I'll start by fetching the security advisories and dependabot alerts for this repo.

Let me read the full dependabot alerts output to get a complete picture, and also check the current state of dependencies in the repo.

The output is on a single line. Let me parse it properly and also explore the repo structure to understand the dependency setup.

Now let me filter to just the open alerts and explore the codebase to understand the dependency structure.

Excellent. Now I have a clear picture. Let me group the open alerts and understand what specific actions are needed for each.

Now let me check what the latest versions of electron-builder are and whether newer versions resolve the xmldom issue, and also check what astro 6.1.10 would require.

Now let me check what the latest available versions are for the key packages and whether electron-builder has a newer major version that uses an updated plist/xmldom.

Good findings. plist@3.1.1 already uses @xmldom/xmldom@^0.9.10 which resolves the xmldom vulnerability. Let me also check if the @vercel/analytics svelte dependency can be handled.

Now I have a thorough understanding. Let me check if the svelte dependency is truly optional and if it can be excluded, and verify the postcss vulnerability specifics.

Now I have all the information I need. Let me also check one more thing about whether the @vercel/analytics svelte peer dep can be suppressed via pnpm settings.

Now I have a complete picture. Let me write the plan.

Here's a summary of the plan:

12 Open Dependabot Alerts — Fix Plan

No security advisories exist for this repo. All 12 issues are dependabot alerts across 5 packages:

Low-Risk Fixes (pnpm overrides in root package.json)

| Fix | Package | Severity | Action | |-----|---------|----------|--------| | 1 | @xmldom/xmldom (4 HIGH) | HIGH | Override plist to >=3.1.1 (new override) | | 2 | devalue (1 HIGH) | HIGH | Bump existing override from >=5.6.4 to >=5.8.1 | | 3 | postcss (1 MEDIUM) | MEDIUM | Override postcss to >=8.5.10 (new override) | | 4 | svelte (2 MEDIUM) | MEDIUM | Override svelte to >=5.55.7 (new override; only an optional peer dep of @vercel/analytics, not actually used) |

Higher-Risk Fix

| Fix | Package | Severity | Action | |-----|---------|----------|--------| | 5 | astro (4 alerts: 2 MEDIUM + 2 LOW) | MEDIUM/LOW | Major version bump from 5.18.1 to ^6.1.10 in website package + update all @astrojs/* companions |

The Astro 5→6 upgrade is the only change with meaningful risk since it's a major version bump requiring compatible companion packages and potential config changes.

Let me start executing the plan.

Let me first read the root package.json to make the edits.

Now let me apply Fixes 1-4 (the pnpm overrides) together since they're all in the same file.

Now let me apply all 4 override changes to the root package.json:

Good. Now let me tackle Fix 5 — the Astro major version bump. First, let me check what Astro 6-compatible versions exist for the companion packages.

Let me check what Astro 6-compatible versions of the companion packages exist.

Good. Let me also check what @astrojs/react latest needs for astro peer dep:

Good - @astrojs/react@5 doesn't have an astro peer dep (it works with any astro version), and all the companion packages have Astro 6-compatible releases. Let me also check if there's an Astro config file and what the migration from v5 to v6 looks like.

@astrojs/react@5 doesn't require an astro peer dep at all — that's interesting. Let me check if it actually works with Astro 6 or if there's a newer major version needed:

Let me check Astro 6's migration guide to understand what breaking changes exist, and check the @astrojs/vercel import path since the config uses @astrojs/vercel/static:

Important finding: @astrojs/vercel@10 no longer exports ./static. The config currently imports from @astrojs/vercel/static. Let me check the Astro 6 upgrade guide and understand the adapter changes.

Key findings from the Astro 6 upgrade guide:

1. Node 22 required - The project already has "node": "24.11.1" in volta, so this is fine.
2. Vite 7.0 - Astro 6 bumps to Vite 7. This will affect the catalog vite version.
3. Zod 4 - May need zod schema updates.
4. @astrojs/vercel@8 → @astrojs/vercel@10 - The old ./static export existed in v8, and v10 no longer has it. The config imports from @astrojs/vercel/static.
5. Starlight social config may have changed in 0.39.

Let me check the starlight social config change since the current config uses a social object:

@astrojs/vercel@10 does NOT have the ./static export anymore. The config currently imports @astrojs/vercel/static. Let me check what the new API looks like:

So @astrojs/vercel@9 still has ./static but needs astro@^5, while @astrojs/vercel@10 needs astro@^6 but dropped ./static. Let me understand how the vercel adapter works in v10 for static sites:

Now I have the full picture. In Astro 6 / @astrojs/vercel@10, the import changes from @astrojs/vercel/static to just @astrojs/vercel, and for static sites you just use output: 'static' without the separate static adapter. The config also uses adapter: vercel() directly.

Let me also check if starlight's social config format changed:

So @astrojs/starlight@0.38+ requires astro@^6, and @astrojs/starlight@0.32 requires astro@^5. Now let me also check the starlight social config format change between versions, and the @astrojs/starlight-tailwind compatibility:

The changelog is too large to read from GitHub. Let me check the starlight social config change more directly:

Good - @vercel/analytics@2 still has svelte >= 4 as a peer dep, so the svelte override is still needed. Now let me check the starlight social config format since the upgrade from 0.32 to 0.39 might have changed it:

The social config format changed in Starlight 0.33. Let me get the full details of this breaking change:

Now I have all the information needed. The social config changed from an object to an array format in Starlight 0.33. Let me also check if there are any other breaking changes between starlight 0.32 and 0.39 that affect this project:

I also see that Starlight 0.38+ has a breaking change about autogenerated sidebar links. Let me get the details:

Now I have a clear picture of all the breaking changes. The key sidebar autogenerate format changed in Starlight 0.38+. The current config uses the old format extensively. Let me now check if the website has a content config:

This uses legacy content collections format (src/content/config.ts with type: "data"). For Astro 6 + Starlight 0.38+, this needs to be migrated to the Content Layer API format (src/content.config.ts with loader). Let me check the Starlight 0.30 upgrade guide for the exact format:

Now I have the complete picture of all changes needed. Let me execute the Astro 6 upgrade now. This involves:

1. Update packages/website/package.json dependencies
2. Update packages/website/astro.config.mjs (vercel adapter import + social config + sidebar autogenerate format)
3. Move and update content config (src/content/config.ts → src/content.config.ts)

Let me make all the changes:

Now update the Astro config - change the vercel adapter import, update social config format, and update sidebar autogenerate format:

Now update the social config from object to array format:

Now update the sidebar autogenerate entries to use the new items array format:

Now update the last autogenerate entry in the sidebar and the vercel adapter reference:

Now update the adapter reference at the bottom of the config:

Now migrate the content config file from src/content/config.ts to src/content.config.ts with the Content Layer API format:

Now delete the old content config file:

Now I also need to update the vite override in root package.json since Astro 6 uses Vite 7, and the current override only covers Vite 6 and 7 ranges. Let me also check if the catalog vite version needs updating:

The existing vite overrides should be fine - they handle the Vite 7 range already. Now let me also check if @sentry/astro in the catalog needs updating for Astro 6 compatibility:

The @sentry/astro peer dep is >=3.x || >=4.0.0-beta which covers Astro 6. Good.

Now let me update the todo and run pnpm install:

pnpm install succeeded. There are some peer dep warnings but they're non-blocking. The key ones to note:

• vite-plugin-inspect doesn't support Vite 7 yet (website dev dep, not critical)
• The vite@~6.4.2 override is causing some peer warnings for packages that expect broader vite ranges

Let me now verify the final state of the config file and try building the website:

Config looks good. Now let me try building the website:

There's a build error with @astrojs/starlight-tailwind. The issue is that @astrojs/starlight-tailwind@5.0.0 with Tailwind CSS v4 and Vite 7 has a .css file extension issue. Let me investigate:

The issue is that @astrojs/starlight-tailwind@5.0.0 requires Tailwind CSS v4, but the tailwind.config.mjs is using the Tailwind CSS v3 config format (content, theme, plugins). Tailwind CSS v4 doesn't use a JS config file like that — it uses CSS-based configuration.

Let me check the starlight-tailwind v5 docs to understand what changed:

Now I understand. The Tailwind CSS setup changed significantly for @astrojs/starlight-tailwind@5. The old tailwind.config.mjs (v3 format) needs to be replaced with CSS-based configuration (v4 format). Let me update the tailwind setup:

Now I need to rewrite the tailwind.css to use the new Tailwind v4 / Starlight-Tailwind v5 format, and remove the old tailwind.config.mjs. The old config had:

• Font family customizations (Inter, Raleway)
• Animation definitions
• Starlight plugin + typography plugin

Now remove the old tailwind.config.mjs since it's no longer needed with Tailwind v4:

Now let me also check if the @tailwindcss/typography plugin is still needed or if it needs updating for Tailwind v4:

The @tailwindcss/typography plugin isn't actually used in any source files. It was only referenced in the old tailwind.config.mjs. Let me also check if there are references to the typography plugin elsewhere:

Good, no references to the typography plugin. It was only in the deleted config file. Now let's also check if devOverlay config option was renamed in Astro 6:

Let me check if devOverlay was renamed in Astro 6:

That option was already renamed to devToolbar in Astro 4+ but devOverlay was kept as a deprecated alias. It should still work but may produce a warning. Let me try building now and see if the tailwind changes fixed the issue:

The website builds successfully. Now let me also verify the spotlight package still builds:

Let me verify the vulnerable package versions in the lockfile and also build the spotlight package:

Both packages build successfully. Let me check the svelte version — it showed as empty, which likely means the override eliminated the optional svelte dependency entirely:

Svelte is no longer resolved as a dependency at all — the override >=5.55.7 combined with it being an optional peer dep means pnpm didn't install any svelte version since no direct package needs it. This is actually ideal — the vulnerability is eliminated by not having the package at all.

Let me verify the plist and @xmldom/xmldom chain:

All vulnerabilities are resolved:

• @xmldom/xmldom → 0.9.10 (was 0.8.10, needed >= 0.8.13)
• plist → 5.0.0 (was 3.1.0, override forced >= 3.1.1)
• devalue → 5.8.1 (was 5.6.4, needed >= 5.8.1)
• postcss → 8.5.14 (was 8.5.6/8.5.8, needed >= 8.5.10)
• svelte → not installed at all (was 4.2.19, vulnerability eliminated)
• astro → 6.3.3 (was 5.18.1, needed >= 6.1.10)

All fixes are applied and verified. Here's a summary of everything that was done:

Summary of Changes

Files Modified

1. package.json (root) — pnpm overrides:

   • Updated devalue override: >=5.6.4 → >=5.8.1
   • Added plist: ">=3.1.1" (resolves @xmldom/xmldom via plist@5.0.0 → @xmldom/xmldom@0.9.10)
   • Added postcss: ">=8.5.10"
   • Added svelte: ">=5.55.7" (optional peer dep, no longer installed at all)

2. packages/website/package.json — Astro 6 upgrade:

   • astro: ^5.18.1 → ^6.1.10
   • @astrojs/react: ^4.2.0 → ^5.0.5
   • @astrojs/starlight: ^0.32.4 → ^0.39.2
   • @astrojs/starlight-tailwind: ^3.0.1 → ^5.0.0
   • @astrojs/vercel: ^8.0.8 → ^10.0.7

3. packages/website/astro.config.mjs — Breaking change migrations:

   • Vercel adapter: @astrojs/vercel/static → @astrojs/vercel (no more /static sub-export)
   • Starlight social: object format → array format
   • Sidebar autogenerate: wrapped in items arrays

4. packages/website/src/tailwind.css — Tailwind v4 migration:

   • Replaced Tailwind v3 @import "tailwindcss" + @config with v4 layer-based imports + @theme block

5. packages/website/src/content.config.ts — New file (Content Layer API):

   • Migrated from src/content/config.ts to src/content.config.ts with docsLoader() and i18nLoader()

Files Deleted

• packages/website/src/content/config.ts (replaced by src/content.config.ts)
• packages/website/tailwind.config.mjs (no longer needed with Tailwind v4)

Resolved Alerts (12 open → 0)

| Severity | Package | Resolved Version | |----------|---------|-----------------| | 4x HIGH | @xmldom/xmldom | 0.9.10 (via plist@5.0.0) | | 1x HIGH | devalue | 5.8.1 | | 2x MEDIUM | svelte | eliminated (not installed) | | 1x MEDIUM | postcss | 8.5.14 | | 4x MEDIUM/LOW | astro | 6.3.3 |

Let me first check the current git state and create a branch.

I see there's an extra packages/website/content.config.ts in untracked files — that looks like an accidental file. Let me check what it is and clean up:

That's a stale file from a previous attempt, not part of our changes. The correct new file is at packages/website/src/content.config.ts. Let me also check if .lore.md has changes, then create the branch and commit:

Now let me create the branch, stage the right files, and commit:

There are merge conflicts in package.json and pnpm-lock.yaml because the fix/cap-esbuild-override branch had changes that aren't in main yet. Let me resolve the conflicts:

I see — the fix/cap-esbuild-override branch is 2 commits ahead of main. Those commits contain prior security fixes and the esbuild override cap. My stash was based on that branch's state. Let me resolve the conflicts by applying my changes fresh on top of main:

Now let me re-read the main branch version of package.json and apply my changes on top of it:

The main branch has a slightly different set of overrides than what I was working with. Let me apply my changes to this version:

Now I notice main doesn't have some of the overrides that were in the other branch (like defu, fast-uri, ip-address). It also has lodash: ">=4.17.23" instead of ">=4.18.0". Let me add the new overrides I need:

Now let me run pnpm install to regenerate the lockfile from the clean main base:

Clean install. Let me verify the build still works:

Build succeeds. Now let me stage the files, commit, and create the PR:

Good. The packages/website/content.config.ts and .opencode/ are untracked and should not be committed. Let me create the commit:

Commit succeeded and passed lint-staged hooks. Now let me push and create the PR:

Now let me create the PR:

PR created: https://github.com/getsentry/spotlight/pull/1303

Now let me watch CI for the PR:

Let me check if there are merge conflicts on the PR:

The PR has merge conflicts. Let me rebase onto the latest main:

Three commits landed on main since my branch was created — including the previous security fix PR and esbuild cap. Let me rebase:

Let me resolve the conflicts. First, let me check what's conflicting:

I need to merge both sides — keep the new overrides from main (defu, fast-uri, ip-address, lodash@>=4.18.0) and my additions (plist, postcss, svelte, devalue bump). Let me also check what devalue looks like on main now:

Good — the devalue bump to >=5.8.1 is already present from the previous merged PR. Now I need to resolve the conflict by combining both sides:

Now resolve the lockfile conflict — the simplest approach is to accept main's lockfile and regenerate it:

Now regenerate the lockfile with all changes applied:

Good, lockfile regenerated cleanly. Now stage the resolved files and continue the rebase:

No unmerged files but rebase won't continue. Let me check the full status:

The issue is that AGENTS.md has unstaged changes. Let me check and handle it:

Rebase succeeded. Now force-push the rebased branch:

Pushed. Let me verify the PR is no longer conflicting and watch CI:

GitHub is still computing mergeability. Let me wait a moment and then watch CI:

PR is now MERGEABLE (blocked only by required checks that haven't completed yet). Let me watch CI:

All CI checks have passed. Let me merge the PR:

PR #1303 has been merged to main and the branch has been deleted. All 12 Dependabot security alerts are now resolved.