Skip to content

Navigation Menu

Appearance settings

- AI CODE CREATION
  GitHub CopilotWrite better code with AI
  GitHub Copilot appDirect agents from issue to merge
  MCP Registry^NewIntegrate external tools
- DEVELOPER WORKFLOWS
  ActionsAutomate any workflow
  CodespacesInstant dev environments
  IssuesPlan and track work
  Code ReviewManage code changes
- APPLICATION SECURITY
  GitHub Advanced SecurityFind and fix vulnerabilities
  Code securitySecure your code as you build
  Secret protectionStop leaks before they start
- EXPLORE
  Why GitHub
  Documentation
  Blog
  Changelog
  Marketplace
View all features
- BY COMPANY SIZE
  Enterprises
  Small and medium teams
  Startups
  Nonprofits
- BY USE CASE
  App Modernization
  DevSecOps
  DevOps
  CI/CD
  View all use cases
- BY INDUSTRY
  Healthcare
  Financial services
  Manufacturing
  Government
  View all industries
View all solutions
- EXPLORE BY TOPIC
  AI
  Software Development
  DevOps
  Security
  View all topics
- EXPLORE BY TYPE
  Customer stories
  Events & webinars
  Ebooks & reports
  Business insights
  GitHub Skills
- SUPPORT & SERVICES
  Documentation
  Customer support
  Community forum
  Trust center
  Partners
View all resources
- COMMUNITY
  GitHub SponsorsFund open source developers
- PROGRAMS
  Security Lab
  Maintainer Community
  Accelerator
  GitHub Stars
  Archive Program
- REPOSITORIES
  Topics
  Trending
  Collections
- ENTERPRISE SOLUTIONS
  Enterprise platformAI-powered developer platform
- AVAILABLE ADD-ONS
  GitHub Advanced SecurityEnterprise-grade security features
  Copilot for BusinessEnterprise-grade AI features
  Premium SupportEnterprise-grade 24/7 support
Pricing

Search code, repositories, users, issues, pull requests...

Search

Clear

Search syntax tips

Provide feedback

We read every piece of feedback, and take your input very seriously.

Include my email address so I can be contacted

Saved searches

Use saved searches to filter your results more quickly

Name

Query

To see all available qualifiers, see our documentation.

Appearance settings

You signed in with another tab or window. Reload to refresh your session. You signed out in another tab or window. Reload to refresh your session. You switched accounts on another tab or window. Reload to refresh your session.

Dismiss alert

MetaMask / ocap-kernel Public

Notifications You must be signed in to change notification settings
Fork 5
Star 7

Code
Issues 23
Pull requests 5
Discussions
Actions
Projects
Wiki
Security and quality
Insights

Additional navigation options

Code
Issues
Pull requests
Discussions
Actions
Projects
Wiki
Security and quality
Insights

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

Merged

grypez merged 68 commits into

mainMetaMask/ocap-kernel:mainfrom

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

Jun 9, 2026

Conversation Commits68 (68)Checks Files changed

Merged

feat(kernel-utils): add sheaf programming module#870
grypez merged 68 commits into
mainfrom
grypez/bringing-in-the-sheaves

Commits

Commits on Jun 8, 2026

feat(kernel-utils): add sheaf programming module

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

grypez
and
claude
committed
refactor(kernel-utils): require guard in getSection, add getGlobalSection

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

grypez
and
claude
committed
fix(kernel-utils): fix false negative in collectSheafGuard for rest-arg sections

grypez
and
claude
committed
feat(kernel-utils): metadata as polynomials of invocation data

grypez
and
claude
committed
fix(kernel-utils): fix build errors in sheafify metadata eval

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

grypez
and
claude
committed
test(kernel-utils): add unit tests for lift composition helpers

grypez
and
claude
committed
fix(kernel-utils): driveLift throws with accumulated errors as cause

grypez
and
claude
committed
docs(kernel-utils): document sheaf module in README

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

grypez
and
claude
committed
feat(kernel-utils): add getDiscoverableSection, deprecate global section methods

grypez
and
claude
committed
fix(kernel-utils): allow passable default guards for async section interfaces

grypez
and
claude
committed
fix(kernel-utils): bind method calls in makeRemoteSection via E proxy

grypez
and
claude
committed
fix(kernel-utils): suppress noUncheckedIndexedAccess false positive in makeRemoteSection

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

grypez
and
claude
committed
docs(kernel-utils): fix sheaf doc errors from revocation removal

grypez
and
claude
committed
refactor(kernel-utils): extract buildMethodGuard to eliminate duplication

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

grypez
and
claude
committed
feat(kernel-utils): export noopLift as canonical single-section placeholder lift

grypez
and
claude
committed
feat(kernel-utils): add makeSection to eliminate as-unknown-as-Section cast

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

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

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

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

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

grypez
and
claude
committed
refactor(kernel-utils): rename MetaDataSpec → MetadataSpec

grypez
and
claude
committed
refactor(kernel-utils): remove Presheaf<M> thin alias

grypez
and
claude
committed
docs(kernel-utils): document why Sheaf.getSection returns object

grypez
and
claude
committed
refactor(kernel-utils): remove dead resolvedGuard alias in sheafify

grypez
and
claude
committed
test(kernel-utils): add getSection explicit-guard test coverage

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

grypez
and
claude
committed
refactor(kernel-utils): unexport collectSheafGuard from public index

grypez
and
claude
committed
docs(kernel-utils): documentation pass for sheaf module

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

grypez
and
claude
committed
fix(kernel-utils): pass error snapshots to lift generator in driveLift

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

grypez
and
claude
committed
refactor(kernel-utils): move sheaf exports to ./sheaf subpath

grypez
and
claude
committed
test(kernel-utils): add failing test for NaN constraint detection in decomposeMetadata

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

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

grypez
and
claude
committed
fix(kernel-utils): handle -0 in encodeMetadataEntry

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

grypez
and
claude
committed
fix(sheaves): use Object.hasOwn in decomposeMetadata to avoid prototype chain

grypez
and
claude
committed
refactor(sheaves): revert section → handler rename
grypez
committed
docs(sheaves): add INTRODUCTION.md and fix doc links
grypez
committed
docs(sheaves): rename documents/ to docs/ for convention
grypez
committed
refactor(sheaves): remove unused 'source' metadata kind
grypez
committed
chore(sheaves): rebase yarn.lock onto main to drop spurious downresolutions

grypez
and
claude
committed
docs(sheaves): Correct 'overlapping' example
grypez
committed
refactor(sheaves): drop 'stalk' terminology in favor of 'candidate'
grypez
committed
refactor(sheaves): drop deprecated global section constructors

grypez
and
claude
committed
refactor(sheaves): rename 'lift' option key to 'policy'
grypez
committed
docs(sheaves): align README design choices with implementation
grypez
committed
test(sheaves): rename sheafify.e2e to scenarios.test.ts

grypez
and
claude
committed
test(sheaves): raise coverage to 99% (stmts) / 98% (branches)

grypez
and
claude
committed
chore(sheaves): reset to unreleased state (0.0.0, empty changelog)
grypez
committed
ci: re-trigger Main
grypez
committed

Footer

© 2026 GitHub, Inc.

Footer navigation

Terms
Privacy
Security
Status
Community
Docs
Contact

You can’t perform that action at this time.