The latest release of Lore, Epic Games' next-generation open source version control system.

Quickstart | Design | Documentation | Discord

Quick Install

Windows

irm https://raw.githubusercontent.com/EpicGames/lore/main/scripts/install.ps1 | iex

macOS / Linux

curl -fsSL https://raw.githubusercontent.com/EpicGames/lore/main/scripts/install.sh | bash

Release Notes

Changes since v0.8.5.

Breaking changes

• lore-client: logging CLI arguments are now strictly mutually exclusive; a command line passing conflicting logging flags is rejected instead of silently accepted
• Auth login/info now return NotSupported (code 18) when the server has no auth endpoint configured, and surface NotAuthenticated / Disconnected instead of a generic internal error (code -1); scripts branching on these exit/FFI codes must be updated
• Presigned URL vending (POST /v1/repository/{id}/content/{address}/presign) is now restricted to service accounts; normal user tokens can no longer mint presigned URLs

Features

• lore-server: forward BranchList and RepositoryCreate to a remote Lore server when configured (extending the existing BranchCreate/BranchDelete/BranchGet forwarding)
• lore: add a batch node-add verb (lore_revision_tree_add) to the low-level revision API, landing a whole subtree atomically
• lore: run the service process (lore service run) on Linux and macOS, not just Windows
• lore: validate that all strings passed to the C API are valid UTF-8, rejecting invalid input up front with a named field
• lore-server: support file:// JWKS endpoints in the JWK service
• lore-revision: optional durable_delay on the composite store so read replicas can answer before the durable tier is queried
• lore-storage: self-heal corrupt (torn-write / zero-filled) mutable store buckets instead of failing to open the store
• lore-server: add Cache-Control headers to the presigned-URL redeem endpoint for immutable content
• Add a self-contained Terraform example for an AWS primary + edge deployment under contrib/aws/

Fixes & Improvements

• lore-storage: read_into now respects the requested byte range for single-fragment reads (partial reads of files ≤ 256 KiB no longer fail)
• lore-server: fix JWK refresh cache check so a missing/rotated key triggers a fetch, allowing key rotation without a restart
• lore-credential: require a DNS label boundary when matching a dotless JWT aud, and allow exact apex-domain matches, closing an audience-suffix leak
• lore-revision: preserve dirty move status through status --scan instead of degrading it to delete + add
• lore-revision: bound commit read memory with a travelling fragment permit, and cap directory recursion fan-out during commit
• lore-revision: drain staging tasks on all error paths so failures propagate cleanly
• lore-storage: batch FastCDC chunking to cut per-chunk overhead on medium/large writes
• Add transport connect timeouts so local reads no longer stall on an unreachable remote
• lore: use the calling process's working directory for absolute-path resolution in the service process
• Fix lore_branch_switch and lore_branch_reset to restore the branch name→id mapping (so the branch appears in the local list), with a --force override
• lore-revision: fix restore failing with Dirty node remain after nodes were committed
• lore-base: update vendored rpmalloc to 2.0.1

Release Assets

Installer

• lore-setup - Lore CLI Windows installer

Binaries

• lore - Lore CLI
• loreserver - Lore Server
• liblore - Lore Shared Library

Headers

• lore.h - Single header for liblore (packged with liblore)

Supported Platforms

• Windows x84_64
• macOS AArch64
• Linux x86_64
• Linux AArch64 (for Graviton/Neoverse 512-tvb only)

Lore Desktop Client

• Windows: Lore-Desktop-Setup-x64.exe
• macOS: Lore-Desktop-arm64.dmg
• Linux (Ubuntu 24.04): lore-desktop_amd64.deb
• Linux (AppImage): Lore-Desktop-x86_64.AppImage

⬇️ Open Source Lore Assets Below ⬇️

The latest release of Lore, Epic Games' next-generation open source version control system.

Quickstart | Design | Documentation | Discord

Quick Install

Windows

irm https://raw.githubusercontent.com/EpicGames/lore/main/scripts/install.ps1 | iex

macOS / Linux

curl -fsSL https://raw.githubusercontent.com/EpicGames/lore/main/scripts/install.sh | bash

Release Notes

Changes since v0.8.4.

Features

• Implement the low-level revision-tree read verbs on the C API: tree_load/tree_close, resolve_path, list_children, revision & node info, and node_path
• Forward BranchCreate, BranchDelete, and BranchGet to a remote Lore server, opt-in per-RPC under [server.grpc_public_services.forwarded_requests]
• Add repository info --local to read repository metadata from the local store without contacting the remote

Fixes & Improvements

• Fix a corrupt-tree race in concurrent node_add where a half-initialized node could be observed on the child chain
• Protect non-durable local-only fragments from being orphaned by store GC eviction/compaction
• Fix dirty-add reclassifying remaining files when committing multiple added files individually
• Parallelize staging of multiple explicit paths instead of a serialized per-path loop
• Make CLI paths relative to the current working directory across all path-printing commands
• Bump anyhow, crossbeam, and memmap2 for security advisories

Release Assets

Installer

• lore-setup - Lore CLI Windows installer

Binaries

• lore - Lore CLI
• loreserver - Lore Server
• liblore - Lore Shared Library

Headers

• lore.h - Single header for liblore (packged with liblore)

Supported Platforms

• Windows x84_64
• macOS AArch64
• Linux x86_64
• Linux AArch64 (for Graviton/Neoverse 512-tvb only)

Lore Desktop Client

• Windows: Lore-Desktop-Setup-x64.exe
• macOS: Lore-Desktop-arm64.dmg
• Linux (Ubuntu 24.04): lore-desktop_amd64.deb
• Linux (AppImage): Lore-Desktop-x86_64.AppImage

⬇️ Open Source Lore Assets Below ⬇️

The latest release of Lore, Epic Games' next-generation open source version control system.

Quickstart | Design | Documentation | Discord

Quick Install

Windows

irm https://raw.githubusercontent.com/EpicGames/lore/main/scripts/install.ps1 | iex

macOS / Linux

curl -fsSL https://raw.githubusercontent.com/EpicGames/lore/main/scripts/install.sh | bash

Release Notes

Changes since v0.8.3.

Features

• Add --dry-run to revision commit and lock acquire/release
• Run incremental store GC by default; replace --gc with --no-gc to disable
• Expose the mutable store through the low-level storage C API
• Add ForwardedRevisionService gRPC endpoint to forward BranchCreate to a remote server
• Carry structured error detail and FFI codes on the Complete event
• Show staged renames as moves in diff output
• lore status prints paths relative to the current working directory

Fixes & Improvements

• Fix use-after-free in write_fragmented when the chunker future is cancelled
• Fix LoreArray<T> dealloc layout mismatch in Drop
• Fix commit --stats panic and report real fragment stats
• Fix link contents surfacing as parent adds in file diff
• Fix clone not materializing view-filtered directories with all-excluded children
• Reject malformed metadata set args instead of panicking; default branch metadata to current branch
• Reset staged add/remove/update for link nodes
• Propagate dirty to committed ancestor directories on dirty add
• Make dirty add idempotent so a repeat dirty doesn't duplicate the node
• Stage empty dirty-added directories by their own path
• Honor --dry-run on branch push
• Rename [server.replication] config to [server.grpc_internal] (not backwards-compatible)
• Map GRPC storage errors correctly and stop classifying Unknown/EOF errors as server errors
• Handle thin-client RevisionDiff/RevisionTree RPCs with a zeroed revision
• Tag linked-repo RevisionDiff changes with an indexed partition table
• Standardise HTTP tracing and log levels
• Seed QUIC clients with an initial CWND on regeneration
• Remove redundant dry_run field from lock events
• Rename shared store config file to shared_store.toml with auto-migration
• Change stats flag to u8 for C ABI consistency

Release Assets

Installer

• lore-setup - Lore CLI Windows installer

Binaries

• lore - Lore CLI
• loreserver - Lore Server
• liblore - Lore Shared Library

Headers

• lore.h - Single header for liblore (packged with liblore)

Supported Platforms

• Windows x84_64
• macOS AArch64
• Linux x86_64
• Linux AArch64 (for Graviton/Neoverse 512-tvb only)

Lore Desktop Client

• Windows: Lore-Desktop-Setup-x64.exe
• macOS: Lore-Desktop-arm64.dmg
• Linux (Ubuntu 24.04): lore-desktop_amd64.deb
• Linux (AppImage): Lore-Desktop-x86_64.AppImage

⬇️ Open Source Lore Assets Below ⬇️

Initial release of Lore - the next-generation open source version control system maintained by Epic Games.

Quickstart | Design | Documentation | Discord

Quick Install

Windows

irm https://raw.githubusercontent.com/EpicGames/lore/main/scripts/install.ps1 | iex

macOS / Linux

curl -fsSL https://raw.githubusercontent.com/EpicGames/lore/main/scripts/install.sh | bash

Release Assets

Installer

• lore-setup - Lore CLI Windows installer

Binaries

• lore - Lore CLI
• loreserver - Lore Server
• liblore - Lore Shared Library

Headers

• lore.h - Single header for liblore (packged with liblore)

Supported Platforms

• Windows x84_64
• macOS AArch64
• Linux x86_64
• Linux AArch64 (for Graviton/Neoverse 512-tvb only)

Lore Desktop Client

• Windows: Lore-Desktop-Setup-x64.exe
• macOS: Lore-Desktop-arm64.dmg
• Linux (Ubuntu 24.04): lore-desktop_amd64.deb
• Linux (AppImage): Lore-Desktop-x86_64.AppImage

⬇️ Open Source Lore Assets Below ⬇️