RFC: ESM migration with lazy-loaded aspects#10376

Draft

zkochan wants to merge 51 commits into

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zkochan:rfc/esm-lazy-aspects

Commits on May 15, 2026

feat(rfc): implement Slice 4 - Aspect.create runtimes thunk and pilot rollout
zkochan
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feat(rfc): implement Slice 5 - minimal Harmony.resolve and --lazy flag
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feat(rfc): implement Slice 6 - slot-producer index and Harmony integration
zkochan
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feat(rfc): implement Slice 7 - bulk migration script
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feat(rfc): implement Slice 7 - bulk migration (Cohort A - leaves)
zkochan
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feat(rfc): implement Slice 7 - bulk migration (Cohort B - workspace core)
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feat(rfc): implement Slice 7 - bulk migration (All Cohorts)
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feat(rfc): implement Slice 8 - user extension lazy loading
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chore: remove hacky babel lazy-dependency plugin
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fix(rfc): repair slice 7 broken import blocks
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feat(rfc): implement Slice 10 - Rollup publish bundle
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fix(rfc): add missing imports to slice 7 commands files
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feat(rfc): externalize browser-only @teambit packages in publish bundle
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refactor(rfc): promote scopes/harmony/harmony to teambit.harmony/core
zkochan
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test(e2e): disable Node TS type-stripping for the mocha test scripts
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feat(rfc): add legacy-Harmony compatibility shims to @teambit/core
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fix(rfc): Aspect.create synthesises declareRuntime from runtimes thunk
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test(e2e): drop import.meta.url from CJS-loaded test files
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chore(bootstrap): add scripts/bvm-patches/ for the lazy-aspects migration
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feat(rfc): finish Slice 5 - `bit --help` reads from COMMAND_INDEX
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perf(rfc): remove babel-level lazy require thunks
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Revert "perf(rfc): remove babel-level lazy require thunks"
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Reapply "perf(rfc): remove babel-level lazy require thunks"
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refactor(rfc): split UI value re-exports out of aspect index barrels (WIP)
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chore(bootstrap): fix-bare-esm-imports.mjs handles package subpaths + asset stubs
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fix(rfc): cli.register(descriptor, factory) accumulates per-aspect
zkochan
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feat(rfc): Slice 7 - lazy aspect resolution by default
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perf(rfc): short-circuit `bit --version` and unknown commands
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perf(rfc): direct .aspect.js imports bypass barrel index.ts files
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refactor(rfc): split UI/graphql/bundler bindings out of workspace.main.runtime
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refactor(rfc): split graphql/UI bindings out of envs, scope, aspect-loader
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refactor(rfc): split graphql/UI bindings out of generator, install, component
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feat(rfc): lazy aspect-ids — heavy hosts no-op for CLI commands
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chore(rfc): prep Rollup bundle for future re-enable; bundle still blocked
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chore(rfc): externalize-ui plugin — bundle now builds, runtime still broken
zkochan
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Commits on May 16, 2026