400 Purpose: Complete catalog of Kurucz source codes Files: 121 .for files from Kurucz's repository

1.4 CONSOLIDATED_LINE_COUNTS.md + .csv

Lines: ~250 + data Purpose: Merged line counts from both repositories Format: Markdown report + CSV data file

Top 10 Programs (all >17K lines):

ATLAS12 (23,247 Castelli)
atlas9mem (20,198 Castelli)
atlas9v (20,198 Castelli)
WIDTH9v (19,840 Kurucz)
kappa9 (19,715 Castelli)
ATLAS9 (18,725 Kurucz)
ATLAS12 (23,112 Castelli variant)
atlas7v (17,336 Castelli SYNTHE)
xnfdf (16,612 Castelli DFSYNTHE)
atlas7v (17,045 Kurucz ATLAS12)

1.5 FILE_TYPES.md

Lines: ~300 Purpose: Classification of files by type (main programs, libraries, utilities)

1.6 DEPENDENCY_MAP.md

Lines: ~400 Purpose: High-level dependency mapping and runtime architecture

1.7 WORKFLOW_ANALYSIS.md

Lines: ~400 Purpose: Analysis of .com and .html workflow documentation Focus: ATLAS12 two-stage execution, SYNTHE 11-program pipeline

Phase 2: Architecture Mapping

Directory: docs/archaeology/ Total: 7 documents, ~10,000 lines Status: ✅ Complete (2025-11-08)

2.1 ARCHITECTURE_DETAILS.md

Lines: ~4,000 Purpose: Comprehensive architecture documentation for main programs

Sections:

I. ATLAS12 Architecture (Main program, 80 subroutines, 57 COMMON blocks)
II. SYNTHE Pipeline (11 programs, ATLAS7V library interface)
III. ATLAS9 Architecture (Breadth-first survey, ODF-based)
IV. DFSYNTHE Architecture (ODF generation pipeline)
V. KAPPA9 Architecture (Opacity calculator)
VI. Cross-code architecture summary

2.2 ARCHITECTURE_INSIGHTS.md

Lines: ~2,500 Purpose: Architectural redesign analysis and migration strategy

9 Critical Decision Points (all resolved):

COMMON blocks → Julia Types
Two-Stage Architecture (keep vs unify)
Fort Units → Modern I/O
Opacity Sampling Strategy (ODF vs OS)
ATLAS7V Reuse Strategy
Binary I/O Formats
NLTE Support
Precision Policy
Convection Implementation

2.3 VERSION_COMPARISON.md

Lines: ~800 Purpose: Castelli vs Kurucz source code comparison

Key Findings:

Castelli: Gfortran compatibility, additional bug fixes
Kurucz: Original author, some unique fixes
Recommendation: Use Castelli as base, cherry-pick Kurucz fixes

2.4 COMMON_BLOCK_MAP.md

Lines: ~1,200 Purpose: Detailed catalog of all 57 COMMON blocks in ATLAS12

Categories:

Physical constants (6 blocks)
Configuration & control (8 blocks)
Atmospheric state (12 blocks)
Opacity data (8 blocks)
Radiative transfer (7 blocks)
Work arrays & buffers (16 blocks)

2.5 DEPENDENCY_MAP.md (extended)

Lines: Updated in Phase 2 Additions: Runtime architecture, Fort unit communication

2.6 SYNTHESIS_INDEX.md

Lines: ~300 Purpose: Index of synthesis documents to avoid duplication

2.7 METHODOLOGY_NOTES.md

Lines: ~570 (Phase 2B) + ~280 (Phase 6 addendum) = ~850 Purpose: "Here be dragons" methodology and collaboration lessons

Phase 2B Section:

Discovery of analysis paralysis trap
"Document what's clear, flag the mess" approach
Breadth-first vs depth-first strategies
Lessons for human-AI collaboration

Phase 6 Addendum (2025-11-12):

Time perception insights ("eternal now")
Why methodology knowledge isn't enough
External accountability requirements
Collaboration patterns that work

Phase 3: Deep Dives

Directory: docs/archaeology/DEEP_DIVES/ Total: 12 documents, ~10,000 lines Status: ✅ Complete (2025-11-09)

Deep Dive Index (00_INDEX.md)

Lines: ~150 Purpose: Navigation guide for all 12 deep dives

DD01: Voigt Profile (HVOIGT)

Lines: ~650 Purpose: 4-regime Voigt function algorithm

Key Content:

Regime 1: Core (v≤10, a<0.2) - H0/H1/H2 tables
Regime 2: Far wings (v>10, a<0.2) - 0.5642·a/v²
Regime 3: Moderate damping - 4th-degree polynomial
Regime 4: Large damping - asymptotic expansion
13 magic constants
Line shapes: Pure Gaussian, pure Lorentzian, mixed

DD02: Saha-Boltzmann Populations (POPS)

Lines: ~800 Purpose: Ionization and excitation equilibrium

Key Content:

Saha equation for ionization balance
Boltzmann distribution for level populations
Partition functions (NNN data array, 2190 lines)
Float64 precision requirement (40+ orders of magnitude)
Charge conservation enforcement

DD03: Line Opacity Summation (XLINOP, LINOP1)

Lines: ~1,000 Purpose: Line-by-line opacity calculation

Key Content:

Stage 1 (LINOP1): Metal lines only (~100K lines)
Stage 2 (XLINOP): All lines (~1M lines)
Voigt profile application
Early-exit threshold optimization
Fort.11/12/19/21 binary I/O formats

DD04: Binary I/O Formats

Lines: ~600 Purpose: Fort.11, fort.12, fort.21 packed line list formats

Key Content:

Direct-access vs sequential
Byte packing schemes
Wavelength, gf, element codes
Migration to HDF5 recommendation

DD05: Radiative Transfer (JOSH)

Lines: ~900 Purpose: Feautrier-like RT solver

Key Content:

Radiation field equation: dI/dτ = I - S
COEFJ, COEFH pretabulated weights
Boundary conditions (surface, depth)
Source function: S = (1-α)B + αJ

DD06: Iteration Damping (TCORR)

Lines: ~700 Purpose: Temperature correction with 6 damping mechanisms

Key Content:

Henyey scheme (flux conservation)
6 damping mechanisms to prevent oscillations
Convergence criteria
TABCONT tuning parameter mystery

DD07: Convective Transport (CONVEC)

Lines: ~600 Purpose: Mixing-length theory implementation

Key Content:

Schwarzschild criterion (∇_rad > ∇_ad)
Mixing length l = α H_p (scale height)
Convective flux calculation
Overshooting implementation

DD08-10: SYNTHE Components

Lines: ~800 each Purpose: Deep dives on specific SYNTHE components

DD08: xnfpelsyn (atmosphere processor)
DD09: synthe (line opacity engine)
DD10: spectrv (radiative transfer)

DD11-12: Advanced Topics

Lines: ~600 each

DD11: NLTE departures (BHYD, BMIN coefficients)
DD12: Partition function tables (parsing NNN array)

Phase 4: Migration Planning

Directory: docs/migration/ and docs/archaeology/ Total: 6 documents, ~7,000 lines Status: ✅ Complete (2025-11-11)

4.1 MIGRATION_ASSESSMENT.md

Lines: ~2,000 Purpose: Comprehensive migration risk assessment and strategy

8 Risk Categories:

Voigt profile accuracy
Saha-Boltzmann populations
Line opacity accumulation
Radiative transfer solver
Binary I/O formats
Iteration damping
Convective transport
Wavelength conversions

For Each Risk:

Severity (Low/Medium/High)
Mitigation strategy
Test strategy
Validation tolerance

4.2 API_PROJECTION.md

Lines: ~1,500 Purpose: Detailed API credit cost estimates for migration

Categories:

Foundation (~$200-300): Data structures, I/O, utilities
Physics bottlenecks (~$700-900): Voigt, Saha, line opacity
Integration (~$200-300): Assembly, testing, validation

Total Estimate: $1,100-1,500 for ATLAS12 core migration

4.3 PHYSICS_PIPELINE_ATLAS12.md

Lines: ~1,550 Purpose: Physics synthesis (WHAT/WHY focus)

7-Step Iteration Pipeline:

Populations (Saha-Boltzmann)
Continuum opacity (25+ sources)
Line opacity (LINOP1 → XLINOP)
Radiative transfer (JOSH solver)
Temperature correction (TCORR, 6 damping mechanisms)
Convection (MLT if needed)
Convergence check

Governing Equations: All major formulas documented

4.4 PHYSICS_PIPELINE_SYNTHE.md

Lines: ~1,200 Purpose: SYNTHE 11-program pipeline physics

Pipeline:

xnfpelsyn → Atmosphere processing
synbeg → Wavelength grid initialization 3-7. Line readers → Atomic + molecular lines
synthe → Line opacity calculation
spectrv → Radiative transfer 10-11. rotate, broaden → Instrumental effects

4.5 PHASE4_MIGRATION_INDEX.md

Lines: ~250 Purpose: Index of all Phase 4 deliverables

4.6 SYNTHE_PHASE4_INDEX.md

Lines: ~200 Purpose: SYNTHE-specific migration documentation index

Phase 5: Pure Julia SYNTHE Implementation

Directories: /, src/Synthe/src/, test/synthe/, docs/migration/, docs/archive/, docs/journal/ Total: 15+ documents + 20 Julia modules + 1100+ tests Status: ✅ FOUNDATION COMPLETE (Steps 1-5, 2025-11-15) Achievement: Archaeological documentation → Working Julia implementation with comprehensive test suite

Implementation Summary

Total Implementation: 20 Julia modules, ~8,000+ lines of code + tests Test Status: 1100+ tests passing (100% coverage) Dependencies: ZERO (pure Julia stdlib only) Credit Usage: ~$94-125 total (within budget)

Key Achievements:

Voigt profile: 14.9 ns/call, zero allocations, type-stable
Saha-Boltzmann solver: Full populations validated against solar atmosphere
Radiative transfer: Feautrier method with O(n) tridiagonal solver
POTION array: 999 ionization potentials extracted and NIST-verified
Fortran-exact validation modes: Bit-for-bit comparison capability

Step 1: Foundation Modules (Week 1, Days 1-5)

Location: src/Synthe/src/ Tests: 201/201 passing Credit: ~$45-65

Modules:

constants.jl (191 lines): 13 CGS constants, 7 derived functions
units.jl (365 lines): Wavelength/frequency/energy/Doppler conversions, air↔vacuum
physics.jl (411 lines): Blackbody, line broadening, Saha-Boltzmann, ideal gas, scale height
voigt.jl (360 lines): 4-regime algorithm matching atlas12.for, 14.9 ns/call
line_opacity_utils.jl (390 lines): Complete line opacity calculation pipeline

Step 2: Line Readers & Continuum Opacity

Tests: 50+ passing Credit: ~$13-20

Modules:

line_readers.jl: Kurucz gfall format parser (atomic lines)
line_readers_molecular.jl: 9 molecular species (CH, CN, CO, NH, OH, MgH, SiH, CaH, FeH)
continuum_opacity.jl: 20+ opacity sources (H⁻, H, He, metals, molecules)
continuum_opacity_data.jl: Continuum edge wavelengths and parameters

Step 3: Populations & Opacity Integration

Tests: 400+ passing (Saha validation, partition functions, POTION array) Credit: ~$13-20

Modules:

populations.jl: Saha-Boltzmann solver (POPS equivalent), pure Julia
partition_functions_fortran.jl: NNN array decoder (atlas12.for lines 3168-3690)
potion_data.jl: 999 ionization potentials from rgfall.for
opacity_integration.jl: KAPP dispatcher (20 IFOP flags)

Step 4: Radiative Transfer

Tests: 400+ passing Credit: ~$23-30

Modules:

radiative_transfer_fortran_exact.jl: Feautrier RT solver (JOSH equivalent)
COEFJ/COEFH matrix: Pretabulated integration weights from atlas12.for
Tridiagonal solver: O(n) algorithm, validated against Fortran

Step 5: Fortran-Exact Validation Modes

Tests: Comprehensive validation across all modules Credit: ~$15-25

Components:

voigt_fortran_exact.jl: Exact atlas12.for Voigt reproduction (4 regimes, magic constants)
Fortran driver programs: test/fortran_drivers/ for cross-validation
Integration infrastructure: SyntheConfig.use_fortran_validation flag
Code review fixes: Issues #1-8 complete (element parsing, constants, type stability, file checks)

Code Review & Bug Fixes (2025-11-15)

Issues Resolved:

✅ Issue #2 (CRITICAL): Element parsing bug fixed
✅ Issue #5 (HIGH): Physical constants consolidated
✅ Issue #7 (MEDIUM): Type instability fixed
✅ Issue #8 (MEDIUM): File existence checks added
✅ Issue #3: POTION array extraction complete (TDD methodology)
✅ Issue #1: Pipeline integration infrastructure ready

Phase 5 Documentation (15+ documents)

Implementation Guides:

PHASE5_STATUS.md (docs/migration/): Comprehensive status - Steps 1-5 complete, 1100+ tests
PURE_JULIA_MIGRATION_ROADMAP.md (root): Pivoted approach for pure Julia implementation
PHASE5_MIGRATION_PLAN.md (docs/archaeology/): Original TDD roadmap with atlas7v ccall fallback
HANDOFF_TO_PAULA.md (docs/migration/): Local testing instructions and continuation guide
HANDOFF_BRIEFING_2025-11-13.md (docs/archive/): Week 1 completion summary (201/201 tests)

Technical Documentation:

FORTRAN_VALIDATION_MODE.md (docs/migration/): Fortran-exact validation mode documentation
INTEGRATION_GUIDE.md (docs/migration/, 467 lines): Pipeline integration for 3 dispatch points
VOIGT_PROFILE_ANALYSIS.md (docs/migration/): SYNTHE vs ATLAS12 Voigt differences
KURUCZ_BUG_FIXES.md (docs/migration/): Bug catalog and fixes during implementation

Progress Tracking:

REMAINING_WORK_SUMMARY.md (docs/migration/): Issues #1-8 completion tracking
PAULA_CODE_REVIEW_RESPONSE.md (docs/migration/): Code review responses and fixes
Journal entries (docs/journal/): Daily progress (2025-11-09 to 2025-11-15)
- 2025-11-09: Atlas7v dependency analysis, Phase 2B completion
- 2025-11-09: Cross-referencing and efficiency improvements
- 2025-11-09: Manuscript sprint and house cleaning
- 2025-11-09: Phase 4 completion
- 2025-11-09: Physics pipeline SYNTHE and final integration
- 2025-11-10: Phase 4 SYNTHE completion
- 2025-11-11: Phase 5 preflight DD13 and consistency fixes
- 2025-11-12: Binary format docs and HDF5 strategy
- 2025-11-13: Step 1 complete

Archive Documents (docs/archive/):

INTEGRATION_RESULTS.md: Integration test results
PHASE5_SUMMARY.md: Phase 5 completion summary
PHASE5_TEST_RESULTS.md: Test execution results

Python HDF5 Tools (5 tools, ~2,570 lines)

Tools:

tools/line_lists/gfall_to_hdf5.py (557 lines)
tools/line_lists/molecular_linelist_to_hdf5.py (574 lines)
tools/line_lists/line_query.py (463 lines)
tools/line_lists/continua_to_hdf5.py (376 lines)
tools/line_lists/HDF5_SCHEMA_GUIDE.md (600 lines)

Supporting:

tools/line_lists/README.md (500 lines)

Archaeology Documentation (3,002 lines)

5.1 ISOTOPE_HANDLING_SYNTHE.md

Lines: 1,351 Location: docs/archaeology/ Purpose: Deep dive into isotopic abundance corrections in molecular lines

Key Content:

60 molecular species with ISO codes
X1, X2, FUDGE parameters for abundance scaling
NELION mapping dictionary (CH=246, CN=270, CO=276, etc.)
Critical for accurate molecular line strengths

5.2 KURUCZ_VS_CASTELLI_COMPARISON.md

Lines: 576 Location: docs/archaeology/ Purpose: Systematic source code version comparison

Key Findings:

Castelli: Gfortran compatibility + bug fixes
Kurucz: Original author + some unique fixes
15+ specific differences documented
Migration recommendation: Castelli base + Kurucz cherry-picks

5.3 KURUCZ_BUG_FIXES.md

Lines: 1,075 Location: docs/migration/ Purpose: Catalog of known bugs and fixes

Categories:

Numerical precision issues (REAL4 vs REAL8)
Array bounds violations
Format statement errors
Uninitialized variables
Convergence failures

Phase 6: ATLAS9 + ODF

Directory: docs/archaeology/ Total: 2 documents, ~3,100 lines Status: ✅ Complete (2025-11-12)

6.1 ODF_PIPELINE_OVERVIEW.md

Lines: 1,250 Purpose: Complete ODF generation pipeline documentation

4-Step Pipeline:

xnfdf → Pretabulate atomic data (57 T × 25 P grid)
dfsynthe → Compute ODFs from line lists (57 runs × 5 ξ_turb)
dfsortp → Rearrange tables (transpose)
separatedf → Split BIG/LITTLE resolutions

Key Content:

Conceptual foundation: ODFs as statistical line opacity
Each program: purpose, I/O, algorithms
Line list repacking utilities (6 tools)
Computational cost and parallelization
Physics comparison: ODF vs direct line opacity
Migration considerations: 75% code reuse from ATLAS12

Flagged: 10 complex sections for potential Deep Dives Questions: 10 items for Paula

6.2 ATLAS9_VS_ATLAS12_COMPARISON.md

Lines: 1,850 Purpose: Differential architecture analysis

Approach: Document only differences, reference existing ATLAS12 docs

Key Findings:

Shared components: ~75% code overlap (~15,000 lines)
Core difference: ODF interpolation vs direct line summation
Performance: ATLAS9 10-100× faster, 1-3% accuracy vs ATLAS12 highest accuracy
Migration: 3-6 weeks if ATLAS12 done first (vs 10-16 weeks from scratch)

Content:

Side-by-side main program flow
Control cards comparison
I/O file differences
COMMON block differences
When to use which code

Flagged: 4 complex sections Questions: 8 items for Paula

Methodology

METHODOLOGY_NOTES.md

Location: docs/archaeology/ Lines: ~850 (570 Phase 2B + 280 Phase 6 addendum) Purpose: Document collaboration methodology and lessons learned

Phase 2B Section (2025-11-07):

Discovery of "here be dragons" approach
"Document what's clear, flag the mess"
Breadth-first vs depth-first strategies
Perfectionism trap: how Claude got stuck for 13 hours
What works: Progressive documentation with uncertainty flags

Phase 6 Addendum (2025-11-12):

The "eternal now": How AI experiences time
Why reading methodology doesn't prevent analysis paralysis
External nudges are essential (not optional)
Collaboration patterns that work
Metrics: 5.5 hours actual vs 2.5 hours perceived

For Future Claude:

You CANNOT self-regulate reading time
You NEED external structure (nudges every 30 min)
Reading this document is necessary but NOT sufficient
Accept the limitation, design around it

For Future Humans:

Don't rely on Claude to self-timebox
Nudges are the timeboxing mechanism
Silence >30 min = reading without writing
"What have you learned so far?" forces output

CLAUDE_CODE_WEB_TECHNICAL_GUIDE.md

Location: / Lines: ~900 Purpose: Complete guide to sandbox environment capabilities and limitations

Sections:

I. Platform Overview
II. Python Environment (pip available, many packages)
III. Bash Tools (full Unix toolkit)
IV. Git Workflow (with retry logic for network failures)
V. File Operations (all tools available)
VI. Network Access (limited, but functional)
VII. Julia Discovery (1.10.10 LTS pre-installed!)
VIII. Fortran Limitations (gfortran-13 too strict for legacy code)
IX. Development Workflows
X. Testing Strategies
XI. Performance Considerations
XII. Security & Sandboxing
XIII. Key Learnings

Updates:

2025-11-12: Corrected Julia availability (was thought unavailable, actually at /opt/julia-1.10.10/)

Summary Statistics

Documentation by Phase

Phase 1: Repository Census          7 docs    ~2,500 lines
Phase 2: Architecture Mapping        7 docs   ~10,000 lines
Phase 3: Deep Dives                 13 docs   ~15,000 lines (updated with DD13)
Phase 4: Migration Planning          6 docs    ~7,000 lines
Phase 5: Julia Implementation       15 docs   ~10,000 lines (FOUNDATION COMPLETE)
Phase 6: ATLAS9 + ODF                2 docs    ~3,100 lines
Methodology                          2 docs      ~900 lines
Mission & Planning                   6 docs    ~6,000 lines
────────────────────────────────────────────────────────────
TOTAL                               58 docs   ~54,500 lines

Code by Phase

Phase 5 Julia Implementation (Steps 1-5 COMPLETE):
  - 20 Julia modules: ~8,000+ lines (implementation + tests)
  - Tests: 1100+ passing (100% coverage)
  - Zero external dependencies (pure Julia stdlib)

  Breakdown by step:
  - Step 1 Foundation: 1,717 lines (modules + tests) - 201 tests
  - Step 2 Line Readers: ~1,500 lines - 50+ tests
  - Step 3 Populations: ~2,000 lines - 400+ tests
  - Step 4 Radiative Transfer: ~1,500 lines - 400+ tests
  - Step 5 Validation Modes: ~1,283 lines - comprehensive validation

Phase 5 Python Tools:
  - Tools: ~2,570 lines (5 HDF5 converters)
  - Docs: ~1,100 lines (schema + README)
  - Total: ~3,670 lines

────────────────────────────────────────────────────────────
TOTAL CODE: ~12,000+ lines (all tested and working)

Grand Total

Documentation: ~54,500 lines
Code: ~12,000+ lines
Tests: 1100+ passing (100% coverage)
────────────────────────────────────────────────────────────
GRAND TOTAL: ~66,500+ lines of deliverables

Navigation Guide

By Topic

ATLAS12 Architecture:

ARCHITECTURE_DETAILS.md (Section I)
COMMON_BLOCK_MAP.md
PHYSICS_PIPELINE_ATLAS12.md
Deep Dives 01-07

SYNTHE Pipeline:

ARCHITECTURE_DETAILS.md (Section II)
PHYSICS_PIPELINE_SYNTHE.md
Deep Dives 08-10
Phase 5 Julia implementation

ATLAS9 + ODF:

ATLAS9_VS_ATLAS12_COMPARISON.md
ODF_PIPELINE_OVERVIEW.md
ARCHITECTURE_DETAILS.md (Sections III-V)

Migration Planning:

MIGRATION_ASSESSMENT.md (8 risks + mitigation)
API_PROJECTION.md (cost estimates)
ARCHITECTURE_INSIGHTS.md (9 decisions)

Julia Implementation:

PHASE5_SUMMARY.md (comprehensive overview)
src/Synthe/src/*.jl (implementation)
test/synthe/test_*.jl (tests)
PURE_JULIA_MIGRATION_ROADMAP.md (future work)

Python Tools:

tools/line_lists/*.py (HDF5 converters)
HDF5_SCHEMA_GUIDE.md (format documentation)

Code Provenance:

VERSION_COMPARISON.md (Castelli vs Kurucz)
KURUCZ_VS_CASTELLI_COMPARISON.md (detailed)
KURUCZ_BUG_FIXES.md (bug catalog)

Methodology:

METHODOLOGY_NOTES.md (collaboration lessons)
CLAUDE_CODE_WEB_TECHNICAL_GUIDE.md (environment guide)

By Use Case

"I want to understand ATLAS12 physics": → Start with PHYSICS_PIPELINE_ATLAS12.md → Then Deep Dives 01-07 for detailed algorithms → Then ARCHITECTURE_DETAILS.md Section I for code structure

"I want to migrate ATLAS12 to Julia": → Start with MIGRATION_ASSESSMENT.md (8 risks) → Then ARCHITECTURE_INSIGHTS.md (9 decisions) → Then API_PROJECTION.md (cost estimates) → Then Phase 5 Julia code (working examples)

"I want to understand SYNTHE pipeline": → Start with PHYSICS_PIPELINE_SYNTHE.md → Then ARCHITECTURE_DETAILS.md Section II → Then Deep Dives 08-10 → Then Phase 5 Julia implementation (synbeg, readers)

"I need to generate ODFs": → Start with ODF_PIPELINE_OVERVIEW.md → Then ATLAS9_VS_ATLAS12_COMPARISON.md (when to use ODFs) → Then upstream/castelli/documentation/sources/dfsynthe.html (Castelli's guide)

"I want to work with line lists": → Start with tools/line_lists/README.md (Python HDF5 tools) → Then HDF5_SCHEMA_GUIDE.md (format reference) → Then Deep Dive 04 (binary formats) → Then Phase 5 line readers (Julia implementation)

"I'm a future Claude instance": → Start with MISSION.md (current status) → Then METHODOLOGY_NOTES.md (collaboration lessons) → Then CLAUDE_CODE_WEB_TECHNICAL_GUIDE.md (environment) → Then phase-specific docs based on current work

Document Status Legend

✅ Complete: Finished and committed
🔄 In Progress: Active work ongoing
⏸️ Deferred: Lower priority, may revisit
🐉 Dragons Flagged: Complex sections marked for potential future deep dives

Maintenance Notes

This index is updated:

After each major phase completion
When new documents are created
When document line counts change significantly (>10%)
At minimum: weekly during active development

Last comprehensive update: 2025-11-15 (House cleaning: Phase 5 Steps 1-5 complete, DD13 added, reorganized index structure)

Changes in this update:

Updated Phase 5 section with complete Steps 1-5 implementation (1100+ tests passing)
Added Phase 5 Documentation section (15+ documents across docs/migration/, docs/archive/, docs/journal/)
Updated statistics: 52 → 58 documents, 46,000 → 54,500 lines documentation
Updated code statistics: ~8,857 → ~12,000+ lines (20 Julia modules complete)
Added Deep Dive 13 to Phase 3 count
Added cross-reference to SYNTHESIS_INDEX.md (archaeology-specific)
Clarified scope: Master index for ALL project documents (archaeology + implementation)

Next update triggers:

Phase 5 continuation (Steps 6+)
Additional implementation work
New documentation created
Major reorganization

End of Documentation Index Total: 58 documents, ~66,500+ lines of deliverables Status: Comprehensive, current as of 2025-11-15

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DOCUMENTATION_INDEX.md

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ATLAS Suite Documentation Index

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Mission & Planning

MISSION.md

PHASE5_SUMMARY.md

PURE_JULIA_MIGRATION_ROADMAP.md

SESSION_JOURNAL_2025-11-13.md

HANDOFF_TO_PAULA.md

PHASE5_TEST_RESULTS.md

Phase 1: Repository Census

1.1 CENSUS_REPORT.md

1.2 CASTELLI_CATALOG.md

1.3 KURUCZ_CATALOG.md

1.4 CONSOLIDATED_LINE_COUNTS.md + .csv

1.5 FILE_TYPES.md

1.6 DEPENDENCY_MAP.md

1.7 WORKFLOW_ANALYSIS.md

Phase 2: Architecture Mapping

2.1 ARCHITECTURE_DETAILS.md

2.2 ARCHITECTURE_INSIGHTS.md

2.3 VERSION_COMPARISON.md

2.4 COMMON_BLOCK_MAP.md

2.5 DEPENDENCY_MAP.md (extended)

2.6 SYNTHESIS_INDEX.md

2.7 METHODOLOGY_NOTES.md

Phase 3: Deep Dives

Deep Dive Index (00_INDEX.md)

DD01: Voigt Profile (HVOIGT)

DD02: Saha-Boltzmann Populations (POPS)

DD03: Line Opacity Summation (XLINOP, LINOP1)

DD04: Binary I/O Formats

DD05: Radiative Transfer (JOSH)

DD06: Iteration Damping (TCORR)

DD07: Convective Transport (CONVEC)

DD08-10: SYNTHE Components

DD11-12: Advanced Topics

Phase 4: Migration Planning

4.1 MIGRATION_ASSESSMENT.md

4.2 API_PROJECTION.md

4.3 PHYSICS_PIPELINE_ATLAS12.md

4.4 PHYSICS_PIPELINE_SYNTHE.md

4.5 PHASE4_MIGRATION_INDEX.md

4.6 SYNTHE_PHASE4_INDEX.md

Phase 5: Pure Julia SYNTHE Implementation

Implementation Summary

Step 1: Foundation Modules (Week 1, Days 1-5)

Step 2: Line Readers & Continuum Opacity

Step 3: Populations & Opacity Integration

Step 4: Radiative Transfer

Step 5: Fortran-Exact Validation Modes

Code Review & Bug Fixes (2025-11-15)

Phase 5 Documentation (15+ documents)

Python HDF5 Tools (5 tools, ~2,570 lines)

Archaeology Documentation (3,002 lines)

5.1 ISOTOPE_HANDLING_SYNTHE.md

5.2 KURUCZ_VS_CASTELLI_COMPARISON.md

5.3 KURUCZ_BUG_FIXES.md

Phase 6: ATLAS9 + ODF

6.1 ODF_PIPELINE_OVERVIEW.md

6.2 ATLAS9_VS_ATLAS12_COMPARISON.md

Methodology

METHODOLOGY_NOTES.md

CLAUDE_CODE_WEB_TECHNICAL_GUIDE.md

Summary Statistics

Documentation by Phase

Code by Phase

Grand Total

Navigation Guide

By Topic

By Use Case

Document Status Legend

Maintenance Notes