セッションログ: 2026-02-23

Task 002: Rust軌道力学コアライブラリ

セッション情報

日時: 2026-02-23
所要時間: 7分
モデル: claude-opus-4-6
メッセージ数: 61
ツール呼出: 43回
バージョン: Claude Code 2.1.50

ツール使用状況

ツール	回数
Read	12
Bash	10
Write	9
TodoWrite	6
Edit	4
Task	1
Skill	1

セッションログ

[18:03] ユーザー

Check current_tasks/ for an unclaimed task. If empty, create initial tasks based on DESIGN.md.

Claim a task, work on it, commit your changes, and push to origin.

[18:03] アシスタント

I'll start by checking for existing tasks and reading the project design.

Bash — Check current_tasks directory
Read — /workspace/DESIGN.md
Read — ~/.claude/projects/-workspace/memory/MEMORY.md

[18:03] アシスタント

Let me read the existing tasks to find an unclaimed one.

Read — /workspace/current_tasks/001_scaffold_and_ci.md
Read — /workspace/current_tasks/002_rust_core_types_and_constants.md
Read — /workspace/current_tasks/003_wasm_bridge.md
Read — /workspace/current_tasks/004_subtitle_collection_script.md
Read — /workspace/current_tasks/005_github_pages_report_pipeline.md
Read — /workspace/current_tasks/006_episode_1_analysis.md

[18:03] アシスタント

Task 002 is the next unclaimed task with no dependencies (001 is done). Let me claim it and explore the current codebase first.

TodoWrite — update task list
Task — Explore Rust crate structure

[18:04] アシスタント

Good. I have a clear picture. Task 002 is unclaimed and ready to work on. Let me claim it and plan the implementation.

Read — /workspace/crates/solar-line-core/src/lib.rs

[18:04] アシスタント

Now let me claim the task and consult Codex for design decisions on the type system.

Edit — /workspace/current_tasks/002_rust_core_types_and_constants.md
Skill — nice-friend
Bash — Consult Codex on type system design

[18:05] アシスタント

Good advice from Codex. Key takeaways:

Simple newtypes (no uom dependency yet)
Add Vec3<T> generic type for 3D vectors
Validated Eccentricity type
Angle normalization helpers
Refactor existing functions to typed API now (no dual API)
Robust Kepler solver with iteration cap + tolerance

Let me now implement this. I'll restructure the crate into modules.

TodoWrite — update task list

[18:05] アシスタント

Now let me build the implementation. I'll create the module structure with units, Vec3, orbital elements, Kepler solver, and refactored existing functions — all test-first.

Write — → /workspace/crates/solar-line-core/src/units.rs
Write — → /workspace/crates/solar-line-core/src/vec3.rs
Write — → /workspace/crates/solar-line-core/src/constants.rs
TodoWrite — update task list
Write — → /workspace/crates/solar-line-core/src/orbits.rs

[18:07] アシスタント

Now let me implement the Kepler equation solver.

TodoWrite — update task list
Write — → /workspace/crates/solar-line-core/src/kepler.rs

[18:08] アシスタント

Now let me rewrite lib.rs to use the module structure and re-export the public API.

Write — → /workspace/crates/solar-line-core/src/lib.rs
Read — /workspace/crates/solar-line-core/src/lib.rs
Write — → /workspace/crates/solar-line-core/src/lib.rs

[18:08] アシスタント

Now let me compile and run the tests.

Bash — Run all Rust tests

[18:08] アシスタント

All 37 tests pass. Let me fix the unused import warning, then clean up the dead dot method in vec3.rs.

Edit — /workspace/crates/solar-line-core/src/kepler.rs

[18:08] アシスタント

Now let me remove the dead dot method in vec3.rs that doesn't work correctly and isn't used.

Edit — /workspace/crates/solar-line-core/src/vec3.rs
Read — /workspace/crates/solar-line-core/src/vec3.rs
Edit — /workspace/crates/solar-line-core/src/vec3.rs
Bash — Run all Rust tests (verify clean build)

[18:08] アシスタント

37 tests, all passing, no warnings. Let me also run the TypeScript tests to make sure nothing is broken.

Bash — Run TypeScript tests

[18:08] アシスタント

All tests pass. Now let me update the task file and commit.

TodoWrite — update task list
Read — /workspace/current_tasks/002_rust_core_types_and_constants.md
Write — → /workspace/current_tasks/002_rust_core_types_and_constants.md

[18:09] アシスタント

Now let me check git status and commit.

Bash — Show working tree status
Bash — Show recent commits
Bash — Stage and commit all Task 002 changes
Bash — Push to origin
TodoWrite — update task list

[18:09] アシスタント

Now let me save key learnings to memory for future sessions.

Bash — Ensure memory directory exists
Write — → ~/.claude/projects/-workspace/memory/MEMORY.md

[18:10] アシスタント

Task 002 is complete. Here's a summary of what was done:

Task 002: Rust Core Types, Units, and Constants — DONE

What was built

Five new modules in solar-line-core, replacing the flat lib.rs:

Module	Contents
`units.rs`	Newtype wrappers (`Km`, `KmPerSec`, `Seconds`, `Radians`, `Mu`) with full arithmetic, validated `Eccentricity` type, angle normalization
`vec3.rs`	Generic `Vec3<T>` with `AsF64` trait for dot product/norm on typed vectors
`constants.rs`	Gravitational parameters for all 8 planets (NASA JPL DE440), mean orbital radii, reference orbits (LEO, GEO)
`orbits.rs`	Typed `vis_viva`, `hohmann_transfer_dv`, `orbital_period`, `OrbitalElements`, `StateVector`
`kepler.rs`	Newton-Raphson Kepler equation solver, all anomaly conversions (mean ↔ eccentric ↔ true), mean motion, propagation

Key decisions (Codex-reviewed)

Simple newtypes over uom crate — zero dependencies, WASM-friendly
Validated Eccentricity type (rejects negative values, separate elliptical() constructor)
Existing raw-f64 API fully replaced with typed API (no dual API)

Test coverage

37 tests, all passing — including Kepler solver convergence up to e=0.967 (Halley's comet), Vallado textbook reference values, full anomaly round-trips, and orbital period validation.

Next tasks available

003: WASM bridge (now unblocked by 002)
004: YouTube subtitle collection (independent)
005: GitHub Pages pipeline (independent)