diff --git a/.github/CODEOWNERS b/.github/CODEOWNERS
index 7a7f660b..75f51eb3 100644
--- a/.github/CODEOWNERS
+++ b/.github/CODEOWNERS
@@ -1 +1,13 @@
 * @darkroomengineering/devs
+
+# Release-critical paths. Changes here can compromise the supply chain
+# (workflow swap, manifest tampering, registry config). Reviewers should
+# verify that any modification is intentional and does not weaken the
+# publish pipeline. Replace with a smaller `release-admins` team once
+# one exists.
+/.github/workflows/    @darkroomengineering/devs
+/.github/CODEOWNERS    @darkroomengineering/devs
+/.github/dependabot.yml @darkroomengineering/devs
+/package.json          @darkroomengineering/devs
+/.npmrc                @darkroomengineering/devs
+/SECURITY.md           @darkroomengineering/devs
diff --git a/.github/dependabot.yml b/.github/dependabot.yml
index dbdf455c..185044ce 100644
--- a/.github/dependabot.yml
+++ b/.github/dependabot.yml
@@ -1,12 +1,30 @@
-# To get started with Dependabot version updates, you'll need to specify which
-# package ecosystems to update and where the package manifests are located.
-# Please see the documentation for all configuration options:
-# https://help.github.com/github/administering-a-repository/configuration-options-for-dependency-updates
-
-
 version: 2
 updates:
-  - package-ecosystem: "github-actions" # See documentation for possible values
-    directory: "/" # Location of package manifests
+  # Track new versions of GitHub Actions. Dependabot rewrites SHA-pinned actions
+  # back to the new SHA, preserving the pinning policy in release.yml.
+  - package-ecosystem: "github-actions"
+    directory: "/"
     schedule:
       interval: "daily"
+    groups:
+      actions:
+        patterns:
+          - "*"
+
+  # Track advisories on npm dev dependencies. Grouped to reduce PR noise.
+  - package-ecosystem: "npm"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+    open-pull-requests-limit: 5
+    groups:
+      dev-dependencies:
+        dependency-type: "development"
+        update-types:
+          - "minor"
+          - "patch"
+    ignore:
+      # Peer deps — bumping these in this repo doesn't change what consumers get.
+      - dependency-name: "react"
+      - dependency-name: "vue"
+      - dependency-name: "@nuxt/kit"
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
new file mode 100644
index 00000000..9efa015a
--- /dev/null
+++ b/.github/workflows/release.yml
@@ -0,0 +1,90 @@
+name: Release
+
+# Publishes `lenis` to npm with build provenance and OIDC-based Trusted Publishing.
+# No long-lived NPM_TOKEN exists in this repository or in GitHub Actions secrets:
+# the npm CLI exchanges a short-lived GitHub OIDC token for a publish credential at
+# the moment of publish, scoped to this workflow file in this repository.
+#
+# Prerequisites (one-time setup on npmjs.com, see SECURITY.md):
+#   - Configure `lenis` with a Trusted Publisher pointing at:
+#       repository:    darkroomengineering/lenis
+#       workflow file: .github/workflows/release.yml
+#   - Revoke every classic / automation npm token after the first successful run.
+
+on:
+  push:
+    tags:
+      - 'v*'
+
+# Minimum permissions for the whole workflow. The publish job widens to id-token:write.
+permissions:
+  contents: read
+
+concurrency:
+  group: release-${{ github.ref }}
+  cancel-in-progress: false
+
+jobs:
+  publish:
+    name: Publish to npm
+    runs-on: ubuntu-latest
+    timeout-minutes: 10
+    permissions:
+      contents: read
+      id-token: write   # Required for npm Trusted Publishing + provenance attestations.
+
+    steps:
+      # Restrict outbound network from the runner so a compromised dep can't exfiltrate.
+      # Start in `audit` mode; tighten to `block` after observing allowed endpoints.
+      - name: Harden runner
+        uses: step-security/harden-runner@a5ad31d6a139d249332a2605b85202e8c0b78450 # v2.19.1
+        with:
+          egress-policy: audit
+          disable-sudo: true
+
+      - name: Checkout
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          persist-credentials: false
+
+      - name: Setup Bun
+        uses: oven-sh/setup-bun@0c5077e51419868618aeaa5fe8019c62421857d6 # v2.2.0
+        with:
+          bun-version: 1.3.13
+
+      - name: Setup Node
+        uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6.4.0
+        with:
+          node-version: 22
+          registry-url: 'https://registry.npmjs.org'
+
+      # Trusted Publishing requires npm >= 11.5.1; Node 22 ships with npm 10.x.
+      - name: Upgrade npm to a Trusted-Publishing-capable version
+        run: npm install -g npm@latest
+
+      # Refuse to publish if the git tag and package.json version disagree.
+      # Prevents an attacker who can push a tag from publishing an arbitrary version.
+      - name: Verify tag matches package.json version
+        run: |
+          PKG_VERSION="v$(node -p "require('./package.json').version")"
+          if [ "${GITHUB_REF_NAME}" != "${PKG_VERSION}" ]; then
+            echo "::error::Tag ${GITHUB_REF_NAME} does not match package.json version ${PKG_VERSION}"
+            exit 1
+          fi
+
+      - name: Install dependencies
+        run: bun install --frozen-lockfile
+
+      - name: Build
+        run: bun run build
+
+      # Refuse to publish if dist/ is missing or empty after the build.
+      - name: Verify build output
+        run: |
+          if [ ! -d dist ] || [ -z "$(ls -A dist)" ]; then
+            echo "::error::dist/ is missing or empty after build"
+            exit 1
+          fi
+
+      - name: Publish to npm
+        run: npm publish --provenance --access public
diff --git a/.gitignore b/.gitignore
index 8f2291dd..0863f97f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -36,7 +36,10 @@ yarn-error.log*
 .vercel
 .eslintcache
 
+# Keep root /.npmrc tracked (provenance=true setting, no secrets).
+# Ignore nested .npmrc files where auth tokens may end up.
 .npmrc
+!/.npmrc
 
 
 packages/core/dist/
diff --git a/.npmrc b/.npmrc
new file mode 100644
index 00000000..d308232f
--- /dev/null
+++ b/.npmrc
@@ -0,0 +1,2 @@
+; Redundant with publishConfig.provenance in package.json, kept for defense in depth.
+provenance=true
diff --git a/SECURITY.md b/SECURITY.md
new file mode 100644
index 00000000..a6d276e3
--- /dev/null
+++ b/SECURITY.md
@@ -0,0 +1,120 @@
+# Security Policy
+
+## Reporting a vulnerability
+
+Please **do not** open public GitHub issues for security problems. Email
+`hello@darkroom.engineering` or use GitHub's
+[private vulnerability reporting](https://github.com/darkroomengineering/lenis/security/advisories/new)
+on this repository.
+
+We aim to acknowledge reports within three business days.
+
+## Supply-chain hardening
+
+`lenis` is published to npm via a hardened pipeline designed to make
+credential theft and tarball tampering ineffective.
+
+The protections in this repository:
+
+- **No long-lived npm token exists.** Publishing runs only from
+  `.github/workflows/release.yml`, which uses npm Trusted Publishing
+  (OIDC) to mint a short-lived publish credential at the moment of
+  publish. There is no `NPM_TOKEN` in GitHub Actions secrets, in CI, on
+  any maintainer's machine, or in a password manager.
+- **Build provenance.** Every published tarball ships with an [npm
+  provenance attestation](https://docs.npmjs.com/generating-provenance-statements)
+  cryptographically tied to this repository, the workflow file, the
+  commit, and the runner. Consumers can verify provenance with
+  `npm audit signatures` (see below).
+- **Tag-protected releases.** The workflow only runs on tag pushes
+  matching `v*` and refuses to publish unless the tag matches the
+  version in `package.json`.
+- **Workflow integrity.** All GitHub Actions are pinned to commit SHAs
+  (not floating tags). Dependabot updates SHAs in PRs that go through
+  CODEOWNERS review.
+- **Local `npm publish` is removed.** `package.json` no longer carries
+  `publish:main` / `publish:dev` scripts. There is no sanctioned path
+  to publish from a developer machine.
+- **CODEOWNERS** requires review on `.github/`, `package.json`, `.npmrc`,
+  and this file — anything that could weaken the pipeline.
+- **`files` allowlist** in `package.json` limits the published tarball
+  to `dist/` only; nothing else from the working tree is shipped.
+
+## One-time setup (must be done outside the repository)
+
+These steps cannot be encoded in repository files. A maintainer with admin
+rights on the npm package and the GitHub repository must do them once.
+After completion, audit them annually.
+
+### On npmjs.com
+
+1. **Confirm two-factor authentication is enforced for writes** on the
+   account or org that owns `lenis` on npm, and on every account with
+   publish rights to it.
+2. **Configure Trusted Publisher** for `lenis`:
+   - Settings → Publishing access → "Enable Trusted Publisher"
+   - Publisher: GitHub Actions
+   - Repository: `darkroomengineering/lenis`
+   - Workflow filename: `.github/workflows/release.yml`
+   - Environment name: *(leave blank unless using GitHub Environments)*
+3. **After the first OIDC-based publish succeeds** and the latest
+   version shows a provenance attestation, set the Publishing access
+   policy on `lenis` to **"Require two-factor authentication and
+   disallow tokens"** (the recommended option on
+   Settings → Publishing access). This forbids any token-based
+   publish path. Do not enable this before a successful OIDC publish,
+   or there will be no fallback if Trusted Publisher is misconfigured.
+4. **Confirm no long-lived publish tokens remain** for the `lenis`
+   package.
+
+### On github.com
+
+1. **Branch protection on `main`**:
+   - Require a pull request before merging
+   - Require review from CODEOWNERS
+   - Require signed commits
+   - Restrict who can push (no direct push to `main`)
+   - Block force pushes and deletions
+2. **Tag protection** for `v*`: restrict who can create release tags to
+   the same group that can approve releases.
+3. **Restrict workflow permissions** (Settings → Actions → General):
+   - Workflow permissions: "Read repository contents and packages permissions"
+   - Allow GitHub Actions to create and approve pull requests: off
+4. **Secret scanning + push protection**: on.
+
+## Release flow (for maintainers)
+
+```bash
+bun run version:patch      # or version:minor / version:major
+git add package.json
+git commit -m "v$(node -p "require('./package.json').version")"
+git tag "v$(node -p "require('./package.json').version")"
+git push --follow-tags
+```
+
+The tag push triggers `.github/workflows/release.yml`, which builds and
+publishes. Nothing else publishes; if you ever feel the urge to run
+`npm publish` locally, stop and investigate why the workflow isn't
+working instead.
+
+## Verifying a published version (for consumers)
+
+After installing `lenis`, verify provenance and signatures:
+
+```bash
+npm audit signatures
+```
+
+You should see `lenis` listed under "verified registry signatures" with
+a "provenance" attestation pointing at `github.com/darkroomengineering/lenis`
+and a specific commit SHA. If provenance is missing, the version was not
+published through the trusted pipeline — treat as suspect, do not run
+`postinstall`, and report it through the channel above.
+
+To inspect provenance for a specific version without installing:
+
+```bash
+npm view lenis@<version> --json | jq '.dist'
+```
+
+The `attestations` block lists the provenance bundle URL.
diff --git a/package.json b/package.json
index 82b7f781..7b957751 100644
--- a/package.json
+++ b/package.json
@@ -42,8 +42,12 @@
     "version:minor": "npm version minor --force --no-git-tag-version",
     "version:major": "npm version major --force --no-git-tag-version",
     "postversion": "bun run build && bun run readme",
-    "publish:dev": "npm publish --tag dev",
-    "publish:main": "npm publish"
+    "prepublishOnly": "bun run build"
+  },
+  "packageManager": "bun@1.3.13",
+  "publishConfig": {
+    "access": "public",
+    "provenance": true
   },
   "files": [
     "dist"