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MetaMask / ocap-kernel Public

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feat(kernel-utils): add sheaf programming module#870

Open

grypez wants to merge 54 commits into

mainMetaMask/ocap-kernel:mainfrom

grypez/bringing-in-the-sheavesMetaMask/ocap-kernel:grypez/bringing-in-the-sheavesCopy head branch name to clipboard

Conversation Commits54 (54)Checks Files changed

Open

feat(kernel-utils): add sheaf programming module#870
grypez wants to merge 54 commits into
mainfrom
grypez/bringing-in-the-sheaves

Commits

Commits on May 8, 2026

feat(kernel-utils): add sheaf programming module

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test(kernel-utils): update index exports snapshot for sheaf and GET_DESCRIPTION

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refactor(kernel-utils): require guard in getSection, add getGlobalSection

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test(kernel-utils): use vi.fn() spies in sheafify e2e tests to verify dispatch

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fix(kernel-utils): fix false negative in collectSheafGuard for rest-arg sections

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feat(kernel-utils): metadata as polynomials of invocation data

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fix(kernel-utils): fix build errors in sheafify metadata eval

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feat(kernel-utils): treat {} as empty sheaf metadata
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refactor(kernel-utils): redesign Lift as AsyncGenerator coroutine

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test(kernel-utils): add unit tests for lift composition helpers

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fix(kernel-utils): driveLift throws with accumulated errors as cause

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docs(kernel-utils): document sheaf module in README

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feat(kernel-utils): add makeRemoteSection for CapTP remote refs as sheaf sections

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feat(kernel-utils): add getDiscoverableSection, deprecate global section methods

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fix(kernel-utils): allow passable default guards for async section interfaces

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fix(kernel-utils): bind method calls in makeRemoteSection via E proxy

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fix(kernel-utils): suppress noUncheckedIndexedAccess false positive in makeRemoteSection

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docs: Update changelogs
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docs(kernel-utils): Improve sheaf documentation
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refactor(kernel-utils): remove unused sheaf revocation API

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docs(kernel-utils): fix sheaf doc errors from revocation removal

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refactor(kernel-utils): extract buildMethodGuard to eliminate duplication

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fix(kernel-utils): harden sheafify return value and frozenSections

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feat(kernel-utils): export noopLift as canonical single-section placeholder lift

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feat(kernel-utils): add makeSection to eliminate as-unknown-as-Section cast

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refactor(kernel-utils): centralize guard payload helpers and move asyncifyMethodGuards to guard.ts

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fix(kernel-utils): improve error message for lift object-identity protocol violation

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docs(kernel-utils): note that source metadata is for trust-boundary use only

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refactor(kernel-utils): remove getStalk and guardCoversPoint from public exports

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refactor(kernel-utils): inline driveLift into sheafify and remove drive.ts

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refactor(kernel-utils): rename MetaDataSpec → MetadataSpec

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refactor(kernel-utils): remove Presheaf<M> thin alias

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docs(kernel-utils): document why Sheaf.getSection returns object

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refactor(kernel-utils): remove dead resolvedGuard alias in sheafify

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test(kernel-utils): add getSection explicit-guard test coverage

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test(kernel-utils): add e2e test for multi-candidate lift retry on handler failure

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refactor(kernel-utils): unexport collectSheafGuard from public index

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docs(kernel-utils): documentation pass for sheaf module

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test(kernel-utils): add failing tests for driveLift snapshot and metadataKey conflation bugs

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fix(kernel-utils): pass error snapshots to lift generator in driveLift

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fix(kernel-utils): use type-tagged encoding in metadataKey to prevent conflation

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refactor(kernel-utils): move sheaf exports to ./sheaf subpath

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test(kernel-utils): add failing test for NaN constraint detection in decomposeMetadata

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fix(kernel-utils): use Object.is for value equality in decomposeMetadata

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test(kernel-utils): add failing test for -0 vs +0 collapse in metadataKey

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fix(kernel-utils): handle -0 in encodeMetadataEntry

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feat(sheaves): add sheaves package
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refactor(sheaves): apply updated terminology
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chore(kernel-utils): remove @endo/eventual-send dep and stale sheaf export
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docs(sheaves): rename LIFT.md to POLICY.md
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docs: update changelogs for sheaves and kernel-utils
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docs(sheaves): update USAGE.md and POLICY.md terminology
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test(sheaves): add failing tests for prototype-chain bugs in decomposeMetadata

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fix(sheaves): use Object.hasOwn in decomposeMetadata to avoid prototype chain

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