docs(adr): 課金・マルチプロバイダ撤去と Haiku 無料一本化の ADR（ADR-0023 / #520）#532
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機能整理ロードマップ #517 のサブ issue #520。プリペイド課金（ADR-0012）・ マルチプロバイダ（ADR-0013）・Vertex 経路（ADR-0015）を Superseded にし、本番 Agent を Claude Haiku 無料一本化 + ユーザ単位レート制限へ縮退する方針を記録する。 - ADR-0023 を新規作成（Accepted）。撤去順序（レート制限 → 課金撤去 → プロバイダ 撤去）を後続 3 PR（#521-523）の指針として明記 - トレードオフ明記: Haiku コストが運営持ち → レート制限が前提条件 / 既存クレジット 残高消失（破壊的）/ 上位モデル選択の喪失 - 残す Anthropic は Vertex AI(ADC) 維持（ADR-0015 の PII ガバナンスを単一プロバイダ でも継承）。撤去は Gemini/OpenAI マルチプロバイダ部分のみ - ADR-0012/0013/0015 を Superseded by ADR-0023 に変更し索引・系統図・各 ADR の ステータスと前方参照注記を同一 PR で更新（lint-adr-index green） Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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📝 WalkthroughWalkthroughThis documentation change introduces ADR-0023 for removing prepaid billing and multi-provider LLM selection, consolidates production on Claude Haiku, and updates superseded ADR statuses and the ADR index. ChangesADR architecture consolidation
Estimated code review effort: 1 (Trivial) | ~5 minutes Possibly related issues
Possibly related PRs
Suggested labels: 🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 inconclusive)
✅ Passed checks (4 passed)
✨ Finishing Touches🧪 Generate unit tests (beta)
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Actionable comments posted: 1
🤖 Prompt for all review comments with AI agents
Verify each finding against current code. Fix only still-valid issues, skip the
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Inline comments:
In `@docs/adr/0012-agent-model-switching-and-prepaid-billing.md`:
- Line 119: Correct or defer the future-dated 2026-07-22 ADR history entries
consistently at
docs/adr/0012-agent-model-switching-and-prepaid-billing.md:119-119,
docs/adr/0013-multi-provider-llm-selection.md:74-74, and
docs/adr/0015-vertex-ai-for-gemini-anthropic.md:65-65, using the actual decision
or merge date and ensuring no entry remains later than the review date.
🪄 Autofix (Beta)
Fix all unresolved CodeRabbit comments on this PR:
- Push a commit to this branch (recommended)
- Create a new PR with the fixes
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Configuration used: defaults
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📒 Files selected for processing (5)
docs/adr/0012-agent-model-switching-and-prepaid-billing.mddocs/adr/0013-multi-provider-llm-selection.mddocs/adr/0015-vertex-ai-for-gemini-anthropic.mddocs/adr/0023-remove-billing-multiprovider.mddocs/adr/README.md
CodeRabbit 指摘: ADR 履歴注記の日付がレビュー日より未来。ADR-0023 の決定は 2026-07-21（ユーザー確認）に確定したため、その決定日に揃える。 Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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概要
機能整理ロードマップ #517 のサブ issue #520。プリペイド課金（ADR-0012）・マルチプロバイダ（ADR-0013）・Vertex 経路（ADR-0015）を Superseded にし、本番 Agent を Claude Haiku 無料一本化 + ユーザ単位レート制限へ縮退する方針を ADR-0023 として起票する。本 PR は ADR のみ（実装は #521-523）。
決定
トレードオフ（明記済み）
設計判断: 残す Anthropic の認証
マルチプロバイダ撤去後も Anthropic-Haiku は Vertex AI(ADC) を維持（ユーザー確認済み）。ADR-0015 の PII データガバナンス（学習除外 + アジア圏データ所在）を単一プロバイダでも継承する。撤去するのは Gemini（
VERTEX_LOCATION/google-genai）・OpenAI（OPENAI_API_KEY/openai）のマルチプロバイダ部分のみ。索引更新（同一 PR）
Superseded by ADR-0023に変更（各 ADR のステータス + 前方参照注記 + README 索引の両表 + LLM/Agent 系統図）make lint-adr-indexgreen受け入れ条件
make lint-adr-indexgreen）Closes #520
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