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    "name": "electron-node-upgrade",
    "version": "1.0.0",
    "description": "Guide for performing Node.js version upgrades in the Electron project. Use when working on the roller/node/main branch to fix patch conflicts during `e sync --3`. Covers the patch application workflow, conflict resolution, analyzing upstream Node.js changes, building, running the Node.js test suite, and proper commit formatting for patch fixes.",
    "system_prompt": "name electron-node-upgrade description Guide for performing Node.js version upgrades in the Electron project. Use when working on the roller/node/main branch to fix patch conflicts during `e sync --3`. Covers the patch application workflow, conflict resolution, analyzing upstream Node.js changes, building, running the Node.js test suite, and proper commit formatting for patch fixes. Electron Node.js Upgrade: Phase One Summary Run e sync --3 repeatedly, fixing patch conflicts as they arise, until it succeeds. Then export patches and commit changes atomically. Success Criteria Phase One is complete when: e sync --3 exits with code 0 (no patch failures) All changes are committed per the commit guidelines Do not stop until these criteria are met. CRITICAL Do not delete or skip patches unless 100% certain the patch is no longer needed. For major version upgrades, patches that shim deprecated V8 APIs or backport upstream changes are often deletable because the new Node.js version already incorporates them — but verify before removing. Complicated conflicts or hard to resolve issues should be presented to the user after you have exhausted all other options. Do not delete the patch just because you can't solve it. CRITICAL Never use git am --skip and then manually recreate a patch by making a new commit. This destroys the original patch's authorship, commit message, and position in the series. If git am --continue reports \"No changes\", investigate why — the changes were likely absorbed by a prior conflict resolution's 3-way merge. Present this situation to the user rather than skipping and recreating. Context The roller/node/main branch is created by automation to update Electron's Node.js dependency version in DEPS . No work has been done to handle breaking changes between the old and new versions. There are two types of Node.js version updates: Bumps (patch/minor): Automated by electron-roller[bot] with commit title chore: bump node to v{version} . Trivial patch index updates are handled automatically by patchup[bot] . These often land cleanly, but may require manual patch fixes. Major upgrades (e.g., v22 → v24): Manual, large PRs with commit title chore: upgrade Node.js to v{X}.{Y}.{Z} . These typically involve deleting obsolete patches, adapting many others, and updating @types/node in package.json . Key directories: Current directory: Electron repo (always run e commands here) ../third_party/electron_node : Node.js repo (where patches apply) patches/node/ : Patch files for Node.js docs/development/patches.md : Patch system documentation Pre-flight Checks Run these once at the start of each upgrade session: Clear rerere cache (if enabled): git rerere clear in both the electron and ../third_party/electron_node repos. Stale recorded resolutions from a prior attempt can silently apply wrong merges. Ensure pre-commit hooks are installed : Check that .git/hooks/pre-commit exists. If not, run yarn husky to install it. The hook runs lint-staged which handles clang-format for C++ files. Look for the same roll on other branches : fetch roller/node/main and any sibling roller/node/{N}-x-y branch for the same Node.js version. If they already carry fixes, reuse them verbatim (patch names, content, commit titles, Ref: lines) rather than re-deriving them. See \"Reuse Fixes From Sibling Roller Branches\" in references/phase-one-commit-guidelines.md . Workflow Run e sync --3 (the --3 flag enables 3-way merge, always required) If succeeds → skip to step 5 If patch fails: Identify target repo and patch from error output Analyze failure (see references/patch-analysis.md) Fix conflict in ../third_party/electron_node working directory Run git am --continue in ../third_party/electron_node Repeat until all patches for that repo apply IMPORTANT: Once git am --continue succeeds you MUST run e patches node to export fixes Return to step 1 When e sync --3 succeeds, run e patches all Read references/phase-one-commit-guidelines.md NOW , then commit changes following those instructions exactly. Commands Reference Command Purpose e sync --3 Clone deps and apply patches with 3-way merge git am --continue Continue after resolving conflict (run in node repo) e patches node Export commits from node repo to patch files e patches all Export all patches from all targets e patches node --commit-updates Export patches and auto-commit trivial changes e patches --list-targets List targets and config paths Patch System Mental Model patches/node/*.patch → [e sync --3] → ../third_party/electron_node commits ← [e patches] ← When to Edit Patches Situation Action During active git am conflict Fix in node repo, then git am --continue Modifying patch outside conflict Edit .patch file directly Creating new patch (rare, avoid) Commit in node repo, then e patches node Fix existing patches 99% of the time rather than creating new ones. Patch Fixing Rules Preserve authorship : Keep original author in TODO comments (from patch From: field) Never change TODO assignees : TODO(name) must retain original name Update descriptions : If upstream changed APIs or macros, update patch commit message to reflect current state Never skip-and-recreate a patch : If git am --continue says \"No changes — did you forget to use 'git add'?\", do NOT run git am --skip and create a replacement commit. The patch's changes were already absorbed by a prior 3-way merge resolution. This means an earlier conflict resolution pulled in too many changes. Present the situation to the user for guidance — the correct fix may require re-doing an earlier resolution more carefully to keep each patch's changes separate. Electron Node.js Upgrade: Phase Two Summary Run e build -k 999 -- --quiet repeatedly, fixing build issues as they arise, until it succeeds. Then run e start --version to validate Electron launches and commit changes atomically. Run Phase Two immediately after Phase One is complete. Success Criteria Phase Two is complete when: e build -k 999 -- --quiet exits with code 0 (no build failures) e start --version has been run to check Electron launches All changes are committed per the commit guidelines Do not stop until these criteria are met. Do not delete code or features, never comment out code in order to take short cut. Make all existing code, logic and intention work. Context The roller/node/main branch is created by automation to update Electron's Node.js dependency version in DEPS . No work has been done to handle breaking changes between the old and new versions. Node.js APIs (especially internal V8 integration, OpenSSL/BoringSSL compatibility, and build system files) frequently change between versions. In every case the code in Electron must be updated to account for the change in Node.js, strongly avoid making changes to the code in Node.js to fix Electron's build. Key directories: Current directory: Electron repo (always run e commands here) ../third_party/electron_node : Node.js repo (do not touch this code to fix build issues, just read it to obtain context) Workflow Run e build -k 999 -- --quiet (the --quiet flag suppresses per-target status lines, showing only errors and the final result) If succeeds → skip to step 6 If build fails: Identify underlying file in \"electron\" from the compilation error message Analyze failure Fix build issue by adapting Electron's code for the change in Node.js Run e build -t {target_that_failed}.o to build just the failed target we were specifically fixing You can identify the target_that_failed from the failure line in the build log. E.g. FAILED: 2e506007-8d5d-4f38-bdd1-b5cd77999a77 \"./obj/electron/shell/browser/api/electron_api_utility_process.o\" CXX obj/electron/shell/browser/api/electron_api_utility_process.o the target name is obj/electron/shell/browser/api/electron_api_utility_process.o Read references/phase-two-commit-guidelines.md NOW , then commit changes following those instructions exactly. Return to step 1 CRITICAL : After ANY commit (especially patch commits), immediately run git status in the electron repo Look for other modified .patch files that only have index/hunk header changes These are dependent patches affected by your fix Commit them immediately with: git commit -am \"chore: update patches (trivial only)\" Return to step 1 When e build succeeds, run e start --version Check if you have any pending changes in the Node.js repo by running git status in ../third_party/electron_node If you have changes follow the instructions below in \"A. Patch Fixes\" to correctly commit those modifications into the appropriate patch file Commands Reference Command Purpose e build -k 999 -- --quiet Build Electron, continue on errors, suppress status lines e build -t {target}.o Build just one specific target to verify a fix e start --version Validate Electron launches after successful build Two Types of Build Fixes A. Patch Fixes (for files in patched Node.js files) When the error is in a file that Electron patches (check with grep -l \"filename\" patches/node/*.patch ): Edit the file in the Node.js source tree ( ../third_party/electron_node/... ) Create a fixup commit targeting the original patch commit: cd ../third_party/electron_node git add <modified-file> git commit --fixup=<original-patch-commit-hash> GIT_SEQUENCE_EDITOR=: git rebase --autosquash --autostash -i <commit>^ Export the updated patch: e patches node Commit the updated patch file following references/phase-one-commit-guidelines.md . To find the original patch commit to fixup: git log --oneline | grep -i \"keyword from patch name\" The base commit for rebase is the Node.js commit before patches were applied. Find it by checking the refs/patches/upstream-head ref. B. Electron Code Fixes (for files in shell/, electron/, etc.) When the error is in Electron's own source code: Edit files directly in the electron repo Commit directly (no patch export needed) Electron Node.js Upgrade: Phase Three Summary Run the Node.js test suite via script/node-spec-runner.js , fix failing tests, and commit fixes until all tests pass. Certain tests are permanently disabled (listed in script/node-disabled-tests.json ) and should not be run. Run Phase Three immediately after Phase Two is complete. Success Criteria Phase Three is complete when: node script/node-spec-runner.js --default exits with zero failures All changes are committed per the commit guidelines Do not stop until these criteria are met. Context Electron runs a subset of Node.js's upstream test suite using a custom runner ( script/node-spec-runner.js ). Tests are executed with the built Electron binary via ELECTRON_RUN_AS_NODE=true . Many tests need adaptation because Electron uses BoringSSL (not OpenSSL) and Chromium's V8 (which may differ from Node.js's bundled V8). Key files: script/node-spec-runner.js — Test runner script script/node-disabled-tests.json — Permanently disabled tests (do not try to fix these) ../third_party/electron_node/test/ — Node.js test files (where patches apply) patches/node/fix_crypto_tests_to_run_with_bssl.patch — BoringSSL crypto test adaptations patches/node/test_formally_mark_some_tests_as_flaky.patch — Flaky test list Workflow Run node script/node-spec-runner.js --default from the electron repo If all tests pass → Phase Three is complete If tests fail: Identify the failing test file(s) from the output Analyze each failure (see \"Common Failure Patterns\" below) Fix the test in ../third_party/electron_node/test/... Re-run the specific failing test to verify: node script/node-spec-runner.js {test-path} The test path is relative to the node test/ directory, e.g. test/parallel/test-crypto-key-objects-raw.js Do NOT use --default when running specific tests — it adds the full suite flags Do NOT run tests directly with ELECTRON_RUN_AS_NODE — the runner handles environment setup (e.g. temporarily switching package.json from ESM to CommonJS) Commit the fix using the fixup workflow and commit guidelines Return to step 1 Commands Reference Command Purpose node script/node-spec-runner.js --default Run full Node.js test suite node script/node-spec-runner.js test/parallel/test-foo.js Run a single test NODE_REGENERATE_SNAPSHOTS=1 node script/node-spec-runner.js test/test-runner/test-foo.mjs Regenerate snapshot for a snapshot-based test Common Failure Patterns BoringSSL incompatibilities Electron builds Node.js against Chromium's BoringSSL instead of Node.js's bundled OpenSSL. As of the v24.18.0 roll this is wired up through a GN arg rather than large source patches: # build/args/all.gn # Build Node.js against Chromium's BoringSSL instead of node's bundled OpenSSL. node_openssl_path = \"//third_party/boringssl\" Upstream Node.js now supports building against BoringSSL natively (see nodejs/node commits 677ca7e76c9 and 61b20f60a39 ), so most of Electron's historical BoringSSL workarounds have been eliminated . During the v24.18.0 roll: fix_crypto_tests_to_run_with_bssl.patch shrank from ~1100 lines to skipping just two test files. fix_handle_boringssl_and_openssl_incompatibilities.patch dropped ~176 lines. What remains is C++-level shimming in deps/ncrypto/ncrypto.cc , src/crypto/crypto_{common,context,hash}.cc , src/env.h , src/node_metadata.h , and src/node_options.h . Expect to delete these workarounds over time rather than grow them. Only add a guard when a feature is genuinely still missing from BoringSSL; upstream tests increasingly self-skip when process.features.openssl_is_boringssl is set, so no Electron change is needed. Preferred guard for a still-unsupported feature — skip the whole test file at the top, and add it to fix_crypto_tests_to_run_with_bssl.patch : if (process. features . openssl_is_boringssl ) { common. skip ( 'Skipping unsupported ML-DSA key tests' ); } For tests that can't be cleanly guarded inline, add the whole file to script/node-disabled-tests.json instead. Still unsupported in Chromium's BoringSSL (as of v24.18.0): Feature Current handling RSA-PSS keygen (deprecation path) file-level common.skip in test-crypto-keygen-deprecation ML-DSA keys file-level common.skip in test-crypto-pqc-key-objects-ml-dsa ML-KEM keys disabled in node-disabled-tests.json ( test-crypto-pqc-key-objects-ml-kem ) FIPS mode disabled ( test-crypto-fips ) Secure heap disabled ( test-crypto-secure-heap ) Stateless DH disabled ( test-crypto-dh-stateless ) Assorted keygen / WebCrypto keygen disabled ( test-crypto-keygen , test-webcrypto-keygen , wpt/test-webcrypto ) Behavioral differences (assertion updates, not skips) — some errors just changed shape: Creating a private key from an unsupported OKP (Ed448) JWK now throws Invalid JWK OKP key (previously Invalid JWK data ); see nodejs/node#62499. Electron's spec/node-spec.ts assertion was loosened to /Invalid JWK/ . When you do need to guard a test, prefer a precise capability check (e.g. ciphers.includes('aes-128-ccm') ) over a blanket process.features.openssl_is_boringssl check where the feature can be probed directly. Snapshot test mismatches Some tests compare output against committed .snapshot files using assert.strictEqual — these are NOT wildcard comparisons. When Chromium's V8 produces different output (e.g. different stack traces due to V8 enhancements), the snapshot must be regenerated: NODE_REGENERATE_SNAPSHOTS=1 node script/node-spec-runner.js test /test-runner/test-foo.mjs Then inspect the diff to verify the changes are expected, and commit the updated snapshot into the appropriate patch. V8 behavioral differences Chromium's V8 may be ahead of Node.js's bundled V8. This can cause: Different stack trace formats (e.g. thenable async stack frames) Different error messages Features available in Chromium V8 that aren't in stock Node.js V8 (or vice versa) Two Types of Test Fixes A. Patch Fixes (most common for test failures) Most test fixes go into existing patches in patches/node/ . Use the fixup workflow: Edit the test file in ../third_party/electron_node/test/...",
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