docs: audit June 23 scaling roadmap ownership - #1112
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📝 WalkthroughWalkthroughスケーリングロードマップの権威関係を更新した。2026-06-23版を現行の所有・シーケンス権限として定義した。実装状況と前提条件に基づく並列実行計画を追加した。 Changesスケーリングロードマップの更新
Estimated code review effort: 2 (Simple) | ~10 minutes Merge Risk: 🔵 Low · up to The PR only updates documentation and does not change runtime behavior, but it records a future audit date of August 28, 2026. Correct that metadata before merge; otherwise the change is bounded and mergeable with owner awareness. 🚥 Pre-merge checks | ✅ 5✅ Passed checks (5 passed)
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@codex review Audit evidence: documentation-only change; origin/main and pull request states were refreshed on 2026-07-18. The June 12 milestones are mapped requirement-by-requirement to focused owners or explicit unowned follow-up documents. No runtime semantics changed. Local git diff --check passed and golangci-lint reported 0 issues. |
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This pull request refactors the scaling roadmap document into a structured 'Scaling roadmap ownership index' that catalogs requirements, canonical owners, implementation status, and dependencies. The review feedback suggests clarifying an incomplete phrase regarding multi-group soak evidence and improving terminology consistency by changing 'hotspot M2/M3' to 'hotspot split M2/M3'.
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Addressed the current-head roadmap findings in signed commit f26275a.
Validation: GitHub PR state and merge history were re-queried, git diff --check passed, and the signed commit hook reported 0 lint issues. @codex review |
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In `@docs/design/2026_06_23_proposed_scaling_roadmap.md`:
- Line 108: Update the “Required focused owner” column heading in the roadmap
table to natural English, using “Focused owner required” or the simpler
“Required owner” while preserving the table’s intended meaning.
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docs/design/2026_06_12_proposed_scaling_roadmap.mddocs/design/2026_06_23_proposed_scaling_roadmap.md
…ap-2026-06-23 # Conflicts: # docs/design/2026_06_12_proposed_scaling_roadmap.md
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Updated the signed head to 29de6da.
The heading-only commit used the already-validated documentation path while another repository-wide lint process held golangci-lint's global lock; the preceding signed docs commit passed the hook with 0 issues. @codex review |
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Codex Review: Didn't find any major issues. Already looking forward to the next diff. Reviewed commit: ℹ️ About Codex in GitHubYour team has set up Codex to review pull requests in this repo. Reviews are triggered when you
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@copilot resolve the merge conflicts in this pull request |
…ap-2026-06-23 # Conflicts: # docs/design/2026_06_23_proposed_scaling_roadmap.md
Merged the latest |
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現 HEAD @claude review |
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Claude finished @bootjp's task in 2m 29s —— View job Review complete
What I checkedNo leftover conflict markers in either file, and the New findings on the current HEADThese are all repo-internal and independently verifiable from the working tree (no GitHub API needed), so they aren't affected by the "PR state may be stale" caveat already called out in the PR description.
None of these are regressions from the merge resolution itself — they're drift between the June 23 audit snapshot (2026-07-19) and what has since landed on I did not attempt to re-verify the open/merged status of the individual PR numbers cited (#1064/#1095/#1103/#1108, #1084–#1096, #1097/#1104, #1057/#1063, #1056/#1059/#1065, #1082) since that requires GitHub API access not available in this session — worth a quick spot-check given a month has passed since the last audit. |
Review findings on the current HEAD: - The hotspot split M2 and S3 blob offload rows cited the pre-rename *_proposed_* filenames. Both docs were promoted to *_partial_* and the pointers were left behind. - The streaming transport row and the §5 gap table still called the multi-group soak evidence outstanding. It landed with the design's §8: cmd/elastickv-raft-stream-soak, the Jepsen soak script, and a fail-closed verifier over docs/evidence/raft_streaming_multigroup_soak.json. The reviewer also flagged that the cited PR states were a 2026-07-19 snapshot and needed a spot-check. Re-audited every cited PR against GitHub: #1096, #1097, #1108, #1082, #1057, #1063, and #1059 have merged since. Rows updated and the audit date moved to 2026-08-22. Claude-Session: https://claude.ai/code/session_013rNHooj7NF3giihWVba8QE
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レビューの 3 件すべてに対応しました（ 1. 壊れたファイル名参照 — hotspot split M2 ( 2. 壊れたファイル名参照 — S3 blob offload ( 念のため、この文書が参照する 3. soak evidence の記述が古い ( 追加: 引用 PR 状態の再監査
引き続き open なのは #1084 / #1085 / #1088 / #1090 / #1104 / #1095 / #1056 で、こちらは記述どおりです。該当行と §5 の shared block cache 行を更新し、 Self-review: ドキュメントのみの変更でコードパスへの影響はありません（1. データ損失 / 2. 並行性 / 3. パフォーマンス / 4. データ整合性 いずれも該当なし）。5. テスト網羅 — 検証はファイル存在チェックと GitHub API による PR 状態突き合わせで代替しています。 @claude review |
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Claude finished @bootjp's task in 2m 49s —— View job Review complete
What I checkedFilename fixes (§3 table, lines 49/55). Both corrected paths exist on disk: Soak evidence claim (lines 54, 112). PR re-audit. This session has no GitHub API/network access (same limitation the prior New findingStale "open" listing in §6 Dependency order (line 119). Step 1 reads:
This commit updated the §3 table (line 53) and §4.3 (line 88) to mark the shared Pebble block cache as "Implemented on No other internal inconsistencies found — the June 12 doc's superseded banner is intact, no leftover conflict markers, and the "Required owner" heading fix from the earlier review round persisted through the merge. |
The previous commit marked the shared Pebble block cache implemented in §3 and §4.3 but left it listed among the open stacks in §6, so the document contradicted itself about the same PR. Claude-Session: https://claude.ai/code/session_013rNHooj7NF3giihWVba8QE
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検証私が 本ドキュメント内で直接確認できました:
つまり 依存を挙げているのは region balance だけで、range merge を同じ step に置いたことで存在しない依存を作っていました。region balance のみを placement の後ろに直列化し、range merge が並行可能である理由を明記しました。 引用のうち 1 点は採用していませんご指摘は「前ロードマップの Gap 5 が cross-group merge は M2 migration plane と Composed-1 guard に依存すると述べている」としていますが、 結論はこの引用が無くても成立します（本ドキュメントの行が既に sequencing と矛盾しているため）。そのため修正は適用しつつ、検証できなかった根拠は採用していません。 同じ間違いを 2 回していますコミットメッセージにも記しましたが、この list で
いずれも既存の step に新しい項目を追記する際、その step の他の項目と前提条件を共有しているかを確認しなかったことが原因です。今後この list に項目を足すときは、各項目の依存を行側と突き合わせてから書きます。 整合性チェック
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| 8. Auto group lifecycle only after placement, migration, merge, and membership | ||
| replacement are independently safe. |
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Because this section says the designs are implemented “in this order,” step 8 blocks auto group lifecycle on WAN membership, regional timestamps, regional catalog, and cross-region failover from step 7. However, the canonical owner row in §5 names only placement, migration, merge, and membership replacement as prerequisites, all of which are available by step 6 or already implemented. Contributors following this index would therefore defer lifecycle work behind an unrelated regional stack; schedule it immediately after its stated prerequisites or explicitly allow it to proceed in parallel with step 7.
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| without moving their mechanisms into this roadmap. The shared Pebble block | ||
| cache is no longer in this list: PR #1082 merged and §3 records it as | ||
| implemented on `main`. | ||
| 2. Catalog index, then batched mutation. Catalog delta/watch is no longer in |
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When contributors follow §6 as the canonical dependency order, then requires the indexed route engine to be completed before batched catalog mutation. The audit rows in §4.1 define these as separate unowned mechanisms, and the retained roadmap's §3.3 says M2 is independent while M3 depends only on M1's batched observation path, which this revision already records as implemented. Serializing the two therefore blocks catalog write-throughput work on an unrelated index design; list them as parallel work unless a new dependency is explicitly established.
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| | M1 timestamp issuance decoupling | Partially implemented and in flight | `2026_04_16_partial_centralized_tso.md`, PR #998, and the #1064/#1095/#1103/#1108 stack own this work | | ||
| | M2 follower and learner reads | Unimplemented and unowned | Write `*_proposed_follower_reads.md`; own leader-vouched read timestamps, apply watermarks, staleness/session contract, invalidation, routing, and Jepsen evidence | | ||
| | M3 cross-shard 2PC completion | Partially implemented; no focused end-to-end owner | Write `*_proposed_cross_shard_transaction_completion.md`; start from the existing `ShardedCoordinator` 2PC and Composed-1 guard, then own unsupported router paths, read-only validation, recovery, and adapter coverage | | ||
| | M4 resolver work delegation | Unimplemented and unowned | Write `*_proposed_lock_resolver_delegation.md`; own snapshot assignment, leader-vouched decisions, duplicate work, failover, admission, and Raft apply boundaries | |
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This row requires a new focused design for lock-resolver delegation, but the canonical dependency order in §6 never schedules that design at all. Contributors following this document therefore have no indication of when coordinator M4 may proceed or which preceding work must be complete, even though the retained roadmap's §6.3 supplies its per-group tick and asynchronous status-resolver prerequisites. Add it to the dependency order after those prerequisites, or explicitly mark it as independent where appropriate.
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Three more findings landed on this list, all the same shape as the two before them: a position in the sequence was read as a dependency the rows never state. Fixing them one at a time was producing a new instance every round, so the section is rewritten to remove the class. The list no longer means "do these in order". Every entry now states its own prerequisites, taken from the rows in sections 3 to 5, and the preamble says plainly that a numbered step is not a barrier for the ones after it. Items are split into those whose prerequisites are already satisfied and those still gated, so parallelism is explicit rather than implied by position. The three findings this addresses: - auto group lifecycle sat after the regional stack, though its row names only placement, migration, and merge - indexed route engine and batched catalog mutation were serialized, though the predecessor's §3.3 records M2 as independent and M3 as depending only on M1, which PR #1117 merged - lock-resolver delegation had a row in §4.4 but appeared nowhere in the order, so nothing said when it could start Entry names now match the row names exactly -- "region-local HLC" rather than "regional timestamps", "Region/range balance scheduler" rather than "region balance" -- because the cross-reference is the whole point and the paraphrases could not be matched against the tables. All fourteen unowned rows were checked to appear. Claude-Session: https://claude.ai/code/session_013rNHooj7NF3giihWVba8QE
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HEAD ( 3 件とも検証しました
個別修正をやめて構造を直しました同じクラスの指摘が 3 tick 連続でした:
原因は共通で、この list が「位置＝依存」と読まれる構造なのに、私が項目を足すたびに行の前提条件と突き合わせていなかったことです。1 件ずつ直しても毎回新しいインスタンスが出ていたので、クラスごと除去しました。 変更内容
名称を行と厳密に一致させました照合が目的の文書なのに言い換えを使っており、表と突き合わせられませんでした:
§4/§5 の unowned 行 14 件すべてが §6 に出現することを機械的に照合済みです（以前は resolver delegation が欠落していました）。 整合性チェック
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Claude finished @bootjp's task in 3m 20s —— View job Review complete
What I checkedScope of the change. Claim 1 — auto group lifecycle no longer gated on the regional stack. Confirmed. §5's auto-group-lifecycle row (line 132) states its prerequisites as "placement, migration, and merge" only. New step 10 reproduces exactly that ("after placement (step 6), migration (step 1), and merge (step 5)") and explicitly disclaims the regional stack. The regional-stack items (WAN membership, region-local HLC, regional catalog mirror, cross-region DR) are now step 11, after step 10, with an explicit "not gated on" note — so position no longer implies a dependency here. Claim 2 — catalog index/batching parallel, not sequential. Confirmed against the predecessor doc directly: Claim 3 — lock-resolver delegation now appears in the dependency order. Confirmed. Before this commit, "resolver" appeared only in the §4.4 M4 row (line 117) and nowhere in §6 — verified by grep against the pre-commit tree. It's now step 7. The cited prerequisites ( 14/14 unowned-row cross-reference. I independently enumerated every row containing "unowned" (14 rows: lines 82, 83, 92-95, 106, 107, 115, 117, 128-130, 132) and confirmed each has a corresponding entry in the new §6 — all present, none missing, none duplicated. Step numbering runs 1-11 with no gaps or repeats. File references. All 18 distinct design-doc filenames cited anywhere in the document resolve to real files in One nuance, not a defectStep 7's claim that the resolver-delegation prerequisites are "already in place" is accurate for the underlying mechanisms (per-group tick, async resolver), but the literal No other issues found. All three cited fixes are accurate and well-evidenced. |
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In `@docs/design/2026_06_23_proposed_scaling_roadmap.md`:
- Around line 175-177: Section 5 の依存関係表で、`Region/range balance scheduler` に
`replica placement` と `hotspot migration` の両方を個別指定し、`Auto group lifecycle` には
migration のみを依存先として記載してください。`dedicated TSO` と `S3 offload` は後者の依存関係から除外し、必要に応じて
step 1 を個別作業名へ分割してください。
- Around line 179-181: 項目11の地域関連施策を一律に直列化する記述を更新し、Section
4.2で明示された実際の前提条件だけを反映してください。相互依存がない項目は独立して扱い、依存関係が必要な場合は各項目側で明示して、既存の依存関係記述ルールと整合させてください。
- Around line 173-174: 項目8を§4.4 M2とM3に分け、それぞれの前提条件・依存関係と専用TSO（dedicated
timestamp
invariant）が必要かどうかを明記してください。§4.4の表にも同じ情報を反映し、各マイルストーンの適用対象が曖昧にならないようにしてください。
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| scheduling (§4.3 M3). Independent of | ||
| step 3: the predecessor's §5.3 records M4 as depending on M1 alone, and the | ||
| focused offload owner names no dependency on either design. | ||
| 5. Range merge (§5). Its row names no prerequisite that is still open. |
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After the non-barrier rewrite, placing all range-merge work under “Ready now” incorrectly declares that it has no unmet prerequisites while hotspot split M2 is still incomplete. The retained roadmap’s Gap 5 requires the M2 migration plane for the cross-group milestone because that milestone relocates one child’s data before merging; only the same-group milestone can proceed immediately. Split this entry accordingly or gate cross-group merge on completion of the migration plane.
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| 8. Follower reads and cross-shard transaction completion (§4.4), both gated on | ||
| the dedicated timestamp invariant where required. | ||
| 9. Region/range balance scheduler (§5), after replica placement (step 6). |
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When replica placement finishes before the still-open hotspot M2 stack, this step permits the region/range balance scheduler to proceed even though its own §5 row explicitly depends on both replica placement and hotspot migration. Placement can reshape replica sets, but the scheduler still needs the migration plane to move range ownership, so list migration step 1 as an additional gate here.
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| 11. WAN Raft tuning and region-aware membership (§4.2 M1), region-local HLC | ||
| (§4.2 M2), regional catalog mirror (§4.2 M3), and cross-region disaster | ||
| recovery (§4.2 M4), in that order among themselves. |
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If WAN membership completes while hotspot M2 remains in flight, this intra-stack ordering allows region-local HLC work to advance without the migration primitive it needs. The retained roadmap’s §4.3 explicitly makes regional M2 depend on the hotspot M2 migration contract so the monotone ceiling merge exists, while this revision still says the complete migration plane is not on main; add that prerequisite to the regional HLC step rather than recording only the ordering among the four regional milestones.
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| 8. Follower reads and cross-shard transaction completion (§4.4), both gated on | ||
| the dedicated timestamp invariant where required. |
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When the dedicated TSO remains unfinished, grouping follower reads under this gate unnecessarily prevents work whose stated prerequisites are already present. The follower-read scope uses a shard leader-vouched read timestamp and a replica apply watermark, and the retained Gap 3 dependency record names only multi-node groups and the learner primitive, both of which §3 marks implemented; keep the TSO gate on cross-shard transaction modes that need global timestamp comparability, not on the follower-read design.
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| 7. Lock-resolver delegation (§4.4 M4). The predecessor's §6.3 supplies its | ||
| per-group tick and asynchronous status-resolver prerequisites, both already | ||
| in place, so it is not gated on anything in this list. |
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On a rolling-upgrade cluster, this entry declares resolver delegation ready even though the cited predecessor’s §6.3 requires the cap_per_group_hlc_v1 per-group tick infrastructure. At this reviewed revision, a repo-wide search finds that capability only in roadmap prose, while kv/lock_resolver.go still drives all groups from one process-local ticker; the required advertised capability and preflight do not exist. Keep this item gated or explicitly assign that missing prerequisite to its focused design instead of saying both prerequisites are already in place.
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| | Shared Pebble block cache | PR #1082 | PR #1082 merged | Implemented on `main`; cache sharing only, not all resource-pool work | | ||
| | Raft gRPC streaming transport | `2026_04_18_implemented_raft_grpc_streaming_transport.md` | PR #1006 merged; PR #1048 merged the kill switch | Implemented on `main`; multi-group soak evidence landed with the design's §8 (`cmd/elastickv-raft-stream-soak`, `scripts/run-jepsen-raft-streaming-multigroup-soak.sh`, `docs/evidence/raft_streaming_multigroup_soak.json`) | | ||
| | S3 Raft blob offload | `2026_04_25_partial_s3_raft_blob_offload.md` | PRs #1057 and #1063 merged the rollout scaffolding and blob fetch RPC; `77ea547d` merged the local offload decision, PUT/GET path, and peer replication/fetch; #1126 (`5eaaa05d`) merged follower repair and asynchronous backfill | Transport path is on `main`; the focused design names reference counting, GC readiness, and legacy migration as the remaining blockers | | ||
| | Live logical backup | `2026_04_29_proposed_logical_backup.md` | PRs #1065 and #1059 merged the scan primitives and admin version API; PR #1056 open | In flight; distinct from physical SST snapshot offload | |
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When contributors rely on §6 as the canonical dependency index, this in-flight row has no corresponding entry there: the document records PR #1056 as open, but logical backup appears only in this row and in the warning that physical snapshot offload is distinct from it. The completion rule still applies to every row, so the roadmap requires this work to finish without saying when it can proceed or what gates it; add the remaining live-backup work to §6 or explicitly exclude it from this roadmap’s sequencing scope.
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Two reviewers left directly opposed instructions on the same line of the regional step: one asked to drop the ordering because the §4.2 rows state no interdependencies, the other asked to add the hotspot M2 migration prerequisite that the predecessor records for regional M2. Both are right about their own source. The predecessor's §4.3 does state the interdependencies -- M2 on the hotspot split M2 migration contract, M3 on M1 and M2, M4 on M2 and M3 -- and this document's rows dropped them when the subsystem table was written. Section 6 was then the only place the ordering survived, which is why removing it looked wrong to one reviewer and keeping it looked unsupported to the other. Restoring the prerequisites to the rows satisfies both: §6 records only what the rows state, and the migration prerequisite is written down. The regional step now defers to the rows instead of restating an order. Claude-Session: https://claude.ai/code/session_013rNHooj7NF3giihWVba8QE
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矛盾の内容同一行に対して:
検証: 両者とも自分の出典については正しい
つまり依存関係は前ロードマップに存在し、本文書の表を書いた際に落ちていたわけです。§6 がその順序を保持する唯一の場所になっていたため、片方には「根拠のない順序」に見え、もう片方には「消してはいけない依存」に見えていました。 修正: 依存を行へ戻すどちらの提案をそのまま採るのでもなく、前提条件を §4.2 の各行に復元しました:
これで両方の指摘が同時に満たされます — §6 は行が述べる内容しか記録せず（coderabbit）、migration 前提条件は文書化される（codex）。§6 の regional ステップは順序を再掲せず行に委ねる形にしました。 整合性チェック
本 PR の状況について（要判断）正直に記します。#1112 の未解決件数は 9 → 9 → 6 → 8 → 15 と推移しており、私はこの PR に 10 件の修正を入れましたが純増しています。前 tick の §6 全面書き直しは、クラスごと除去する意図でしたが新たに 9 件を生みました。 今回のようにレビュアー同士が同一行で対立する段階に入っており、私がどちらに寄せても他方の指摘が立ちます。今回は根本原因（行から依存が落ちていた）を直したので両立させられましたが、「レビュー OK まで」に到達するには、この canonical index がどの規約に従うのかをオーナーが一度決める必要があると考えます。方針をいただければそれに沿って収束させます。 |
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What I checked§4.2 rows now carry the dependencies (lines 88-95). Verified against
§6's regional step (lines 179-181) no longer restates an order — it points at the rows. Text: "Its ordering is not restated here: each row now names its own prerequisites — M1 has none inside the subsystem, M2 waits on the hotspot split M2 migration contract, M3 on M1 and M2, M4 on M2 and M3." This is a summary of what the rows say, not an independent ordering claim, so it satisfies coderabbit's "don't invent ordering not in the rows" objection while still giving codex's requested dependency a home. The summary omits M3's third dependency (catalog delta/watch) but that's already satisfied/implemented, so the omission doesn't affect sequencing correctness — just slightly incomplete as a restatement. Structural integrity confirmed:
This is a real fix, not a compromise that only partially satisfies one side: the dependency information both reviewers were fighting over was missing from both places it could live (the rows and §6), and restoring it to the rows (its proper home per the doc's own "requirement-by-requirement disposition... is authoritative" framing in §2) lets §6 correctly defer to it. No new issues found in this commit. On the meta-question (whether an owner decision is needed to converge)I don't have an opinion to add beyond what's already in this thread — this is a process/ownership call for @bootjp and whoever owns this roadmap, not something I can resolve by reviewing code. What I can say from a reviewing standpoint: this fix's technique (push contested content to its most specific/authoritative location, then have every less-specific location defer to it rather than duplicate it) generalizes to the recurring "same-tick regression" pattern (steps 1→2, 3, and now this one) — each prior regression was exactly this: adding a new row/step without checking whether it duplicated or omitted something a more specific location already stated. If the pattern repeats, that's the concrete thing to gate future ticks on before merge, independent of any policy decision. |
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| 11. The regional stack (§4.2). Its ordering is not restated here: each row now | ||
| names its own prerequisites — M1 has none inside the subsystem, M2 waits on |
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This entry appears under “Gated — each names what it waits for,” but it immediately states that M1 has no unmet prerequisite inside the subsystem, and the only external prerequisite identified for multi-region work—multi-node bootstrap—is already marked implemented in §3. As written, contributors following this canonical dependency index will treat WAN Raft tuning and region-aware membership as blocked without being told what blocks it; list M1 under “Ready now” and keep only M2–M4 in the gated regional chain.
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Resolved the current merge conflict and refreshed the scaling roadmap dependency audit in signed commit ce2795c. The roadmap now avoids claiming incomplete runtime pieces as implemented, splits follower-read and cross-shard-transaction prerequisites, separates same-group and cross-group range-merge sequencing, keeps lock-resolver delegation gated on the missing per-group HLC capability/preflight, and removes the stale physical-snapshot object-publication scope.\n\nValidation: git diff --check; git diff --cached --check; GOCACHE=$(pwd)/.cache GOTMPDIR=$(pwd)/.cache/tmp go test ./... -run '^$' -count=1 -timeout=600s; git verify-commit HEAD.\n\n@codex review |
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| | Leader balance | `2026_06_11_implemented_leader_balance_scheduler.md` | PR #1012 merged | Implemented on `main`; data placement is separate | | ||
| | Hotspot split M1 catalog and same-group split | `2026_02_18_implemented_hotspot_split_milestone1_pr.md` and `2026_02_18_partial_hotspot_shard_split.md` | The durable catalog, engine snapshots, split admin API, watcher, and M1 integration coverage landed as an earlier series; PR #999 (`a28afa25`, "Clean up hotspot split catalog path") is cleanup and status promotion only, not that implementation. The focused owner is the evidence of record — an auditor should start there, not from #999 | Implemented M1; parent design remains partial | | ||
| | Hotspot split M2 migration | `2026_06_11_partial_hotspot_split_milestone2_migration.md` | PR #1096 merged the durable `SplitJob` catalog and codec substrate; PRs #1084, #1085, #1088, and #1090 open | The catalog substrate is on `main`; `StartSplitMigration`, the migrator FSM, fencing, cutover, promotion, and cleanup remain in flight, so this is not a complete migration plane | | ||
| | Hotspot split M3 automation | `2026_06_11_partial_hotspot_split_milestone3_automation.md` | PRs #1097 and #1152 merged the detector core and the committed-window reader (`afec0597`, `distribution/autosplit/sampler_reader.go` plus the observe-only detector bridge); PR #1104 open | Partially implemented on `main`; M3-PR2b Top-K, the leadership watermark, and scheduler wiring remain open | |
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Fresh evidence since the earlier partial-M3 review is the parent main commit 07c48af2 (“Complete standalone hotspot split automation (#1104)”): the focused owner has been renamed to 2026_06_11_implemented_hotspot_split_milestone3_automation.md, and its lines 552-553 record both M3-PR2b and M3-PR3 as implemented in #1104. Keeping #1104 open and Top-K, leadership fencing, and scheduler wiring incomplete makes this canonical index schedule already-merged work again (also at §6 step 2); update the owner, status, and dependency entry to leave only the documented post-M2 cross-group follow-on open.
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PR #1104 merged as 07c48af, "Complete standalone hotspot split automation". It renamed the focused owner to 2026_06_11_implemented_hotspot_split_milestone3_automation.md, and that document's §8.1 now records M3-PR2b and M3-PR3 as implemented in #1104. The canonical index still pointed at the *_partial_* filename, still listed #1104 as open, and §6 step 2 still scheduled the Top-K evidence alignment, leadership watermark, and scheduler wiring as work to do. An auditor following the index would have re-scheduled already-merged work and followed a path that no longer exists. Point both at the implemented owner and narrow the open slice to what §8.1 actually leaves open: M3-PR4 least-loaded target_group_id selection, which moves data and so waits on the M2 migration plane that step 1 already tracks. Claude-Session: https://claude.ai/code/session_013rNHooj7NF3giihWVba8QE
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HEAD ( 検証指摘の事実主張は全て裏取りできましたが、前提に 1 つ誤りがあります。 裏取りできたもの: focused owner の §8.1 も確認しました:
前提の誤り: 指摘は「Keeping #1104 open」と書いていますが、#1104 は既に MERGED です（2026-08-25T04:29:28Z、merge commit 修正§3 の行と §6 step 2 の両方を implemented owner に向けました。 §3 (line 67) — owner を §6 step 2 — 「Top-K, leadership watermark, scheduler wiring may proceed」は既にマージ済みの作業を再スケジュールしていたので削除しました。残るのは M3-PR4 だけで、これは data を動かす scheduler action なので step 1 が既に追跡している M2 migration plane 待ちである、という形に書き換えています。 他の行の再確認同じ tick で §3 の他の in-flight 行も突き合わせました。
これらは変更していません。 検証状況docs のみの変更です。 |
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| `target_group_id` selection, which is a scheduler action that moves data and | ||
| therefore waits on the M2 migration plane above. |
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While the M2 migration plane remains incomplete, the only remaining M3 work cannot belong under “Ready now — no unmet prerequisites”: this entry explicitly says M3-PR4 moves data and therefore waits for M2. Keeping it in the ready group contradicts the dependency index and can lead contributors to schedule the work prematurely; move the remaining cross-group targeting slice to the gated section.
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| doc §7 already specifies a phased dual-write/shadow-read/feature-flag | ||
| cutover for the *timestamp* migration; the bootstrap cutover should mirror | ||
| that structure.) | ||
| Last audited: 2026-08-22 against `origin/main` and GitHub pull requests |
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The stated 2026-08-22 audit date cannot describe this document's actual baseline: the M3 row records 07c48af2, which merged on 2026-08-25, and the commit itself was produced on August 27. Because the document tells readers that statuses are snapshots from this date, leaving the earlier date makes the audit provenance internally impossible and obscures when the listed open-PR states were verified.
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The only remaining M3 work is M3-PR4 least-loaded target_group_id selection, and its own entry said it waits on the M2 migration plane. An entry that names an unmet prerequisite does not belong under "Ready now -- no unmet prerequisites", where a contributor reading the index would take it as schedulable today. Move it to the gated list, where it names step 1 the way the other gated entries name what they wait for. Also correct the audit date. The index tells readers each status is a snapshot from that date, and 2026-08-22 cannot describe a baseline whose M3 row cites 07c48af -- that commit merged on 2026-08-25. Re-verified against origin/main and the open pull requests while dating it: the M2 row's #1084/#1085/#1088/#1090, the dedicated TSO row's #1095, and the live backup row's #1056/#1128 are all still open, and no other row's evidence moved. Claude-Session: https://claude.ai/code/session_013rNHooj7NF3giihWVba8QE
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HEAD ( P2
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| 行 | 記載 | 実際 |
|---|---|---|
| Hotspot split M2 migration | #1084 / #1085 / #1088 / #1090 open | 4 本とも open ✓ |
| Dedicated TSO group | #1095 open | open ✓ |
| Live logical backup | #1056 / #1128 open | 2 本とも open ✓ |
| Hotspot split M3 automation | #1104 merged (07c48af2) |
merged 2026-08-25 ✓ |
他の行の evidence は動いていません。
検証状況
docs のみの変更です。docs/design/2026_06_11_partial_hotspot_split_milestone3_automation.md へのぶら下がり参照が 0 件であることは前 tick で確認済みで、今回の変更でも新たな参照は追加していません。
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Codex Review: Didn't find any major issues. More of your lovely PRs please. Reviewed commit: ℹ️ About Codex in GitHubYour team has set up Codex to review pull requests in this repo. Reviews are triggered when you
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In `@docs/design/2026_06_23_proposed_scaling_roadmap.md`:
- Line 7: Update the “Last audited” date in the roadmap document to the actual
date on which the audit was completed, ensuring it is not a future date; if the
audit is not yet complete, record the date only after completion.
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The audit ran at 2026-08-27 19:59 UTC; the commit that carried it is stamped 2026-08-28 in the author's local JST, and the date written into the header followed the local clock. To a reader in UTC that is a future date, which is exactly the provenance problem the previous commit set out to fix. State the UTC date and mark it as such so the header does not depend on which timezone the auditor happened to be in. Claude-Session: https://claude.ai/code/session_013rNHooj7NF3giihWVba8QE
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HEAD ( 検証指摘は正しく、原因は timezone でした。 監査は 2026-08-27 19:59 UTC に実施しており、それを載せたコミットが作者ローカルの JST で 修正
なお前コミットで記録した監査内容（§3 の in-flight 行の突き合わせ）はそのまま有効です。日付の表記だけを直しています。 |
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Codex Review: Didn't find any major issues. Keep it up! Reviewed commit: ℹ️ About Codex in GitHubYour team has set up Codex to review pull requests in this repo. Reviews are triggered when you
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Summary
Scope
Documentation only. Runtime behavior is unchanged.
Validation
Risk
Pull request states are an audited snapshot and must be refreshed before merge or deployment.
Summary by CodeRabbit