fix: use hexadecimal build hashes

[Seranged]

Summary

• Prevent edge security rules from rejecting valid static asset requests when generated hashes contain blocked signatures.
• Keep build assets content-addressed while limiting generated hash characters to hexadecimal values.

Changes

• Configure the Vite 8 Rolldown output to use hexadecimal content hashes.
• Verify production JavaScript chunk names in CI and fail if the required build output is missing.

Test plan

• Run the production build and inspect emitted client chunk names.
• Run the full Vitest suite.
• Run typecheck.
• Run lint.

Summary by CodeRabbit

• Bug Fixes

  • Updated production builds to use consistent hexadecimal characters in generated asset filenames.
  • Improved build targeting for modern browsers.

• Tests

  • Added automated checks to verify that generated JavaScript bundle filenames follow the expected format.

[railway-app]

🚅 Deployed to the euler-lite-pr-831 environment in euler-lite(dev,PR previews)

Service	Status	Web	Updated (UTC)
dev-build	✅ Success (View Logs)	Web	Aug 25, 2026 at 8:39 am

[coderabbitai]

📝 Walkthrough

Walkthrough

The Vite build configuration now sets esnext targeting and hexadecimal Rolldown asset hashes. A Vitest suite checks that generated Nuxt client JavaScript chunks use only hexadecimal filename characters.

Changes

Build hash validation

Layer / File(s)	Summary
Configure and validate hexadecimal hashes nuxt.config.ts, tests/utils/build-hash-characters.test.ts	The Vite build retains the esnext target and configures hexadecimal Rolldown asset hashes. Tests handle missing bundles, require a JavaScript chunk, and reject non-hexadecimal filename characters.

Estimated code review effort: 2 (Simple) | ~10 minutes

Merge Risk: 🟡 Moderate · up to c0f18

The PR changes generated asset naming and adds a CI assertion, but the current assertion can reject valid shared JavaScript chunks because it validates the whole filename rather than only the hexadecimal hash. Merge should wait for the assertion to match the actual filename template.

Suggested reviewers: kasperpawlowski

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and concisely describes the main change: configuring hexadecimal build hashes for Vite 8 Rolldown output.
Docstring Coverage	✅ Passed	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 2…
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.

Full details: Docstring Coverage

Explanation

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 2 files.

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch fix/hex-build-hashes

Warning

Some tools did not complete. Review the errors below.

🔧 ESLint

If the error stems from missing dependencies, add them to the package.json file. For unrecoverable errors (e.g., due to private dependencies), disable the tool in the CodeRabbit configuration.

nuxt.config.ts

ESLint skipped: missing config or dependency (missing-dependency). The ESLint configuration references a package that is not available in the sandbox.

tests/utils/build-hash-characters.test.ts

ESLint skipped: the matched ESLint configuration already failed (missing-dependency).

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[coderabbitai]

Actionable comments posted: 1

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Inline comments:
In `@tests/utils/build-hash-characters.test.ts`:
- Line 27: Update the nonHexFiles validation around the filename filter to match
Nuxt’s actual output templates: permit entry filenames using [name].js and
shared chunk filenames using [name]-[hash].js, while validating only the hash
portion as lowercase hexadecimal. Ensure valid names such as chunk-a1b2c3.js are
accepted.

🪄 Autofix

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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ℹ️ Review info

⚙️ Run configuration

Configuration used: Repository: euler-xyz/coderabbit/.coderabbit.yaml

Review profile: CHILL

Plan: Pro

Run ID: a5ed8a33-0ec9-4f6f-8a78-3d6e9ade4d26

📥 Commits

Reviewing files that changed from the base of the PR and between a3d9e6f and c0f184d.

📒 Files selected for processing (2)

• nuxt.config.ts
• tests/utils/build-hash-characters.test.ts

Included review availability: 4 reviews are currently available. Your included PR review attempts over the past 7 days set your current allowance at 5 reviews per hour.

[LeonardEulerXYZ]

Review summary

Verdict: approved

Reviewed exact head c0f184d4a70bdd083f22d522abba16994bfbb21f against development.

The Rolldown option is wired at the correct Vite 8 output layer, preserves content addressing, and closes the blocked-signature class by restricting generated hashes to hexadecimal characters. The regression test exercises the production artifact rather than merely asserting configuration text.

Validation

• npx --yes npm@11.10.0 run build — passed
• Emitted client JS audit — 306 chunks, 0 non-hexadecimal filenames
• npx --yes npm@11.10.0 exec -- vitest run tests/utils/build-hash-characters.test.ts — 2/2 passed
• npx --yes npm@11.10.0 run typecheck — passed
• npx --yes npm@11.10.0 run lint — passed with 0 errors (6 warnings in unchanged files)
• npx --yes npm@11.10.0 run test:run — 185 files / 1,817 tests passed
• Merge-base counterfactual build — 306/306 client JS filenames were non-hexadecimal, confirming the artifact check discriminates the prior behavior
• Whole-diff security/supply-chain sweep — no concerns

I also checked the bot suggestion to accept [name]-[hash].js. It does not match the pinned Nuxt 4.5.2 production configuration, which sets both entry and chunk filenames to [hash].js; and accepting semantic prefixes would weaken the path-level edge-safety invariant because a prefix such as toast-… itself contains oast.

Browser smoke: not run — this is a production build-output invariant with no user-flow change; the exact built artifacts and focused test provide the direct validation signal.