fix: open は成功したときも答える（0.34.0） - #75
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`parent.ts` が自分で掲げている規則——「どの ask もどのページでも答えられる。 何も落とさない」——を `open` だけが破っていた。成功した遷移はこの文書を 持っていく、という前提で返事を省いていたため。 その前提は 2 通りに間違っている。ホストはページの**中で**遷移できる （mulmoserver は route を push し、フレームは 1 tick 遅れて unmount される）し、 遷移したつもりで router に断られることもある（guard、あるいは既に表示中の住所）。 後者ではページは画面に残ったまま、押された見出しが何もしないまま、返らない promise を永久に待つ。 なので port が「実際に遷移したか」を返し、答えはそれに従う。取り壊し中の文書に 届く返事は誰にも届かず、何の代償も無い。 Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Reviewer's Guide
Sequence diagram for the open navigation resultsequenceDiagram
participant Page
participant Parent as viewParent
participant Host as open port
participant Router
Page->>Parent: open(cid, id)
Parent->>Host: go(cid, id)
Host->>Router: router.push(...)
alt navigation succeeds
Router-->>Host: true
Host-->>Parent: opened = true
Parent-->>Page: openResult { opened: true }
else navigation refused or unavailable
Router-->>Host: false
Host-->>Parent: false
Parent-->>Page: openResult { opened: false, reason: no-navigation }
end
File-Level Changes
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📝 WalkthroughWalkthroughThe view opening flow now always returns an ChangesView opening response
Estimated code review effort: 2 (Simple) | ~10 minutes Merge Risk: 🔵 Low · up to The PR makes open requests resolve consistently, but successful responses currently include an undocumented undefined reason property, and accurate refusal reporting depends on the downstream host returning the router result. The PR is mergeable with explicit owner follow-up to preserve the documented response shape and coordinate the host update. Suggested reviewers: 🚥 Pre-merge checks | ✅ 5✅ Passed checks (5 passed)
Full details: Docstring CoverageExplanation No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 5 files. (1 skipped: 1 unsupported.) ✨ Finishing Touches📝 Generate docstrings
🧪 Generate unit tests (beta)
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Hey - I've found 2 issues
Prompt for AI Agents
Please address the comments from this code review:
## Individual Comments
### Comment 1
<location path="src/view/parent.ts" line_range="320" />
<code_context>
});
- if (opened) return;
- answerOpen(ask.requestId, { opened: false, reason: "no-navigation" });
+ answerOpen(ask.requestId, opened ? { opened: true } : { opened: false, reason: "no-navigation" });
};
</code_context>
<issue_to_address>
**issue (bug_risk):** The success answer is posted through the mutable `open` channel rather than the channel that carried the request. If `navigate` triggers a new document that completes the handshake before the navigation promise resolves, `open` points to the new document, so the old request's `openResult` is delivered to the wrong page and the original `view.open()` promise remains pending forever.
**Triggers:** When navigation replaces or remounts the frame and the replacement document handshakes before the host's `navigate` promise settles.
**Suggested fix:** Capture the request's channel before invoking `navigate` and post the answer directly to that channel, as `act` already does for intents.
</issue_to_address>
### Comment 2
<location path="src/view/srcdoc.ts" line_range="395-400" />
<code_context>
- * a navigation that happened took this document with it. \`opened: false\`
- * with \`no-navigation\` is a host that does not navigate, such as the
- * author's preview pane; there is nothing for a page to do about it. */
+ * Answers { opened, reason }, always -- including on success, so a page is
+ * never left on a promise nothing settles. \`opened: false\` with
+ * \`no-navigation\` is a host that did not go anywhere: the author's
+ * preview pane, or a router that refused. Do not \`await\` this and then
+ * carry on -- on the ordinary success this document is being torn down
+ * while the answer is in flight. Read it to RECOVER, not to continue. */
open(cid, id) {
return request({ type: ${JSON.stringify(VIEW_MESSAGE.open)}, cid, id });
},
</code_context>
<issue_to_address>
**nitpick:** The surrounding generated-runtime comment still says an `openResult` usually never arrives and that the settling case is only a failed navigation, which is false after this change because successful in-page navigation is explicitly answered too. Consumers maintaining or copying this contract are told the opposite of the wire behavior.
**Suggested fix:** Update the `receive` handler comment to say that the answer is sent for both success and refusal, while noting that the document may be torn down before it can observe a successful answer.
```suggestion
* Answers { opened, reason } for both success and refusal. On success, this
* document may be torn down before it can observe the answer. \`opened: false\`
* with \`no-navigation\` is a host that did not go anywhere: the author's
* preview pane, or a router that refused. Read the answer to RECOVER, not
* to continue after a successful navigation. */
```
</issue_to_address>Sourcery assessment
Approval pending. 1 finding to address first.
Blocking findings: src/view/parent.ts:320
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| }); | ||
| if (opened) return; | ||
| answerOpen(ask.requestId, { opened: false, reason: "no-navigation" }); | ||
| answerOpen(ask.requestId, opened ? { opened: true } : { opened: false, reason: "no-navigation" }); |
There was a problem hiding this comment.
issue (bug_risk): The success answer is posted through the mutable open channel rather than the channel that carried the request. If navigate triggers a new document that completes the handshake before the navigation promise resolves, open points to the new document, so the old request's openResult is delivered to the wrong page and the original view.open() promise remains pending forever.
Triggers: When navigation replaces or remounts the frame and the replacement document handshakes before the host's navigate promise settles.
Suggested fix: Capture the request's channel before invoking navigate and post the answer directly to that channel, as act already does for intents.
| * Answers { opened, reason }, always -- including on success, so a page is | ||
| * never left on a promise nothing settles. \`opened: false\` with | ||
| * \`no-navigation\` is a host that did not go anywhere: the author's | ||
| * preview pane, or a router that refused. Do not \`await\` this and then | ||
| * carry on -- on the ordinary success this document is being torn down | ||
| * while the answer is in flight. Read it to RECOVER, not to continue. */ |
There was a problem hiding this comment.
nitpick: The surrounding generated-runtime comment still says an openResult usually never arrives and that the settling case is only a failed navigation, which is false after this change because successful in-page navigation is explicitly answered too. Consumers maintaining or copying this contract are told the opposite of the wire behavior.
Suggested fix: Update the receive handler comment to say that the answer is sent for both success and refusal, while noting that the document may be torn down before it can observe a successful answer.
| * Answers { opened, reason }, always -- including on success, so a page is | |
| * never left on a promise nothing settles. \`opened: false\` with | |
| * \`no-navigation\` is a host that did not go anywhere: the author's | |
| * preview pane, or a router that refused. Do not \`await\` this and then | |
| * carry on -- on the ordinary success this document is being torn down | |
| * while the answer is in flight. Read it to RECOVER, not to continue. */ | |
| * Answers { opened, reason } for both success and refusal. On success, this | |
| * document may be torn down before it can observe the answer. \`opened: false\` | |
| * with \`no-navigation\` is a host that did not go anywhere: the author's | |
| * preview pane, or a router that refused. Read the answer to RECOVER, not | |
| * to continue after a successful navigation. */ |
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Actionable comments posted: 1
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Inline comments:
In `@src/view/srcdoc.ts`:
- Around line 395-400: Update channelScript() so successful openResult responses
always include opened: true but only add reason when the response data actually
contains a reason property; preserve the documented { opened: true } shape
without an own undefined reason field. Add a publicViewBootstrap success test
covering the exact response shape.
🪄 Autofix
Fix all unresolved CodeRabbit comments on this PR:
- Push a commit to this branch (recommended)
- Create a new PR with the fixes
ℹ️ Review info
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Plan: Pro Plus
Run ID: 07485a0d-ad61-4a47-af31-a2992f067281
📒 Files selected for processing (6)
eslint.config.jspackage.jsonsrc/view/message.tssrc/view/parent.tssrc/view/srcdoc.tstest/test_viewOpen.ts
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レビュー（Sourcery, CodeRabbit）から 3 件。
**頼んだ channel に返す。** `answerOpen` は可変の `open` に投げていた。`open` は
新しい文書を連れてくることが**目的**の唯一の ask なので、遷移で入れ替わった文書が
先に握手を済ませると、返事は頼んでいないページに届き、頼んだページは永久に待つ。
`act` が同じ理由で channel を捕まえている。port を呼ぶ**前**に捕まえる。
**成功に `reason` を付けない。** ブートストラップが `{ opened, reason: data.reason }`
で settle していたので、成功が `reason: undefined` を自分の鍵として持ち、契約が
書いている `{ opened: true }` と別の形になっていた。`"reason" in result` を見る
ページは失敗と読む。
**生成ランタイム側の説明が古いまま**だった（「成功では答えが来ない」）。
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
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3 件とも本物でした。直しました。 Sourcery（bug_risk, テストを 1 本足しました: 遅い CodeRabbit（ Sourcery（nitpick,
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@coderabbitai review |
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1 participant
receptron/mulmoserver#250 のレビュー（Codex）から。指摘の理由は正確ではありませんでした——「成功の
openResultが来ない」のは漏れではなく、#73 で意図的にそうしていたからです。ただしそこを見たのは正しく、parent.tsが自分で掲げている規則をopenだけが破っていました:省いた根拠は「成功した遷移はこの文書を持っていく」でした。2 通りに間違っています。
router.pushで、ブラウザが文書を置き換えるわけではなく、フレームは 1 tick 遅れて unmount されますなので port が「実際に遷移したか」を返し、答えはそれに従います。取り壊し中の文書に届く返事は誰にも届かず、何の代償もありません——これが取引の安いほう。
view.openの説明も直しました:awaitして続きを書かないこと（通常の成功では、答えが飛んでいる間にこの文書は壊されている）。読むのは復旧のためであって続行のためではありません。変更
parent.tsのgoが成功時も{ opened: true }を送るmessage.ts/srcdoc.tsの契約の説明test_viewOpen.ts: 1 本を書き換え（成功も答える）、1 本追加（port が false を返す＝router が断ったケースはno-navigationになる）eslint.config.js: srcdoc の ratchet 115 → 117（説明はテンプレートリテラルの中なのでskipCommentsが効かない、既存の注記どおり）yarn typecheck/yarn lint/yarn test（554 pass）/yarn check:apps（ALL 10 APPS PUBLISH）。下流は mulmoserver 側で
articleOpenerが push の結果を返すように直します（いまは同期でtrueを返して rejection を握り潰している＝上の 2 つ目のケース）。Summary by Sourcery
Always settle
view.openrequests with an accurate navigation result while preserving delivery to the requesting document.New Features:
{ opened: true }response when anopenrequest navigates successfully.opened: falsewith ano-navigationreason.Bug Fixes:
view.openpromises from remaining unsettled when navigation occurs within the page or is rejected by the router.Enhancements:
view.opencontract and advise callers to use its response for recovery rather than continuation.Documentation:
view.openmessaging documentation to describe responses on both successful and unsuccessful navigation.Tests:
Summary by CodeRabbit
Bug Fixes
no-navigationresult instead of leaving the request unanswered.Documentation
Tests