diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index d3d0a8f..35e0126 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -21,7 +21,7 @@ permissions:
 jobs:
   ci:
     name: Lint, build, verify
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-24.04
     timeout-minutes: 10
     steps:
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd  # v6.0.2
@@ -31,8 +31,9 @@ jobs:
           bun-version: 1.3.13
 
       # Bun is the package manager and script runner, but Next.js (and tsc)
-      # run on Node. ubuntu-latest's default Node version drifts; pin via
-      # .nvmrc so a future GitHub bump can't break the build silently.
+      # run on Node. The runner image is pinned (ubuntu-24.04) but Node
+      # version inside it can still drift; pin via .nvmrc so a future
+      # GitHub bump can't break the build silently.
       - uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e  # v6.4.0
         with:
           node-version-file: .nvmrc
@@ -153,12 +154,12 @@ jobs:
 
   # Runs only on PRs (no baseline diff to compute on a push to main).
   # Compares the PR's dependency manifest against main and flags
-  # high-severity advisories or license incompatibilities. Posts a summary
-  # comment on the PR when it finds something. continue-on-error while we
-  # establish a baseline of acceptable findings.
+  # high-severity advisories or license incompatibilities. Hard-gated to
+  # match the `bun audit` posture: a PR introducing a new high-severity
+  # advisory must block merge, not just post a comment.
   dependency-review:
     if: github.event_name == 'pull_request'
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-24.04
     permissions:
       contents: read
       pull-requests: write
@@ -166,7 +167,33 @@ jobs:
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd  # v6.0.2
       - name: Dependency Review
         uses: actions/dependency-review-action@2031cfc080254a8a887f58cffee85186f0e49e48  # v4.9.0
-        continue-on-error: true
         with:
           fail-on-severity: high
           comment-summary-in-pr: on-failure
+
+  # Defense-in-depth on top of GitHub's push protection. Push protection
+  # covers high-entropy / known-provider patterns at push time; TruffleHog
+  # re-scans diffs on PRs + push to main, catching secrets that slipped
+  # past push protection (low-entropy formats, detector patterns added
+  # after the secret was committed, or push-protection bypass via the
+  # "I'll fix it later" allow path).
+  secret-scan:
+    runs-on: ubuntu-24.04
+    permissions:
+      contents: read
+    steps:
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd  # v6.0.2
+        with:
+          # TruffleHog diffs base..head and needs the full history present.
+          fetch-depth: 0
+      - name: TruffleHog scan
+        uses: trufflesecurity/trufflehog@17456f8c7d042d8c82c9a8ca9e937231f9f42e26  # v3.95.2
+        with:
+          # On PRs: scan the diff between base and head. On push to main:
+          # scan the previous commit to HEAD. The action infers both from
+          # the event context.
+          # --results=verified,unknown drops trufflehog's "unverified" tier
+          # (pattern-matched but couldn't reach the verifier endpoint) to
+          # keep noise down without losing coverage of secrets whose
+          # verifiers don't recognize them yet.
+          extra_args: --results=verified,unknown
diff --git a/.github/workflows/claude.yml b/.github/workflows/claude.yml
index 4b90b53..aef1eaf 100644
--- a/.github/workflows/claude.yml
+++ b/.github/workflows/claude.yml
@@ -32,7 +32,7 @@ jobs:
       (github.event_name == 'pull_request_review_comment' && contains(github.event.comment.body, '@claude')) ||
       (github.event_name == 'pull_request_review' && contains(github.event.review.body, '@claude')) ||
       (github.event_name == 'issues' && (contains(github.event.issue.body, '@claude') || contains(github.event.issue.title, '@claude')))
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-24.04
     timeout-minutes: 30
     permissions:
       contents: write
diff --git a/.github/workflows/lighthouse.yml b/.github/workflows/lighthouse.yml
index 550d6b7..868e922 100644
--- a/.github/workflows/lighthouse.yml
+++ b/.github/workflows/lighthouse.yml
@@ -17,7 +17,7 @@ concurrency:
 jobs:
   lighthouse:
     name: Lighthouse audit
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-24.04
     timeout-minutes: 15
     steps:
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd  # v6.0.2
@@ -27,8 +27,9 @@ jobs:
           bun-version: 1.3.13
 
       # Bun is the package manager and script runner, but Next.js (and the
-      # lhci binary) run on Node. Pin Node via .nvmrc so a future GitHub
-      # bump can't break the audit silently.
+      # lhci binary) run on Node. The runner image is pinned (ubuntu-24.04)
+      # but Node version inside it can still drift; pin via .nvmrc so a
+      # future GitHub bump can't break the audit silently.
       - uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e  # v6.4.0
         with:
           node-version-file: .nvmrc
diff --git a/.github/workflows/scorecard.yml b/.github/workflows/scorecard.yml
new file mode 100644
index 0000000..d07c57c
--- /dev/null
+++ b/.github/workflows/scorecard.yml
@@ -0,0 +1,88 @@
+name: Scorecard
+
+# OpenSSF Scorecard — weekly supply-chain hygiene grade for this repo.
+# Checks include: branch protection, pinned dependencies, signed releases,
+# token permissions, dangerous workflow patterns, dependency-update
+# tooling, vulnerability backlog, and code review coverage. Results post
+# to GitHub's Security tab as SARIF and (when publish_results is on) get
+# published to the public Scorecard registry at https://scorecard.dev.
+#
+# Required setup (one-time):
+#   - Settings → Code security → Enable "Code scanning" so the SARIF
+#     upload has somewhere to land. Without it the upload step no-ops.
+#
+# Runs on:
+#   - branch_protection_rule events (re-grades whenever protection changes)
+#   - schedule (weekly Monday 08:00 UTC — keeps the grade current as
+#     dependencies and Actions versions drift)
+#   - push to main (catches workflow changes immediately)
+#   - workflow_dispatch (manual re-run when investigating a finding)
+#
+# Note on PRs: Scorecard is intentionally NOT triggered on `pull_request`.
+# Every check Scorecard runs (branch protection state, pinned dependencies
+# in main, code-review-coverage history, vulnerability backlog) reflects
+# `main` as it currently sits — running on a PR would just re-grade main,
+# not preview the PR's effect. The weekly schedule + push-to-main triggers
+# are the right cadence.
+
+on:
+  branch_protection_rule:
+  schedule:
+    - cron: "0 8 * * 1"
+  push:
+    branches: [main]
+  workflow_dispatch:
+
+# Cancel an in-flight schedule/push run if a new one starts on the same ref.
+concurrency:
+  group: scorecard-${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+# Least-privilege default; the job opts up explicitly for SARIF upload +
+# OIDC publish.
+permissions: read-all
+
+jobs:
+  analysis:
+    name: Scorecard analysis
+    runs-on: ubuntu-24.04
+    permissions:
+      # Needed by github/codeql-action/upload-sarif to write Security tab
+      # entries.
+      security-events: write
+      # Needed by scorecard's `publish_results: true` — OIDC token proves
+      # to scorecard.dev that the run came from this repo.
+      id-token: write
+      contents: read
+      # Required for org-level scorecard repo discovery (no-op for a
+      # single-repo case, but the action documents it as required).
+      actions: read
+
+    steps:
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd  # v6.0.2
+        with:
+          persist-credentials: false
+
+      - name: Run Scorecard
+        uses: ossf/scorecard-action@4eaacf0543bb3f2c246792bd56e8cdeffafb205a  # v2.4.3
+        with:
+          results_file: results.sarif
+          results_format: sarif
+          # Publish to https://scorecard.dev so the badge + history are
+          # visible. Set to false to keep results private to the
+          # Security tab.
+          publish_results: true
+
+      # Retained for 7 days as a fallback when the Security tab view is
+      # truncated or the SARIF upload fails.
+      - name: Upload artifact
+        uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a  # v7.0.1
+        with:
+          name: SARIF file
+          path: results.sarif
+          retention-days: 7
+
+      - name: Upload to code-scanning
+        uses: github/codeql-action/upload-sarif@95e58e9a2cdfd71adc6e0353d5c52f41a045d225  # v4.35.2
+        with:
+          sarif_file: results.sarif
diff --git a/CLAUDE.md b/CLAUDE.md
index 6f8c110..d79c08f 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -41,11 +41,30 @@ This is a Next.js 15 marketing website for Vortex, a columnar file format. The s
 - `src/app/page.tsx` - Homepage with metadata for SEO
 - `src/components/hero/index.tsx` - Complex WebGL rendering with custom shaders
 - `src/app/layout.tsx` - Root layout with analytics providers and font loading
-- `next.config.ts` - Plausible proxy configuration
+- `next.config.mjs` - Plausible proxy configuration, security headers (CSP, HSTS, Permissions-Policy)
 
 The site is optimized for performance with font optimization, analytics integration, and responsive WebGL rendering.
 
-## Audit advisories
+## Supply chain hardening
+
+Defense in depth against the npm-worm class (Shai-Hulud, mini-Shai-Hulud, the May 2026 TanStack incident, etc.). Layers, in order of which one trips first when a bad package surfaces:
+
+1. **`bunfig.toml` → `install.minimumReleaseAge = 1209600`** (14 days). Bun refuses to resolve to a package version younger than 14 days. Applies to every `bun install` / `bun add` / `bun update` (local dev, lockfile regens, and Vercel builds), so we can't accidentally pull a freshly published version that hasn't had time to be observed. If a fresh dep is genuinely needed before the window elapses, allowlist it via `install.minimumReleaseAgeExcludes`.
+2. **`renovate.json` → `minimumReleaseAge: "14 days"`** — symmetric with #1, applied at PR-proposal time. Renovate won't open a PR for a version younger than the window, and `bunfig.toml` won't let Bun resolve to one either. Both gates are required: a local `bun add` bypasses Renovate; a Renovate `lockFileMaintenance` cycle would otherwise pull fresh transitives.
+3. **`trustedDependencies` in `package.json`** — explicit allowlist for which packages may run lifecycle scripts (`preinstall` / `install` / `postinstall`). Bun's default behavior is name-only trust against a built-in ~366-package allowlist, which lets a transitive named like a popular package hijack scripts (the PackageGate class of attack). Current set: `["esbuild", "sharp"]` — esbuild's `postinstall` builds its native bin (pulled in transitively via velite); sharp's `install` builds libvips for next/image. When adding a top-level dep that ships native bins or needs a build step, audit its lifecycle scripts via `bun pm untrusted`, then extend this list with one-line justification in the commit message.
+4. **`bun audit`** is the CI hard gate on every PR and push to main. When a new advisory surfaces, the resolution is one of three:
+    - **Direct dep bump** — if the advisory is in a top-level dep with a patched release, bump in `package.json`.
+    - **`overrides` entry** — if the advisory is in a transitive dep whose parent hasn't released a fix, force-pin the patched version in `package.json`'s `overrides` block. This is the most common case. Pick the latest patched version that is ≥14 days old (matching the cooldown policy) so a fresh install can't resolve to a too-new version.
+    - **Document and ignore** — if no upstream fix exists yet, append `--ignore=GHSA-...` to the `Dependency audit` step in `.github/workflows/ci.yml` and add an entry under "Audit advisories" below with: GHSA ID, vulnerable range, package, why exposure is acceptable (e.g. dev-only, not in client bundle), and a removal trigger.
+    - When a parent dep eventually patches its own transitive, drop the corresponding `overrides` entry — leaving stale overrides means we keep deduping a fix that was already merged upstream.
+5. **`actions/dependency-review-action`** runs on every PR — hard-fails the build if a PR introduces a new advisory at severity `high` or above. Catches what `bun audit` would catch on the merge commit, but earlier in the review loop.
+6. **`trufflesecurity/trufflehog`** secret scan runs on every PR and push to main. Defense-in-depth on top of GitHub's push protection; catches verified secrets that slipped past push protection (low-entropy formats, detector patterns added after the secret was committed, or push-protection bypass).
+7. **OpenSSF Scorecard** (`.github/workflows/scorecard.yml`) grades the repo weekly on supply-chain hygiene (pinned actions, branch protection, token permissions, dangerous workflow patterns). SARIF posts to the Security tab; aggregate score publishes to https://scorecard.dev.
+8. **All third-party GitHub Actions are SHA-pinned**, not tag-pinned. A tag can be moved to point at a malicious commit (and has been, in prior supply-chain incidents); a SHA can't. Renovate's `helpers:pinGitHubActionDigests` preset enforces this on auto-bump PRs. When bumping an action manually, update both the SHA and the trailing `# vX.Y.Z` comment in the same diff.
+9. **`runs-on: ubuntu-24.04`** (not `ubuntu-latest`) so runner-image bumps are deliberate PRs, not silent infrastructure drift. The Node version inside the runner image can still drift; `.nvmrc` pins that separately.
+10. **Renovate auto-merge** is patch + minor only via `:automergeStableNonMajor`. Major bumps stay open for human review. The 14-day cooldown is the first gate; CI (lint, build, typecheck, `bun audit`, `dependency-review`, `secret-scan`, `bun run verify`, Playwright, Lighthouse) is the second.
+
+### Audit advisories
 
 `bun audit` is the source of truth for dependency advisories. State as of 2026-05-04:
 
@@ -54,4 +73,4 @@ The site is optimized for performance with font optimization, analytics integrat
 - **uuid `<14.0.0`** (GHSA-w5hq-g745-h8pq, moderate missing buffer bounds in v3/v5/v6 when `buf` provided). **Upstream-blocked.** Two parent paths: `resend@6.12.2 → svix@1.90.0 → uuid@^10.0.0` and `@lhci/cli@0.15.1 → uuid@8.3.2`. Neither parent admits a 14.x override without risking CJS imports. Exposure is theoretical on both: `/api/subscribe` uses Resend's send-email endpoint (not svix's webhook-signing path), `@lhci/cli` is dev-only and runs in CI on its own controlled inputs, and the vulnerable code (v3/v5/v6 with explicit `buf`) isn't called by either. Remove the `--ignore` when both parents ship releases bumping uuid to `^14.0.0`.
 - **tmp `<=0.2.3`** (GHSA-52f5-9888-hmc6, low symbolic-link path traversal in `dir` param). **Upstream-blocked.** Pulled exclusively by `@lhci/cli@0.15.1` (dev-only, runs in CI on controlled inputs). The symlink-traversal scenario doesn't apply. Remove the `--ignore` when `@lhci/cli` ships a release with patched transitives.
 
-CI hard-gates on `bun audit` (`.github/workflows/ci.yml`) with `--ignore=GHSA-w5hq-g745-h8pq` and `--ignore=GHSA-52f5-9888-hmc6` for the upstream-blocked advisories. Any new advisory fails the job. The `dependency-review-action` PR job is a separate gate (license/severity-focused) that remains `continue-on-error: true` while a baseline of acceptable findings is established.
+CI hard-gates on `bun audit` (`.github/workflows/ci.yml`) with `--ignore=GHSA-w5hq-g745-h8pq` and `--ignore=GHSA-52f5-9888-hmc6` for the upstream-blocked advisories. Any new advisory fails the job.
diff --git a/README.md b/README.md
index f2d36c5..a9c101a 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,7 @@
 # vortex.dev
 
+[![OpenSSF Scorecard](https://api.scorecard.dev/projects/github.com/vortex-data/vortex.dev/badge)](https://scorecard.dev/viewer/?uri=github.com/vortex-data/vortex.dev)
+
 Source for [vortex.dev](https://vortex.dev), the marketing site for [Vortex](https://github.com/vortex-data/vortex) — an extensible, state-of-the-art columnar file format. Vortex is a [Linux Foundation](https://www.linuxfoundation.org/) incubating project, a Series of LF Projects, LLC.
 
 ## Local development
diff --git a/bun.lock b/bun.lock
index fa33bc6..10579fa 100644
--- a/bun.lock
+++ b/bun.lock
@@ -34,6 +34,10 @@
       },
     },
   },
+  "trustedDependencies": [
+    "sharp",
+    "esbuild",
+  ],
   "overrides": {
     "mdast-util-to-hast": "^13.2.1",
     "postcss": "8.5.10",
diff --git a/bunfig.toml b/bunfig.toml
new file mode 100644
index 0000000..33e9f81
--- /dev/null
+++ b/bunfig.toml
@@ -0,0 +1,16 @@
+# Bun configuration. Project-scoped — Bun merges this with $HOME/.bunfig.toml.
+
+[install]
+# Refuse to install package versions younger than 14 days. Mirrors the
+# Renovate minimumReleaseAge in renovate.json so a local `bun install`,
+# `bun add`, `bun update`, or a Vercel build can't pull a freshly
+# published (and potentially compromised) version that Renovate would
+# have held back.
+#
+# The window matters because npm worms (Shai-Hulud, mini-Shai-Hulud, the
+# May 2026 TanStack incident) propagate, get detected, and get yanked
+# within hours-to-days; 14 days is the observed safe horizon for those
+# events to have surfaced.
+#
+# Units: seconds. 14 * 86400 = 1209600.
+minimumReleaseAge = 1209600
diff --git a/package.json b/package.json
index 529f22b..d649250 100644
--- a/package.json
+++ b/package.json
@@ -50,6 +50,10 @@
     "tailwindcss": "4.2.3",
     "typescript": "^6.0.3"
   },
+  "trustedDependencies": [
+    "esbuild",
+    "sharp"
+  ],
   "overrides": {
     "postcss": "8.5.10",
     "mdast-util-to-hast": "^13.2.1"
diff --git a/renovate.json b/renovate.json
index 33536da..855583d 100644
--- a/renovate.json
+++ b/renovate.json
@@ -16,6 +16,7 @@
     "enabled": true
   },
   "automergeStrategy": "squash",
+  "minimumReleaseAge": "14 days",
   "rebaseWhen": "conflicted",
   "platformAutomerge": true,
   "labels": ["dependencies"],