diff --git a/crates/git-vendor/CHANGELOG.md b/crates/git-vendor/CHANGELOG.md
index 2e5bf9e..403f258 100644
--- a/crates/git-vendor/CHANGELOG.md
+++ b/crates/git-vendor/CHANGELOG.md
@@ -1,5 +1,77 @@
 # Changelog
 
+## [1.0.0-alpha.1](https://github.com/git-ents/git-vendor/compare/git-vendor-v1.0.0-alpha.1...git-vendor-v1.0.0-alpha.1) (2026-05-26)
+
+
+### Features
+
+* Add `ConflictStages` carrying `[base, ours, theirs]` stage versions ([0993c27](https://github.com/git-ents/git-vendor/commit/0993c27e42e976f10921cd7c8acea678a5e26077))
+* Add `Error::Conflict` ([395b29c](https://github.com/git-ents/git-vendor/commit/395b29c42ceee1d136bb0348bc2468161767a5b6))
+* Add `Error::InvalidName` ([e535fcf](https://github.com/git-ents/git-vendor/commit/e535fcfc62f9cf2a6e64c7ed0e7d2ee1a47e2eba))
+* Add `Error::InvalidUrl` and `Error::Fetch` variants ([b9d4407](https://github.com/git-ents/git-vendor/commit/b9d4407e3bce2b0373dd43958d477bcc6a656ecd))
+* Add `From<gix::repository::merge_base::Error>` to `Error` ([73df0c5](https://github.com/git-ents/git-vendor/commit/73df0c558ae7674d6b78658688523b207e1599e5))
+* Add `From<merge_trees::Error>` and `From<tree_merge_options::Error>` to `Error` ([31d98a9](https://github.com/git-ents/git-vendor/commit/31d98a9254c03cd5f629ec306383055811621db8))
+* Add `mode` config key with `squash` integration strategy ([b6d305e](https://github.com/git-ents/git-vendor/commit/b6d305e300e26dcd818985cf0dd4dee19da92c0f))
+* Add `vendor_overlay` to `VendorRepository` ([4799cb0](https://github.com/git-ents/git-vendor/commit/4799cb0c601a2d8f3d629d9952aabbd9e9c1dc78))
+* Add `VendorMode` enum replacing `VendorEntry::squash` ([b6d305e](https://github.com/git-ents/git-vendor/commit/b6d305e300e26dcd818985cf0dd4dee19da92c0f))
+* Add `VendorName` validated newtype ([e535fcf](https://github.com/git-ents/git-vendor/commit/e535fcfc62f9cf2a6e64c7ed0e7d2ee1a47e2eba))
+* Add `VendorWorktree::checkout_vendor_conflicted` ([395b29c](https://github.com/git-ents/git-vendor/commit/395b29c42ceee1d136bb0348bc2468161767a5b6))
+* Add committer, author, and message params to `commit_vendor` ([cc46448](https://github.com/git-ents/git-vendor/commit/cc464483f24e0e5f5646b16d6881e5ac1f170e5d))
+* Add DepotRepository trait and VendorEntry ([24f21a7](https://github.com/git-ents/git-vendor/commit/24f21a7a3bdb455a6f6a9cc0b9157d38be3bd0a6))
+* Add Error type with thiserror and impl_gix_from! macro ([24f21a7](https://github.com/git-ents/git-vendor/commit/24f21a7a3bdb455a6f6a9cc0b9157d38be3bd0a6))
+* Add exe module with VendorWorktree trait (checkout/track/untrack/sync) ([1da7741](https://github.com/git-ents/git-vendor/commit/1da774161074166a9f06e9d52953691ee33640c8))
+* Add explicit `ours` commit parameter to `VendorRepository::vendor_paths` ([a5c94e6](https://github.com/git-ents/git-vendor/commit/a5c94e6a117100120d6f860fe733537dea8a05db))
+* Add gix index-from-tree and attribute-stack error conversions to `Error` ([098de11](https://github.com/git-ents/git-vendor/commit/098de11cfdc52699c98d8ed679f9743303fb88d0))
+* Add gix tree-editor and traverse error conversions to `Error` ([f7fe174](https://github.com/git-ents/git-vendor/commit/f7fe174c07c846afe03055165df6e4c6e2b6484e))
+* Add PatternMapping, VendorStatus, VendorMerge, VendorConfig types ([1da7741](https://github.com/git-ents/git-vendor/commit/1da774161074166a9f06e9d52953691ee33640c8))
+* Add VendorConfig::open_from_bytes ([33cd3ba](https://github.com/git-ents/git-vendor/commit/33cd3ba7fc61ae461d653a1913e2006a1e4ddab4))
+* Carry merge-stage versions on `VendorMerge` conflicts ([0993c27](https://github.com/git-ents/git-vendor/commit/0993c27e42e976f10921cd7c8acea678a5e26077))
+* Define DepotRepository trait and Error type ([24f21a7](https://github.com/git-ents/git-vendor/commit/24f21a7a3bdb455a6f6a9cc0b9157d38be3bd0a6))
+* Derive `Error::Config` for invalid vendor glob patterns ([f7fe174](https://github.com/git-ents/git-vendor/commit/f7fe174c07c846afe03055165df6e4c6e2b6484e))
+* Enable gix `blocking-network-client` feature ([b9d4407](https://github.com/git-ents/git-vendor/commit/b9d4407e3bce2b0373dd43958d477bcc6a656ecd))
+* Enable gix `worktree-mutation` feature ([5bb39fb](https://github.com/git-ents/git-vendor/commit/5bb39fb45ed2d3303aee3cb4362240ec1d8c2cd2))
+* Enforce vendor name invariant via validated `VendorName` newtype ([e535fcf](https://github.com/git-ents/git-vendor/commit/e535fcfc62f9cf2a6e64c7ed0e7d2ee1a47e2eba))
+* Filter and remap upstream blobs into local path space in `upstream_tree` ([f7fe174](https://github.com/git-ents/git-vendor/commit/f7fe174c07c846afe03055165df6e4c6e2b6484e))
+* Implement `base_tree` as `upstream_tree` at the recorded base ([e1c0593](https://github.com/git-ents/git-vendor/commit/e1c05931bb2b1d6314f4101ef4fcdc7d12e7c161))
+* Implement `checkout_vendor` working-copy projection ([5bb39fb](https://github.com/git-ents/git-vendor/commit/5bb39fb45ed2d3303aee3cb4362240ec1d8c2cd2))
+* Implement `commit_vendor` ([b8da2b3](https://github.com/git-ents/git-vendor/commit/b8da2b3c32fc9fbaa13a2f6096d2a047e8a1f049))
+* Implement `commit_vendor` using `gix::objs::Commit` and `write_object` ([b8da2b3](https://github.com/git-ents/git-vendor/commit/b8da2b3c32fc9fbaa13a2f6096d2a047e8a1f049))
+* Implement `fetch_vendor` for `gix::Repository` ([b9d4407](https://github.com/git-ents/git-vendor/commit/b9d4407e3bce2b0373dd43958d477bcc6a656ecd))
+* Implement `fetch_vendor` with anonymous remote fetch and ref projection ([b9d4407](https://github.com/git-ents/git-vendor/commit/b9d4407e3bce2b0373dd43958d477bcc6a656ecd))
+* Implement `merge_vendor` in `VendorRepository for gix::Repository` ([31d98a9](https://github.com/git-ents/git-vendor/commit/31d98a9254c03cd5f629ec306383055811621db8))
+* Implement `merge_vendor` three-way merge in local path space ([31d98a9](https://github.com/git-ents/git-vendor/commit/31d98a9254c03cd5f629ec306383055811621db8))
+* Implement `ours_tree` attribute-filtered local snapshot ([098de11](https://github.com/git-ents/git-vendor/commit/098de11cfdc52699c98d8ed679f9743303fb88d0))
+* Implement `upstream_tree` pattern filtering and remapping ([f7fe174](https://github.com/git-ents/git-vendor/commit/f7fe174c07c846afe03055165df6e4c6e2b6484e))
+* Implement `vendor_paths`, resolving the local selection from `.gitattributes` ([a7bd9d2](https://github.com/git-ents/git-vendor/commit/a7bd9d279dd26502afa80e6f203f8905b1ff1f28))
+* Implement `vendor_status` ([73df0c5](https://github.com/git-ents/git-vendor/commit/73df0c558ae7674d6b78658688523b207e1599e5))
+* Implement `vendor_tip` via `try_find_reference` ([e1c0593](https://github.com/git-ents/git-vendor/commit/e1c05931bb2b1d6314f4101ef4fcdc7d12e7c161))
+* Implement PatternMapping and VendorConfig ([33cd3ba](https://github.com/git-ents/git-vendor/commit/33cd3ba7fc61ae461d653a1913e2006a1e4ddab4))
+* Implement VendorConfig and PatternMapping with tests ([33cd3ba](https://github.com/git-ents/git-vendor/commit/33cd3ba7fc61ae461d653a1913e2006a1e4ddab4))
+* Preserve non-UTF-8 `ours` paths byte-for-byte in `ours_tree` ([098de11](https://github.com/git-ents/git-vendor/commit/098de11cfdc52699c98d8ed679f9743303fb88d0))
+* Record squashed upstream OID as a `Squashed-upstream` git trailer ([b6d305e](https://github.com/git-ents/git-vendor/commit/b6d305e300e26dcd818985cf0dd4dee19da92c0f))
+* Refuse to commit conflicted vendor merges and stub conflict checkout ([395b29c](https://github.com/git-ents/git-vendor/commit/395b29c42ceee1d136bb0348bc2468161767a5b6))
+* Reject conflicted `VendorMerge` in `commit_vendor` ([395b29c](https://github.com/git-ents/git-vendor/commit/395b29c42ceee1d136bb0348bc2468161767a5b6))
+* Select `vendor=<name>` attributed paths from the ours commit tree in `ours_tree` ([098de11](https://github.com/git-ents/git-vendor/commit/098de11cfdc52699c98d8ed679f9743303fb88d0))
+* Wire `vendor_paths` to `resolve_vendor_paths` ([a7bd9d2](https://github.com/git-ents/git-vendor/commit/a7bd9d279dd26502afa80e6f203f8905b1ff1f28))
+
+
+### Bug Fixes
+
+* Build the merge commit's tree by overlaying `result_tree` onto the parent ([881d96c](https://github.com/git-ents/git-vendor/commit/881d96cca6aab7a7f40d867438e117d17e3dff67))
+* Error when all configured patterns are invalid instead of silently emptying the tree ([6561041](https://github.com/git-ents/git-vendor/commit/656104187478faba9ec4c89ccd20b8b9cb7d6318))
+* Gate `raw_paths` helper on `#[cfg(unix)]` ([48f6f51](https://github.com/git-ents/git-vendor/commit/48f6f515e403c444ae8d805aea15c611dd8c1777))
+* Handle unborn HEAD with no `.git/index` in `checkout_vendor` ([5bb39fb](https://github.com/git-ents/git-vendor/commit/5bb39fb45ed2d3303aee3cb4362240ec1d8c2cd2))
+* Harden `upstream_tree` glob matching and path remapping ([3caa4ac](https://github.com/git-ents/git-vendor/commit/3caa4acf6fc818f74a6ce81a48af9a92e389fa6d))
+* Harden upstream_tree pattern indexing, path safety, and traversal ([6561041](https://github.com/git-ents/git-vendor/commit/656104187478faba9ec4c89ccd20b8b9cb7d6318))
+* Import `ByteSlice` trait in `non_utf8_filename_is_preserved` ([48f6f51](https://github.com/git-ents/git-vendor/commit/48f6f515e403c444ae8d805aea15c611dd8c1777))
+* Pair compiled globs with their PatternMapping to prevent index desync ([6561041](https://github.com/git-ents/git-vendor/commit/656104187478faba9ec4c89ccd20b8b9cb7d6318))
+* Refuse local transports ([23a6e4e](https://github.com/git-ents/git-vendor/commit/23a6e4e3d4201aa1a7157a96bf0e4c345b026697))
+* Reject escaping or empty synthesized local paths via gix::validate::path::component ([6561041](https://github.com/git-ents/git-vendor/commit/656104187478faba9ec4c89ccd20b8b9cb7d6318))
+* Remove stale vendor symlinks during `checkout_vendor` ([5bb39fb](https://github.com/git-ents/git-vendor/commit/5bb39fb45ed2d3303aee3cb4362240ec1d8c2cd2))
+* Report `Error::Config` when a pattern maps to an empty local path ([3caa4ac](https://github.com/git-ents/git-vendor/commit/3caa4acf6fc818f74a6ce81a48af9a92e389fa6d))
+* Splice vendored content into the full tree on `commit_vendor` ([881d96c](https://github.com/git-ents/git-vendor/commit/881d96cca6aab7a7f40d867438e117d17e3dff67))
+* Use gitignore-like glob semantics in `upstream_tree` so `*` no longer crosses `/` ([3caa4ac](https://github.com/git-ents/git-vendor/commit/3caa4acf6fc818f74a6ce81a48af9a92e389fa6d))
+
 ## [1.0.0-alpha.1](https://github.com/git-ents/git-vendor/compare/git-vendor-v0.2.0...git-vendor-v1.0.0-alpha.1) (2026-03-26)