delinoio · kdy1 · Apr 7, 2026 · Apr 7, 2026
diff --git a/apps/public-docs/derun.mdx b/apps/public-docs/derun.mdx
@@ -43,6 +43,8 @@ Script installer:
 ./scripts/install/derun.ps1 -Version latest -Method direct
 ```
 
+Direct installers verify Sigstore bundle sidecars (`*.sigstore.json`) and only support bundle-enabled releases.
+
 ## Quick start
 
 Run a command with transcript capture:

diff --git a/apps/public-docs/dexdex.mdx b/apps/public-docs/dexdex.mdx
@@ -44,6 +44,8 @@ Script installer:
 ./scripts/install/dexdex-stack.ps1 -Version latest -Method direct
 ```
 
+Direct installers verify Sigstore bundle sidecars (`*.sigstore.json`) and only support bundle-enabled releases.
+
 ## Related pages
 
 - [Projects Overview](projects-overview)

diff --git a/apps/public-docs/nodeup.mdx b/apps/public-docs/nodeup.mdx
@@ -42,6 +42,8 @@ Script installer:
 ./scripts/install/nodeup.ps1 -Version latest -Method direct
 ```
 
+Direct installers verify Sigstore bundle sidecars (`*.sigstore.json`) and only support bundle-enabled releases.
+
 ## Common workflows
 
 Set a global default runtime:

diff --git a/docs/cmds-derun-foundation.md b/docs/cmds-derun-foundation.md
@@ -19,9 +19,11 @@
 - Release artifact contract for distribution tooling:
   - Required asset names: `derun-linux-amd64.tar.gz`, `derun-darwin-amd64.tar.gz`, `derun-darwin-arm64.tar.gz`, `derun-windows-amd64.zip`.
   - Required build matrix: `linux/amd64`, `darwin/amd64`, `darwin/arm64`, `windows/amd64`.
+  - Required signing sidecars: `SHA256SUMS.sigstore.json` and `<artifact>.sigstore.json`.
 - Homebrew `derun` formula contract:
   - Must install from GitHub release prebuilt tarballs (darwin amd64/arm64 and linux amd64).
   - Linux arm64 must fail explicitly as unsupported until a dedicated artifact is added.
+- Direct install scripts must verify release artifacts with `SHA256SUMS` and Sigstore bundle sidecars via `cosign verify-blob --bundle`.
 - User-facing error messages must remain single-line and follow stable style contracts:
   - Usage/validation: `invalid arguments: <reason>; details: <k=v,...>; hint: <how to fix>`
   - Runtime: `failed to <action>: <cause>; details: <k=v,...>`

diff --git a/docs/crates-cargo-mono-foundation.md b/docs/crates-cargo-mono-foundation.md
@@ -66,11 +66,12 @@
 - Workspace validation baseline: `cargo test --workspace --all-targets`
 - CI alignment: `.github/workflows/CI.yml` Rust jobs
 - Release contract checks should align with `.github/workflows/release-cargo-mono.yml`.
+- Release signing outputs must use Sigstore bundle sidecars (`SHA256SUMS.sigstore.json` and `<artifact>.sigstore.json`).
 
 ## Dependencies and Integrations
 - Integrates with Cargo workspace metadata and release workflows.
 - Integrates with root automation (`auto-publish`) through stable command contracts, including CI-driven tag publication.
-- Integrates with tag-based binary distribution automation (`release-cargo-mono`) through stable artifact naming and signing contracts.
+- Integrates with tag-based binary distribution automation (`release-cargo-mono`) through stable artifact naming and bundle-signing contracts.
 
 ## Change Triggers
 - Update `docs/project-cargo-mono.md` with this file when command identifiers or ownership changes.

diff --git a/docs/crates-nodeup-foundation.md b/docs/crates-nodeup-foundation.md
@@ -18,6 +18,7 @@
 - Shim dispatch behavior must remain deterministic by executable name (`node`, `npm`, `npx`, `yarn`, `pnpm`).
 - Install/update command surfaces must preserve backward-compatible flags and outputs.
 - Homebrew installation must consume prebuilt release archives for `darwin/amd64`, `darwin/arm64`, and `linux/amd64`; Linux arm64 must fail with a clear unsupported-platform message.
+- Direct install scripts must verify release artifacts with `SHA256SUMS` and Sigstore bundle sidecars (`<artifact>.sigstore.json`) via `cosign verify-blob --bundle`.
 - `yarn`/`pnpm` delegated execution must honor nearest `package.json` `packageManager` when present.
 - `packageManager` parsing contract is strict: `<manager>@<exact-semver>` with manager limited to `yarn|pnpm`.
 - `packageManager` manager-command mismatch must fail with `conflict`; malformed values must fail with `invalid-input`.
@@ -53,6 +54,7 @@
 - Workspace baseline: `cargo test --workspace --all-targets`
 - Release contract checks should align with `release-nodeup` workflow expectations.
 - Release assets must include both standalone prebuilt binaries (`nodeup-<os>-<arch>[.exe]`) and compressed archives (`nodeup-<os>-<arch>.tar.gz|zip`) for the supported release matrix.
+- Release signing outputs must include `SHA256SUMS.sigstore.json` and `<artifact>.sigstore.json` sidecars; legacy `.sig`/`.pem` sidecars are out of scope for direct installation.
 - Homebrew release automation must render the prebuilt formula from release asset URLs and push tap updates directly to `delinoio/homebrew-tap` `main` with a dedicated tap-write credential.
 - Completion coverage must include successful script generation, invalid shell/scope validation, and JSON-mode raw output behavior.
 - Output color coverage must include flag/env precedence, invalid env fallback, stream-aware auto-mode behavior, and JSON/completion ANSI exclusion.

diff --git a/docs/project-cargo-mono.md b/docs/project-cargo-mono.md
@@ -21,7 +21,7 @@ Provide a Cargo subcommand for Rust monorepo lifecycle management, including ver
 - `publish` retry overrides must remain operator-controlled through `--max-attempts <count>` and `CARGO_MONO_PUBLISH_MAX_ATTEMPTS`, with precedence `--max-attempts` > env > default unlimited retries.
 - Remote tag publication remains CI-owned: `auto-publish` pushes release tags with `git push --tags` after a successful `publish` run, with checkout credential persistence disabled and authentication bound to `secrets.GH_TOKEN` (non-`GITHUB_TOKEN`) so downstream tag-triggered workflows run.
 - Publish tag configuration must be opt-in through `[workspace.metadata.cargo-mono.publish.tag].packages`, and tag naming must remain `<crate>@v<version>`.
-- Tag release automation must detect `cargo-mono@v*` and produce signed multi-OS prebuilt artifacts without changing CLI command behavior.
+- Tag release automation must detect `cargo-mono@v*` and produce signed multi-OS prebuilt artifacts with Sigstore bundle sidecars (`*.sigstore.json`) without changing CLI command behavior.
 - Runtime failure messaging must follow the `Summary/Context/Hint` three-line contract while command behavior, output schema, and exit code semantics remain stable.
 - Dependency-cycle conflicts in package ordering must identify cycle package names and dependency scope in `Context` without changing CLI flags, command behavior, or JSON output schema.
 - Human output color controls must remain stable: global `--color <auto|always|never>`, `CARGO_MONO_OUTPUT_COLOR`, and `NO_COLOR` with precedence `--color` > `CARGO_MONO_OUTPUT_COLOR` > `NO_COLOR` > auto-detection.

diff --git a/docs/project-derun.md b/docs/project-derun.md
@@ -18,12 +18,14 @@ Provide a Go CLI that preserves terminal fidelity for AI-agent workflows and bri
 - User-facing error messages must remain single-line and include deterministic `details` segments with safe diagnostic fields only (no secrets).
 - User-facing error messages must preserve compatibility tokens used by MCP/automation integrations (`session not found`, `parse <field>`, `session_id is required`, `cursor is required`).
 - Release artifact matrix and names must remain stable: `derun-linux-amd64.tar.gz`, `derun-darwin-amd64.tar.gz`, `derun-darwin-arm64.tar.gz`, `derun-windows-amd64.zip`.
+- Release signing must publish Sigstore bundle sidecars (`*.sigstore.json`) for each artifact and `SHA256SUMS`, and direct installers only support bundle-enabled releases.
 - Homebrew distribution must install `derun` from GitHub release prebuilt archives (darwin amd64/arm64 and linux amd64) instead of source builds.
 
 ## Change Policy
 - Update this index and `docs/cmds-derun-foundation.md` together whenever command shape or runtime contracts change.
 - Update this index and `docs/cmds-derun-foundation.md` together whenever user-facing error message contracts or compatibility tokens change.
 - Update `.github/workflows/release-derun.yml`, `scripts/release/update-homebrew.sh`, and `packaging/homebrew/templates/derun.rb.tmpl` in the same change when derun release artifact names, target matrix, or package-manager distribution contracts change.
+- Keep direct installer contracts in `scripts/install/derun.sh` and `scripts/install/derun.ps1` synchronized with release signing changes.
 - Align command lifecycle changes with `cmds/AGENTS.md` and root `AGENTS.md`.
 
 ## References

diff --git a/docs/project-dexdex.md b/docs/project-dexdex.md
@@ -139,7 +139,8 @@ Recommended runtime environment keys:
 
 ## Release Distribution Contracts
 - Release workflow: `.github/workflows/release-dexdex.yml`.
-- GitHub Releases publish signed desktop and server artifacts (`SHA256SUMS` + cosign signatures).
+- GitHub Releases publish signed desktop and server artifacts (`SHA256SUMS` + `.sigstore.json` bundle sidecars).
+- Direct installers verify Sigstore bundle sidecars and only support bundle-enabled releases.
 - Homebrew distribution:
   - `dexdex` cask consumes the macOS desktop DMG release artifact.
   - `dexdex-main-server` and `dexdex-worker-server` formulas consume prebuilt server release artifacts for `darwin/amd64`, `darwin/arm64`, and `linux/amd64`.

diff --git a/docs/project-nodeup.md b/docs/project-nodeup.md
@@ -18,7 +18,8 @@ Provide a Rust-based Node.js version manager with predictable channel resolution
 - `package.json` `packageManager` support for `yarn|pnpm` must remain strict and deterministic.
 - Shell completion generation must remain deterministic for supported shells and top-level command scopes.
 - Human output styling controls (`--color`, `NODEUP_COLOR`, and `NO_COLOR` precedence) must remain stable across CLI and public documentation.
-- Release automation must publish both standalone prebuilt binaries and archive assets for the supported OS/architecture matrix.
+- Release automation must publish both standalone prebuilt binaries and archive assets for the supported OS/architecture matrix, plus Sigstore bundle sidecars (`*.sigstore.json`) for each artifact and `SHA256SUMS`.
+- Direct installers must verify `SHA256SUMS` entries and Sigstore bundle sidecars, and only support bundle-enabled releases.
 - Homebrew installation must use prebuilt `nodeup` release archives for `darwin/amd64`, `darwin/arm64`, and `linux/amd64`, while failing clearly for unsupported Linux arm64 hosts.
 
 ## Change Policy

diff --git a/scripts/install/README.md b/scripts/install/README.md
@@ -4,6 +4,8 @@ Cross-platform install scripts with the shared interface:
 
 - `--version <semver|latest>`
 - `--method package-manager|direct`
+- `direct` verifies `SHA256SUMS` plus Sigstore bundle sidecars (`*.sigstore.json`)
+- Older releases that only published legacy `.sig`/`.pem` files are not supported in direct mode
 
 Scripts:
 

diff --git a/scripts/install/derun.ps1 b/scripts/install/derun.ps1
@@ -48,20 +48,33 @@ function Verify-Checksum {
   }
 }
 
-function Verify-Signature {
+function Download-Bundle {
+  param(
+    [string]$BaseUrl,
+    [string]$AssetName,
+    [string]$BundlePath
+  )
+
+  try {
+    Invoke-WebRequest -Uri "$BaseUrl/$AssetName.sigstore.json" -OutFile $BundlePath
+  }
+  catch {
+    throw "[install.derun] direct installs require releases published with Sigstore bundle sidecars"
+  }
+}
+
+function Verify-Bundle {
   param(
     [string]$FilePath,
-    [string]$SignaturePath,
-    [string]$CertificatePath
+    [string]$BundlePath
   )
 
   if (-not (Get-Command cosign -ErrorAction SilentlyContinue)) {
     throw "[install.derun] cosign is required for direct installation"
   }
 
   cosign verify-blob `
-    --certificate $CertificatePath `
-    --signature $SignaturePath `
+    --bundle $BundlePath `
     --certificate-identity-regexp $WorkflowIdentityPattern `
     --certificate-oidc-issuer "https://token.actions.githubusercontent.com" `
     $FilePath | Out-Null
@@ -78,17 +91,15 @@ function Install-Direct {
   try {
     $assetPath = Join-Path $tmpDir $assetName
     $sumsPath = Join-Path $tmpDir "SHA256SUMS"
-    $signaturePath = "$assetPath.sig"
-    $certificatePath = "$assetPath.pem"
+    $bundlePath = "$assetPath.sigstore.json"
 
     Write-Host "[install.derun] downloading $assetName"
     Invoke-WebRequest -Uri "$baseUrl/$assetName" -OutFile $assetPath
     Invoke-WebRequest -Uri "$baseUrl/SHA256SUMS" -OutFile $sumsPath
-    Invoke-WebRequest -Uri "$baseUrl/$assetName.sig" -OutFile $signaturePath
-    Invoke-WebRequest -Uri "$baseUrl/$assetName.pem" -OutFile $certificatePath
+    Download-Bundle -BaseUrl $baseUrl -AssetName $assetName -BundlePath $bundlePath
 
     Verify-Checksum -FilePath $assetPath -Sha256SumsPath $sumsPath -AssetName $assetName
-    Verify-Signature -FilePath $assetPath -SignaturePath $signaturePath -CertificatePath $certificatePath
+    Verify-Bundle -FilePath $assetPath -BundlePath $bundlePath
 
     $extractDir = Join-Path $tmpDir "extract"
     Expand-Archive -Path $assetPath -DestinationPath $extractDir -Force

diff --git a/scripts/install/derun.sh b/scripts/install/derun.sh
@@ -90,7 +90,19 @@ install_via_package_manager() {
   return 1
 }
 
-verify_signature() {
+download_bundle() {
+  local base_url="$1"
+  local artifact="$2"
+  local bundle_name="${artifact}.sigstore.json"
+
+  if ! curl -fsSLO "${base_url}/${bundle_name}"; then
+    echo "[install.derun] missing bundle sidecar: ${bundle_name}" >&2
+    echo "[install.derun] direct installs require releases published with Sigstore bundle sidecars" >&2
+    exit 1
+  fi
+}
+
+verify_bundle() {
   local artifact="$1"
 
   if ! command -v cosign >/dev/null 2>&1; then
@@ -99,8 +111,7 @@ verify_signature() {
   fi
 
   cosign verify-blob \
-    --certificate "${artifact}.pem" \
-    --signature "${artifact}.sig" \
+    --bundle "${artifact}.sigstore.json" \
     --certificate-identity-regexp "$workflow_identity" \
     --certificate-oidc-issuer "https://token.actions.githubusercontent.com" \
     "$artifact"
@@ -162,12 +173,11 @@ install_direct() {
   echo "[install.derun] downloading artifact: $asset_name" >&2
   curl -fsSLO "${base_url}/${asset_name}"
   curl -fsSLO "${base_url}/SHA256SUMS"
-  curl -fsSLO "${base_url}/${asset_name}.sig"
-  curl -fsSLO "${base_url}/${asset_name}.pem"
+  download_bundle "$base_url" "$asset_name"
 
   grep " ${asset_name}$" SHA256SUMS > SHA256SUMS.derun
   shasum -a 256 -c SHA256SUMS.derun
-  verify_signature "$asset_name"
+  verify_bundle "$asset_name"
 
   tar -xzf "$asset_name"
 

diff --git a/scripts/install/dexdex-stack.ps1 b/scripts/install/dexdex-stack.ps1
@@ -48,20 +48,33 @@ function Verify-Checksum {
   }
 }
 
-function Verify-Signature {
+function Download-Bundle {
+  param(
+    [string]$BaseUrl,
+    [string]$AssetName,
+    [string]$BundlePath
+  )
+
+  try {
+    Invoke-WebRequest -Uri "$BaseUrl/$AssetName.sigstore.json" -OutFile $BundlePath
+  }
+  catch {
+    throw "[install.dexdex] direct installs require releases published with Sigstore bundle sidecars"
+  }
+}
+
+function Verify-Bundle {
   param(
     [string]$FilePath,
-    [string]$SignaturePath,
-    [string]$CertificatePath
+    [string]$BundlePath
   )
 
   if (-not (Get-Command cosign -ErrorAction SilentlyContinue)) {
     throw "[install.dexdex] cosign is required for direct installation"
   }
 
   cosign verify-blob `
-    --certificate $CertificatePath `
-    --signature $SignaturePath `
+    --bundle $BundlePath `
     --certificate-identity-regexp $WorkflowIdentityPattern `
     --certificate-oidc-issuer "https://token.actions.githubusercontent.com" `
     $FilePath | Out-Null
@@ -76,15 +89,13 @@ function Download-AndVerify {
   )
 
   $assetPath = Join-Path $TempDir $AssetName
-  $signaturePath = "$assetPath.sig"
-  $certificatePath = "$assetPath.pem"
+  $bundlePath = "$assetPath.sigstore.json"
 
   Invoke-WebRequest -Uri "$BaseUrl/$AssetName" -OutFile $assetPath
-  Invoke-WebRequest -Uri "$BaseUrl/$AssetName.sig" -OutFile $signaturePath
-  Invoke-WebRequest -Uri "$BaseUrl/$AssetName.pem" -OutFile $certificatePath
+  Download-Bundle -BaseUrl $BaseUrl -AssetName $AssetName -BundlePath $bundlePath
 
   Verify-Checksum -FilePath $assetPath -Sha256SumsPath $Sha256SumsPath -AssetName $AssetName
-  Verify-Signature -FilePath $assetPath -SignaturePath $signaturePath -CertificatePath $certificatePath
+  Verify-Bundle -FilePath $assetPath -BundlePath $bundlePath
 
   return $assetPath
 }

diff --git a/scripts/install/dexdex-stack.sh b/scripts/install/dexdex-stack.sh
@@ -79,7 +79,19 @@ resolve_tag() {
   printf '%s%s\n' "$tag_prefix" "$version"
 }
 
-verify_signature() {
+download_bundle() {
+  local base_url="$1"
+  local artifact="$2"
+  local bundle_name="${artifact}.sigstore.json"
+
+  if ! curl -fsSLO "${base_url}/${bundle_name}"; then
+    echo "[install.dexdex] missing bundle sidecar: ${bundle_name}" >&2
+    echo "[install.dexdex] direct installs require releases published with Sigstore bundle sidecars" >&2
+    exit 1
+  fi
+}
+
+verify_bundle() {
   local artifact="$1"
 
   if ! command -v cosign >/dev/null 2>&1; then
@@ -88,8 +100,7 @@ verify_signature() {
   fi
 
   cosign verify-blob \
-    --certificate "${artifact}.pem" \
-    --signature "${artifact}.sig" \
+    --bundle "${artifact}.sigstore.json" \
     --certificate-identity-regexp "$workflow_identity" \
     --certificate-oidc-issuer "https://token.actions.githubusercontent.com" \
     "$artifact"
@@ -100,12 +111,11 @@ download_and_verify() {
   local asset_name="$2"
 
   curl -fsSLO "${base_url}/${asset_name}"
-  curl -fsSLO "${base_url}/${asset_name}.sig"
-  curl -fsSLO "${base_url}/${asset_name}.pem"
+  download_bundle "$base_url" "$asset_name"
 
   grep " ${asset_name}$" SHA256SUMS > "SHA256SUMS.${asset_name}"
   shasum -a 256 -c "SHA256SUMS.${asset_name}"
-  verify_signature "$asset_name"
+  verify_bundle "$asset_name"
 }
 
 install_via_package_manager() {

diff --git a/scripts/install/nodeup.ps1 b/scripts/install/nodeup.ps1
@@ -48,20 +48,33 @@ function Verify-Checksum {
   }
 }
 
-function Verify-Signature {
+function Download-Bundle {
+  param(
+    [string]$BaseUrl,
+    [string]$AssetName,
+    [string]$BundlePath
+  )
+
+  try {
+    Invoke-WebRequest -Uri "$BaseUrl/$AssetName.sigstore.json" -OutFile $BundlePath
+  }
+  catch {
+    throw "[install.nodeup] direct installs require releases published with Sigstore bundle sidecars"
+  }
+}
+
+function Verify-Bundle {
   param(
     [string]$FilePath,
-    [string]$SignaturePath,
-    [string]$CertificatePath
+    [string]$BundlePath
   )
 
   if (-not (Get-Command cosign -ErrorAction SilentlyContinue)) {
     throw "[install.nodeup] cosign is required for direct installation"
   }
 
   cosign verify-blob `
-    --certificate $CertificatePath `
-    --signature $SignaturePath `
+    --bundle $BundlePath `
     --certificate-identity-regexp $WorkflowIdentityPattern `
     --certificate-oidc-issuer "https://token.actions.githubusercontent.com" `
     $FilePath | Out-Null
@@ -78,17 +91,15 @@ function Install-Direct {
   try {
     $assetPath = Join-Path $tmpDir $assetName
     $sumsPath = Join-Path $tmpDir "SHA256SUMS"
-    $signaturePath = "$assetPath.sig"
-    $certificatePath = "$assetPath.pem"
+    $bundlePath = "$assetPath.sigstore.json"
 
     Write-Host "[install.nodeup] downloading $assetName"
     Invoke-WebRequest -Uri "$baseUrl/$assetName" -OutFile $assetPath
     Invoke-WebRequest -Uri "$baseUrl/SHA256SUMS" -OutFile $sumsPath
-    Invoke-WebRequest -Uri "$baseUrl/$assetName.sig" -OutFile $signaturePath
-    Invoke-WebRequest -Uri "$baseUrl/$assetName.pem" -OutFile $certificatePath
+    Download-Bundle -BaseUrl $baseUrl -AssetName $assetName -BundlePath $bundlePath
 
     Verify-Checksum -FilePath $assetPath -Sha256SumsPath $sumsPath -AssetName $assetName
-    Verify-Signature -FilePath $assetPath -SignaturePath $signaturePath -CertificatePath $certificatePath
+    Verify-Bundle -FilePath $assetPath -BundlePath $bundlePath
 
     $extractDir = Join-Path $tmpDir "extract"
     Expand-Archive -Path $assetPath -DestinationPath $extractDir -Force