ci(publish): publish without provenance from the self-hosted pool

.github/workflows/publish.yml

@@ -100,8 +100,11 @@ jobs:
       EXPECTED_VERSION: ${{ needs.verify.outputs.version }}
       EXPECTED_SHA256: ${{ needs.verify.outputs.sha256 }}
       RELEASE_TAG: ${{ needs.verify.outputs.tag }}
-      # The first scoped publication may use the organization NPM_TOKEN.
-      # Once npm Trusted Publishing is configured for this workflow, OIDC is tokenless.
+      # npm provenance and npm Trusted Publishing both reject a self-hosted
+      # runner ("Unsupported GitHub Actions runner environment"), and this
+      # organization has no GitHub-hosted runners, so publication uses the
+      # organization NPM_TOKEN and ships no sigstore attestation. The release
+      # evidence is the verify job, the SHA-256 receipt, and the tag identity.
       NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}
       GH_TOKEN: ${{ github.token }}
     steps:
@@ -132,7 +135,7 @@ jobs:
             || node -e 'process.exit(Object.values(JSON.parse(process.argv[1])).includes(process.argv[2]) ? 0 : 1)' "$tags" "$version"; then
             echo "$name@$version already published; skipping"
           else
-            npm publish "$package" --access public --provenance
+            npm publish "$package" --access public
           fi
       - name: Create immutable GitHub release
         run: |

CHANGELOG.md

@@ -26,6 +26,7 @@ All notable changes to Playproof are documented here.
 
 ### Continuous integration
 
+- Releases publish from the self-hosted pool without npm provenance: the registry rejects a sigstore bundle built on a self-hosted runner. The tag-to-commit check, the full gate, and the SHA-256 receipt on the GitHub release are the integrity evidence.
 - Every workflow job runs on the organization's self-hosted Linux pool with a per-job `uv` virtual environment and a per-job pnpm install directory; the real-emulator gates (Libbet on PyBoy, Airstriker on stable-retro, Breakout on ALE, CartPole and FrozenLake on Gymnasium) all run there.
 
 ## 0.2.0

docs/releasing.md

@@ -8,11 +8,8 @@ Playproof publishes one verified archive to npm and attaches the same archive an
 2. Enable GitHub Actions and branch protection for `main`.
 3. Ensure the `@tangle-network` npm organization permits public package publication.
 4. For the first publication, make the organization automation token available as the repository secret `NPM_TOKEN`.
-5. After `@tangle-network/playproof` exists on npm, configure npm Trusted Publishing for:
-   - organization: `tangle-network`;
-   - repository: `playproof`;
-   - workflow: `publish.yml`.
-6. Remove the token from the repository when OIDC publication is proven.
+5. Keep the token in place. npm provenance and npm Trusted Publishing both require a GitHub-hosted runner; they reject a self-hosted one with `Unsupported GitHub Actions runner environment`. This organization publishes from its own pool, so the package ships without a sigstore attestation.
+6. Configure npm Trusted Publishing only when GitHub-hosted runners are available to this repository again.
 
 ## Release gates
 
@@ -54,6 +51,10 @@ The equivalent free-ROM regression (`pnpm test:pyboy-libbet`) runs in CI on ever
 
 The workflow is idempotent: retrying an already-published version verifies the artifact identity and skips the npm mutation.
 
+## Release integrity without provenance
+
+A release carries four pieces of evidence instead of a sigstore attestation: the tag resolves to the exact commit the verify job checked out, `package.json` version equals the tag, the complete gate passed on that tree, and the SHA-256 of the one archive that was built is recorded in `SHA256SUMS` on the GitHub release next to the archive itself. Compare the digest of the npm tarball with that receipt to confirm the registry holds the artifact this repository built.
+
 ## Prohibited release paths
 
 - Do not publish from a developer laptop.

package.json

@@ -30,8 +30,7 @@
     "claude-code"
   ],
   "publishConfig": {
-    "access": "public",
-    "provenance": true
+    "access": "public"
   },
   "engines": {
     "node": ">=20.19"