*: Remove

29 files changed, 0 insertions, 1142 deletions

diff --git a/internal/testgit/algorithms.go b/internal/testgit/algorithms.go
deleted file mode 100644
index aea4dc12..00000000
--- a/internal/testgit/algorithms.go
+++ /dev/null
@@ -1,18 +0,0 @@
-package testgit
-
-import (
-	"testing"
-
-	objectid "codeberg.org/lindenii/furgit/object/id"
-)
-
-// ForEachAlgorithm runs a subtest for every supported algorithm.
-func ForEachAlgorithm(t *testing.T, fn func(t *testing.T, algo objectid.Algorithm)) {
-	t.Helper()
-
-	for _, algo := range objectid.SupportedAlgorithms() {
-		t.Run(algo.String(), func(t *testing.T) {
-			fn(t, algo)
-		})
-	}
-}
diff --git a/internal/testgit/repo.go b/internal/testgit/repo.go
deleted file mode 100644
index 72831bd6..00000000
--- a/internal/testgit/repo.go
+++ /dev/null
@@ -1,11 +0,0 @@
-// Package testgit provides helpers for integration tests with upstream git(1).
-package testgit
-
-import objectid "codeberg.org/lindenii/furgit/object/id"
-
-// TestRepo is a temporary git repository harness for integration tests.
-type TestRepo struct {
-	dir  string
-	algo objectid.Algorithm
-	env  []string
-}
diff --git a/internal/testgit/repo_cat_file.go b/internal/testgit/repo_cat_file.go
deleted file mode 100644
index 7dbd2c43..00000000
--- a/internal/testgit/repo_cat_file.go
+++ /dev/null
@@ -1,14 +0,0 @@
-package testgit
-
-import (
-	"testing"
-
-	objectid "codeberg.org/lindenii/furgit/object/id"
-)
-
-// CatFile returns raw output from git cat-file.
-func (testRepo *TestRepo) CatFile(tb testing.TB, mode string, id objectid.ObjectID) []byte {
-	tb.Helper()
-
-	return testRepo.RunBytes(tb, "cat-file", mode, id.String())
-}
diff --git a/internal/testgit/repo_commit_graph_write.go b/internal/testgit/repo_commit_graph_write.go
deleted file mode 100644
index 13221f87..00000000
--- a/internal/testgit/repo_commit_graph_write.go
+++ /dev/null
@@ -1,13 +0,0 @@
-package testgit
-
-import "testing"
-
-// CommitGraphWrite runs "git commit-graph write" with args in the repository.
-func (testRepo *TestRepo) CommitGraphWrite(tb testing.TB, args ...string) {
-	tb.Helper()
-
-	cmdArgs := make([]string, 0, len(args)+3)
-	cmdArgs = append(cmdArgs, "commit-graph", "write")
-	cmdArgs = append(cmdArgs, args...)
-	_ = testRepo.Run(tb, cmdArgs...)
-}
diff --git a/internal/testgit/repo_commit_tree.go b/internal/testgit/repo_commit_tree.go
deleted file mode 100644
index 3a5a75ac..00000000
--- a/internal/testgit/repo_commit_tree.go
+++ /dev/null
@@ -1,29 +0,0 @@
-package testgit
-
-import (
-	"testing"
-
-	objectid "codeberg.org/lindenii/furgit/object/id"
-)
-
-// CommitTree creates a commit from a tree and message, optionally with parents.
-func (testRepo *TestRepo) CommitTree(tb testing.TB, tree objectid.ObjectID, message string, parents ...objectid.ObjectID) objectid.ObjectID {
-	tb.Helper()
-
-	args := make([]string, 0, 2+2*len(parents)+2)
-
-	args = append(args, "commit-tree", tree.String())
-	for _, p := range parents {
-		args = append(args, "-p", p.String())
-	}
-
-	args = append(args, "-m", message)
-	hex := testRepo.Run(tb, args...)
-
-	id, err := objectid.ParseHex(testRepo.algo, hex)
-	if err != nil {
-		tb.Fatalf("parse commit-tree output %q: %v", hex, err)
-	}
-
-	return id
-}
diff --git a/internal/testgit/repo_commit_tree_env.go b/internal/testgit/repo_commit_tree_env.go
deleted file mode 100644
index fbddf26f..00000000
--- a/internal/testgit/repo_commit_tree_env.go
+++ /dev/null
@@ -1,51 +0,0 @@
-package testgit
-
-import (
-	"slices"
-	"strings"
-	"testing"
-
-	objectid "codeberg.org/lindenii/furgit/object/id"
-)
-
-// CommitTreeWithEnv creates one commit from a tree and message, optionally with
-// parents, using additional environment variables for the git subprocess.
-func (testRepo *TestRepo) CommitTreeWithEnv(
-	tb testing.TB,
-	extraEnv []string,
-	tree objectid.ObjectID,
-	message string,
-	parents ...objectid.ObjectID,
-) objectid.ObjectID {
-	tb.Helper()
-
-	args := make([]string, 0, 2+2*len(parents)+2)
-
-	args = append(args, "commit-tree", tree.String())
-	for _, parent := range parents {
-		args = append(args, "-p", parent.String())
-	}
-
-	args = append(args, "-m", message)
-	hex := testRepo.runWithExtraEnv(tb, extraEnv, args...)
-
-	id, err := objectid.ParseHex(testRepo.algo, hex)
-	if err != nil {
-		tb.Fatalf("parse commit-tree output %q: %v", hex, err)
-	}
-
-	return id
-}
-
-func (testRepo *TestRepo) runWithExtraEnv(tb testing.TB, extraEnv []string, args ...string) string {
-	tb.Helper()
-
-	env := slices.Concat(testRepo.env, extraEnv)
-
-	out, err := testRepo.runBytesWithEnv(tb, nil, testRepo.dir, env, args...)
-	if err != nil {
-		tb.Fatalf("git %v failed: %v\n%s", args, err, out)
-	}
-
-	return strings.TrimSpace(string(out))
-}
diff --git a/internal/testgit/repo_from_fixture.go b/internal/testgit/repo_from_fixture.go
deleted file mode 100644
index 632de12a..00000000
--- a/internal/testgit/repo_from_fixture.go
+++ /dev/null
@@ -1,36 +0,0 @@
-package testgit
-
-import (
-	"io/fs"
-	"os"
-	"testing"
-
-	objectid "codeberg.org/lindenii/furgit/object/id"
-)
-
-// NewRepoFromFixture copies one existing repository fixture into a temp dir.
-func NewRepoFromFixture(tb testing.TB, algo objectid.Algorithm, fixtureDir string) *TestRepo {
-	tb.Helper()
-
-	if algo.Size() == 0 {
-		tb.Fatalf("invalid algorithm: %v", algo)
-	}
-
-	dst := tb.TempDir()
-	srcFS := os.DirFS(fixtureDir)
-
-	err := copyFS(dst, srcFS)
-	if err != nil {
-		tb.Fatalf("copy fixture %q: %v", fixtureDir, err)
-	}
-
-	return &TestRepo{
-		dir:  dst,
-		algo: algo,
-		env:  defaultEnv(),
-	}
-}
-
-func copyFS(dst string, src fs.FS) error {
-	return os.CopyFS(dst, src)
-}
diff --git a/internal/testgit/repo_fs.go b/internal/testgit/repo_fs.go
deleted file mode 100644
index 56acbfcf..00000000
--- a/internal/testgit/repo_fs.go
+++ /dev/null
@@ -1,86 +0,0 @@
-package testgit
-
-import (
-	"os"
-	"path/filepath"
-	"testing"
-)
-
-// OpenFile opens one file relative to the repository root.
-func (testRepo *TestRepo) OpenFile(tb testing.TB, name string) *os.File {
-	tb.Helper()
-
-	root := testRepo.OpenRoot(tb)
-
-	file, err := root.Open(name)
-	if err != nil {
-		tb.Fatalf("Open(%q): %v", name, err)
-	}
-
-	return file
-}
-
-// ReadFile reads one file relative to the repository root.
-func (testRepo *TestRepo) ReadFile(tb testing.TB, name string) []byte {
-	tb.Helper()
-
-	root := testRepo.OpenRoot(tb)
-
-	data, err := root.ReadFile(name)
-	if err != nil {
-		tb.Fatalf("ReadFile(%q): %v", name, err)
-	}
-
-	return data
-}
-
-// WriteFile writes one file relative to the repository root.
-func (testRepo *TestRepo) WriteFile(tb testing.TB, name string, data []byte, perm os.FileMode) {
-	tb.Helper()
-
-	root := testRepo.OpenRoot(tb)
-
-	err := root.WriteFile(name, data, perm)
-	if err != nil {
-		tb.Fatalf("WriteFile(%q): %v", name, err)
-	}
-}
-
-// WriteFileAll writes one file relative to the repository root, creating any
-// missing parent directories first.
-func (testRepo *TestRepo) WriteFileAll(
-	tb testing.TB,
-	name string,
-	data []byte,
-	dirPerm os.FileMode,
-	filePerm os.FileMode,
-) {
-	tb.Helper()
-
-	root := testRepo.OpenRoot(tb)
-
-	dir := filepath.Dir(name)
-	if dir != "." {
-		err := root.MkdirAll(dir, dirPerm)
-		if err != nil {
-			tb.Fatalf("MkdirAll(%q): %v", dir, err)
-		}
-	}
-
-	err := root.WriteFile(name, data, filePerm)
-	if err != nil {
-		tb.Fatalf("WriteFile(%q): %v", name, err)
-	}
-}
-
-// Remove removes one path relative to the repository root.
-func (testRepo *TestRepo) Remove(tb testing.TB, name string) {
-	tb.Helper()
-
-	root := testRepo.OpenRoot(tb)
-
-	err := root.Remove(name)
-	if err != nil {
-		tb.Fatalf("Remove(%q): %v", name, err)
-	}
-}
diff --git a/internal/testgit/repo_hash_object.go b/internal/testgit/repo_hash_object.go
deleted file mode 100644
index 75f1a7ab..00000000
--- a/internal/testgit/repo_hash_object.go
+++ /dev/null
@@ -1,20 +0,0 @@
-package testgit
-
-import (
-	"testing"
-
-	objectid "codeberg.org/lindenii/furgit/object/id"
-)
-
-// HashObject hashes and writes an object and returns its object ID.
-func (testRepo *TestRepo) HashObject(tb testing.TB, objType string, body []byte) objectid.ObjectID {
-	tb.Helper()
-	hex := testRepo.RunInput(tb, body, "hash-object", "-t", objType, "-w", "--stdin")
-
-	id, err := objectid.ParseHex(testRepo.algo, hex)
-	if err != nil {
-		tb.Fatalf("parse git hash-object output %q: %v", hex, err)
-	}
-
-	return id
-}
diff --git a/internal/testgit/repo_make_commit.go b/internal/testgit/repo_make_commit.go
deleted file mode 100644
index 32a063f7..00000000
--- a/internal/testgit/repo_make_commit.go
+++ /dev/null
@@ -1,16 +0,0 @@
-package testgit
-
-import (
-	"testing"
-
-	objectid "codeberg.org/lindenii/furgit/object/id"
-)
-
-// MakeCommit creates a commit over a single-file tree and returns (blobID, treeID, commitID).
-func (testRepo *TestRepo) MakeCommit(tb testing.TB, message string) (objectid.ObjectID, objectid.ObjectID, objectid.ObjectID) {
-	tb.Helper()
-	blobID, treeID := testRepo.MakeSingleFileTree(tb, "file.txt", []byte("commit-body\n"))
-	commitID := testRepo.CommitTree(tb, treeID, message)
-
-	return blobID, treeID, commitID
-}
diff --git a/internal/testgit/repo_make_many_objects_history.go b/internal/testgit/repo_make_many_objects_history.go
deleted file mode 100644
index f71ead2c..00000000
--- a/internal/testgit/repo_make_many_objects_history.go
+++ /dev/null
@@ -1,83 +0,0 @@
-package testgit
-
-import (
-	"fmt"
-	"strings"
-	"testing"
-
-	objectid "codeberg.org/lindenii/furgit/object/id"
-)
-
-const (
-	manyObjectsMainCommits = 640
-	manyObjectsDevCommits  = 220
-)
-
-// MakeManyObjectsHistory creates a large commit graph.
-func (testRepo *TestRepo) MakeManyObjectsHistory(tb testing.TB) {
-	tb.Helper()
-
-	var (
-		mainTip objectid.ObjectID
-		devTip  objectid.ObjectID
-		hasMain bool
-		hasDev  bool
-	)
-
-	for i := range manyObjectsMainCommits {
-		tree := testRepo.makeManyObjectsTree(tb, "main", i, 3)
-
-		var commit objectid.ObjectID
-		if hasMain {
-			commit = testRepo.CommitTree(tb, tree, fmt.Sprintf("main-%04d", i), mainTip)
-		} else {
-			commit = testRepo.CommitTree(tb, tree, fmt.Sprintf("main-%04d", i))
-			hasMain = true
-		}
-
-		mainTip = commit
-		if i%64 == 0 {
-			testRepo.TagAnnotated(tb, fmt.Sprintf("main-v%04d", i), mainTip, fmt.Sprintf("tag-main-%04d", i))
-		}
-	}
-
-	devTip = mainTip
-	hasDev = true
-
-	for i := range manyObjectsDevCommits {
-		tree := testRepo.makeManyObjectsTree(tb, "dev", i, 4)
-		commit := testRepo.CommitTree(tb, tree, fmt.Sprintf("dev-%04d", i), devTip)
-		devTip = commit
-
-		if i > 0 && i%55 == 0 {
-			mergeTree := testRepo.makeManyObjectsTree(tb, "merge", i, 2)
-
-			mainTip = testRepo.CommitTree(tb, mergeTree, fmt.Sprintf("merge-%04d", i), mainTip, devTip)
-			if i%110 == 0 {
-				testRepo.TagAnnotated(tb, fmt.Sprintf("merge-v%04d", i), mainTip, fmt.Sprintf("tag-merge-%04d", i))
-			}
-		}
-	}
-
-	if hasMain {
-		testRepo.UpdateRef(tb, "refs/heads/main", mainTip)
-	}
-
-	if hasDev {
-		testRepo.UpdateRef(tb, "refs/heads/dev", devTip)
-	}
-}
-
-// makeManyObjectsTree builds one synthetic tree with fanout blobs.
-func (testRepo *TestRepo) makeManyObjectsTree(tb testing.TB, prefix string, i int, files int) objectid.ObjectID {
-	tb.Helper()
-
-	lines := make([]string, 0, files)
-	for j := range files {
-		body := fmt.Appendf(nil, "%s-%04d-%02d\n%s\n", prefix, i, j, strings.Repeat("x", 160+(i+j)%96))
-		blobID := testRepo.HashObject(tb, "blob", body)
-		lines = append(lines, fmt.Sprintf("100644 blob %s\t%s_%04d_%02d.txt\n", blobID.String(), prefix, i, j))
-	}
-
-	return testRepo.Mktree(tb, strings.Join(lines, ""))
-}
diff --git a/internal/testgit/repo_make_single_file_tree.go b/internal/testgit/repo_make_single_file_tree.go
deleted file mode 100644
index ace98e8a..00000000
--- a/internal/testgit/repo_make_single_file_tree.go
+++ /dev/null
@@ -1,18 +0,0 @@
-package testgit
-
-import (
-	"fmt"
-	"testing"
-
-	objectid "codeberg.org/lindenii/furgit/object/id"
-)
-
-// MakeSingleFileTree writes one blob and one tree entry for it and returns (blobID, treeID).
-func (testRepo *TestRepo) MakeSingleFileTree(tb testing.TB, fileName string, fileContent []byte) (objectid.ObjectID, objectid.ObjectID) {
-	tb.Helper()
-	blobID := testRepo.HashObject(tb, "blob", fileContent)
-	treeInput := fmt.Sprintf("100644 blob %s\t%s\n", blobID.String(), fileName)
-	treeID := testRepo.Mktree(tb, treeInput)
-
-	return blobID, treeID
-}
diff --git a/internal/testgit/repo_mktree.go b/internal/testgit/repo_mktree.go
deleted file mode 100644
index 893d211e..00000000
--- a/internal/testgit/repo_mktree.go
+++ /dev/null
@@ -1,20 +0,0 @@
-package testgit
-
-import (
-	"testing"
-
-	objectid "codeberg.org/lindenii/furgit/object/id"
-)
-
-// Mktree creates a tree from textual mktree input and returns its ID.
-func (testRepo *TestRepo) Mktree(tb testing.TB, input string) objectid.ObjectID {
-	tb.Helper()
-	hex := testRepo.RunInput(tb, []byte(input), "mktree")
-
-	id, err := objectid.ParseHex(testRepo.algo, hex)
-	if err != nil {
-		tb.Fatalf("parse mktree output %q: %v", hex, err)
-	}
-
-	return id
-}
diff --git a/internal/testgit/repo_new.go b/internal/testgit/repo_new.go
deleted file mode 100644
index b7c9968b..00000000
--- a/internal/testgit/repo_new.go
+++ /dev/null
@@ -1,64 +0,0 @@
-package testgit
-
-import (
-	"os"
-	"testing"
-
-	objectid "codeberg.org/lindenii/furgit/object/id"
-)
-
-// RepoOptions controls git-init options for test repositories.
-type RepoOptions struct {
-	// ObjectFormat is the object ID algorithm used for repository objects.
-	ObjectFormat objectid.Algorithm
-	// Bare selects whether the repository is initialized as bare.
-	Bare bool
-	// RefFormat selects the git ref storage format (for example "files" or
-	// "reftable"). Empty means git's default format.
-	RefFormat string
-}
-
-// NewRepo creates a temporary repository initialized with the requested options.
-func NewRepo(tb testing.TB, opts RepoOptions) *TestRepo {
-	tb.Helper()
-
-	algo := opts.ObjectFormat
-	if algo.Size() == 0 {
-		tb.Fatalf("invalid algorithm: %v", algo)
-	}
-
-	dir := tb.TempDir()
-
-	testRepo := &TestRepo{
-		dir:  dir,
-		algo: algo,
-		env:  defaultEnv(),
-	}
-
-	args := []string{"init", "--object-format=" + algo.String()}
-	if opts.Bare {
-		args = append(args, "--bare")
-	}
-
-	if opts.RefFormat != "" {
-		args = append(args, "--ref-format="+opts.RefFormat)
-	}
-
-	args = append(args, dir)
-	testRepo.runBytes(tb, nil, "", args...)
-
-	return testRepo
-}
-
-func defaultEnv() []string {
-	return append(os.Environ(),
-		"GIT_CONFIG_GLOBAL=/dev/null",
-		"GIT_CONFIG_SYSTEM=/dev/null",
-		"GIT_AUTHOR_NAME=Test Author",
-		"GIT_AUTHOR_EMAIL=test@example.org",
-		"GIT_COMMITTER_NAME=Test Committer",
-		"GIT_COMMITTER_EMAIL=committer@example.org",
-		"GIT_AUTHOR_DATE=1234567890 +0000",
-		"GIT_COMMITTER_DATE=1234567890 +0000",
-	)
-}
diff --git a/internal/testgit/repo_open_commit_graph.go b/internal/testgit/repo_open_commit_graph.go
deleted file mode 100644
index 4db7261b..00000000
--- a/internal/testgit/repo_open_commit_graph.go
+++ /dev/null
@@ -1,26 +0,0 @@
-package testgit
-
-import (
-	"testing"
-
-	commitgraphread "codeberg.org/lindenii/furgit/format/commitgraph/read"
-)
-
-// OpenCommitGraph opens the repository commit-graph and registers cleanup on
-// the caller.
-func (testRepo *TestRepo) OpenCommitGraph(tb testing.TB) *commitgraphread.Reader {
-	tb.Helper()
-
-	objectsRoot := testRepo.OpenObjectsRoot(tb)
-
-	graph, err := commitgraphread.Open(objectsRoot, testRepo.Algorithm(), commitgraphread.OpenSingle)
-	if err != nil {
-		tb.Fatalf("commitgraphread.Open: %v", err)
-	}
-
-	tb.Cleanup(func() {
-		_ = graph.Close()
-	})
-
-	return graph
-}
diff --git a/internal/testgit/repo_open_object_store.go b/internal/testgit/repo_open_object_store.go
deleted file mode 100644
index 42dc370c..00000000
--- a/internal/testgit/repo_open_object_store.go
+++ /dev/null
@@ -1,29 +0,0 @@
-package testgit
-
-import (
-	"testing"
-
-	objectstore "codeberg.org/lindenii/furgit/object/store"
-	"codeberg.org/lindenii/furgit/repository"
-)
-
-// OpenObjectStore opens the repository object store and registers cleanup on
-// the caller.
-//
-//nolint:ireturn
-func (testRepo *TestRepo) OpenObjectStore(tb testing.TB) objectstore.Reader {
-	tb.Helper()
-
-	root := testRepo.OpenGitRoot(tb)
-
-	repo, err := repository.Open(root)
-	if err != nil {
-		tb.Fatalf("repository.Open: %v", err)
-	}
-
-	tb.Cleanup(func() {
-		_ = repo.Close()
-	})
-
-	return repo.Objects()
-}
diff --git a/internal/testgit/repo_open_repository.go b/internal/testgit/repo_open_repository.go
deleted file mode 100644
index fbc98383..00000000
--- a/internal/testgit/repo_open_repository.go
+++ /dev/null
@@ -1,25 +0,0 @@
-package testgit
-
-import (
-	"testing"
-
-	"codeberg.org/lindenii/furgit/repository"
-)
-
-// OpenRepository opens the repository and registers cleanup on the caller.
-func (testRepo *TestRepo) OpenRepository(tb testing.TB) *repository.Repository {
-	tb.Helper()
-
-	root := testRepo.OpenGitRoot(tb)
-
-	repo, err := repository.Open(root)
-	if err != nil {
-		tb.Fatalf("repository.Open: %v", err)
-	}
-
-	tb.Cleanup(func() {
-		_ = repo.Close()
-	})
-
-	return repo
-}
diff --git a/internal/testgit/repo_open_root.go b/internal/testgit/repo_open_root.go
deleted file mode 100644
index 4530c604..00000000
--- a/internal/testgit/repo_open_root.go
+++ /dev/null
@@ -1,87 +0,0 @@
-package testgit
-
-import (
-	"errors"
-	"os"
-	"testing"
-)
-
-// OpenRoot opens the repository root directory and registers cleanup on the
-// caller.
-func (testRepo *TestRepo) OpenRoot(tb testing.TB) *os.Root {
-	tb.Helper()
-
-	root, err := os.OpenRoot(testRepo.dir)
-	if err != nil {
-		tb.Fatalf("os.OpenRoot: %v", err)
-	}
-
-	tb.Cleanup(func() {
-		_ = root.Close()
-	})
-
-	return root
-}
-
-// OpenGitRoot opens the repository gitdir and registers cleanup on the caller.
-//
-// For bare repositories, this is the repository root itself. For non-bare
-// repositories, this is the .git directory under the worktree root.
-func (testRepo *TestRepo) OpenGitRoot(tb testing.TB) *os.Root {
-	tb.Helper()
-
-	repoRoot := testRepo.OpenRoot(tb)
-
-	gitRoot, err := repoRoot.OpenRoot(".git")
-	if err == nil {
-		tb.Cleanup(func() {
-			_ = gitRoot.Close()
-		})
-
-		return gitRoot
-	}
-
-	if !errors.Is(err, os.ErrNotExist) {
-		tb.Fatalf("OpenRoot(.git): %v", err)
-	}
-
-	return repoRoot
-}
-
-// OpenObjectsRoot opens the objects directory and registers cleanup on the
-// caller.
-func (testRepo *TestRepo) OpenObjectsRoot(tb testing.TB) *os.Root {
-	tb.Helper()
-
-	gitRoot := testRepo.OpenGitRoot(tb)
-
-	objectsRoot, err := gitRoot.OpenRoot("objects")
-	if err != nil {
-		tb.Fatalf("OpenRoot(objects): %v", err)
-	}
-
-	tb.Cleanup(func() {
-		_ = objectsRoot.Close()
-	})
-
-	return objectsRoot
-}
-
-// OpenPackRoot opens the objects/pack directory and registers cleanup on the
-// caller.
-func (testRepo *TestRepo) OpenPackRoot(tb testing.TB) *os.Root {
-	tb.Helper()
-
-	objectsRoot := testRepo.OpenObjectsRoot(tb)
-
-	packRoot, err := objectsRoot.OpenRoot("pack")
-	if err != nil {
-		tb.Fatalf("OpenRoot(pack): %v", err)
-	}
-
-	tb.Cleanup(func() {
-		_ = packRoot.Close()
-	})
-
-	return packRoot
-}
diff --git a/internal/testgit/repo_pack_objects_is_thin.go b/internal/testgit/repo_pack_objects_is_thin.go
deleted file mode 100644
index c37b6d27..00000000
--- a/internal/testgit/repo_pack_objects_is_thin.go
+++ /dev/null
@@ -1,77 +0,0 @@
-package testgit
-
-import (
-	"os/exec"
-	"strings"
-	"testing"
-)
-
-// PackObjectsIsThin reports whether git emits one thin pack for the given revs.
-//
-// It streams `git pack-objects --stdout --revs --thin` into `git index-pack
-// --stdin` in one scratch bare repository. A failure in index-pack due to
-// unresolved deltas is treated as confirmation that the emitted pack is thin.
-func (testRepo *TestRepo) PackObjectsIsThin(tb testing.TB, revs []string) bool {
-	tb.Helper()
-
-	scratch := NewRepo(tb, RepoOptions{ObjectFormat: testRepo.algo, Bare: true})
-
-	packArgs := []string{"pack-objects", "--stdout", "--revs", "--thin"}
-	//nolint:noctx
-	packCmd := exec.Command("git", packArgs...) //#nosec G204
-	packCmd.Dir = testRepo.dir
-	packCmd.Env = testRepo.env
-	packCmd.Stdin = strings.NewReader(strings.Join(revs, "\n") + "\n")
-	packStderr := &strings.Builder{}
-	packCmd.Stderr = packStderr
-
-	packStdout, err := packCmd.StdoutPipe()
-	if err != nil {
-		tb.Fatalf("git %v stdout pipe: %v", packArgs, err)
-	}
-
-	indexArgs := []string{"index-pack", "--stdin"}
-	//nolint:noctx
-	indexCmd := exec.Command("git", indexArgs...) //#nosec G204
-	indexCmd.Dir = scratch.dir
-	indexCmd.Env = scratch.env
-	indexCmd.Stdin = packStdout
-	indexStderr := &strings.Builder{}
-	indexCmd.Stderr = indexStderr
-
-	err = indexCmd.Start()
-	if err != nil {
-		tb.Fatalf("git %v start failed: %v", indexArgs, err)
-	}
-
-	err = packCmd.Start()
-	if err != nil {
-		_ = indexCmd.Process.Kill()
-		_ = indexCmd.Wait()
-
-		tb.Fatalf("git %v start failed: %v", packArgs, err)
-	}
-
-	packErr := packCmd.Wait()
-	if packErr != nil {
-		tb.Fatalf("git %v failed: %v\n%s", packArgs, packErr, packStderr.String())
-	}
-
-	indexErr := indexCmd.Wait()
-	if indexErr == nil {
-		return false
-	}
-
-	stderr := strings.ToLower(indexStderr.String())
-	if strings.Contains(stderr, "unresolved") && strings.Contains(stderr, "delta") {
-		return true
-	}
-
-	if strings.Contains(stderr, "missing") && strings.Contains(stderr, "base") {
-		return true
-	}
-
-	tb.Fatalf("git %v failed unexpectedly: %v\n%s", indexArgs, indexErr, indexStderr.String())
-
-	return false
-}
diff --git a/internal/testgit/repo_pack_objects_reader.go b/internal/testgit/repo_pack_objects_reader.go
deleted file mode 100644
index dc997514..00000000
--- a/internal/testgit/repo_pack_objects_reader.go
+++ /dev/null
@@ -1,94 +0,0 @@
-package testgit
-
-import (
-	"fmt"
-	"io"
-	"os/exec"
-	"strings"
-	"sync"
-	"testing"
-)
-
-// packObjectsReadCloser wraps a pipe reader and process wait fn.
-type packObjectsReadCloser struct {
-	reader io.ReadCloser
-	wait   func() error
-	once   sync.Once
-}
-
-// Read proxies reads to the wrapped reader.
-func (reader *packObjectsReadCloser) Read(dst []byte) (int, error) {
-	return reader.reader.Read(dst)
-}
-
-// Close closes the stream and waits for the underlying process.
-func (reader *packObjectsReadCloser) Close() error {
-	var out error
-
-	reader.once.Do(func() {
-		errClose := reader.reader.Close()
-		errWait := reader.wait()
-
-		if errClose != nil {
-			out = errClose
-
-			return
-		}
-
-		out = errWait
-	})
-
-	return out
-}
-
-// PackObjectsReader streams `git pack-objects --stdout --revs` output.
-func (testRepo *TestRepo) PackObjectsReader(tb testing.TB, revs []string, thin bool) io.ReadCloser {
-	tb.Helper()
-
-	args := []string{"pack-objects", "--stdout", "--revs"}
-	if thin {
-		args = append(args, "--thin")
-	}
-
-	//nolint:noctx
-	cmd := exec.Command("git", args...) //#nosec G204
-	cmd.Dir = testRepo.dir
-	cmd.Env = testRepo.env
-	cmd.Stdin = strings.NewReader(strings.Join(revs, "\n") + "\n")
-
-	pr, pw := io.Pipe()
-	cmd.Stdout = pw
-	stderr := &strings.Builder{}
-	cmd.Stderr = stderr
-
-	waitDone := make(chan error, 1)
-
-	go func() {
-		err := cmd.Start()
-		if err != nil {
-			_ = pw.CloseWithError(fmt.Errorf("git %v start failed: %w", args, err))
-
-			waitDone <- nil
-
-			return
-		}
-
-		err = cmd.Wait()
-		if err != nil {
-			_ = pw.CloseWithError(fmt.Errorf("git %v failed: %w\n%s", args, err, stderr.String()))
-		} else {
-			_ = pw.Close()
-		}
-
-		waitDone <- nil
-	}()
-
-	return &packObjectsReadCloser{
-		reader: pr,
-		wait: func() error {
-			<-waitDone
-
-			return nil
-		},
-	}
-}
diff --git a/internal/testgit/repo_properties.go b/internal/testgit/repo_properties.go
deleted file mode 100644
index d46e9030..00000000
--- a/internal/testgit/repo_properties.go
+++ /dev/null
@@ -1,20 +0,0 @@
-package testgit
-
-import objectid "codeberg.org/lindenii/furgit/object/id"
-
-// Algorithm returns the object ID algorithm configured for this repository.
-func (testRepo *TestRepo) Algorithm() objectid.Algorithm {
-	return testRepo.algo
-}
-
-// Env returns a copy of the environment used for git subprocesses.
-func (testRepo *TestRepo) Env() []string {
-	return append([]string(nil), testRepo.env...)
-}
-
-// DirButYouShouldReallyNotUseThisYouShouldReallyConsiderUsingAProperCapabilityInterfaceInsteadAndIAmKeepingThisMethodIntentionallyLongToAnnoyYou returns the git dir of a repo.
-// Consider using a properly capability interface such as
-// os.Root instead; all uses of ambient path authority must be justified.
-func (testRepo *TestRepo) DirButYouShouldReallyNotUseThisYouShouldReallyConsiderUsingAProperCapabilityInterfaceInsteadAndIAmKeepingThisMethodIntentionallyLongToAnnoyYou() string {
-	return testRepo.dir
-}
diff --git a/internal/testgit/repo_refs.go b/internal/testgit/repo_refs.go
deleted file mode 100644
index a92e1658..00000000
--- a/internal/testgit/repo_refs.go
+++ /dev/null
@@ -1,48 +0,0 @@
-package testgit
-
-import (
-	"strings"
-	"testing"
-
-	objectid "codeberg.org/lindenii/furgit/object/id"
-)
-
-// UpdateRef updates a ref to point at id.
-func (testRepo *TestRepo) UpdateRef(tb testing.TB, name string, id objectid.ObjectID) {
-	tb.Helper()
-	testRepo.Run(tb, "update-ref", name, id.String())
-}
-
-// DeleteRef deletes a ref.
-func (testRepo *TestRepo) DeleteRef(tb testing.TB, name string) {
-	tb.Helper()
-	testRepo.Run(tb, "update-ref", "-d", name)
-}
-
-// SymbolicRef sets a symbolic reference target.
-func (testRepo *TestRepo) SymbolicRef(tb testing.TB, name, target string) {
-	tb.Helper()
-	testRepo.Run(tb, "symbolic-ref", name, target)
-}
-
-// PackRefs runs git pack-refs with args.
-func (testRepo *TestRepo) PackRefs(tb testing.TB, args ...string) {
-	tb.Helper()
-
-	cmd := append([]string{"pack-refs"}, args...)
-	testRepo.Run(tb, cmd...)
-}
-
-// ShowRef returns lines from git show-ref output.
-func (testRepo *TestRepo) ShowRef(tb testing.TB, args ...string) []string {
-	tb.Helper()
-
-	cmd := append([]string{"show-ref"}, args...)
-
-	out := testRepo.Run(tb, cmd...)
-	if strings.TrimSpace(out) == "" {
-		return nil
-	}
-
-	return strings.Split(strings.TrimSpace(out), "\n")
-}
diff --git a/internal/testgit/repo_remove_loose_object.go b/internal/testgit/repo_remove_loose_object.go
deleted file mode 100644
index 345d9db7..00000000
--- a/internal/testgit/repo_remove_loose_object.go
+++ /dev/null
@@ -1,22 +0,0 @@
-package testgit
-
-import (
-	"fmt"
-	"testing"
-
-	objectid "codeberg.org/lindenii/furgit/object/id"
-)
-
-// RemoveLooseObject removes one loose object file from the repository.
-func (testRepo *TestRepo) RemoveLooseObject(tb testing.TB, id objectid.ObjectID) {
-	tb.Helper()
-
-	root := testRepo.OpenObjectsRoot(tb)
-	hex := id.String()
-	path := fmt.Sprintf("%s/%s", hex[:2], hex[2:])
-
-	err := root.Remove(path)
-	if err != nil {
-		tb.Fatalf("remove loose object %s: %v", id, err)
-	}
-}
diff --git a/internal/testgit/repo_repack.go b/internal/testgit/repo_repack.go
deleted file mode 100644
index 7773ac13..00000000
--- a/internal/testgit/repo_repack.go
+++ /dev/null
@@ -1,13 +0,0 @@
-package testgit
-
-import "testing"
-
-// Repack runs "git repack" with args in the repository.
-func (testRepo *TestRepo) Repack(tb testing.TB, args ...string) {
-	tb.Helper()
-
-	cmdArgs := make([]string, 0, len(args)+1)
-	cmdArgs = append(cmdArgs, "repack")
-	cmdArgs = append(cmdArgs, args...)
-	_ = testRepo.Run(tb, cmdArgs...)
-}
diff --git a/internal/testgit/repo_rev_list.go b/internal/testgit/repo_rev_list.go
deleted file mode 100644
index 6b0c4f76..00000000
--- a/internal/testgit/repo_rev_list.go
+++ /dev/null
@@ -1,37 +0,0 @@
-package testgit
-
-import (
-	"strings"
-	"testing"
-
-	objectid "codeberg.org/lindenii/furgit/object/id"
-)
-
-// RevList runs "git rev-list" with args and parses one object ID per line.
-func (testRepo *TestRepo) RevList(tb testing.TB, args ...string) []objectid.ObjectID {
-	tb.Helper()
-
-	cmdArgs := make([]string, 0, len(args)+1)
-	cmdArgs = append(cmdArgs, "rev-list")
-	cmdArgs = append(cmdArgs, args...)
-	out := testRepo.Run(tb, cmdArgs...)
-
-	lines := strings.Split(strings.TrimSpace(out), "\n")
-
-	outIDs := make([]objectid.ObjectID, 0, len(lines))
-	for _, line := range lines {
-		line = strings.TrimSpace(line)
-		if line == "" {
-			continue
-		}
-
-		id, err := objectid.ParseHex(testRepo.algo, line)
-		if err != nil {
-			tb.Fatalf("parse rev-list oid %q: %v", line, err)
-		}
-
-		outIDs = append(outIDs, id)
-	}
-
-	return outIDs
-}
diff --git a/internal/testgit/repo_rev_parse.go b/internal/testgit/repo_rev_parse.go
deleted file mode 100644
index fcdee605..00000000
--- a/internal/testgit/repo_rev_parse.go
+++ /dev/null
@@ -1,20 +0,0 @@
-package testgit
-
-import (
-	"testing"
-
-	objectid "codeberg.org/lindenii/furgit/object/id"
-)
-
-// RevParse resolves rev expressions to object IDs.
-func (testRepo *TestRepo) RevParse(tb testing.TB, spec string) objectid.ObjectID {
-	tb.Helper()
-	hex := testRepo.Run(tb, "rev-parse", spec)
-
-	id, err := objectid.ParseHex(testRepo.algo, hex)
-	if err != nil {
-		tb.Fatalf("parse rev-parse output %q: %v", hex, err)
-	}
-
-	return id
-}
diff --git a/internal/testgit/repo_run.go b/internal/testgit/repo_run.go
deleted file mode 100644
index 448b88f0..00000000
--- a/internal/testgit/repo_run.go
+++ /dev/null
@@ -1,95 +0,0 @@
-package testgit
-
-import (
-	"bytes"
-	"os/exec"
-	"strings"
-	"testing"
-)
-
-// Run executes git and returns trimmed textual output.
-func (testRepo *TestRepo) Run(tb testing.TB, args ...string) string {
-	tb.Helper()
-	out := testRepo.runBytes(tb, nil, testRepo.dir, args...)
-
-	return strings.TrimSpace(string(out))
-}
-
-// RunBytes executes git and returns raw output bytes.
-func (testRepo *TestRepo) RunBytes(tb testing.TB, args ...string) []byte {
-	tb.Helper()
-
-	return testRepo.runBytes(tb, nil, testRepo.dir, args...)
-}
-
-// RunE executes git and returns trimmed textual output plus any command error.
-func (testRepo *TestRepo) RunE(tb testing.TB, args ...string) (string, error) {
-	tb.Helper()
-
-	out, err := testRepo.runBytesE(nil, testRepo.dir, args...)
-
-	return strings.TrimSpace(string(out)), err
-}
-
-// RunInput executes git with stdin and returns trimmed textual output.
-func (testRepo *TestRepo) RunInput(tb testing.TB, stdin []byte, args ...string) string {
-	tb.Helper()
-	out := testRepo.runBytes(tb, stdin, testRepo.dir, args...)
-
-	return strings.TrimSpace(string(out))
-}
-
-// RunInputBytes executes git with stdin and returns raw output bytes.
-func (testRepo *TestRepo) RunInputBytes(tb testing.TB, stdin []byte, args ...string) []byte {
-	tb.Helper()
-
-	return testRepo.runBytes(tb, stdin, testRepo.dir, args...)
-}
-
-func (testRepo *TestRepo) runBytes(tb testing.TB, stdin []byte, dir string, args ...string) []byte {
-	tb.Helper()
-
-	out, err := testRepo.runBytesE(stdin, dir, args...)
-	if err != nil {
-		tb.Fatalf("git %v failed: %v\n%s", args, err, out)
-	}
-
-	return out
-}
-
-func (testRepo *TestRepo) runBytesE(stdin []byte, dir string, args ...string) ([]byte, error) {
-	return testRepo.runBytesWithEnvNoHelper(stdin, dir, testRepo.env, args...)
-}
-
-// runBytesWithEnv executes git using the supplied environment.
-func (testRepo *TestRepo) runBytesWithEnv(
-	tb testing.TB,
-	stdin []byte,
-	dir string,
-	env []string,
-	args ...string,
-) ([]byte, error) {
-	tb.Helper()
-
-	return testRepo.runBytesWithEnvNoHelper(stdin, dir, env, args...)
-}
-
-// runBytesWithEnvNoHelper executes git using the supplied environment without
-// touching testing helper state.
-func (testRepo *TestRepo) runBytesWithEnvNoHelper(
-	stdin []byte,
-	dir string,
-	env []string,
-	args ...string,
-) ([]byte, error) {
-	//nolint:noctx
-	cmd := exec.Command("git", args...) //#nosec G204
-	cmd.Dir = dir
-
-	cmd.Env = env
-	if stdin != nil {
-		cmd.Stdin = bytes.NewReader(stdin)
-	}
-
-	return cmd.CombinedOutput()
-}
diff --git a/internal/testgit/repo_run_extra_files.go b/internal/testgit/repo_run_extra_files.go
deleted file mode 100644
index 4629c872..00000000
--- a/internal/testgit/repo_run_extra_files.go
+++ /dev/null
@@ -1,55 +0,0 @@
-package testgit
-
-import (
-	"bytes"
-	"context"
-	"os"
-	"os/exec"
-	"testing"
-)
-
-// RunWithExtraFilesE executes git with inherited extra files and returns split
-// stdout/stderr plus any command error.
-func (testRepo *TestRepo) RunWithExtraFilesE(
-	tb testing.TB,
-	extraFiles []*os.File,
-	args ...string,
-) ([]byte, []byte, error) {
-	tb.Helper()
-
-	return testRepo.RunWithExtraFilesEnvContextE(
-		tb,
-		context.Background(),
-		nil,
-		extraFiles,
-		args...,
-	)
-}
-
-// RunWithExtraFilesEnvContextE executes git with inherited extra files, extra
-// environment, and context cancellation, returning split stdout/stderr plus any
-// command error.
-func (testRepo *TestRepo) RunWithExtraFilesEnvContextE(
-	tb testing.TB,
-	ctx context.Context,
-	extraEnv []string,
-	extraFiles []*os.File,
-	args ...string,
-) ([]byte, []byte, error) {
-	tb.Helper()
-
-	cmd := exec.CommandContext(ctx, "git", args...) //#nosec G204
-	cmd.Dir = testRepo.dir
-	cmd.Env = testRepo.env
-	cmd.Env = append(cmd.Env, extraEnv...)
-	cmd.ExtraFiles = append([]*os.File(nil), extraFiles...)
-
-	var stdout, stderr bytes.Buffer
-
-	cmd.Stdout = &stdout
-	cmd.Stderr = &stderr
-
-	err := cmd.Run()
-
-	return stdout.Bytes(), stderr.Bytes(), err
-}
diff --git a/internal/testgit/repo_tag_annotated.go b/internal/testgit/repo_tag_annotated.go
deleted file mode 100644
index cf6e9b3d..00000000
--- a/internal/testgit/repo_tag_annotated.go
+++ /dev/null
@@ -1,15 +0,0 @@
-package testgit
-
-import (
-	"testing"
-
-	objectid "codeberg.org/lindenii/furgit/object/id"
-)
-
-// TagAnnotated creates an annotated tag object and returns the resulting tag object ID.
-func (testRepo *TestRepo) TagAnnotated(tb testing.TB, name string, target objectid.ObjectID, message string) objectid.ObjectID {
-	tb.Helper()
-	testRepo.Run(tb, "tag", "-a", name, target.String(), "-m", message)
-
-	return testRepo.RevParse(tb, "refs/tags/"+name)
-}