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fix(404): ship the app's own not-found boundaries, with focus that survives a soft nav - #78

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fix/not-found-boundary
Aug 4, 2026
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fix(404): ship the app's own not-found boundaries, with focus that survives a soft nav#78
guarzo merged 1 commit into
mainfrom
fix/not-found-boundary

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@guarzo

@guarzo guarzo commented Aug 4, 2026

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Design sweep SYNTHESIS.md issue 3 — the last open blocker (error-boundary-audit #1 blocker, error-boundary-critique #1 major).

The problem

There was no not-found.tsx anywhere in src/, so payouts/[id]/page.tsx:91's notFound() fell through to Next's built-in HTTPAccessErrorFallback. That page renders inside RootLayout and injects body{color:#000;background:#fff;margin:0}, which wins on source order over background: var(--void) — both colours banned by name in DESIGN.md:22. Its dark branch keys off the OS preference rather than the colorScheme: "dark" declared at layout.tsx:39, so a member on a light-mode OS got a full-bleed white screen from a dark-only app. It also sets font-family: system-ui inline (losing both self-hosted faces) and contains zero links — first Tab leaves the document.

It is reached as a soft navigation: /payouts is the app's only next/link call site, so clicking a since-deleted operation produced no document load, no browser spinner, and focus reset to <body>.

What shipped

Two files, not one. src/app/payouts/[id]/not-found.tsx is reachable only through page.tsx, which calls requirePayoutReader() before notFound() — so everyone who lands there has already cleared the guard, and it can offer /payouts in the nav and as its primary action without reading the session. The root boundary has no such proof and sends everyone to /account. That difference is the point: the blocker path is a member clicking a row in the operations list, and the segment file puts them back in the list.

Neither file reads the session. /_not-found builds as ○ (Static); adding cookies() would change that. Navs are fixed and minimal — /payouts and /admin/* are both gated, and a link that bounces the member straight back out is worse than no link.

FocusHeading — an h1 with tabIndex={-1} that focuses on mount. The App Router's own focus() call targets the first element of the changed segment (the <header>), which is not focusable, so it is a no-op. This is the mechanism admin/sync/page.tsx:86-92 argues for in writing, applied to the case where the inserted element is the whole page.

Two things measured rather than assumed

Both recorded in comments so they are not re-litigated:

  • The root boundary's metadata export applies; the segment-scoped one's does not. page.tsx's own metadata survives its notFound(), so that tab still reads "Payout operation". Correcting it needs generateMetadata + a second lookup on a working page — left as follow-up, and cosmetic next to the announcement, which focus carries either way.
  • Next's route announcer was seen reading the h1, not the stale title, because React is mid-swap on the hoisted <title> when its effect fires. A race that lands well, not a contract — so the suite does not pin it.

Stale claims from the sweep, corrected

Verification

Check Result
npm run typecheck clean
npm run lint 0 errors (3 pre-existing no-img-element warnings on login/account)
npm run format:check All matched files use Prettier code style!
npm test 710 passed (67 files) — private DB per the worktree rule
npm run test:e2e 117 passed (5 new)
npm run build clean; /_not-found prerenders as ○ (Static), confirming the no-session constraint holds

The new spec covers the soft-nav arrival end to end (list open → row deleted behind it → click → boundary + focus + working exit), the 404 status surviving a custom component, ground/typeface not being the injected ones, the pasted truncated uuid landing on the operation 404 rather than the error boundary, and the payouts boundary staying behind the payouts guard.

Where to look

src/app/_components/focus-heading.tsx — whether always-focusing is right. On a hard navigation the document load already announces, and this moves focus past the skip link a beat later. The tradeoff is argued in the file comment; the alternative is leaving focus on <body> after a soft nav, which has no recovery.

🤖 Generated with Claude Code

Summary by CodeRabbit

  • New Features

    • Added a consistent, application-styled 404 page with navigation, account access, explanatory messaging, and accessible heading focus.
    • Added a dedicated payout-operation 404 page with recovery navigation back to payouts.
    • Invalid payout operation IDs now display the appropriate not-found experience instead of a generic error page.
  • Tests

    • Added end-to-end coverage for 404 status, layout, navigation, focus behavior, recovery links, and authorization handling.

…rvives a soft nav

There was no `not-found.tsx` anywhere in `src/`, so `payouts/[id]/page.tsx`'s
`notFound()` fell through to Next's built-in `HTTPAccessErrorFallback`. That
page renders *inside* `RootLayout` and injects
`body{color:#000;background:#fff;margin:0}`, which wins on source order over
`background: var(--void)` — both of those colours banned by name in DESIGN.md.
Its dark branch keys off the OS preference rather than the `colorScheme:"dark"`
this app declares, so a member on a light-mode OS got a full-bleed white screen
from a dark-only app. It also sets `font-family: system-ui` inline, losing both
self-hosted faces, and contains zero links: the first Tab left the document and
the only exits were Back and the URL bar.

Shipping any file here means that fallback is never reached, under 15 or 16 —
which matters while `package.json` (^16.3.0) and the lockfile (15.5.22) still
disagree.

Two files, not one. The segment-scoped `payouts/[id]/not-found.tsx` is
reachable only through `page.tsx`, which calls `requirePayoutReader()` *before*
`notFound()` — so everyone who lands on it has already cleared the guard, and
it can offer `/payouts` in the nav and as its primary action without reading
the session. The root boundary has no such proof and sends everyone to
`/account`. That difference is the whole point: the path that makes this a
blocker is a member clicking a since-deleted row in the operations list, and
the segment file puts them back in the list rather than at their account page.

Neither file reads the session, deliberately — `/_not-found` builds as `○
(Static)`, and adding `cookies()` would change that. The navs are fixed and
minimal.

Focus is the other half. That row click is a *soft* navigation (`/payouts` is
the app's only `next/link` call site), so there is no document load, and the
pressed link unmounts out from under the focus ring, leaving focus on `<body>`.
The App Router's own `focus()` call targets the first element of the changed
segment — the `<header>` — which is not focusable, so it is a no-op. Hence
`FocusHeading`: an `h1` with `tabIndex={-1}` that focuses on mount, which both
lands the keyboard inside the new content and gets the page's name announced.
This is the mechanism `admin/sync/page.tsx` argues for in writing, applied to
the case where the inserted element *is* the whole page.

Two things measured rather than assumed, both recorded in comments:

- The root boundary's `metadata` export applies; the segment-scoped one's does
  not. `page.tsx`'s own metadata survives its `notFound()`, so that tab still
  reads "Payout operation". Correcting it needs `generateMetadata` and a second
  lookup on a working page — left as follow-up, and cosmetic next to the
  announcement, which focus carries either way.
- Next's route announcer was seen reading the `h1` rather than the stale title,
  because React is mid-swap on the hoisted `<title>` when its effect fires.
  That is a race that lands well, not a contract, so the suite does not pin it.

e2e covers the soft-nav arrival end to end (list open, row deleted behind it,
click, assert boundary + focus + exit), the 404 status surviving a custom
component, the ground and typeface not being the injected ones, the pasted
truncated uuid, and that the payouts boundary stays behind the payouts guard.

Refs: design sweep SYNTHESIS.md issue 3 (error-boundary-audit #1, blocker;
error-boundary-critique #1, major).
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coderabbitai Bot commented Aug 4, 2026

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Review Change Stack

📝 Walkthrough

Walkthrough

Added custom root and payout-operation 404 pages. Added focused heading behavior, navigation, authorization handling, and Playwright coverage for status, metadata, routing, focus, and error boundaries.

Changes

404 pages

Layer / File(s) Summary
Root 404 page and heading focus
src/app/_components/focus-heading.tsx, src/app/not-found.tsx, e2e/not-found.spec.ts
The application now renders a styled root 404 page with metadata, navigation, account routing, and a programmatically focused heading.
Payout operation 404 flow
src/app/payouts/[id]/not-found.tsx, e2e/not-found.spec.ts
Payout operation routes now render a segment-specific 404 page with recovery navigation. Tests cover client transitions, invalid IDs, focus placement, and authorization redirects.

Estimated code review effort: 4 (Complex) | ~45 minutes

Sequence Diagram(s)

sequenceDiagram
  participant Member
  participant PayoutOperationPage
  participant PayoutOperationNotFound
  Member->>PayoutOperationPage: open payout operation
  PayoutOperationPage->>PayoutOperationNotFound: render missing operation boundary
  PayoutOperationNotFound->>Member: show recovery link and focused heading
  Member->>PayoutOperationNotFound: select All operations
Loading

Possibly related PRs

  • guarzo/authGD#59: Adds the route-level error boundary used to distinguish unexpected errors from recoverable 404 pages.

Poem

A rabbit found a missing page,
And gave its heading focus on stage.
“Back to operations,” links now gleam,
While signed-out paths route cleanly downstream.
The error boundary stays away—
Hoppy 404s save the day!

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name Status Explanation Resolution
Docstring Coverage ⚠️ Warning Docstring coverage is 66.67% which is insufficient. The required threshold is 80.00%. Write docstrings for the functions missing them to satisfy the coverage threshold.
✅ Passed checks (4 passed)
Check name Status Explanation
Title check ✅ Passed The title clearly summarizes the custom 404 boundaries and focus behavior added by the pull request.
Description check ✅ Passed The description clearly explains the problem, implementation, scope, and verification, but it omits the template headings and explicit deploy notes and flags.
Linked Issues check ✅ Passed Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check ✅ Passed Check skipped because no linked issues were found for this pull request.
✨ Finishing Touches 💡 1
📝 Generate docstrings 💡
  • Create stacked PR
  • Commit on current branch
🧪 Generate unit tests (beta)
  • Create PR with unit tests
  • Commit unit tests in branch fix/not-found-boundary
✨ Simplify code
  • Create PR with simplified code
  • Commit simplified code in branch fix/not-found-boundary

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@guarzo
guarzo enabled auto-merge (squash) August 4, 2026 16:47
@guarzo
guarzo merged commit 0f6bf1f into main Aug 4, 2026
5 of 6 checks passed

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Actionable comments posted: 2

🤖 Prompt for all review comments with AI agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

Inline comments:
In `@e2e/not-found.spec.ts`:
- Around line 143-151: Update the not-found E2E coverage to use a genuinely
truncated UUID and add a separate assertion for that invalid identifier,
ensuring it produces the “No such operation” response rather than reaching the
database or rendering “Something broke.” Preserve the existing complete-UUID
missing-record case separately.
- Around line 121-126: Update the focus assertion in the not-found test to use
the retrying toBeFocused() matcher on the heading, rather than reading
document.activeElement once via page.evaluate. Keep the existing “No such
operation” text assertion.
🪄 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
⚙️ Run configuration

Configuration used: Organization UI

Review profile: ASSERTIVE

Plan: Pro Plus

Run ID: 90b6d4c7-f684-4e34-9bbe-be8c89f8f1fa

📥 Commits

Reviewing files that changed from the base of the PR and between 34e9b77 and 7e251b2.

📒 Files selected for processing (4)
  • e2e/not-found.spec.ts
  • src/app/_components/focus-heading.tsx
  • src/app/not-found.tsx
  • src/app/payouts/[id]/not-found.tsx

Comment thread e2e/not-found.spec.ts
Comment on lines +121 to +126
const focused = await page.evaluate(() => ({
tag: document.activeElement?.tagName,
text: document.activeElement?.textContent,
}));
expect(focused.tag).toBe("H1");
expect(focused.text).toBe("No such operation");

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📐 Maintainability & Code Quality | 🟡 Minor | ⚡ Quick win

🧩 Analysis chain

🌐 Web query:

Does Playwright Test version 1.62.1 support the auto-retrying assertion await expect(locator).toBeFocused()?

💡 Result:

Yes, Playwright Test version 1.62.1 supports the auto-retrying assertion await expect(locator).toBeFocused [1][2][3]. As a standard "web-first" assertion, toBeFocused is designed to automatically retry until the condition is met or the specified timeout is reached [4][3]. This behavior has been a core feature of Playwright's locator assertions since it was introduced in version 1.20 [2]. The assertion functions by periodically re-testing the element's state, making it highly effective for handling asynchronous UI updates without requiring manual waits [4]. Playwright version 1.62.1 was released on July 30, 2026, primarily to address critical regressions [5][6]. It maintains full compatibility with the established API, including all existing auto-retrying assertions [6][1][2].

Citations:


🏁 Script executed:

#!/bin/bash
set -eu
printf '%s\n' '--- target test ---'
cat -n e2e/not-found.spec.ts | sed -n '90,160p'
printf '%s\n' '--- focus implementation and references ---'
rg -n -S 'FocusHeading|No such operation|notFound\\(|toBeFocused|not-found' . \
  -g '!node_modules' -g '!dist' -g '!build' | head -200
printf '%s\n' '--- Playwright version declarations ---'
rg -n -S '"`@playwright/test`"|"playwright"' package.json package-lock.json pnpm-lock.yaml yarn.lock .github 2>/dev/null | head -100

Repository: guarzo/authGD

Length of output: 4537


🏁 Script executed:

#!/bin/bash
set -eu
cat -n e2e/not-found.spec.ts | sed -n '90,160p'
rg -n -S 'FocusHeading|No such operation|notFound\\(|toBeFocused|not-found' . \
  -g '!node_modules' -g '!dist' -g '!build' | head -200
rg -n -S '"`@playwright/test`"|"playwright"' package.json package-lock.json pnpm-lock.yaml yarn.lock 2>/dev/null | head -100

Repository: guarzo/authGD

Length of output: 4376


🏁 Script executed:

#!/bin/bash
set -eu
printf '%s\n' '--- focus symbols ---'
rg -n -F 'FocusHeading' . -g '!node_modules' -g '!dist' -g '!build' || true
rg -n -F 'No such operation' . -g '!node_modules' -g '!dist' -g '!build' || true
rg -n -F 'notFound(' . -g '!node_modules' -g '!dist' -g '!build' || true
rg -n -F 'toBeFocused' . -g '!node_modules' -g '!dist' -g '!build' || true
printf '%s\n' '--- relevant TypeScript and package metadata files ---'
git ls-files | rg '(^|/)(package\.json|.*not-found.*|.*Focus.*|.*focus.*)\.(json|ts|tsx|js|jsx)$' | head -100
printf '%s\n' '--- exact Playwright lockfile entry ---'
sed -n '2045,2075p' package-lock.json

Repository: guarzo/authGD

Length of output: 3806


🏁 Script executed:

#!/bin/bash
set -eu
rg -n -F 'FocusHeading' . -g '!node_modules' -g '!dist' -g '!build' || true
rg -n -F 'No such operation' . -g '!node_modules' -g '!dist' -g '!build' || true
rg -n -F 'notFound(' . -g '!node_modules' -g '!dist' -g '!build' || true
rg -n -F 'toBeFocused' . -g '!node_modules' -g '!dist' -g '!build' || true
git ls-files | rg '(^|/)(package\.json|.*not-found.*|.*Focus.*|.*focus.*)\.(json|ts|tsx|js|jsx)$' | head -100
sed -n '2045,2075p' package-lock.json

Repository: guarzo/authGD

Length of output: 3689


🏁 Script executed:

#!/bin/bash
set -eu
printf '%s\n' '--- FocusHeading implementation ---'
cat -n src/app/_components/focus-heading.tsx
printf '%s\n' '--- payouts not-found boundary ---'
cat -n src/app/payouts/'[id]'/not-found.tsx
printf '%s\n' '--- existing retrying focus assertions ---'
cat -n e2e/admin.spec.ts | sed -n '225,260p'

Repository: guarzo/authGD

Length of output: 9208


🏁 Script executed:

#!/bin/bash
set -eu
cat -n src/app/_components/focus-heading.tsx
cat -n src/app/payouts/'[id]'/not-found.tsx
cat -n e2e/admin.spec.ts | sed -n '225,260p'

Repository: guarzo/authGD

Length of output: 9094


🏁 Script executed:

#!/bin/bash
set -eu
python3 - <<'PY'
from pathlib import Path
import re

component = Path("src/app/_components/focus-heading.tsx").read_text()
test = Path("e2e/not-found.spec.ts").read_text()
admin = Path("e2e/admin.spec.ts").read_text()
package_lock = Path("package-lock.json").read_text()

focus_effect = bool(re.search(r"useEffect\s*\(\s*\(\)\s*=>\s*\{.*?\.focus\(\)", component, re.S))
visible_pos = test.find('toBeVisible();', test.find('name: "No such operation"'))
evaluate_pos = test.find('page.evaluate', visible_pos)
one_shot_assertions = bool(re.search(r'page\.evaluate\(\(\)\s*=>\s*\(\{', test))
proposed_api_used = '.toBeFocused()' in admin
locked_version = bool(re.search(r'"node_modules/@playwright/test":\s*\{\s*"version":\s*"1\.62\.1"', package_lock))

print(f"FocusHeading focuses in useEffect: {focus_effect}")
print(f"Visibility assertion precedes page.evaluate: {0 <= visible_pos < evaluate_pos}")
print(f"Current focus check uses one-shot page.evaluate: {one_shot_assertions}")
print(f"Repository already uses Locator.toBeFocused(): {proposed_api_used}")
print(f"Lockfile contains `@playwright/test` 1.62.1: {locked_version}")
PY

Repository: guarzo/authGD

Length of output: 395


Use a retrying focus assertion.

FocusHeading applies focus in useEffect, so the visibility assertion can pass before the heading receives focus. Replace the one-shot check with toBeFocused().

Proposed test change
-  const focused = await page.evaluate(() => ({
-    tag: document.activeElement?.tagName,
-    text: document.activeElement?.textContent,
-  }));
-  expect(focused.tag).toBe("H1");
-  expect(focused.text).toBe("No such operation");
+  await expect(
+    page.getByRole("heading", { name: "No such operation" }),
+  ).toBeFocused();
📝 Committable suggestion

‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.

Suggested change
const focused = await page.evaluate(() => ({
tag: document.activeElement?.tagName,
text: document.activeElement?.textContent,
}));
expect(focused.tag).toBe("H1");
expect(focused.text).toBe("No such operation");
await expect(
page.getByRole("heading", { name: "No such operation" }),
).toBeFocused();
🤖 Prompt for AI Agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

In `@e2e/not-found.spec.ts` around lines 121 - 126, Update the focus assertion in
the not-found test to use the retrying toBeFocused() matcher on the heading,
rather than reading document.activeElement once via page.evaluate. Keep the
existing “No such operation” text assertion.

Comment thread e2e/not-found.spec.ts
Comment on lines +143 to +151
// A well-formed uuid that resolves to nothing — the shape a link preview
// leaves behind. `getPayoutOperationDetail` returns null and `page.tsx`
// calls `notFound()`.
const res = await page.goto("/payouts/00000000-0000-4000-8000-000000000000");

expect(res?.status()).toBe(404);
await expect(page.getByRole("heading", { name: "No such operation" })).toBeVisible();
// Not "Something broke": a mistyped id is not a fault on this end.
await expect(page.getByText("Something broke")).toHaveCount(0);

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🎯 Functional Correctness | 🟡 Minor | ⚡ Quick win

🧩 Analysis chain

🏁 Script executed:

#!/bin/bash
set -euo pipefail

# Map the dynamic route before inspecting malformed-ID handling.
ast-grep outline 'src/app/payouts/[id]/page.tsx' --items all --view expanded

# Expect invalid IDs to reach notFound() before a UUID query can fail.
rg -n -C 8 --glob '*.ts' --glob '*.tsx' \
  'getPayoutOperationDetail|notFound\(|requirePayoutReader|safeParse|uuid' src

Repository: guarzo/authGD

Length of output: 49068


🏁 Script executed:

#!/bin/bash
set -euo pipefail

printf '%s\n' '--- e2e/not-found.spec.ts ---'
cat -n e2e/not-found.spec.ts | sed -n '1,190p'

printf '%s\n' '--- payout route boundaries ---'
for f in 'src/app/payouts/[id]/page.tsx' 'src/app/payouts/[id]/not-found.tsx' 'src/app/payouts/[id]/error.tsx'; do
  if [ -f "$f" ]; then
    printf '\n### %s\n' "$f"
    cat -n "$f" | sed -n '1,180p'
  fi
done

printf '%s\n' '--- relevant test and configuration references ---'
rg -n -C 4 --glob 'e2e/**' --glob 'tests/**' --glob 'package.json' \
  'not-found|No such operation|Something broke|payouts/.+id|error\.tsx|baseURL|webServer' .

Repository: guarzo/authGD

Length of output: 34835


🏁 Script executed:

#!/bin/bash
set -euo pipefail

python3 - <<'PY'
from pathlib import Path
import re

test = Path("e2e/not-found.spec.ts").read_text()
route = Path("src/app/payouts/[id]/page.tsx").read_text()
service = Path("src/services/payout-view.ts").read_text()

paths = re.findall(r'page\.goto\("([^"]+)"\)', test)
for path in paths:
    if path.startswith("/payouts/"):
        value = path.removeprefix("/payouts/")
        print(f"{path}: id_length={len(value)}, uuid_shape={bool(re.fullmatch(r'[0-9a-fA-F]{{8}}-[0-9a-fA-F]{{4}}-[0-9a-fA-F]{{4}}-[0-9a-fA-F]{{4}}-[0-9a-fA-F]{{12}}', value))}")

print("route validates id before database lookup:",
      bool(re.search(r"(uuid|safeParse|parse|validate|schema)", route, re.I)))
print("route passes id directly to detail lookup:",
      bool(re.search(r"getPayoutOperationDetail\s*\(\s*getDb\(\)\s*,\s*id\s*\)", route)))
print("detail lookup compares database UUID column with operationId:",
      bool(re.search(r"eq\s*\(\s*payoutOperation\.id\s*,\s*operationId\s*\)", service)))
PY

printf '%s\n' '--- error boundaries ---'
find src -type f \( -name 'error.tsx' -o -name 'global-error.tsx' \) -print
rg -n -C 5 'Something broke|error boundary|ErrorBoundary' src e2e

Repository: guarzo/authGD

Length of output: 17361


🏁 Script executed:

#!/bin/bash
set -euo pipefail

printf '%s\n' '--- exact detail lookup implementation ---'
cat -n src/services/payout-view.ts | sed -n '100,145p'

printf '%s\n' '--- database driver and UUID handling references ---'
rg -n -C 4 --glob 'package.json' --glob 'pnpm-lock.yaml' --glob 'package-lock.json' --glob 'yarn.lock' --glob '*.ts' \
  'postgres|pg\b|drizzle|uuid\(' .

Repository: guarzo/authGD

Length of output: 50369


🏁 Script executed:

#!/bin/bash
set -euo pipefail

python3 - <<'PY'
from pathlib import Path
import re

test = Path("e2e/not-found.spec.ts").read_text()
route = Path("src/app/payouts/[id]/page.tsx").read_text()
lookup = route[route.index("export default async function"):route.index("const nav =")]

for path in re.findall(r'page\.goto\("([^"]+)"\)', test):
    if path.startswith("/payouts/"):
        value = path.removeprefix("/payouts/")
        valid_uuid = bool(re.fullmatch(
            r'[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-'
            r'[0-9a-fA-F]{4}-[0-9a-fA-F]{12}', value
        ))
        print(f"{path}: length={len(value)}, valid_uuid={valid_uuid}")

print("route validation statements before lookup:",
      bool(re.search(r'\b(?:uuid|safeParse|parse|validate)\b', lookup, re.I)))
print("direct lookup with raw id:",
      bool(re.search(
          r'getPayoutOperationDetail\s*\(\s*getDb\(\)\s*,\s*id\s*\)', lookup
      )))
PY

Repository: guarzo/authGD

Length of output: 380


Use a genuinely truncated UUID and validate it before the database lookup.

The current value is a complete, valid UUID, so it only covers a missing record. The route passes id directly to the UUID query; invalid input can reach error.tsx. Add a separate case that asserts No such operation.

🤖 Prompt for AI Agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

In `@e2e/not-found.spec.ts` around lines 143 - 151, Update the not-found E2E
coverage to use a genuinely truncated UUID and add a separate assertion for that
invalid identifier, ensuring it produces the “No such operation” response rather
than reaching the database or rendering “Something broke.” Preserve the existing
complete-UUID missing-record case separately.

guarzo added a commit that referenced this pull request Aug 4, 2026
)

Two ways `/payouts/[id]` told the member something untrue.

The tab read "Payout operation" for an operation that isn't there. The
segment-scoped `not-found.tsx` shipped in #78 recorded why it couldn't fix
that from its own end: a not-found boundary doesn't get to set the title,
and `page.tsx`'s static `metadata` is applied even when the page throws.
So the title moves to `generateMetadata`, which resolves the same lookup
and names the operation — or says it isn't there.

That was left as follow-up on the grounds it would cost a second lookup of
the same row. It doesn't: both callers go through one `cache()`d loader,
and Next resolves metadata and render in the same request. Measured with a
counter on the miss path — one lookup per page load, not two.

And `/payouts/<not-a-uuid>` returned a 500. The id reached the `uuid`
column as a parameter, postgres rejected the cast with 22P02, and the
member got "Something broke" — an apology for a server fault, for a
mistyped or truncated URL. This is the defect class #74 spent itself
fixing across `/payouts/*`. A shape check next to the existing
`notFound()` sends it down the 404 path the well-formed-but-missing id
already took.

The regex is deliberately narrower than postgres's own parser, which was
measured accepting braces, hyphenless and oddly-hyphenated forms. None of
those can come from this app or a link it renders, and being narrower than
the database fails toward the 404 rather than the 500.
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