Add .npmrc ignore-scripts=true (Miasma install-hook mitigation)#1471
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Prevents npm from auto-running dependency lifecycle scripts (preinstall/install/postinstall) on install, mitigating the Miasma/Shai-Hulud npm supply-chain worm class. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
waltjones
approved these changes
Jun 11, 2026
This was referenced Jun 11, 2026
`.npmrc` ignore-scripts=true blocks malicious dependency install hooks (the Miasma mitigation) but also suppresses npm's own pre/post run-script hooks, so `npm run build` ran webpack while the `postbuild` hook (validate:es5 + update:snippets + pack) silently never fired. Result: no examples/rollbar.tgz, and the "Validate examples" CI step failed on every leg. Replace the `postbuild` / `postbuild:dev` auto-hooks with an explicit `build:finalize` step invoked from `build` and `build:dev`. Explicit `npm run` invocations still execute under ignore-scripts (only the implicit pre/post hooks are blocked), so the tgz is produced again — without re-enabling install hooks. No double-run in normal environments since the hook names are gone. Verified locally with ignore-scripts active: `npm run build` produces examples/rollbar.tgz and `npm run validate:examples` passes all 15 examples. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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Description of the change
Adds a repo-local
.npmrccontainingignore-scripts=trueso npm does not auto-execute dependency lifecycle scripts (preinstall/install/postinstall) onnpm install. This blocks the execution mechanism used by the Miasma / Shai-Hulud npm supply-chain worm.Config-only change. Explicit
npm run <script>invocations are unaffected; only automatic install-time lifecycle scripts are suppressed. Part of a fleet-wide rollout tracked in Linear PLA-1580 (one PR per repo).Type of change
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