# Documentation Condensing Session (2026-01-04)

## Changes Made:

### 1. Condensed implementation_plan.md (236→112 lines)
- Renamed to "Technical Reference"
- Updated data structures to match actual code (added eccentricity, semi_major_axis, max_bodies, RenderState)
- Replaced detailed implementation steps with completed/remaining status
- Removed redundant function lists (already in headers)
- Added user's note about Newton-Raphson propagation method

### 2. Condensed test_verification.md (143→62 lines)
- Updated for current test_simple.txt (4 bodies including eccentric comet)
- Removed detailed step-by-step verification points
- Kept essential: test command, expected behavior, tolerances

### 3. Condensed config_assumptions.md (115→44 lines)
- Removed redundant format documentation (already in README.md)
- Removed verbose session notes and code references
- Focused on active TODOs and known bugs only

### 4. Removed architecture duplication from CLAUDE.md
- Removed ~70 lines of detailed architecture (duplicate of verbose_project_overview.md)
- Now points to verbose_project_overview.md for technical details
- Added `make test` to common commands

### 5. Removed common commands from verbose_project_overview.md
- Commands now only in CLAUDE.md (single source)
- Remains canonical technical architecture reference

### 6. Added test target to Makefile
- `make test` runs: `./orbit_sim configs/test_simple.txt --headless --readable --days 365`

## File Purposes Established

- **README.md**: User-facing guide
- **CLAUDE.md**: Concise Claude guidance + commands
- **docs/verbose_project_overview.md**: Canonical technical architecture
- **docs/implementation_plan.md**: Data structures reference
- **docs/config_assumptions.md**: Active issues & TODOs
- **docs/test_verification.md**: Test reference

## Commits

- `af1b54b` Condense and deduplicate project documentation

## Results

Net reduction: 278 lines removed (6 files changed, +132/-410)
Documentation now DRY with clear separation of concerns.