object/store: Rename from object/storer

84 files changed, 4 insertions, 4195 deletions

diff --git a/object/blob/blob.go b/object/blob/blob.go
index 977121fb..4ec98fb0 100644
--- a/object/blob/blob.go
+++ b/object/blob/blob.go
@@ -4,7 +4,7 @@ package blob
 // Blob represents a Git blob object.
 //
 // This Blob object is fully materialized in memory.
-// Consider using objectstorer/Store.ReadReaderContent,
+// Consider using objectstore/Store.ReadReaderContent,
 // or appropriate streaming write APIs.
 type Blob struct {
 	Data []byte
diff --git a/object/fetch/fetcher.go b/object/fetch/fetcher.go
index ed4e74a1..b0c3d099 100644
--- a/object/fetch/fetcher.go
+++ b/object/fetch/fetcher.go
@@ -1,17 +1,17 @@
 package fetch
 
-import objectstorer "codeberg.org/lindenii/furgit/object/storer"
+import objectstore "codeberg.org/lindenii/furgit/object/store"
 
 // Fetcher resolves parsed and streamed objects from an object store.
 //
 // A Fetcher does not take ownership of the store and does not close it.
 type Fetcher struct {
-	store objectstorer.Store
+	store objectstore.Store
 }
 
 // New returns a Fetcher that reads objects from store.
 //
 // The returned Fetcher does not take ownership of store.
-func New(store objectstorer.Store) *Fetcher {
+func New(store objectstore.Store) *Fetcher {
 	return &Fetcher{store: store}
 }
diff --git a/object/storer/chain/bytes.go b/object/storer/chain/bytes.go
deleted file mode 100644
index d41f3b92..00000000
--- a/object/storer/chain/bytes.go
+++ /dev/null
@@ -1,46 +0,0 @@
-package chain
-
-import (
-	"errors"
-	"fmt"
-
-	objectid "codeberg.org/lindenii/furgit/object/id"
-	objectstorer "codeberg.org/lindenii/furgit/object/storer"
-	objecttype "codeberg.org/lindenii/furgit/object/type"
-)
-
-// ReadBytesFull reads a full serialized object from the first backend that has it.
-func (chain *Chain) ReadBytesFull(id objectid.ObjectID) ([]byte, error) {
-	for i, backend := range chain.backends {
-		full, err := backend.ReadBytesFull(id)
-		if err == nil {
-			return full, nil
-		}
-
-		if errors.Is(err, objectstorer.ErrObjectNotFound) {
-			continue
-		}
-
-		return nil, fmt.Errorf("objectstorer: backend %d read bytes full: %w", i, err)
-	}
-
-	return nil, objectstorer.ErrObjectNotFound
-}
-
-// ReadBytesContent reads an object's type and content bytes from the first backend that has it.
-func (chain *Chain) ReadBytesContent(id objectid.ObjectID) (objecttype.Type, []byte, error) {
-	for i, backend := range chain.backends {
-		ty, content, err := backend.ReadBytesContent(id)
-		if err == nil {
-			return ty, content, nil
-		}
-
-		if errors.Is(err, objectstorer.ErrObjectNotFound) {
-			continue
-		}
-
-		return objecttype.TypeInvalid, nil, fmt.Errorf("objectstorer: backend %d read bytes content: %w", i, err)
-	}
-
-	return objecttype.TypeInvalid, nil, objectstorer.ErrObjectNotFound
-}
diff --git a/object/storer/chain/chain.go b/object/storer/chain/chain.go
deleted file mode 100644
index 44909cff..00000000
--- a/object/storer/chain/chain.go
+++ /dev/null
@@ -1,12 +0,0 @@
-// Package chain provides a wrapper object storage backend to query a chain of
-// backends.
-package chain
-
-import objectstorer "codeberg.org/lindenii/furgit/object/storer"
-
-// Chain queries multiple object databases in order.
-//
-// Chain borrows its backend stores.
-type Chain struct {
-	backends []objectstorer.Store
-}
diff --git a/object/storer/chain/close.go b/object/storer/chain/close.go
deleted file mode 100644
index 6bd74565..00000000
--- a/object/storer/chain/close.go
+++ /dev/null
@@ -1,8 +0,0 @@
-package chain
-
-// Close releases wrapper-local resources.
-//
-// Chain borrows its backends, so Close does not close them.
-//
-// Repeated calls to Close are undefined behavior.
-func (chain *Chain) Close() error { return nil }
diff --git a/object/storer/chain/header.go b/object/storer/chain/header.go
deleted file mode 100644
index 4feaf8e4..00000000
--- a/object/storer/chain/header.go
+++ /dev/null
@@ -1,28 +0,0 @@
-package chain
-
-import (
-	"errors"
-	"fmt"
-
-	objectid "codeberg.org/lindenii/furgit/object/id"
-	objectstorer "codeberg.org/lindenii/furgit/object/storer"
-	objecttype "codeberg.org/lindenii/furgit/object/type"
-)
-
-// ReadHeader reads object header data from the first backend that has it.
-func (chain *Chain) ReadHeader(id objectid.ObjectID) (objecttype.Type, int64, error) {
-	for i, backend := range chain.backends {
-		ty, size, err := backend.ReadHeader(id)
-		if err == nil {
-			return ty, size, nil
-		}
-
-		if errors.Is(err, objectstorer.ErrObjectNotFound) {
-			continue
-		}
-
-		return objecttype.TypeInvalid, 0, fmt.Errorf("objectstorer: backend %d read header: %w", i, err)
-	}
-
-	return objecttype.TypeInvalid, 0, objectstorer.ErrObjectNotFound
-}
diff --git a/object/storer/chain/new.go b/object/storer/chain/new.go
deleted file mode 100644
index 0368bfb3..00000000
--- a/object/storer/chain/new.go
+++ /dev/null
@@ -1,13 +0,0 @@
-package chain
-
-import objectstorer "codeberg.org/lindenii/furgit/object/storer"
-
-// New creates an ordered object database chain.
-//
-// The provided backends must be non-nil and distinct.
-// Chain borrows the provided backends and does not close them in Close.
-func New(backends ...objectstorer.Store) *Chain {
-	return &Chain{
-		backends: append([]objectstorer.Store(nil), backends...),
-	}
-}
diff --git a/object/storer/chain/reader.go b/object/storer/chain/reader.go
deleted file mode 100644
index e3c50013..00000000
--- a/object/storer/chain/reader.go
+++ /dev/null
@@ -1,47 +0,0 @@
-package chain
-
-import (
-	"errors"
-	"fmt"
-	"io"
-
-	objectid "codeberg.org/lindenii/furgit/object/id"
-	objectstorer "codeberg.org/lindenii/furgit/object/storer"
-	objecttype "codeberg.org/lindenii/furgit/object/type"
-)
-
-// ReadReaderFull reads a full serialized object stream from the first backend that has it.
-func (chain *Chain) ReadReaderFull(id objectid.ObjectID) (io.ReadCloser, error) {
-	for i, backend := range chain.backends {
-		reader, err := backend.ReadReaderFull(id)
-		if err == nil {
-			return reader, nil
-		}
-
-		if errors.Is(err, objectstorer.ErrObjectNotFound) {
-			continue
-		}
-
-		return nil, fmt.Errorf("objectstorer: backend %d read reader full: %w", i, err)
-	}
-
-	return nil, objectstorer.ErrObjectNotFound
-}
-
-// ReadReaderContent reads an object's type, declared content length, and content stream from the first backend that has it.
-func (chain *Chain) ReadReaderContent(id objectid.ObjectID) (objecttype.Type, int64, io.ReadCloser, error) {
-	for i, backend := range chain.backends {
-		ty, size, reader, err := backend.ReadReaderContent(id)
-		if err == nil {
-			return ty, size, reader, nil
-		}
-
-		if errors.Is(err, objectstorer.ErrObjectNotFound) {
-			continue
-		}
-
-		return objecttype.TypeInvalid, 0, nil, fmt.Errorf("objectstorer: backend %d read reader content: %w", i, err)
-	}
-
-	return objecttype.TypeInvalid, 0, nil, objectstorer.ErrObjectNotFound
-}
diff --git a/object/storer/chain/refresh.go b/object/storer/chain/refresh.go
deleted file mode 100644
index c47352dc..00000000
--- a/object/storer/chain/refresh.go
+++ /dev/null
@@ -1,17 +0,0 @@
-package chain
-
-import "errors"
-
-// Refresh forwards refresh calls to all backends.
-func (chain *Chain) Refresh() error {
-	var errs []error
-
-	for _, backend := range chain.backends {
-		err := backend.Refresh()
-		if err != nil {
-			errs = append(errs, err)
-		}
-	}
-
-	return errors.Join(errs...)
-}
diff --git a/object/storer/chain/size.go b/object/storer/chain/size.go
deleted file mode 100644
index c82b248d..00000000
--- a/object/storer/chain/size.go
+++ /dev/null
@@ -1,27 +0,0 @@
-package chain
-
-import (
-	"errors"
-	"fmt"
-
-	objectid "codeberg.org/lindenii/furgit/object/id"
-	objectstorer "codeberg.org/lindenii/furgit/object/storer"
-)
-
-// ReadSize reads object content length from the first backend that has it.
-func (chain *Chain) ReadSize(id objectid.ObjectID) (int64, error) {
-	for i, backend := range chain.backends {
-		size, err := backend.ReadSize(id)
-		if err == nil {
-			return size, nil
-		}
-
-		if errors.Is(err, objectstorer.ErrObjectNotFound) {
-			continue
-		}
-
-		return 0, fmt.Errorf("objectstorer: backend %d read size: %w", i, err)
-	}
-
-	return 0, objectstorer.ErrObjectNotFound
-}
diff --git a/object/storer/loose/helpers_test.go b/object/storer/loose/helpers_test.go
deleted file mode 100644
index 1ad0ece9..00000000
--- a/object/storer/loose/helpers_test.go
+++ /dev/null
@@ -1,107 +0,0 @@
-package loose_test
-
-import (
-	"io"
-	"os"
-	"testing"
-
-	"codeberg.org/lindenii/furgit/internal/testgit"
-	objectheader "codeberg.org/lindenii/furgit/object/header"
-	objectid "codeberg.org/lindenii/furgit/object/id"
-	"codeberg.org/lindenii/furgit/object/storer/loose"
-	objecttype "codeberg.org/lindenii/furgit/object/type"
-)
-
-func openLooseStore(t *testing.T, testRepo *testgit.TestRepo, algo objectid.Algorithm) *loose.Store {
-	t.Helper()
-
-	root := testRepo.OpenObjectsRoot(t)
-
-	store, err := loose.New(root, algo)
-	if err != nil {
-		t.Fatalf("loose.New: %v", err)
-	}
-
-	return store
-}
-
-func mustReadAllAndClose(t *testing.T, reader io.ReadCloser) []byte {
-	t.Helper()
-
-	data, err := io.ReadAll(reader)
-	if err != nil {
-		_ = reader.Close()
-
-		t.Fatalf("ReadAll: %v", err)
-	}
-
-	err = reader.Close()
-	if err != nil {
-		t.Fatalf("Close: %v", err)
-	}
-
-	return data
-}
-
-func expectedRawObject(t *testing.T, testRepo *testgit.TestRepo, id objectid.ObjectID) (objecttype.Type, []byte, []byte) {
-	t.Helper()
-
-	typeName := testRepo.Run(t, "cat-file", "-t", id.String())
-
-	ty, ok := objecttype.ParseName(typeName)
-	if !ok {
-		t.Fatalf("ParseName(%q) failed", typeName)
-	}
-
-	body := testRepo.CatFile(t, typeName, id)
-
-	header, ok := objectheader.Encode(ty, int64(len(body)))
-	if !ok {
-		t.Fatalf("objectheader.Encode failed")
-	}
-
-	raw := make([]byte, len(header)+len(body))
-	copy(raw, header)
-	copy(raw[len(header):], body)
-
-	return ty, body, raw
-}
-
-func corruptLooseObjectTrailer(t *testing.T, testRepo *testgit.TestRepo, id objectid.ObjectID) {
-	t.Helper()
-
-	root := testRepo.OpenObjectsRoot(t)
-
-	hex := id.String()
-	relPath := hex[:2] + "/" + hex[2:]
-
-	file, err := root.OpenFile(relPath, os.O_RDWR, 0)
-	if err != nil {
-		t.Fatalf("OpenFile(%q): %v", relPath, err)
-	}
-
-	defer func() { _ = file.Close() }()
-
-	info, err := file.Stat()
-	if err != nil {
-		t.Fatalf("Stat(%q): %v", relPath, err)
-	}
-
-	if info.Size() == 0 {
-		t.Fatalf("corrupt trailer on empty file %q", relPath)
-	}
-
-	last := make([]byte, 1)
-
-	_, err = file.ReadAt(last, info.Size()-1)
-	if err != nil {
-		t.Fatalf("ReadAt(%q): %v", relPath, err)
-	}
-
-	last[0] ^= 0xff
-
-	_, err = file.WriteAt(last, info.Size()-1)
-	if err != nil {
-		t.Fatalf("WriteAt(%q): %v", relPath, err)
-	}
-}
diff --git a/object/storer/loose/parse.go b/object/storer/loose/parse.go
deleted file mode 100644
index 789bd821..00000000
--- a/object/storer/loose/parse.go
+++ /dev/null
@@ -1,55 +0,0 @@
-package loose
-
-import (
-	"bufio"
-	"errors"
-	"io"
-	"os"
-
-	"codeberg.org/lindenii/furgit/internal/compress/zlib"
-	objectheader "codeberg.org/lindenii/furgit/object/header"
-	objecttype "codeberg.org/lindenii/furgit/object/type"
-)
-
-// decodeAll inflates the full loose object payload from file.
-func decodeAll(file *os.File) ([]byte, error) {
-	zr, err := zlib.NewReader(file)
-	if err != nil {
-		return nil, err
-	}
-
-	defer func() { _ = zr.Close() }()
-
-	return io.ReadAll(zr)
-}
-
-// parseRaw parses a loose object payload in "type size\0content" format.
-func parseRaw(raw []byte) (objecttype.Type, []byte, error) {
-	ty, size, headerLen, ok := objectheader.Parse(raw)
-	if !ok {
-		return objecttype.TypeInvalid, nil, errors.New("objectstorer/loose: malformed object header")
-	}
-
-	content := raw[headerLen:]
-	if int64(len(content)) != size {
-		return objecttype.TypeInvalid, nil, errors.New("objectstorer/loose: object header size/content mismatch")
-	}
-
-	return ty, content, nil
-}
-
-// readHeader reads and parses a loose object header from br, and returns
-// the raw header bytes including the trailing NUL.
-func readHeader(br *bufio.Reader) ([]byte, objecttype.Type, int64, error) {
-	header, err := br.ReadSlice(0)
-	if err != nil {
-		return nil, objecttype.TypeInvalid, 0, err
-	}
-
-	ty, size, _, ok := objectheader.Parse(header)
-	if !ok {
-		return nil, objecttype.TypeInvalid, 0, errors.New("objectstorer/loose: malformed object header")
-	}
-
-	return header, ty, size, nil
-}
diff --git a/object/storer/loose/paths.go b/object/storer/loose/paths.go
deleted file mode 100644
index 58ef6b8e..00000000
--- a/object/storer/loose/paths.go
+++ /dev/null
@@ -1,43 +0,0 @@
-package loose
-
-import (
-	"errors"
-	"fmt"
-	"io/fs"
-	"os"
-	"path/filepath"
-
-	objectid "codeberg.org/lindenii/furgit/object/id"
-	objectstorer "codeberg.org/lindenii/furgit/object/storer"
-)
-
-// objectPath returns the loose object path for id relative to the objects root.
-func (store *Store) objectPath(id objectid.ObjectID) (string, error) {
-	if id.Algorithm() != store.algo {
-		return "", fmt.Errorf("objectstorer/loose: object id algorithm mismatch: got %s want %s", id.Algorithm(), store.algo)
-	}
-
-	hex := id.String()
-
-	return filepath.Join(hex[:2], hex[2:]), nil
-}
-
-// openObject opens the loose object file for id.
-// Missing files cause objectstorer.ErrObjectNotFound.
-func (store *Store) openObject(id objectid.ObjectID) (*os.File, error) {
-	relPath, err := store.objectPath(id)
-	if err != nil {
-		return nil, err
-	}
-
-	file, err := store.root.Open(relPath)
-	if err != nil {
-		if errors.Is(err, fs.ErrNotExist) {
-			return nil, objectstorer.ErrObjectNotFound
-		}
-
-		return nil, err
-	}
-
-	return file, nil
-}
diff --git a/object/storer/loose/read_bytes.go b/object/storer/loose/read_bytes.go
deleted file mode 100644
index 0b6da81b..00000000
--- a/object/storer/loose/read_bytes.go
+++ /dev/null
@@ -1,49 +0,0 @@
-package loose
-
-import (
-	objectid "codeberg.org/lindenii/furgit/object/id"
-	objecttype "codeberg.org/lindenii/furgit/object/type"
-)
-
-// readBytesParsed reads, inflates, and parses a loose object in one pass.
-// It returns the full raw payload and its parsed type and content.
-func (store *Store) readBytesParsed(id objectid.ObjectID) ([]byte, objecttype.Type, []byte, error) {
-	file, err := store.openObject(id)
-	if err != nil {
-		return nil, objecttype.TypeInvalid, nil, err
-	}
-
-	defer func() { _ = file.Close() }()
-
-	raw, err := decodeAll(file)
-	if err != nil {
-		return nil, objecttype.TypeInvalid, nil, err
-	}
-
-	ty, content, err := parseRaw(raw)
-	if err != nil {
-		return nil, objecttype.TypeInvalid, nil, err
-	}
-
-	return raw, ty, content, nil
-}
-
-// ReadBytesFull reads a full serialized object as "type size\0content".
-func (store *Store) ReadBytesFull(id objectid.ObjectID) ([]byte, error) {
-	raw, _, _, err := store.readBytesParsed(id)
-	if err != nil {
-		return nil, err
-	}
-
-	return raw, nil
-}
-
-// ReadBytesContent reads an object's type and content bytes.
-func (store *Store) ReadBytesContent(id objectid.ObjectID) (objecttype.Type, []byte, error) {
-	_, ty, content, err := store.readBytesParsed(id)
-	if err != nil {
-		return objecttype.TypeInvalid, nil, err
-	}
-
-	return ty, content, nil
-}
diff --git a/object/storer/loose/read_header.go b/object/storer/loose/read_header.go
deleted file mode 100644
index 37bf40de..00000000
--- a/object/storer/loose/read_header.go
+++ /dev/null
@@ -1,37 +0,0 @@
-package loose
-
-import (
-	"bufio"
-
-	"codeberg.org/lindenii/furgit/internal/compress/zlib"
-	objectid "codeberg.org/lindenii/furgit/object/id"
-	objecttype "codeberg.org/lindenii/furgit/object/type"
-)
-
-// ReadHeader reads an object's type and declared content length.
-//
-// It parses only enough of the zlib-decoded object to recover the object
-// header. It does not verify that the remaining object content is readable and
-// does not verify the zlib Adler-32 trailer.
-func (store *Store) ReadHeader(id objectid.ObjectID) (objecttype.Type, int64, error) {
-	file, err := store.openObject(id)
-	if err != nil {
-		return objecttype.TypeInvalid, 0, err
-	}
-
-	defer func() { _ = file.Close() }()
-
-	zr, err := zlib.NewReader(file)
-	if err != nil {
-		return objecttype.TypeInvalid, 0, err
-	}
-
-	defer func() { _ = zr.Close() }()
-
-	_, ty, size, err := readHeader(bufio.NewReader(zr))
-	if err != nil {
-		return objecttype.TypeInvalid, 0, err
-	}
-
-	return ty, size, nil
-}
diff --git a/object/storer/loose/read_reader.go b/object/storer/loose/read_reader.go
deleted file mode 100644
index 29b71627..00000000
--- a/object/storer/loose/read_reader.go
+++ /dev/null
@@ -1,118 +0,0 @@
-package loose
-
-import (
-	"bufio"
-	"bytes"
-	"errors"
-	"io"
-	"os"
-
-	"codeberg.org/lindenii/furgit/internal/compress/zlib"
-	"codeberg.org/lindenii/furgit/internal/iolimit"
-	objectid "codeberg.org/lindenii/furgit/object/id"
-	objecttype "codeberg.org/lindenii/furgit/object/type"
-)
-
-type objectReader struct {
-	// reader is the stream exposed by Read.
-	reader io.Reader
-	// file is the underlying loose object file and is closed by Close.
-	file *os.File
-	// zr is the zlib decoder and is closed by Close.
-	zr io.ReadCloser
-}
-
-func (reader *objectReader) Read(dst []byte) (int, error) {
-	return reader.reader.Read(dst)
-}
-
-func (reader *objectReader) Close() error {
-	errZlib := reader.zr.Close()
-	errFile := reader.file.Close()
-
-	return errors.Join(errZlib, errFile)
-}
-
-// openInflated opens and zlib-decodes a loose object file.
-// The caller owns both returned closers and must close them.
-func (store *Store) openInflated(id objectid.ObjectID) (*os.File, io.ReadCloser, error) {
-	file, err := store.openObject(id)
-	if err != nil {
-		return nil, nil, err
-	}
-
-	zr, err := zlib.NewReader(file)
-	if err != nil {
-		_ = file.Close()
-
-		return nil, nil, err
-	}
-
-	return file, zr, nil
-}
-
-// ReadReaderFull reads a full serialized object stream as "type size\0content".
-//
-// The caller must close the returned reader.
-//
-// Close releases resources only. It does not drain unread data for additional
-// validation. In particular, malformed trailing compressed data, trailing bytes
-// past the declared object size, and the zlib Adler-32 trailer may go
-// unverified unless the caller reads to io.EOF.
-func (store *Store) ReadReaderFull(id objectid.ObjectID) (io.ReadCloser, error) {
-	file, zr, err := store.openInflated(id)
-	if err != nil {
-		return nil, err
-	}
-
-	br := bufio.NewReader(zr)
-
-	header, _, size, err := readHeader(br)
-	if err != nil {
-		_ = zr.Close()
-		_ = file.Close()
-
-		return nil, err
-	}
-
-	return &objectReader{
-		reader: io.MultiReader(
-			bytes.NewReader(header),
-			iolimit.ExpectLengthReader(br, size),
-		),
-		file: file,
-		zr:   zr,
-	}, nil
-}
-
-// ReadReaderContent reads an object's type, declared content length, and
-// content stream.
-//
-// The caller must close the returned reader.
-//
-// Close releases resources only. It does not drain unread data for additional
-// validation. In particular, malformed trailing compressed data, trailing bytes
-// past the declared object size, and the zlib Adler-32 trailer may go
-// unverified unless the caller reads to io.EOF.
-func (store *Store) ReadReaderContent(id objectid.ObjectID) (objecttype.Type, int64, io.ReadCloser, error) {
-	file, zr, err := store.openInflated(id)
-	if err != nil {
-		return objecttype.TypeInvalid, 0, nil, err
-	}
-
-	br := bufio.NewReader(zr)
-
-	_, ty, size, err := readHeader(br)
-	if err != nil {
-		_ = zr.Close()
-		_ = file.Close()
-
-		return objecttype.TypeInvalid, 0, nil, err
-	}
-
-	return ty, size, &objectReader{
-		reader: iolimit.ExpectLengthReader(br, size),
-		file:   file,
-		zr:     zr,
-	}, nil
-}
diff --git a/object/storer/loose/read_size.go b/object/storer/loose/read_size.go
deleted file mode 100644
index 2ececc49..00000000
--- a/object/storer/loose/read_size.go
+++ /dev/null
@@ -1,13 +0,0 @@
-package loose
-
-import objectid "codeberg.org/lindenii/furgit/object/id"
-
-// ReadSize reads an object's declared content length.
-//
-// Like ReadHeader, it parses only enough of the zlib-decoded object to recover
-// the header and does not verify the zlib Adler-32 trailer.
-func (store *Store) ReadSize(id objectid.ObjectID) (int64, error) {
-	_, size, err := store.ReadHeader(id)
-
-	return size, err
-}
diff --git a/object/storer/loose/read_test.go b/object/storer/loose/read_test.go
deleted file mode 100644
index d44ecea8..00000000
--- a/object/storer/loose/read_test.go
+++ /dev/null
@@ -1,212 +0,0 @@
-package loose_test
-
-import (
-	"bytes"
-	"errors"
-	"os"
-	"strings"
-	"testing"
-
-	"codeberg.org/lindenii/furgit/internal/testgit"
-	objectid "codeberg.org/lindenii/furgit/object/id"
-	objectstorer "codeberg.org/lindenii/furgit/object/storer"
-	"codeberg.org/lindenii/furgit/object/storer/loose"
-	objecttype "codeberg.org/lindenii/furgit/object/type"
-)
-
-func TestLooseStoreReadAgainstGit(t *testing.T) {
-	t.Parallel()
-	testgit.ForEachAlgorithm(t, func(t *testing.T, algo objectid.Algorithm) { //nolint:thelper
-		testRepo := testgit.NewRepo(t, testgit.RepoOptions{ObjectFormat: algo, Bare: true})
-		blobID := testRepo.HashObject(t, "blob", []byte("blob body\n"))
-		_, treeID, commitID := testRepo.MakeCommit(t, "subject\n\nbody")
-		tagID := testRepo.TagAnnotated(t, "v1", commitID, "tag message")
-
-		store := openLooseStore(t, testRepo, algo)
-
-		tests := []struct {
-			name string
-			id   objectid.ObjectID
-		}{
-			{name: "blob", id: blobID},
-			{name: "tree", id: treeID},
-			{name: "commit", id: commitID},
-			{name: "tag", id: tagID},
-		}
-
-		for _, tt := range tests {
-			t.Run(tt.name, func(t *testing.T) {
-				wantType, wantBody, wantRaw := expectedRawObject(t, testRepo, tt.id)
-
-				gotRaw, err := store.ReadBytesFull(tt.id)
-				if err != nil {
-					t.Fatalf("ReadBytesFull: %v", err)
-				}
-
-				if !bytes.Equal(gotRaw, wantRaw) {
-					t.Fatalf("ReadBytesFull mismatch")
-				}
-
-				gotType, gotBody, err := store.ReadBytesContent(tt.id)
-				if err != nil {
-					t.Fatalf("ReadBytesContent: %v", err)
-				}
-
-				if gotType != wantType {
-					t.Fatalf("ReadBytesContent type = %v, want %v", gotType, wantType)
-				}
-
-				if !bytes.Equal(gotBody, wantBody) {
-					t.Fatalf("ReadBytesContent body mismatch")
-				}
-
-				headType, headSize, err := store.ReadHeader(tt.id)
-				if err != nil {
-					t.Fatalf("ReadHeader: %v", err)
-				}
-
-				if headType != wantType {
-					t.Fatalf("ReadHeader type = %v, want %v", headType, wantType)
-				}
-
-				if headSize != int64(len(wantBody)) {
-					t.Fatalf("ReadHeader size = %d, want %d", headSize, len(wantBody))
-				}
-
-				fullReader, err := store.ReadReaderFull(tt.id)
-				if err != nil {
-					t.Fatalf("ReadReaderFull: %v", err)
-				}
-
-				got := mustReadAllAndClose(t, fullReader)
-				if !bytes.Equal(got, wantRaw) {
-					t.Fatalf("ReadReaderFull stream mismatch")
-				}
-
-				contentType, contentSize, contentReader, err := store.ReadReaderContent(tt.id)
-				if err != nil {
-					t.Fatalf("ReadReaderContent: %v", err)
-				}
-
-				if contentType != wantType {
-					t.Fatalf("ReadReaderContent type = %v, want %v", contentType, wantType)
-				}
-
-				if contentSize != int64(len(wantBody)) {
-					t.Fatalf("ReadReaderContent size = %d, want %d", contentSize, len(wantBody))
-				}
-
-				got = mustReadAllAndClose(t, contentReader)
-				if !bytes.Equal(got, wantBody) {
-					t.Fatalf("ReadReaderContent stream mismatch")
-				}
-			})
-		}
-	})
-}
-
-func TestLooseStoreErrors(t *testing.T) {
-	t.Parallel()
-	testgit.ForEachAlgorithm(t, func(t *testing.T, algo objectid.Algorithm) { //nolint:thelper
-		testRepo := testgit.NewRepo(t, testgit.RepoOptions{ObjectFormat: algo, Bare: true})
-		store := openLooseStore(t, testRepo, algo)
-
-		notFoundID, err := objectid.ParseHex(algo, strings.Repeat("0", algo.HexLen()))
-		if err != nil {
-			t.Fatalf("ParseHex(notFoundID): %v", err)
-		}
-
-		_, err = store.ReadBytesFull(notFoundID)
-		if !errors.Is(err, objectstorer.ErrObjectNotFound) {
-			t.Fatalf("ReadBytesFull not-found error = %v", err)
-		}
-
-		_, _, err = store.ReadBytesContent(notFoundID)
-		if !errors.Is(err, objectstorer.ErrObjectNotFound) {
-			t.Fatalf("ReadBytesContent not-found error = %v", err)
-		}
-
-		_, err = store.ReadReaderFull(notFoundID)
-		if !errors.Is(err, objectstorer.ErrObjectNotFound) {
-			t.Fatalf("ReadReaderFull not-found error = %v", err)
-		}
-
-		_, _, _, err = store.ReadReaderContent(notFoundID)
-		if !errors.Is(err, objectstorer.ErrObjectNotFound) {
-			t.Fatalf("ReadReaderContent not-found error = %v", err)
-		}
-
-		_, _, err = store.ReadHeader(notFoundID)
-		if !errors.Is(err, objectstorer.ErrObjectNotFound) {
-			t.Fatalf("ReadHeader not-found error = %v", err)
-		}
-
-		var otherAlgo objectid.Algorithm
-		if algo == objectid.AlgorithmSHA1 {
-			otherAlgo = objectid.AlgorithmSHA256
-		} else {
-			otherAlgo = objectid.AlgorithmSHA1
-		}
-
-		otherID, err := objectid.ParseHex(otherAlgo, strings.Repeat("1", otherAlgo.HexLen()))
-		if err != nil {
-			t.Fatalf("ParseHex(otherID): %v", err)
-		}
-
-		_, err = store.ReadBytesFull(otherID)
-		if err == nil || !strings.Contains(err.Error(), "algorithm mismatch") {
-			t.Fatalf("ReadBytesFull algorithm-mismatch error = %v", err)
-		}
-	})
-}
-
-func TestLooseStoreNewValidation(t *testing.T) {
-	t.Parallel()
-
-	root, err := os.OpenRoot(t.TempDir())
-	if err != nil {
-		t.Fatalf("OpenRoot: %v", err)
-	}
-
-	defer func() { _ = root.Close() }()
-
-	_, err = loose.New(root, objectid.AlgorithmUnknown)
-	if err == nil {
-		t.Fatalf("loose.New(root, unknown) expected error")
-	}
-}
-
-func TestLooseStoreReadHeaderDoesNotVerifyAdler32(t *testing.T) {
-	t.Parallel()
-	testgit.ForEachAlgorithm(t, func(t *testing.T, algo objectid.Algorithm) { //nolint:thelper
-		testRepo := testgit.NewRepo(t, testgit.RepoOptions{ObjectFormat: algo, Bare: true})
-		store := openLooseStore(t, testRepo, algo)
-
-		content := []byte("header-only-check\n")
-
-		id, err := store.WriteBytesContent(objecttype.TypeBlob, content)
-		if err != nil {
-			t.Fatalf("WriteBytesContent: %v", err)
-		}
-
-		corruptLooseObjectTrailer(t, testRepo, id)
-
-		ty, size, err := store.ReadHeader(id)
-		if err != nil {
-			t.Fatalf("ReadHeader: %v", err)
-		}
-
-		if ty != objecttype.TypeBlob {
-			t.Fatalf("ReadHeader type = %v, want %v", ty, objecttype.TypeBlob)
-		}
-
-		if size != int64(len(content)) {
-			t.Fatalf("ReadHeader size = %d, want %d", size, len(content))
-		}
-
-		_, err = store.ReadBytesFull(id)
-		if err == nil {
-			t.Fatalf("ReadBytesFull on corrupted trailer succeeded")
-		}
-	})
-}
diff --git a/object/storer/loose/refresh.go b/object/storer/loose/refresh.go
deleted file mode 100644
index b720ebc6..00000000
--- a/object/storer/loose/refresh.go
+++ /dev/null
@@ -1,6 +0,0 @@
-package loose
-
-// Refresh is a no-op for loose object stores.
-func (store *Store) Refresh() error {
-	return nil
-}
diff --git a/object/storer/loose/store.go b/object/storer/loose/store.go
deleted file mode 100644
index d8eba84e..00000000
--- a/object/storer/loose/store.go
+++ /dev/null
@@ -1,41 +0,0 @@
-// Package loose provides a loose object backend (objects/XX/YYYYY..).
-package loose
-
-import (
-	"os"
-
-	objectid "codeberg.org/lindenii/furgit/object/id"
-)
-
-// Store reads loose Git objects from an objects directory root.
-//
-// Loose objects are zlib streams whose trailer uses Adler-32. Which reads
-// consume enough of the stream to reach and verify that trailer is documented
-// on the individual methods.
-type Store struct {
-	// root is the objects directory capability used for all object file access.
-	// Object files are opened by relative paths like "<first2>/<rest>".
-	// Store borrows this root.
-	root *os.Root
-	// algo is the expected object ID algorithm for lookups.
-	algo objectid.Algorithm
-}
-
-// New creates a loose-object store rooted at an objects directory for algo.
-func New(root *os.Root, algo objectid.Algorithm) (*Store, error) {
-	if algo.Size() == 0 {
-		return nil, objectid.ErrInvalidAlgorithm
-	}
-
-	return &Store{
-		root: root,
-		algo: algo,
-	}, nil
-}
-
-// Close releases resources associated with the backend.
-//
-// Store borrows its root, so Close does not close it.
-//
-// Repeated calls to Close are undefined behavior.
-func (store *Store) Close() error { return nil }
diff --git a/object/storer/loose/write_bytes.go b/object/storer/loose/write_bytes.go
deleted file mode 100644
index ffc65117..00000000
--- a/object/storer/loose/write_bytes.go
+++ /dev/null
@@ -1,18 +0,0 @@
-package loose
-
-import (
-	"bytes"
-
-	objectid "codeberg.org/lindenii/furgit/object/id"
-	objecttype "codeberg.org/lindenii/furgit/object/type"
-)
-
-// WriteBytesFull writes a full serialized object as "type size\0content".
-func (store *Store) WriteBytesFull(raw []byte) (objectid.ObjectID, error) {
-	return store.WriteReaderFull(bytes.NewReader(raw))
-}
-
-// WriteBytesContent writes typed content bytes as a loose object.
-func (store *Store) WriteBytesContent(ty objecttype.Type, content []byte) (objectid.ObjectID, error) {
-	return store.WriteReaderContent(ty, int64(len(content)), bytes.NewReader(content))
-}
diff --git a/object/storer/loose/write_reader.go b/object/storer/loose/write_reader.go
deleted file mode 100644
index 42d01ad8..00000000
--- a/object/storer/loose/write_reader.go
+++ /dev/null
@@ -1,81 +0,0 @@
-package loose
-
-import (
-	"fmt"
-	"io"
-
-	objectheader "codeberg.org/lindenii/furgit/object/header"
-	objectid "codeberg.org/lindenii/furgit/object/id"
-	objecttype "codeberg.org/lindenii/furgit/object/type"
-)
-
-// WriteReaderContent writes one loose object from typed content bytes read from src.
-// src must provide exactly size bytes.
-// size is required because loose object headers are "type size\0content", so the
-// header must be emitted before streaming content without buffering.
-func (store *Store) WriteReaderContent(ty objecttype.Type, size int64, src io.Reader) (objectid.ObjectID, error) {
-	if size < 0 {
-		return objectid.ObjectID{}, fmt.Errorf("objectstorer/loose: negative content size: %d", size)
-	}
-
-	header, ok := objectheader.Encode(ty, size)
-	if !ok {
-		return objectid.ObjectID{}, fmt.Errorf("objectstorer/loose: failed to encode object header for type %v", ty)
-	}
-
-	writer, err := store.newStreamWriter(false)
-	if err != nil {
-		return objectid.ObjectID{}, err
-	}
-
-	writer.headerDone = true
-	writer.expectedContentLeft = size
-
-	err = writer.writeRawChunk(header)
-	if err != nil {
-		_ = writer.Close()
-		_ = store.root.Remove(writer.tmpRelPath)
-
-		return objectid.ObjectID{}, err
-	}
-
-	return writeReaderIntoStreamWriter(writer, src)
-}
-
-// WriteReaderFull writes one loose object from raw bytes "type size\0content"
-// read from src.
-func (store *Store) WriteReaderFull(src io.Reader) (objectid.ObjectID, error) {
-	writer, err := store.newStreamWriter(true)
-	if err != nil {
-		return objectid.ObjectID{}, err
-	}
-
-	return writeReaderIntoStreamWriter(writer, src)
-}
-
-// writeReaderIntoStreamWriter copies src into writer and publishes the object.
-func writeReaderIntoStreamWriter(writer *streamWriter, src io.Reader) (objectid.ObjectID, error) {
-	_, err := io.Copy(writer, src)
-	if err != nil {
-		_ = writer.Close()
-		_ = writer.store.root.Remove(writer.tmpRelPath)
-
-		return objectid.ObjectID{}, err
-	}
-
-	err = writer.Close()
-	if err != nil {
-		_ = writer.store.root.Remove(writer.tmpRelPath)
-
-		return objectid.ObjectID{}, err
-	}
-
-	id, err := writer.finalize()
-	if err != nil {
-		_ = writer.store.root.Remove(writer.tmpRelPath)
-
-		return objectid.ObjectID{}, err
-	}
-
-	return id, nil
-}
diff --git a/object/storer/loose/write_temp_object_file.go b/object/storer/loose/write_temp_object_file.go
deleted file mode 100644
index 4e7e6942..00000000
--- a/object/storer/loose/write_temp_object_file.go
+++ /dev/null
@@ -1,30 +0,0 @@
-package loose
-
-import (
-	"crypto/rand"
-	"errors"
-	"io/fs"
-	"os"
-	"path/filepath"
-)
-
-// createTempObjectFile creates a unique temporary object file within dir.
-// The returned path is relative to the objects root.
-func (store *Store) createTempObjectFile(dir string) (string, *os.File, error) {
-	for range 16 {
-		relPath := filepath.Join(dir, tempObjectFilePrefix+rand.Text())
-
-		file, err := store.root.OpenFile(relPath, os.O_CREATE|os.O_EXCL|os.O_WRONLY, 0o644)
-		if err == nil {
-			return relPath, file, nil
-		}
-
-		if errors.Is(err, fs.ErrExist) {
-			continue
-		}
-
-		return "", nil, err
-	}
-
-	return "", nil, errors.New("objectstorer/loose: failed to create temporary object file")
-}
diff --git a/object/storer/loose/write_test.go b/object/storer/loose/write_test.go
deleted file mode 100644
index 30d8dbdb..00000000
--- a/object/storer/loose/write_test.go
+++ /dev/null
@@ -1,137 +0,0 @@
-package loose_test
-
-import (
-	"bytes"
-	"testing"
-
-	"codeberg.org/lindenii/furgit/internal/testgit"
-	objectheader "codeberg.org/lindenii/furgit/object/header"
-	objectid "codeberg.org/lindenii/furgit/object/id"
-	objecttype "codeberg.org/lindenii/furgit/object/type"
-)
-
-func TestLooseStoreWriteReaderContentAgainstGit(t *testing.T) {
-	t.Parallel()
-	testgit.ForEachAlgorithm(t, func(t *testing.T, algo objectid.Algorithm) { //nolint:thelper
-		testRepo := testgit.NewRepo(t, testgit.RepoOptions{ObjectFormat: algo, Bare: true})
-		store := openLooseStore(t, testRepo, algo)
-
-		content := []byte("written-by-content-reader\n")
-		expectedHex := testRepo.RunInput(t, content, "hash-object", "-t", "blob", "--stdin")
-
-		expectedID, err := objectid.ParseHex(algo, expectedHex)
-		if err != nil {
-			t.Fatalf("ParseHex(expected): %v", err)
-		}
-
-		writtenID, err := store.WriteReaderContent(objecttype.TypeBlob, int64(len(content)), bytes.NewReader(content))
-		if err != nil {
-			t.Fatalf("WriteReaderContent: %v", err)
-		}
-
-		if writtenID != expectedID {
-			t.Fatalf("WriteReaderContent id = %s, want %s", writtenID, expectedID)
-		}
-
-		gotBody := testRepo.CatFile(t, "blob", writtenID)
-		if !bytes.Equal(gotBody, content) {
-			t.Fatalf("git cat-file body mismatch")
-		}
-
-		// Writing the same object again should succeed and return the same ID.
-		writtenID2, err := store.WriteReaderContent(objecttype.TypeBlob, int64(len(content)), bytes.NewReader(content))
-		if err != nil {
-			t.Fatalf("WriteReaderContent second: %v", err)
-		}
-
-		if writtenID2 != expectedID {
-			t.Fatalf("WriteReaderContent second id = %s, want %s", writtenID2, expectedID)
-		}
-	})
-}
-
-func TestLooseStoreWriteReaderFullAgainstGit(t *testing.T) {
-	t.Parallel()
-	testgit.ForEachAlgorithm(t, func(t *testing.T, algo objectid.Algorithm) { //nolint:thelper
-		testRepo := testgit.NewRepo(t, testgit.RepoOptions{ObjectFormat: algo, Bare: true})
-		store := openLooseStore(t, testRepo, algo)
-
-		body := []byte("full-reader-body\n")
-
-		header, ok := objectheader.Encode(objecttype.TypeBlob, int64(len(body)))
-		if !ok {
-			t.Fatalf("objectheader.Encode failed")
-		}
-
-		raw := make([]byte, len(header)+len(body))
-		copy(raw, header)
-		copy(raw[len(header):], body)
-
-		wantID := algo.Sum(raw)
-
-		gotID, err := store.WriteReaderFull(bytes.NewReader(raw))
-		if err != nil {
-			t.Fatalf("WriteReaderFull: %v", err)
-		}
-
-		if gotID != wantID {
-			t.Fatalf("WriteReaderFull id = %s, want %s", gotID, wantID)
-		}
-
-		gotBody := testRepo.CatFile(t, "blob", gotID)
-		if !bytes.Equal(gotBody, body) {
-			t.Fatalf("git cat-file body mismatch")
-		}
-	})
-}
-
-func TestLooseStoreReaderValidationErrors(t *testing.T) {
-	t.Parallel()
-	testgit.ForEachAlgorithm(t, func(t *testing.T, algo objectid.Algorithm) { //nolint:thelper
-		t.Run("content overflow", func(t *testing.T) {
-			t.Parallel()
-			testRepo := testgit.NewRepo(t, testgit.RepoOptions{ObjectFormat: algo, Bare: true})
-			store := openLooseStore(t, testRepo, algo)
-
-			_, err := store.WriteReaderContent(objecttype.TypeBlob, 1, bytes.NewReader([]byte("hello")))
-			if err == nil {
-				t.Fatalf("expected error after overflow")
-			}
-		})
-
-		t.Run("content short", func(t *testing.T) {
-			t.Parallel()
-			testRepo := testgit.NewRepo(t, testgit.RepoOptions{ObjectFormat: algo, Bare: true})
-			store := openLooseStore(t, testRepo, algo)
-
-			_, err := store.WriteReaderContent(objecttype.TypeBlob, 5, bytes.NewReader([]byte("x")))
-			if err == nil {
-				t.Fatalf("expected error for short content")
-			}
-		})
-
-		t.Run("full malformed header", func(t *testing.T) {
-			t.Parallel()
-			testRepo := testgit.NewRepo(t, testgit.RepoOptions{ObjectFormat: algo, Bare: true})
-			store := openLooseStore(t, testRepo, algo)
-
-			_, err := store.WriteReaderFull(bytes.NewReader([]byte("not-a-header")))
-			if err == nil {
-				t.Fatalf("expected error for malformed header")
-			}
-		})
-
-		t.Run("full size mismatch", func(t *testing.T) {
-			t.Parallel()
-			testRepo := testgit.NewRepo(t, testgit.RepoOptions{ObjectFormat: algo, Bare: true})
-			store := openLooseStore(t, testRepo, algo)
-
-			raw := []byte("blob 1\x00hello")
-
-			_, err := store.WriteReaderFull(bytes.NewReader(raw))
-			if err == nil {
-				t.Fatalf("expected error after mismatch")
-			}
-		})
-	})
-}
diff --git a/object/storer/loose/write_writer.go b/object/storer/loose/write_writer.go
deleted file mode 100644
index 9d6187c7..00000000
--- a/object/storer/loose/write_writer.go
+++ /dev/null
@@ -1,94 +0,0 @@
-package loose
-
-import (
-	"errors"
-	"hash"
-	"os"
-
-	"codeberg.org/lindenii/furgit/internal/compress/zlib"
-)
-
-const tempObjectFilePrefix = "tmp_obj_"
-
-// streamWriter incrementally hashes and deflates an object into a temp file.
-// Finalize validates size accounting and atomically renames the temp file.
-type streamWriter struct {
-	// store owns path and root operations used by this write session.
-	store *Store
-	// file is the temporary destination file under objects/.
-	file *os.File
-	// zw compresses raw object bytes into file.
-	zw *zlib.Writer
-	// hash receives the same raw bytes used to compute the resulting object ID.
-	hash hash.Hash
-
-	// tmpRelPath is the relative path of file under the objects root.
-	tmpRelPath string
-
-	// fullMode selects full-object input ("type size\0content") as opposed to content-only input.
-	fullMode bool
-
-	// headerBuf accumulates header bytes while fullMode parses up to the first NUL.
-	headerBuf []byte
-	// headerDone reports whether the full-object header has been parsed.
-	headerDone bool
-	// expectedContentLeft tracks remaining declared content bytes.
-	expectedContentLeft int64
-
-	closed    bool
-	finalized bool
-}
-
-// newStreamWriter creates a stream writer with a temp file rooted in objects/.
-func (store *Store) newStreamWriter(fullMode bool) (*streamWriter, error) {
-	hashFn, err := store.algo.New()
-	if err != nil {
-		return nil, err
-	}
-
-	tmpRelPath, file, err := store.createTempObjectFile(".")
-	if err != nil {
-		return nil, err
-	}
-
-	return &streamWriter{
-		store:      store,
-		file:       file,
-		zw:         zlib.NewWriter(file),
-		hash:       hashFn,
-		tmpRelPath: tmpRelPath,
-		fullMode:   fullMode,
-		headerBuf:  make([]byte, 0, 64),
-	}, nil
-}
-
-// Write validates and writes raw bytes into the stream.
-// In full mode, it parses and enforces the streamed header-declared content size.
-func (writer *streamWriter) Write(src []byte) (int, error) {
-	if writer.finalized {
-		return 0, errors.New("objectstorer/loose: write after finalize")
-	}
-
-	if writer.closed {
-		return 0, errors.New("objectstorer/loose: write after close")
-	}
-
-	if writer.fullMode {
-		err := writer.acceptFull(src)
-		if err != nil {
-			return 0, err
-		}
-	} else {
-		err := writer.acceptContent(int64(len(src)))
-		if err != nil {
-			return 0, err
-		}
-	}
-
-	err := writer.writeRawChunk(src)
-	if err != nil {
-		return 0, err
-	}
-
-	return len(src), nil
-}
diff --git a/object/storer/loose/write_writer_accept.go b/object/storer/loose/write_writer_accept.go
deleted file mode 100644
index bd3a8566..00000000
--- a/object/storer/loose/write_writer_accept.go
+++ /dev/null
@@ -1,61 +0,0 @@
-package loose
-
-import (
-	"bytes"
-	"errors"
-
-	objectheader "codeberg.org/lindenii/furgit/object/header"
-)
-
-// acceptFull validates and accounts raw full-object input.
-func (writer *streamWriter) acceptFull(src []byte) error {
-	if !writer.headerDone {
-		nul := bytes.IndexByte(src, 0)
-		if nul >= 0 {
-			headerChunkLen := nul + 1
-			writer.headerBuf = append(writer.headerBuf, src[:headerChunkLen]...)
-
-			_, size, _, ok := objectheader.Parse(writer.headerBuf)
-			if !ok {
-				return errors.New("objectstorer/loose: malformed object header")
-			}
-
-			writer.headerDone = true
-			writer.expectedContentLeft = size
-
-			return writer.acceptContent(int64(len(src) - headerChunkLen))
-		}
-
-		writer.headerBuf = append(writer.headerBuf, src...)
-
-		return nil
-	}
-
-	return writer.acceptContent(int64(len(src)))
-}
-
-// acceptContent validates and accounts content byte counts.
-func (writer *streamWriter) acceptContent(n int64) error {
-	if n > writer.expectedContentLeft {
-		return errors.New("objectstorer/loose: object content exceeds declared size")
-	}
-
-	writer.expectedContentLeft -= n
-
-	return nil
-}
-
-// writeRawChunk forwards raw bytes to the hash and deflate pipeline.
-func (writer *streamWriter) writeRawChunk(src []byte) error {
-	_, err := writer.hash.Write(src)
-	if err != nil {
-		return err
-	}
-
-	_, err = writer.zw.Write(src)
-	if err != nil {
-		return err
-	}
-
-	return nil
-}
diff --git a/object/storer/loose/write_writer_finalize.go b/object/storer/loose/write_writer_finalize.go
deleted file mode 100644
index e38f301a..00000000
--- a/object/storer/loose/write_writer_finalize.go
+++ /dev/null
@@ -1,90 +0,0 @@
-package loose
-
-import (
-	"errors"
-	"io/fs"
-	"path/filepath"
-
-	objectid "codeberg.org/lindenii/furgit/object/id"
-)
-
-// Close flushes and closes the underlying zlib stream and temp file.
-//
-// Repeated calls to Close are undefined behavior.
-func (writer *streamWriter) Close() error {
-	errZlib := writer.zw.Close()
-	errSync := writer.file.Sync()
-	errFile := writer.file.Close()
-
-	writer.closed = true
-	writer.file = nil
-
-	return errors.Join(errZlib, errSync, errFile)
-}
-
-// finalize validates write completeness and atomically publishes the object.
-// Publication is no-clobber: it links tmpRelPath to the object path and treats
-// existing destination objects as success.
-func (writer *streamWriter) finalize() (objectid.ObjectID, error) {
-	writer.finalized = true
-
-	var zero objectid.ObjectID
-
-	if !writer.closed {
-		err := writer.Close()
-		if err != nil {
-			return zero, err
-		}
-	}
-
-	if writer.fullMode && !writer.headerDone {
-		return zero, errors.New("objectstorer/loose: missing full object header")
-	}
-
-	if writer.expectedContentLeft != 0 {
-		return zero, errors.New("objectstorer/loose: object content shorter than declared size")
-	}
-
-	idBytes := writer.hash.Sum(nil)
-
-	id, err := objectid.FromBytes(writer.store.algo, idBytes)
-	if err != nil {
-		return zero, err
-	}
-
-	relPath, err := writer.store.objectPath(id)
-	if err != nil {
-		return zero, err
-	}
-
-	dir := filepath.Dir(relPath)
-
-	err = writer.store.root.MkdirAll(dir, 0o755)
-	if err != nil {
-		return zero, err
-	}
-
-	cleanup := true
-
-	defer func() {
-		if cleanup {
-			_ = writer.store.root.Remove(writer.tmpRelPath)
-		}
-	}()
-
-	err = writer.store.root.Link(writer.tmpRelPath, relPath)
-	if err != nil {
-		if errors.Is(err, fs.ErrExist) {
-			cleanup = false
-			_ = writer.store.root.Remove(writer.tmpRelPath)
-
-			return id, nil
-		}
-
-		return zero, err
-	}
-
-	cleanup = false
-
-	return id, nil
-}
diff --git a/object/storer/memory/add.go b/object/storer/memory/add.go
deleted file mode 100644
index 3b27f52d..00000000
--- a/object/storer/memory/add.go
+++ /dev/null
@@ -1,21 +0,0 @@
-package memory
-
-import (
-	objectheader "codeberg.org/lindenii/furgit/object/header"
-	objectid "codeberg.org/lindenii/furgit/object/id"
-	objecttype "codeberg.org/lindenii/furgit/object/type"
-)
-
-// AddObject stores one object body and returns its object ID.
-func (store *Store) AddObject(ty objecttype.Type, body []byte) objectid.ObjectID {
-	header, ok := objectheader.Encode(ty, int64(len(body)))
-	if !ok {
-		panic("failed to encode object header")
-	}
-
-	raw := append(append([]byte(nil), header...), body...)
-	id := store.algo.Sum(raw)
-	store.objects[id] = storedObject{ty: ty, content: append([]byte(nil), body...)}
-
-	return id
-}
diff --git a/object/storer/memory/algorithm.go b/object/storer/memory/algorithm.go
deleted file mode 100644
index bf7f3a82..00000000
--- a/object/storer/memory/algorithm.go
+++ /dev/null
@@ -1,8 +0,0 @@
-package memory
-
-import objectid "codeberg.org/lindenii/furgit/object/id"
-
-// Algorithm returns the object ID algorithm used by the store.
-func (store *Store) Algorithm() objectid.Algorithm {
-	return store.algo
-}
diff --git a/object/storer/memory/doc.go b/object/storer/memory/doc.go
deleted file mode 100644
index cb40d466..00000000
--- a/object/storer/memory/doc.go
+++ /dev/null
@@ -1,2 +0,0 @@
-// Package memory provides one in-memory object store.
-package memory
diff --git a/object/storer/memory/object.go b/object/storer/memory/object.go
deleted file mode 100644
index a85175c7..00000000
--- a/object/storer/memory/object.go
+++ /dev/null
@@ -1,9 +0,0 @@
-package memory
-
-import objecttype "codeberg.org/lindenii/furgit/object/type"
-
-// storedObject is one in-memory object entry.
-type storedObject struct {
-	ty      objecttype.Type
-	content []byte
-}
diff --git a/object/storer/memory/read_bytes.go b/object/storer/memory/read_bytes.go
deleted file mode 100644
index e8b437ea..00000000
--- a/object/storer/memory/read_bytes.go
+++ /dev/null
@@ -1,37 +0,0 @@
-package memory
-
-import (
-	objectheader "codeberg.org/lindenii/furgit/object/header"
-	objectid "codeberg.org/lindenii/furgit/object/id"
-	objectstorer "codeberg.org/lindenii/furgit/object/storer"
-	objecttype "codeberg.org/lindenii/furgit/object/type"
-)
-
-// ReadBytesFull reads one full object, including the object header.
-func (store *Store) ReadBytesFull(id objectid.ObjectID) ([]byte, error) {
-	obj, ok := store.objects[id]
-	if !ok {
-		return nil, objectstorer.ErrObjectNotFound
-	}
-
-	header, ok := objectheader.Encode(obj.ty, int64(len(obj.content)))
-	if !ok {
-		panic("failed to encode object header")
-	}
-
-	raw := make([]byte, len(header)+len(obj.content))
-	copy(raw, header)
-	copy(raw[len(header):], obj.content)
-
-	return raw, nil
-}
-
-// ReadBytesContent reads one object body.
-func (store *Store) ReadBytesContent(id objectid.ObjectID) (objecttype.Type, []byte, error) {
-	obj, ok := store.objects[id]
-	if !ok {
-		return objecttype.TypeInvalid, nil, objectstorer.ErrObjectNotFound
-	}
-
-	return obj.ty, append([]byte(nil), obj.content...), nil
-}
diff --git a/object/storer/memory/read_header.go b/object/storer/memory/read_header.go
deleted file mode 100644
index 73cc4561..00000000
--- a/object/storer/memory/read_header.go
+++ /dev/null
@@ -1,17 +0,0 @@
-package memory
-
-import (
-	objectid "codeberg.org/lindenii/furgit/object/id"
-	objectstorer "codeberg.org/lindenii/furgit/object/storer"
-	objecttype "codeberg.org/lindenii/furgit/object/type"
-)
-
-// ReadHeader reads one object header.
-func (store *Store) ReadHeader(id objectid.ObjectID) (objecttype.Type, int64, error) {
-	obj, ok := store.objects[id]
-	if !ok {
-		return objecttype.TypeInvalid, 0, objectstorer.ErrObjectNotFound
-	}
-
-	return obj.ty, int64(len(obj.content)), nil
-}
diff --git a/object/storer/memory/read_reader.go b/object/storer/memory/read_reader.go
deleted file mode 100644
index 425c3034..00000000
--- a/object/storer/memory/read_reader.go
+++ /dev/null
@@ -1,29 +0,0 @@
-package memory
-
-import (
-	"bytes"
-	"io"
-
-	objectid "codeberg.org/lindenii/furgit/object/id"
-	objecttype "codeberg.org/lindenii/furgit/object/type"
-)
-
-// ReadReaderFull reads one full object through a reader.
-func (store *Store) ReadReaderFull(id objectid.ObjectID) (io.ReadCloser, error) {
-	raw, err := store.ReadBytesFull(id)
-	if err != nil {
-		return nil, err
-	}
-
-	return io.NopCloser(bytes.NewReader(raw)), nil
-}
-
-// ReadReaderContent reads one object body through a reader.
-func (store *Store) ReadReaderContent(id objectid.ObjectID) (objecttype.Type, int64, io.ReadCloser, error) {
-	ty, content, err := store.ReadBytesContent(id)
-	if err != nil {
-		return objecttype.TypeInvalid, 0, nil, err
-	}
-
-	return ty, int64(len(content)), io.NopCloser(bytes.NewReader(content)), nil
-}
diff --git a/object/storer/memory/read_size.go b/object/storer/memory/read_size.go
deleted file mode 100644
index 7045bd61..00000000
--- a/object/storer/memory/read_size.go
+++ /dev/null
@@ -1,13 +0,0 @@
-package memory
-
-import objectid "codeberg.org/lindenii/furgit/object/id"
-
-// ReadSize reads one object size.
-func (store *Store) ReadSize(id objectid.ObjectID) (int64, error) {
-	_, size, err := store.ReadHeader(id)
-	if err != nil {
-		return 0, err
-	}
-
-	return size, nil
-}
diff --git a/object/storer/memory/refresh.go b/object/storer/memory/refresh.go
deleted file mode 100644
index 1e18eef3..00000000
--- a/object/storer/memory/refresh.go
+++ /dev/null
@@ -1,6 +0,0 @@
-package memory
-
-// Refresh is a no-op for in-memory object stores.
-func (store *Store) Refresh() error {
-	return nil
-}
diff --git a/object/storer/memory/store.go b/object/storer/memory/store.go
deleted file mode 100644
index 8f212c38..00000000
--- a/object/storer/memory/store.go
+++ /dev/null
@@ -1,24 +0,0 @@
-package memory
-
-import (
-	objectid "codeberg.org/lindenii/furgit/object/id"
-)
-
-// Store is one in-memory object store.
-type Store struct {
-	algo    objectid.Algorithm
-	objects map[objectid.ObjectID]storedObject
-}
-
-// New builds one empty in-memory store for one object format.
-func New(algo objectid.Algorithm) *Store {
-	return &Store{
-		algo:    algo,
-		objects: make(map[objectid.ObjectID]storedObject),
-	}
-}
-
-// Close closes the in-memory store.
-func (store *Store) Close() error {
-	return nil
-}
diff --git a/object/storer/mix/bytes.go b/object/storer/mix/bytes.go
deleted file mode 100644
index a281c332..00000000
--- a/object/storer/mix/bytes.go
+++ /dev/null
@@ -1,51 +0,0 @@
-package mix
-
-import (
-	"errors"
-	"fmt"
-
-	objectid "codeberg.org/lindenii/furgit/object/id"
-	objectstorer "codeberg.org/lindenii/furgit/object/storer"
-	objecttype "codeberg.org/lindenii/furgit/object/type"
-)
-
-// ReadBytesFull reads a full serialized object from one backend that has it.
-func (mix *Mix) ReadBytesFull(id objectid.ObjectID) ([]byte, error) {
-	for i, backend := 0, mix.firstBackend(); backend != nil; i, backend = i+1, mix.nextBackend(backend) {
-		full, err := backend.ReadBytesFull(id)
-		if err == nil {
-			mix.touchBackend(backend)
-
-			return full, nil
-		}
-
-		if errors.Is(err, objectstorer.ErrObjectNotFound) {
-			continue
-		}
-
-		return nil, fmt.Errorf("objectstorer: backend %d read bytes full: %w", i, err)
-	}
-
-	return nil, objectstorer.ErrObjectNotFound
-}
-
-// ReadBytesContent reads an object's type and content bytes from one backend
-// that has it.
-func (mix *Mix) ReadBytesContent(id objectid.ObjectID) (objecttype.Type, []byte, error) {
-	for i, backend := 0, mix.firstBackend(); backend != nil; i, backend = i+1, mix.nextBackend(backend) {
-		ty, content, err := backend.ReadBytesContent(id)
-		if err == nil {
-			mix.touchBackend(backend)
-
-			return ty, content, nil
-		}
-
-		if errors.Is(err, objectstorer.ErrObjectNotFound) {
-			continue
-		}
-
-		return objecttype.TypeInvalid, nil, fmt.Errorf("objectstorer: backend %d read bytes content: %w", i, err)
-	}
-
-	return objecttype.TypeInvalid, nil, objectstorer.ErrObjectNotFound
-}
diff --git a/object/storer/mix/close.go b/object/storer/mix/close.go
deleted file mode 100644
index 53f6cd30..00000000
--- a/object/storer/mix/close.go
+++ /dev/null
@@ -1,8 +0,0 @@
-package mix
-
-// Close releases wrapper-local resources.
-//
-// Mix borrows its backends, so Close does not close them.
-//
-// Repeated calls to Close are undefined behavior.
-func (mix *Mix) Close() error { return nil }
diff --git a/object/storer/mix/header.go b/object/storer/mix/header.go
deleted file mode 100644
index 8bab48c2..00000000
--- a/object/storer/mix/header.go
+++ /dev/null
@@ -1,30 +0,0 @@
-package mix
-
-import (
-	"errors"
-	"fmt"
-
-	objectid "codeberg.org/lindenii/furgit/object/id"
-	objectstorer "codeberg.org/lindenii/furgit/object/storer"
-	objecttype "codeberg.org/lindenii/furgit/object/type"
-)
-
-// ReadHeader reads object header data from one backend that has it.
-func (mix *Mix) ReadHeader(id objectid.ObjectID) (objecttype.Type, int64, error) {
-	for i, backend := 0, mix.firstBackend(); backend != nil; i, backend = i+1, mix.nextBackend(backend) {
-		ty, size, err := backend.ReadHeader(id)
-		if err == nil {
-			mix.touchBackend(backend)
-
-			return ty, size, nil
-		}
-
-		if errors.Is(err, objectstorer.ErrObjectNotFound) {
-			continue
-		}
-
-		return objecttype.TypeInvalid, 0, fmt.Errorf("objectstorer: backend %d read header: %w", i, err)
-	}
-
-	return objecttype.TypeInvalid, 0, objectstorer.ErrObjectNotFound
-}
diff --git a/object/storer/mix/mix.go b/object/storer/mix/mix.go
deleted file mode 100644
index 6154314f..00000000
--- a/object/storer/mix/mix.go
+++ /dev/null
@@ -1,20 +0,0 @@
-// Package mix provides an adaptive wrapper over multiple object storage
-// backends.
-package mix
-
-import (
-	"sync"
-
-	objectstorer "codeberg.org/lindenii/furgit/object/storer"
-)
-
-// Mix queries multiple object databases with an MRU backend preference.
-//
-// Mix borrows its backend stores.
-type Mix struct {
-	mu sync.RWMutex
-
-	backendHead        *backendNode
-	backendTail        *backendNode
-	backendNodeByStore map[objectstorer.Store]*backendNode
-}
diff --git a/object/storer/mix/mru.go b/object/storer/mix/mru.go
deleted file mode 100644
index 644fe818..00000000
--- a/object/storer/mix/mru.go
+++ /dev/null
@@ -1,74 +0,0 @@
-package mix
-
-import objectstorer "codeberg.org/lindenii/furgit/object/storer"
-
-type backendNode struct {
-	backend objectstorer.Store
-	prev    *backendNode
-	next    *backendNode
-}
-
-//nolint:ireturn
-func (mix *Mix) firstBackend() objectstorer.Store {
-	mix.mu.RLock()
-	defer mix.mu.RUnlock()
-
-	if mix.backendHead == nil {
-		return nil
-	}
-
-	return mix.backendHead.backend
-}
-
-//nolint:ireturn
-func (mix *Mix) nextBackend(current objectstorer.Store) objectstorer.Store {
-	mix.mu.RLock()
-	defer mix.mu.RUnlock()
-
-	node := mix.backendNodeByStore[current]
-	if node == nil || node.next == nil {
-		return nil
-	}
-
-	return node.next.backend
-}
-
-func (mix *Mix) touchBackend(backend objectstorer.Store) {
-	if backend == nil {
-		return
-	}
-
-	if !mix.mu.TryLock() {
-		return
-	}
-	defer mix.mu.Unlock()
-
-	node := mix.backendNodeByStore[backend]
-	if node == nil || node == mix.backendHead {
-		return
-	}
-
-	if node.prev != nil {
-		node.prev.next = node.next
-	}
-
-	if node.next != nil {
-		node.next.prev = node.prev
-	}
-
-	if mix.backendTail == node {
-		mix.backendTail = node.prev
-	}
-
-	node.prev = nil
-
-	node.next = mix.backendHead
-	if mix.backendHead != nil {
-		mix.backendHead.prev = node
-	}
-
-	mix.backendHead = node
-	if mix.backendTail == nil {
-		mix.backendTail = node
-	}
-}
diff --git a/object/storer/mix/new.go b/object/storer/mix/new.go
deleted file mode 100644
index c59d3b9f..00000000
--- a/object/storer/mix/new.go
+++ /dev/null
@@ -1,39 +0,0 @@
-package mix
-
-import objectstorer "codeberg.org/lindenii/furgit/object/storer"
-
-// New creates a Mix from backends.
-//
-// The provided backends must be non-nil and distinct.
-// Mix borrows the provided backends and does not close them in Close.
-func New(backends ...objectstorer.Store) *Mix {
-	nodeByStore := make(map[objectstorer.Store]*backendNode, len(backends))
-
-	var (
-		head *backendNode
-		tail *backendNode
-	)
-
-	for _, backend := range backends {
-		node := &backendNode{
-			backend: backend,
-			prev:    tail,
-		}
-		if tail != nil {
-			tail.next = node
-		}
-
-		if head == nil {
-			head = node
-		}
-
-		tail = node
-		nodeByStore[backend] = node
-	}
-
-	return &Mix{
-		backendHead:        head,
-		backendTail:        tail,
-		backendNodeByStore: nodeByStore,
-	}
-}
diff --git a/object/storer/mix/reader.go b/object/storer/mix/reader.go
deleted file mode 100644
index 7ddbaa4e..00000000
--- a/object/storer/mix/reader.go
+++ /dev/null
@@ -1,53 +0,0 @@
-package mix
-
-import (
-	"errors"
-	"fmt"
-	"io"
-
-	objectid "codeberg.org/lindenii/furgit/object/id"
-	objectstorer "codeberg.org/lindenii/furgit/object/storer"
-	objecttype "codeberg.org/lindenii/furgit/object/type"
-)
-
-// ReadReaderFull reads a full serialized object stream from one backend that
-// has it.
-func (mix *Mix) ReadReaderFull(id objectid.ObjectID) (io.ReadCloser, error) {
-	for i, backend := 0, mix.firstBackend(); backend != nil; i, backend = i+1, mix.nextBackend(backend) {
-		reader, err := backend.ReadReaderFull(id)
-		if err == nil {
-			mix.touchBackend(backend)
-
-			return reader, nil
-		}
-
-		if errors.Is(err, objectstorer.ErrObjectNotFound) {
-			continue
-		}
-
-		return nil, fmt.Errorf("objectstorer: backend %d read reader full: %w", i, err)
-	}
-
-	return nil, objectstorer.ErrObjectNotFound
-}
-
-// ReadReaderContent reads an object's type, declared content length, and
-// content stream from one backend that has it.
-func (mix *Mix) ReadReaderContent(id objectid.ObjectID) (objecttype.Type, int64, io.ReadCloser, error) {
-	for i, backend := 0, mix.firstBackend(); backend != nil; i, backend = i+1, mix.nextBackend(backend) {
-		ty, size, reader, err := backend.ReadReaderContent(id)
-		if err == nil {
-			mix.touchBackend(backend)
-
-			return ty, size, reader, nil
-		}
-
-		if errors.Is(err, objectstorer.ErrObjectNotFound) {
-			continue
-		}
-
-		return objecttype.TypeInvalid, 0, nil, fmt.Errorf("objectstorer: backend %d read reader content: %w", i, err)
-	}
-
-	return objecttype.TypeInvalid, 0, nil, objectstorer.ErrObjectNotFound
-}
diff --git a/object/storer/mix/refresh.go b/object/storer/mix/refresh.go
deleted file mode 100644
index 2e861a61..00000000
--- a/object/storer/mix/refresh.go
+++ /dev/null
@@ -1,30 +0,0 @@
-package mix
-
-import (
-	"errors"
-
-	objectstorer "codeberg.org/lindenii/furgit/object/storer"
-)
-
-// Refresh forwards refresh calls to refresh-capable backends.
-func (mix *Mix) Refresh() error {
-	mix.mu.RLock()
-
-	backends := make([]objectstorer.Store, 0, len(mix.backendNodeByStore))
-	for node := mix.backendHead; node != nil; node = node.next {
-		backends = append(backends, node.backend)
-	}
-
-	mix.mu.RUnlock()
-
-	var errs []error
-
-	for _, backend := range backends {
-		err := backend.Refresh()
-		if err != nil {
-			errs = append(errs, err)
-		}
-	}
-
-	return errors.Join(errs...)
-}
diff --git a/object/storer/mix/size.go b/object/storer/mix/size.go
deleted file mode 100644
index da8e02b7..00000000
--- a/object/storer/mix/size.go
+++ /dev/null
@@ -1,29 +0,0 @@
-package mix
-
-import (
-	"errors"
-	"fmt"
-
-	objectid "codeberg.org/lindenii/furgit/object/id"
-	objectstorer "codeberg.org/lindenii/furgit/object/storer"
-)
-
-// ReadSize reads object content length from one backend that has it.
-func (mix *Mix) ReadSize(id objectid.ObjectID) (int64, error) {
-	for i, backend := 0, mix.firstBackend(); backend != nil; i, backend = i+1, mix.nextBackend(backend) {
-		size, err := backend.ReadSize(id)
-		if err == nil {
-			mix.touchBackend(backend)
-
-			return size, nil
-		}
-
-		if errors.Is(err, objectstorer.ErrObjectNotFound) {
-			continue
-		}
-
-		return 0, fmt.Errorf("objectstorer: backend %d read size: %w", i, err)
-	}
-
-	return 0, objectstorer.ErrObjectNotFound
-}
diff --git a/object/storer/objectstore.go b/object/storer/objectstore.go
deleted file mode 100644
index 398e77ce..00000000
--- a/object/storer/objectstore.go
+++ /dev/null
@@ -1,92 +0,0 @@
-// Package objectstorer provides interfaces for object storage backends.
-package objectstorer
-
-import (
-	"errors"
-	"io"
-
-	objectid "codeberg.org/lindenii/furgit/object/id"
-	objecttype "codeberg.org/lindenii/furgit/object/type"
-)
-
-// ErrObjectNotFound indicates that an object does not exist in a backend.
-// This error MUST only be used in situations where the object store has
-// no specified object ID, but no other unexpected conditions were
-// encountered. In particular, it is not suitable for situations where one
-// object references another (such as a tree referencing a blob) but
-// the latter does not exist; these situations should use a separate
-// error (TODO).
-var ErrObjectNotFound = errors.New("objectstorer: object not found")
-
-// Store reads Git objects by object ID.
-//
-// Unless an implementation explicitly documents otherwise, values returned by
-// Store methods are only valid until the store is closed.
-type Store interface {
-	// ReadBytesFull reads a full serialized object as "type size\0content".
-	//
-	// In a valid repository, hashing this payload with the same algorithm yields
-	// the requested object ID. Readers should treat this as a repository
-	// invariant and should not re-verify it on every read.
-	//
-	// Any read-time integrity verification beyond producing this payload is
-	// implementation-defined.
-	ReadBytesFull(id objectid.ObjectID) ([]byte, error)
-
-	// ReadBytesContent reads an object's type and content bytes.
-	//
-	// Any read-time integrity verification beyond producing this payload is
-	// implementation-defined.
-	ReadBytesContent(id objectid.ObjectID) (objecttype.Type, []byte, error)
-
-	// ReadReaderFull reads a full serialized object stream as "type size\0content".
-	//
-	// Caller must close the returned reader.
-	// The returned reader is only valid until the store is closed.
-	//
-	// Any read-time integrity verification performed while producing the stream
-	// is implementation-defined.
-	ReadReaderFull(id objectid.ObjectID) (io.ReadCloser, error)
-
-	// ReadReaderContent reads an object's type, declared content length,
-	// and content stream.
-	//
-	// Caller must close the returned reader.
-	// The returned reader is only valid until the store is closed.
-	//
-	// Any read-time integrity verification performed while producing the stream
-	// is implementation-defined.
-	ReadReaderContent(id objectid.ObjectID) (objecttype.Type, int64, io.ReadCloser, error)
-
-	// ReadSize reads an object's declared content length.
-	//
-	// This is equivalent to ReadHeader(...).size and may be cheaper than
-	// ReadHeader when callers do not need object type.
-	//
-	// Any read-time integrity verification performed to produce the size is
-	// implementation-defined.
-	ReadSize(id objectid.ObjectID) (int64, error)
-
-	// ReadHeader reads an object's type and declared content length.
-	//
-	// Any read-time integrity verification performed to produce the header is
-	// implementation-defined.
-	ReadHeader(id objectid.ObjectID) (objecttype.Type, int64, error)
-
-	// Refresh updates any backend-local discovery/cache view of on-disk objects.
-	//
-	// Backends without dynamic discovery should return nil.
-	Refresh() error
-
-	// Close releases resources associated with the backend.
-	//
-	// Repeated calls to Close are undefined behavior unless the implementation
-	// explicitly documents otherwise.
-	Close() error
-}
-
-// type Cursor any
-//
-// Then make all read functions accept and provide a Cursor
-// nil must always be accepted and would exhibit the same behavior as right now
-// Non-nil behavior is implementation-defined: e.g., pack selection
diff --git a/object/storer/packed/TODO b/object/storer/packed/TODO
deleted file mode 100644
index f4a5f48e..00000000
--- a/object/storer/packed/TODO
+++ /dev/null
@@ -1,3 +0,0 @@
-* Per delta-plan memo map
-* Internal handle/request context (might expose it externally later and add to global interface)
-* Audit on mutex
diff --git a/object/storer/packed/close.go b/object/storer/packed/close.go
deleted file mode 100644
index f05a8573..00000000
--- a/object/storer/packed/close.go
+++ /dev/null
@@ -1,38 +0,0 @@
-package packed
-
-// Close releases mapped pack/index resources associated with the store.
-//
-// Store borrows its root, so Close does not close it.
-// Close releases cached pack/index mappings retained by the store.
-//
-// Repeated calls to Close are undefined behavior.
-func (store *Store) Close() error {
-	store.stateMu.Lock()
-	packs := store.packs
-	store.stateMu.Unlock()
-	store.idxMu.RLock()
-	indexes := store.idxByPack
-	store.idxMu.RUnlock()
-
-	var closeErr error
-
-	for _, pack := range packs {
-		err := pack.close()
-		if err != nil && closeErr == nil {
-			closeErr = err
-		}
-	}
-
-	for _, index := range indexes {
-		err := index.close()
-		if err != nil && closeErr == nil {
-			closeErr = err
-		}
-	}
-
-	store.cacheMu.Lock()
-	store.deltaCache.clear()
-	store.cacheMu.Unlock()
-
-	return closeErr
-}
diff --git a/object/storer/packed/delta_build_chain.go b/object/storer/packed/delta_build_chain.go
deleted file mode 100644
index d49a5cfc..00000000
--- a/object/storer/packed/delta_build_chain.go
+++ /dev/null
@@ -1,66 +0,0 @@
-package packed
-
-import (
-	"fmt"
-
-	packfmt "codeberg.org/lindenii/furgit/format/packfile"
-	objecttype "codeberg.org/lindenii/furgit/object/type"
-)
-
-// deltaBuildChain walks one object's chain and builds a reconstruction chain.
-func (store *Store) deltaBuildChain(start location) (deltaChain, error) {
-	visited := make(map[location]struct{})
-	current := start
-
-	var chain deltaChain
-
-	for {
-		if _, ok := visited[current]; ok {
-			return deltaChain{}, fmt.Errorf("objectstorer/packed: delta cycle while resolving object")
-		}
-
-		visited[current] = struct{}{}
-
-		_, meta, err := store.entryMetaAt(current)
-		if err != nil {
-			return deltaChain{}, err
-		}
-
-		if packfmt.IsBaseObjectType(meta.ty) {
-			chain.baseLoc = current
-			chain.baseType = meta.ty
-
-			return chain, nil
-		}
-
-		switch meta.ty {
-		case objecttype.TypeRefDelta:
-			chain.deltas = append(chain.deltas, deltaNode{
-				loc:        current,
-				dataOffset: meta.dataOffset,
-			})
-
-			next, err := store.lookup(meta.baseRefID)
-			if err != nil {
-				return deltaChain{}, err
-			}
-
-			current = next
-		case objecttype.TypeOfsDelta:
-			chain.deltas = append(chain.deltas, deltaNode{
-				loc:        current,
-				dataOffset: meta.dataOffset,
-			})
-			current = location{
-				packName: current.packName,
-				offset:   meta.baseOfs,
-			}
-		case objecttype.TypeCommit, objecttype.TypeTree, objecttype.TypeBlob, objecttype.TypeTag:
-			return deltaChain{}, fmt.Errorf("objectstorer/packed: internal invariant violation for base type %d", meta.ty)
-		case objecttype.TypeInvalid, objecttype.TypeFuture:
-			return deltaChain{}, fmt.Errorf("objectstorer/packed: unsupported pack type %d", meta.ty)
-		default:
-			return deltaChain{}, fmt.Errorf("objectstorer/packed: unsupported pack type %d", meta.ty)
-		}
-	}
-}
diff --git a/object/storer/packed/delta_cache.go b/object/storer/packed/delta_cache.go
deleted file mode 100644
index 3bf3a035..00000000
--- a/object/storer/packed/delta_cache.go
+++ /dev/null
@@ -1,61 +0,0 @@
-package packed
-
-import (
-	"codeberg.org/lindenii/furgit/internal/lru"
-	objecttype "codeberg.org/lindenii/furgit/object/type"
-)
-
-const defaultDeltaCacheMaxBytes = 32 << 20
-
-// deltaBaseKey identifies one base object by pack location.
-type deltaBaseKey struct {
-	packName string
-	offset   uint64
-}
-
-// deltaBaseValue stores one cached base object body.
-type deltaBaseValue struct {
-	ty      objecttype.Type
-	content []byte
-}
-
-// deltaCache wraps a weighted LRU for resolved delta bases.
-type deltaCache struct {
-	lru *lru.Cache[deltaBaseKey, deltaBaseValue]
-}
-
-// newDeltaCache creates a delta base cache with a byte budget.
-func newDeltaCache(maxBytes int64) *deltaCache {
-	return &deltaCache{
-		lru: lru.New(
-			maxBytes,
-			func(_ deltaBaseKey, value deltaBaseValue) int64 {
-				return int64(len(value.content))
-			},
-			nil,
-		),
-	}
-}
-
-// get returns a cloned cached base object value.
-func (cache *deltaCache) get(key deltaBaseKey) (objecttype.Type, []byte, bool) {
-	value, ok := cache.lru.Get(key)
-	if !ok {
-		return objecttype.TypeInvalid, nil, false
-	}
-
-	return value.ty, append([]byte(nil), value.content...), true
-}
-
-// add stores a cloned base object value.
-func (cache *deltaCache) add(key deltaBaseKey, ty objecttype.Type, content []byte) {
-	cache.lru.Add(key, deltaBaseValue{
-		ty:      ty,
-		content: append([]byte(nil), content...),
-	})
-}
-
-// clear removes all cached entries.
-func (cache *deltaCache) clear() {
-	cache.lru.Clear()
-}
diff --git a/object/storer/packed/delta_chain.go b/object/storer/packed/delta_chain.go
deleted file mode 100644
index 372e89cd..00000000
--- a/object/storer/packed/delta_chain.go
+++ /dev/null
@@ -1,13 +0,0 @@
-package packed
-
-import objecttype "codeberg.org/lindenii/furgit/object/type"
-
-// deltaChain describes how to reconstruct one requested object.
-type deltaChain struct {
-	// baseLoc points to the innermost base object.
-	baseLoc location
-	// baseType is the canonical object type resolved from baseLoc.
-	baseType objecttype.Type
-	// deltas contains delta objects from target down toward base.
-	deltas []deltaNode
-}
diff --git a/object/storer/packed/delta_node.go b/object/storer/packed/delta_node.go
deleted file mode 100644
index 24ede1e0..00000000
--- a/object/storer/packed/delta_node.go
+++ /dev/null
@@ -1,9 +0,0 @@
-package packed
-
-// deltaNode describes one delta object in a reconstruction chain.
-type deltaNode struct {
-	// loc identifies the delta object's pack location.
-	loc location
-	// dataOffset points to the start of the delta zlib payload in pack.
-	dataOffset int
-}
diff --git a/object/storer/packed/delta_resolve_chain.go b/object/storer/packed/delta_resolve_chain.go
deleted file mode 100644
index 9a07c8d5..00000000
--- a/object/storer/packed/delta_resolve_chain.go
+++ /dev/null
@@ -1,61 +0,0 @@
-package packed
-
-import (
-	"fmt"
-
-	deltaapply "codeberg.org/lindenii/furgit/format/packfile/delta/apply"
-	objecttype "codeberg.org/lindenii/furgit/object/type"
-)
-
-// deltaResolveChain resolves one object chain into content bytes.
-func (store *Store) deltaResolveChain(chain deltaChain, declaredSize int64) (objecttype.Type, []byte, error) {
-	ty, out, nextDelta, err := store.deltaResolveChainStart(chain)
-	if err != nil {
-		return objecttype.TypeInvalid, nil, err
-	}
-
-	for i := nextDelta; i >= 0; i-- {
-		node := chain.deltas[i]
-
-		pack, err := store.openPack(node.loc.packName)
-		if err != nil {
-			return objecttype.TypeInvalid, nil, err
-		}
-
-		delta, err := inflateAt(pack, node.dataOffset, -1)
-		if err != nil {
-			return objecttype.TypeInvalid, nil, err
-		}
-
-		out, err = deltaapply.Apply(out, delta)
-		if err != nil {
-			return objecttype.TypeInvalid, nil, err
-		}
-
-		store.cacheMu.Lock()
-		store.deltaCache.add(
-			deltaBaseKey{packName: node.loc.packName, offset: node.loc.offset},
-			ty,
-			out,
-		)
-		store.cacheMu.Unlock()
-	}
-
-	if int64(len(out)) != declaredSize {
-		return objecttype.TypeInvalid, nil, fmt.Errorf(
-			"objectstorer/packed: resolved content size mismatch: got %d want %d",
-			len(out),
-			declaredSize,
-		)
-	}
-
-	if ty != chain.baseType {
-		return objecttype.TypeInvalid, nil, fmt.Errorf(
-			"objectstorer/packed: resolved content type mismatch: got %d want %d",
-			ty,
-			chain.baseType,
-		)
-	}
-
-	return ty, out, nil
-}
diff --git a/object/storer/packed/delta_resolve_chain_start.go b/object/storer/packed/delta_resolve_chain_start.go
deleted file mode 100644
index 00ad7057..00000000
--- a/object/storer/packed/delta_resolve_chain_start.go
+++ /dev/null
@@ -1,59 +0,0 @@
-package packed
-
-import (
-	"fmt"
-
-	packfmt "codeberg.org/lindenii/furgit/format/packfile"
-	objecttype "codeberg.org/lindenii/furgit/object/type"
-)
-
-// deltaResolveChainStart finds the nearest cached chain node or inflates the
-// innermost base object. It returns the starting bytes and the next delta index
-// to apply in reverse order.
-func (store *Store) deltaResolveChainStart(chain deltaChain) (objecttype.Type, []byte, int, error) {
-	for i, node := range chain.deltas {
-		store.cacheMu.RLock()
-		ty, out, ok := store.deltaCache.get(
-			deltaBaseKey{packName: node.loc.packName, offset: node.loc.offset},
-		)
-		store.cacheMu.RUnlock()
-
-		if ok {
-			return ty, out, i - 1, nil
-		}
-	}
-
-	store.cacheMu.RLock()
-	ty, out, ok := store.deltaCache.get(
-		deltaBaseKey{packName: chain.baseLoc.packName, offset: chain.baseLoc.offset},
-	)
-	store.cacheMu.RUnlock()
-
-	if ok {
-		return ty, out, len(chain.deltas) - 1, nil
-	}
-
-	pack, meta, err := store.entryMetaAt(chain.baseLoc)
-	if err != nil {
-		return objecttype.TypeInvalid, nil, 0, err
-	}
-
-	if !packfmt.IsBaseObjectType(meta.ty) {
-		return objecttype.TypeInvalid, nil, 0, fmt.Errorf("objectstorer/packed: delta chain base is not a base object")
-	}
-
-	base, err := inflateAt(pack, meta.dataOffset, meta.size)
-	if err != nil {
-		return objecttype.TypeInvalid, nil, 0, err
-	}
-
-	store.cacheMu.Lock()
-	store.deltaCache.add(
-		deltaBaseKey{packName: chain.baseLoc.packName, offset: chain.baseLoc.offset},
-		meta.ty,
-		base,
-	)
-	store.cacheMu.Unlock()
-
-	return meta.ty, base, len(chain.deltas) - 1, nil
-}
diff --git a/object/storer/packed/delta_resolve_content.go b/object/storer/packed/delta_resolve_content.go
deleted file mode 100644
index 9a24873b..00000000
--- a/object/storer/packed/delta_resolve_content.go
+++ /dev/null
@@ -1,29 +0,0 @@
-package packed
-
-import (
-	packfmt "codeberg.org/lindenii/furgit/format/packfile"
-	objecttype "codeberg.org/lindenii/furgit/object/type"
-)
-
-// deltaResolveContent resolves one object's content bytes from its pack location.
-func (store *Store) deltaResolveContent(start location) (objecttype.Type, []byte, error) {
-	chain, err := store.deltaBuildChain(start)
-	if err != nil {
-		return objecttype.TypeInvalid, nil, err
-	}
-
-	pack, meta, err := store.entryMetaAt(start)
-	if err != nil {
-		return objecttype.TypeInvalid, nil, err
-	}
-
-	declaredSize := meta.size
-	if !packfmt.IsBaseObjectType(meta.ty) {
-		declaredSize, err = deltaDeclaredSizeAt(pack, meta.dataOffset)
-		if err != nil {
-			return objecttype.TypeInvalid, nil, err
-		}
-	}
-
-	return store.deltaResolveChain(chain, declaredSize)
-}
diff --git a/object/storer/packed/delta_size.go b/object/storer/packed/delta_size.go
deleted file mode 100644
index e5ba3bb7..00000000
--- a/object/storer/packed/delta_size.go
+++ /dev/null
@@ -1,27 +0,0 @@
-package packed
-
-import (
-	"bufio"
-
-	deltaapply "codeberg.org/lindenii/furgit/format/packfile/delta/apply"
-)
-
-// deltaDeclaredSizeAt returns the resolved object size declared by one delta
-// stream header at dataOffset.
-func deltaDeclaredSizeAt(pack *packFile, dataOffset int) (int64, error) {
-	reader, err := zlibReaderAt(pack, dataOffset)
-	if err != nil {
-		return 0, err
-	}
-
-	defer func() { _ = reader.Close() }()
-
-	br := bufio.NewReaderSize(reader, 32)
-
-	_, size, err := deltaapply.ReadHeaderSizes(br)
-	if err != nil {
-		return 0, err
-	}
-
-	return int64(size), nil
-}
diff --git a/object/storer/packed/entry_inflate.go b/object/storer/packed/entry_inflate.go
deleted file mode 100644
index b7926b70..00000000
--- a/object/storer/packed/entry_inflate.go
+++ /dev/null
@@ -1,55 +0,0 @@
-package packed
-
-import (
-	"bytes"
-	"fmt"
-	"io"
-	"math"
-
-	"codeberg.org/lindenii/furgit/internal/compress/zlib"
-)
-
-// zlibReaderAt opens a zlib reader starting at data offset within pack.
-func zlibReaderAt(pack *packFile, offset int) (io.ReadCloser, error) {
-	if offset < 0 || offset > len(pack.data) {
-		return nil, fmt.Errorf("objectstorer/packed: pack %q zlib offset out of bounds", pack.name)
-	}
-
-	return zlib.NewReader(bytes.NewReader(pack.data[offset:]))
-}
-
-// inflateAt inflates one entry payload from data offset.
-func inflateAt(pack *packFile, offset int, expectedSize int64) ([]byte, error) {
-	reader, err := zlibReaderAt(pack, offset)
-	if err != nil {
-		return nil, err
-	}
-
-	defer func() { _ = reader.Close() }()
-
-	if expectedSize >= 0 {
-		if expectedSize > int64(math.MaxInt) {
-			return nil, fmt.Errorf(
-				"objectstorer/packed: pack %q expected inflated size overflows int: %d",
-				pack.name,
-				expectedSize,
-			)
-		}
-
-		body := make([]byte, int(expectedSize))
-
-		_, err := io.ReadFull(reader, body)
-		if err != nil {
-			return nil, err
-		}
-
-		return body, nil
-	}
-
-	body, err := io.ReadAll(reader)
-	if err != nil {
-		return nil, err
-	}
-
-	return body, nil
-}
diff --git a/object/storer/packed/entry_meta.go b/object/storer/packed/entry_meta.go
deleted file mode 100644
index 0bbe8bef..00000000
--- a/object/storer/packed/entry_meta.go
+++ /dev/null
@@ -1,16 +0,0 @@
-package packed
-
-// entryMetaAt parses one pack entry header at location.
-func (store *Store) entryMetaAt(loc location) (*packFile, entryMeta, error) {
-	pack, err := store.openPack(loc.packName)
-	if err != nil {
-		return nil, entryMeta{}, err
-	}
-
-	meta, err := parseEntryMeta(pack, store.algo, loc.offset)
-	if err != nil {
-		return nil, entryMeta{}, err
-	}
-
-	return pack, meta, nil
-}
diff --git a/object/storer/packed/entry_parse.go b/object/storer/packed/entry_parse.go
deleted file mode 100644
index ddbae005..00000000
--- a/object/storer/packed/entry_parse.go
+++ /dev/null
@@ -1,71 +0,0 @@
-package packed
-
-import (
-	"fmt"
-
-	packfmt "codeberg.org/lindenii/furgit/format/packfile"
-	"codeberg.org/lindenii/furgit/internal/intconv"
-	objectid "codeberg.org/lindenii/furgit/object/id"
-	objecttype "codeberg.org/lindenii/furgit/object/type"
-)
-
-// entryMeta describes one parsed pack entry header.
-type entryMeta struct {
-	// ty is the pack entry type tag.
-	ty objecttype.Type
-	// size is the declared resulting content size.
-	size int64
-	// dataOffset points to the zlib payload start.
-	dataOffset int
-	// baseRefID is set for ref-delta entries.
-	baseRefID objectid.ObjectID
-	// baseOfs is set for ofs-delta entries.
-	baseOfs uint64
-}
-
-// parseEntryMeta parses one pack entry header at offset.
-func parseEntryMeta(pack *packFile, algo objectid.Algorithm, offset uint64) (entryMeta, error) {
-	var zero entryMeta
-	if offset >= uint64(len(pack.data)) {
-		return zero, fmt.Errorf("objectstorer/packed: pack %q offset %d out of bounds", pack.name, offset)
-	}
-
-	pos, err := intconv.Uint64ToInt(offset)
-	if err != nil {
-		return zero, fmt.Errorf("objectstorer/packed: pack %q offset conversion: %w", pack.name, err)
-	}
-
-	entry, err := packfmt.ParseEntry(pack.data[pos:], algo.Size())
-	if err != nil {
-		return zero, fmt.Errorf("objectstorer/packed: pack %q: %w", pack.name, err)
-	}
-
-	meta := entryMeta{
-		ty:         entry.Type,
-		size:       entry.Size,
-		dataOffset: pos + entry.DataOffset,
-	}
-	switch meta.ty {
-	case objecttype.TypeRefDelta:
-		baseID, err := objectid.FromBytes(algo, entry.RefBaseID)
-		if err != nil {
-			return zero, fmt.Errorf("objectstorer/packed: pack %q invalid ref-delta base id: %w", pack.name, err)
-		}
-
-		meta.baseRefID = baseID
-	case objecttype.TypeOfsDelta:
-		if offset <= entry.OfsBaseDistance {
-			return zero, fmt.Errorf("objectstorer/packed: pack %q has invalid ofs-delta base", pack.name)
-		}
-
-		meta.baseOfs = offset - entry.OfsBaseDistance
-	case objecttype.TypeCommit, objecttype.TypeTree, objecttype.TypeBlob, objecttype.TypeTag:
-		// Base object types do not have delta base metadata.
-	case objecttype.TypeInvalid, objecttype.TypeFuture:
-		return zero, fmt.Errorf("objectstorer/packed: pack %q has unsupported entry type %d", pack.name, meta.ty)
-	default:
-		return zero, fmt.Errorf("objectstorer/packed: pack %q has unsupported entry type %d", pack.name, meta.ty)
-	}
-
-	return meta, nil
-}
diff --git a/object/storer/packed/helpers_test.go b/object/storer/packed/helpers_test.go
deleted file mode 100644
index 2d5e99a9..00000000
--- a/object/storer/packed/helpers_test.go
+++ /dev/null
@@ -1,102 +0,0 @@
-package packed_test
-
-import (
-	"fmt"
-	"io"
-	"strconv"
-	"strings"
-	"testing"
-
-	"codeberg.org/lindenii/furgit/internal/testgit"
-	objectheader "codeberg.org/lindenii/furgit/object/header"
-	objectid "codeberg.org/lindenii/furgit/object/id"
-	"codeberg.org/lindenii/furgit/object/storer/packed"
-	objecttype "codeberg.org/lindenii/furgit/object/type"
-)
-
-func openPackedStore(t *testing.T, testRepo *testgit.TestRepo, algo objectid.Algorithm) *packed.Store {
-	t.Helper()
-
-	root := testRepo.OpenPackRoot(t)
-
-	store, err := packed.New(root, algo, packed.Options{})
-	if err != nil {
-		t.Fatalf("packed.New: %v", err)
-	}
-
-	return store
-}
-
-func mustReadAllAndClose(t *testing.T, reader io.ReadCloser) []byte {
-	t.Helper()
-
-	data, err := io.ReadAll(reader)
-	if err != nil {
-		_ = reader.Close()
-
-		t.Fatalf("ReadAll: %v", err)
-	}
-
-	err = reader.Close()
-	if err != nil {
-		t.Fatalf("Close: %v", err)
-	}
-
-	return data
-}
-
-func expectedRawObject(t *testing.T, testRepo *testgit.TestRepo, id objectid.ObjectID) (objecttype.Type, []byte, []byte) {
-	t.Helper()
-
-	typeName := testRepo.Run(t, "cat-file", "-t", id.String())
-
-	ty, ok := objecttype.ParseName(typeName)
-	if !ok {
-		t.Fatalf("ParseName(%q) failed", typeName)
-	}
-
-	body := testRepo.CatFile(t, typeName, id)
-
-	header, ok := objectheader.Encode(ty, int64(len(body)))
-	if !ok {
-		t.Fatalf("objectheader.Encode failed")
-	}
-
-	raw := make([]byte, len(header)+len(body))
-	copy(raw, header)
-	copy(raw[len(header):], body)
-
-	return ty, body, raw
-}
-
-func createPackedFixtureRepo(t *testing.T, algo objectid.Algorithm) (*testgit.TestRepo, []objectid.ObjectID) {
-	t.Helper()
-
-	testRepo := testgit.NewRepo(t, testgit.RepoOptions{ObjectFormat: algo, Bare: true})
-	blobID, treeID, commitID := testRepo.MakeCommit(t, "packed store base commit")
-	testRepo.Run(t, "update-ref", "refs/heads/main", commitID.String())
-	tagID := testRepo.TagAnnotated(t, "v1.0.0", commitID, "packed-store-tag")
-
-	parent := commitID
-
-	for i := range 24 {
-		content := "common-prefix\n" + strings.Repeat("line-"+strconv.Itoa(i%3)+"\n", 256) + fmt.Sprintf("tail-%d\n", i)
-		nextBlob, nextTree := testRepo.MakeSingleFileTree(t, fmt.Sprintf("file-%02d.txt", i), []byte(content))
-		nextCommit := testRepo.CommitTree(t, nextTree, fmt.Sprintf("commit-%02d", i), parent)
-		testRepo.Run(t, "update-ref", "refs/heads/main", nextCommit.String())
-		parent = nextCommit
-
-		_ = nextBlob
-		_ = nextTree
-	}
-
-	testRepo.Repack(t, "-a", "-d", "-f", "--window=64", "--depth=64")
-
-	return testRepo, []objectid.ObjectID{
-		blobID,
-		treeID,
-		commitID,
-		tagID,
-		parent,
-	}
-}
diff --git a/object/storer/packed/idx.go b/object/storer/packed/idx.go
deleted file mode 100644
index 5024f2f3..00000000
--- a/object/storer/packed/idx.go
+++ /dev/null
@@ -1,36 +0,0 @@
-package packed
-
-import (
-	"os"
-
-	objectid "codeberg.org/lindenii/furgit/object/id"
-)
-
-// idxFile stores one mapped and validated idx v2 file.
-type idxFile struct {
-	// idxName is the basename of this .idx file.
-	idxName string
-	// packName is the matching .pack basename.
-	packName string
-	// algo is the hash algorithm encoded by the index.
-	algo objectid.Algorithm
-
-	// file is the opened index file descriptor.
-	file *os.File
-	// data is the mapped index bytes.
-	data []byte
-
-	// fanout stores fanout table values.
-	fanout [256]uint32
-	// numObjects equals fanout[255].
-	numObjects int
-
-	// namesOffset starts the sorted object-id table.
-	namesOffset int
-	// offset32Offset starts the 32-bit offset table.
-	offset32Offset int
-	// offset64Offset starts the 64-bit offset table.
-	offset64Offset int
-	// offset64Count is the number of 64-bit offset entries.
-	offset64Count int
-}
diff --git a/object/storer/packed/idx_candidates_mru.go b/object/storer/packed/idx_candidates_mru.go
deleted file mode 100644
index d0cc7052..00000000
--- a/object/storer/packed/idx_candidates_mru.go
+++ /dev/null
@@ -1,136 +0,0 @@
-package packed
-
-// packCandidateNode is one node in the candidate MRU order list.
-type packCandidateNode struct {
-	packName string
-	prev     *packCandidateNode
-	next     *packCandidateNode
-}
-
-func (store *Store) reconcileMRU(candidates []packCandidate) {
-	store.mruMu.Lock()
-	defer store.mruMu.Unlock()
-
-	if store.mruNodeByPack == nil {
-		store.mruNodeByPack = make(map[string]*packCandidateNode, len(candidates))
-	}
-
-	present := make(map[string]struct{}, len(candidates))
-	for _, candidate := range candidates {
-		present[candidate.packName] = struct{}{}
-	}
-
-	ordered := make([]string, 0, len(candidates))
-
-	for node := store.mruHead; node != nil; node = node.next {
-		if _, ok := present[node.packName]; !ok {
-			continue
-		}
-
-		ordered = append(ordered, node.packName)
-		delete(present, node.packName)
-	}
-
-	for _, candidate := range candidates {
-		if _, ok := present[candidate.packName]; !ok {
-			continue
-		}
-
-		ordered = append(ordered, candidate.packName)
-		delete(present, candidate.packName)
-	}
-
-	store.mruHead = nil
-	store.mruTail = nil
-	store.mruNodeByPack = make(map[string]*packCandidateNode, len(ordered))
-
-	for _, packName := range ordered {
-		node := &packCandidateNode{
-			packName: packName,
-			prev:     store.mruTail,
-		}
-		if store.mruTail != nil {
-			store.mruTail.next = node
-		}
-
-		if store.mruHead == nil {
-			store.mruHead = node
-		}
-
-		store.mruTail = node
-		store.mruNodeByPack[packName] = node
-	}
-}
-
-// touchCandidate moves one candidate to the front of the lookup order.
-// This is done on a best-effort basis.
-func (store *Store) touchCandidate(packName string) {
-	if !store.mruMu.TryLock() {
-		return
-	}
-	defer store.mruMu.Unlock()
-
-	node := store.mruNodeByPack[packName]
-	if node == nil || node == store.mruHead {
-		return
-	}
-
-	if node.prev != nil {
-		node.prev.next = node.next
-	}
-
-	if node.next != nil {
-		node.next.prev = node.prev
-	}
-
-	if store.mruTail == node {
-		store.mruTail = node.prev
-	}
-
-	node.prev = nil
-
-	node.next = store.mruHead
-	if store.mruHead != nil {
-		store.mruHead.prev = node
-	}
-
-	store.mruHead = node
-	if store.mruTail == nil {
-		store.mruTail = node
-	}
-}
-
-// firstCandidatePackName returns the current head pack name, or "" when none
-// are available.
-func (store *Store) firstCandidatePackName(snapshot *candidateSnapshot) string {
-	store.mruMu.RLock()
-	defer store.mruMu.RUnlock()
-
-	for node := store.mruHead; node != nil; node = node.next {
-		if _, ok := snapshot.candidateByPack[node.packName]; ok {
-			return node.packName
-		}
-	}
-
-	return ""
-}
-
-// nextCandidatePackName returns the pack name after currentPack in current MRU
-// order, or "" at end / when currentPack is not present.
-func (store *Store) nextCandidatePackName(currentPack string, snapshot *candidateSnapshot) string {
-	store.mruMu.RLock()
-	defer store.mruMu.RUnlock()
-
-	node := store.mruNodeByPack[currentPack]
-	if node == nil {
-		return ""
-	}
-
-	for node = node.next; node != nil; node = node.next {
-		if _, ok := snapshot.candidateByPack[node.packName]; ok {
-			return node.packName
-		}
-	}
-
-	return ""
-}
diff --git a/object/storer/packed/idx_close.go b/object/storer/packed/idx_close.go
deleted file mode 100644
index 814ec987..00000000
--- a/object/storer/packed/idx_close.go
+++ /dev/null
@@ -1,28 +0,0 @@
-package packed
-
-import "syscall"
-
-// close unmaps and closes one idx handle.
-func (index *idxFile) close() error {
-	var closeErr error
-
-	if index.data != nil {
-		err := syscall.Munmap(index.data)
-		if err != nil && closeErr == nil {
-			closeErr = err
-		}
-
-		index.data = nil
-	}
-
-	if index.file != nil {
-		err := index.file.Close()
-		if err != nil && closeErr == nil {
-			closeErr = err
-		}
-
-		index.file = nil
-	}
-
-	return closeErr
-}
diff --git a/object/storer/packed/idx_lookup.go b/object/storer/packed/idx_lookup.go
deleted file mode 100644
index 899a5acc..00000000
--- a/object/storer/packed/idx_lookup.go
+++ /dev/null
@@ -1,91 +0,0 @@
-package packed
-
-import (
-	"bytes"
-	"encoding/binary"
-	"fmt"
-
-	objectid "codeberg.org/lindenii/furgit/object/id"
-)
-
-// lookup resolves one object ID to its pack offset within this index.
-func (index *idxFile) lookup(id objectid.ObjectID) (uint64, bool, error) {
-	if id.Algorithm() != index.algo {
-		return 0, false, fmt.Errorf("objectstorer/packed: object id algorithm mismatch")
-	}
-
-	idBytes := (&id).RawBytes()
-
-	hashSize := len(idBytes)
-	if hashSize != index.algo.Size() {
-		return 0, false, fmt.Errorf("objectstorer/packed: unexpected object id length")
-	}
-
-	first := int(idBytes[0])
-
-	lo := 0
-	if first > 0 {
-		lo = int(index.fanout[first-1])
-	}
-
-	hi := int(index.fanout[first])
-	if lo < 0 || hi < 0 || lo > hi || hi > index.numObjects {
-		return 0, false, fmt.Errorf("objectstorer/packed: idx %q has invalid fanout bounds", index.idxName)
-	}
-
-	for lo < hi {
-		mid := lo + (hi-lo)/2
-
-		nameOffset := index.namesOffset + mid*hashSize
-		if nameOffset < 0 || nameOffset+hashSize > len(index.data) {
-			return 0, false, fmt.Errorf("objectstorer/packed: idx %q truncated name table", index.idxName)
-		}
-
-		cmp := bytes.Compare(index.data[nameOffset:nameOffset+hashSize], idBytes)
-		if cmp == 0 {
-			offset, err := index.offsetAt(mid)
-			if err != nil {
-				return 0, false, err
-			}
-
-			return offset, true, nil
-		}
-
-		if cmp < 0 {
-			lo = mid + 1
-		} else {
-			hi = mid
-		}
-	}
-
-	return 0, false, nil
-}
-
-// offsetAt resolves the pack offset for one object index entry.
-func (index *idxFile) offsetAt(objectIndex int) (uint64, error) {
-	if objectIndex < 0 || objectIndex >= index.numObjects {
-		return 0, fmt.Errorf("objectstorer/packed: idx %q offset index out of bounds", index.idxName)
-	}
-
-	wordOffset := index.offset32Offset + objectIndex*4
-	if wordOffset < 0 || wordOffset+4 > len(index.data) {
-		return 0, fmt.Errorf("objectstorer/packed: idx %q truncated 32-bit offset table", index.idxName)
-	}
-
-	word := binary.BigEndian.Uint32(index.data[wordOffset : wordOffset+4])
-	if word&0x80000000 == 0 {
-		return uint64(word), nil
-	}
-
-	pos := int(word & 0x7fffffff)
-	if pos < 0 || pos >= index.offset64Count {
-		return 0, fmt.Errorf("objectstorer/packed: idx %q invalid 64-bit offset position", index.idxName)
-	}
-
-	offOffset := index.offset64Offset + pos*8
-	if offOffset < 0 || offOffset+8 > len(index.data)-2*index.algo.Size() {
-		return 0, fmt.Errorf("objectstorer/packed: idx %q truncated 64-bit offset table", index.idxName)
-	}
-
-	return binary.BigEndian.Uint64(index.data[offOffset : offOffset+8]), nil
-}
diff --git a/object/storer/packed/idx_lookup_candidates.go b/object/storer/packed/idx_lookup_candidates.go
deleted file mode 100644
index 8946eb03..00000000
--- a/object/storer/packed/idx_lookup_candidates.go
+++ /dev/null
@@ -1,126 +0,0 @@
-package packed
-
-import (
-	"fmt"
-	"os"
-	"slices"
-	"strings"
-)
-
-// packCandidate describes one discovered pack/index pair.
-type packCandidate struct {
-	// packName is the .pack basename.
-	packName string
-	// idxName is the .idx basename.
-	idxName string
-	// mtime is the pack file modification time for initial ordering.
-	mtime int64
-}
-
-type candidateSnapshot struct {
-	candidates      []packCandidate
-	candidateByPack map[string]packCandidate
-}
-
-// Refresh rescans objects/pack and atomically installs a fresh candidate list
-// for future lookups.
-//
-// Refresh does not invalidate existing readers. Cached pack/index mappings,
-// including ones for previously visible candidates, may be retained until
-// Close.
-func (store *Store) Refresh() error {
-	store.refreshMu.Lock()
-	defer store.refreshMu.Unlock()
-
-	candidates, err := store.discoverCandidates()
-	if err != nil {
-		return err
-	}
-
-	candidateByPack := make(map[string]packCandidate, len(candidates))
-	for _, candidate := range candidates {
-		candidateByPack[candidate.packName] = candidate
-	}
-
-	store.reconcileMRU(candidates)
-
-	store.candidates.Store(&candidateSnapshot{
-		candidates:      candidates,
-		candidateByPack: candidateByPack,
-	})
-
-	return nil
-}
-
-func (store *Store) ensureCandidates() (*candidateSnapshot, error) {
-	snapshot := store.candidates.Load()
-	if snapshot != nil {
-		return snapshot, nil
-	}
-
-	err := store.Refresh()
-	if err != nil {
-		return nil, err
-	}
-
-	return store.candidates.Load(), nil
-}
-
-// discoverCandidates scans the objects/pack root and returns sorted pack/index
-// pairs.
-func (store *Store) discoverCandidates() ([]packCandidate, error) {
-	dir, err := store.root.Open(".")
-	if err != nil {
-		if os.IsNotExist(err) {
-			return nil, nil
-		}
-
-		return nil, err
-	}
-
-	defer func() { _ = dir.Close() }()
-
-	entries, err := dir.ReadDir(-1)
-	if err != nil {
-		return nil, err
-	}
-
-	candidates := make([]packCandidate, 0, len(entries))
-	for _, entry := range entries {
-		if entry.IsDir() || !strings.HasSuffix(entry.Name(), ".idx") {
-			continue
-		}
-
-		idxName := entry.Name()
-		packName := strings.TrimSuffix(idxName, ".idx") + ".pack"
-
-		packInfo, err := store.root.Stat(packName)
-		if err != nil {
-			if os.IsNotExist(err) {
-				return nil, fmt.Errorf("objectstorer/packed: missing pack file for index %q", idxName)
-			}
-
-			return nil, err
-		}
-
-		candidates = append(candidates, packCandidate{
-			packName: packName,
-			idxName:  idxName,
-			mtime:    packInfo.ModTime().UnixNano(),
-		})
-	}
-
-	slices.SortFunc(candidates, func(a, b packCandidate) int {
-		if a.mtime != b.mtime {
-			if a.mtime > b.mtime {
-				return -1
-			}
-
-			return 1
-		}
-
-		return strings.Compare(a.packName, b.packName)
-	})
-
-	return candidates, nil
-}
diff --git a/object/storer/packed/idx_open.go b/object/storer/packed/idx_open.go
deleted file mode 100644
index 3e1d7d74..00000000
--- a/object/storer/packed/idx_open.go
+++ /dev/null
@@ -1,98 +0,0 @@
-package packed
-
-import (
-	"fmt"
-	"os"
-	"syscall"
-
-	"codeberg.org/lindenii/furgit/internal/intconv"
-	objectid "codeberg.org/lindenii/furgit/object/id"
-)
-
-// openIndex returns one opened and parsed index, caching it by pack basename.
-func (store *Store) openIndex(candidate packCandidate) (*idxFile, error) {
-	store.idxMu.RLock()
-
-	index, ok := store.idxByPack[candidate.packName]
-	if ok {
-		store.idxMu.RUnlock()
-
-		return index, nil
-	}
-
-	store.idxMu.RUnlock()
-
-	index, err := openIdxFile(store.root, candidate.idxName, candidate.packName, store.algo)
-	if err != nil {
-		return nil, err
-	}
-
-	store.idxMu.Lock()
-
-	existing, ok := store.idxByPack[candidate.packName]
-	if ok {
-		store.idxMu.Unlock()
-
-		_ = index.close()
-
-		return existing, nil
-	}
-
-	store.idxByPack[candidate.packName] = index
-	store.idxMu.Unlock()
-
-	return index, nil
-}
-
-// openIdxFile maps and validates one idx v2 file.
-func openIdxFile(root *os.Root, idxName, packName string, algo objectid.Algorithm) (*idxFile, error) {
-	file, err := root.Open(idxName)
-	if err != nil {
-		return nil, err
-	}
-
-	info, err := file.Stat()
-	if err != nil {
-		_ = file.Close()
-
-		return nil, err
-	}
-
-	size := info.Size()
-	if size < 0 || size > int64(int(^uint(0)>>1)) {
-		_ = file.Close()
-
-		return nil, fmt.Errorf("objectstorer/packed: idx %q has unsupported size", idxName)
-	}
-
-	fd, err := intconv.UintptrToInt(file.Fd())
-	if err != nil {
-		_ = file.Close()
-
-		return nil, err
-	}
-
-	data, err := syscall.Mmap(fd, 0, int(size), syscall.PROT_READ, syscall.MAP_PRIVATE)
-	if err != nil {
-		_ = file.Close()
-
-		return nil, err
-	}
-
-	index := &idxFile{
-		idxName:  idxName,
-		packName: packName,
-		algo:     algo,
-		file:     file,
-		data:     data,
-	}
-
-	err = index.parse()
-	if err != nil {
-		_ = index.close()
-
-		return nil, err
-	}
-
-	return index, nil
-}
diff --git a/object/storer/packed/idx_parse.go b/object/storer/packed/idx_parse.go
deleted file mode 100644
index 128f01a2..00000000
--- a/object/storer/packed/idx_parse.go
+++ /dev/null
@@ -1,78 +0,0 @@
-package packed
-
-import (
-	"encoding/binary"
-	"fmt"
-)
-
-const (
-	idxMagicV2   = 0xff744f63
-	idxVersionV2 = 2
-)
-
-// parse validates mapped idx v2 structure and stores table boundaries.
-func (index *idxFile) parse() error {
-	hashSize := index.algo.Size()
-	if hashSize <= 0 {
-		return fmt.Errorf("objectstorer/packed: idx %q has invalid hash algorithm", index.idxName)
-	}
-
-	minLen := 8 + 256*4 + 2*hashSize
-	if len(index.data) < minLen {
-		return fmt.Errorf("objectstorer/packed: idx %q too short", index.idxName)
-	}
-
-	if binary.BigEndian.Uint32(index.data[:4]) != idxMagicV2 {
-		return fmt.Errorf("objectstorer/packed: idx %q invalid magic", index.idxName)
-	}
-
-	if binary.BigEndian.Uint32(index.data[4:8]) != idxVersionV2 {
-		return fmt.Errorf("objectstorer/packed: idx %q unsupported version", index.idxName)
-	}
-
-	prev := uint32(0)
-
-	for i := range 256 {
-		base := 8 + i*4
-
-		cur := binary.BigEndian.Uint32(index.data[base : base+4])
-		if cur < prev {
-			return fmt.Errorf("objectstorer/packed: idx %q has non-monotonic fanout table", index.idxName)
-		}
-
-		index.fanout[i] = cur
-		prev = cur
-	}
-
-	index.numObjects = int(index.fanout[255])
-	if index.numObjects < 0 {
-		return fmt.Errorf("objectstorer/packed: idx %q has invalid object count", index.idxName)
-	}
-
-	namesBytes := index.numObjects * hashSize
-	crcBytes := index.numObjects * 4
-	offset32Bytes := index.numObjects * 4
-
-	minSize := 8 + 256*4 + namesBytes + crcBytes + offset32Bytes + 2*hashSize
-	if minSize < 0 || len(index.data) < minSize {
-		return fmt.Errorf("objectstorer/packed: idx %q has truncated tables", index.idxName)
-	}
-
-	index.namesOffset = 8 + 256*4
-	index.offset32Offset = index.namesOffset + namesBytes + crcBytes
-	index.offset64Offset = index.offset32Offset + offset32Bytes
-
-	offset64Bytes := len(index.data) - index.offset64Offset - 2*hashSize
-	if offset64Bytes < 0 || offset64Bytes%8 != 0 {
-		return fmt.Errorf("objectstorer/packed: idx %q has malformed 64-bit offset table", index.idxName)
-	}
-
-	index.offset64Count = offset64Bytes / 8
-
-	maxOffset64Count := max(index.numObjects-1, 0)
-	if index.offset64Count > maxOffset64Count {
-		return fmt.Errorf("objectstorer/packed: idx %q has oversized 64-bit offset table", index.idxName)
-	}
-
-	return nil
-}
diff --git a/object/storer/packed/location.go b/object/storer/packed/location.go
deleted file mode 100644
index 82d17c17..00000000
--- a/object/storer/packed/location.go
+++ /dev/null
@@ -1,7 +0,0 @@
-package packed
-
-// location identifies one object entry in a specific pack file.
-type location struct {
-	packName string
-	offset   uint64
-}
diff --git a/object/storer/packed/new.go b/object/storer/packed/new.go
deleted file mode 100644
index cbfc9383..00000000
--- a/object/storer/packed/new.go
+++ /dev/null
@@ -1,31 +0,0 @@
-package packed
-
-import (
-	"fmt"
-	"os"
-
-	objectid "codeberg.org/lindenii/furgit/object/id"
-)
-
-// New creates a packed-object store rooted at an objects/pack directory.
-func New(root *os.Root, algo objectid.Algorithm, opts Options) (*Store, error) {
-	if algo.Size() == 0 {
-		return nil, objectid.ErrInvalidAlgorithm
-	}
-
-	switch opts.RefreshPolicy {
-	case RefreshPolicyOnMissing, RefreshPolicyNever:
-	default:
-		return nil, fmt.Errorf("objectstorer/packed: invalid refresh policy %d", opts.RefreshPolicy)
-	}
-
-	return &Store{
-		root:          root,
-		algo:          algo,
-		refreshPolicy: opts.RefreshPolicy,
-		mruNodeByPack: make(map[string]*packCandidateNode),
-		idxByPack:     make(map[string]*idxFile),
-		packs:         make(map[string]*packFile),
-		deltaCache:    newDeltaCache(defaultDeltaCacheMaxBytes),
-	}, nil
-}
diff --git a/object/storer/packed/options.go b/object/storer/packed/options.go
deleted file mode 100644
index 05cbee30..00000000
--- a/object/storer/packed/options.go
+++ /dev/null
@@ -1,16 +0,0 @@
-package packed
-
-// RefreshPolicy configures when candidate pack/index discovery refreshes.
-type RefreshPolicy uint8
-
-const (
-	// RefreshPolicyOnMissing refreshes candidates once after a lookup miss.
-	RefreshPolicyOnMissing RefreshPolicy = iota
-	// RefreshPolicyNever disables automatic refresh after lookup misses.
-	RefreshPolicyNever
-)
-
-// Options configures a packed object store.
-type Options struct {
-	RefreshPolicy RefreshPolicy
-}
diff --git a/object/storer/packed/pack.go b/object/storer/packed/pack.go
deleted file mode 100644
index dbfcd07e..00000000
--- a/object/storer/packed/pack.go
+++ /dev/null
@@ -1,82 +0,0 @@
-package packed
-
-import (
-	"encoding/binary"
-	"fmt"
-	"os"
-	"syscall"
-
-	packfmt "codeberg.org/lindenii/furgit/format/packfile"
-	"codeberg.org/lindenii/furgit/internal/intconv"
-)
-
-// packFile stores one mapped and validated .pack file.
-type packFile struct {
-	// name is the .pack basename.
-	name string
-	// file is the opened pack file descriptor.
-	file *os.File
-	// data is the mapped pack bytes.
-	data []byte
-}
-
-// openPackFile maps and validates one pack file.
-func openPackFile(name string, file *os.File, size int64) (*packFile, error) {
-	if size < 12 {
-		return nil, fmt.Errorf("objectstorer/packed: pack %q too short", name)
-	}
-
-	if size > int64(int(^uint(0)>>1)) {
-		return nil, fmt.Errorf("objectstorer/packed: pack %q has unsupported size", name)
-	}
-
-	fd, err := intconv.UintptrToInt(file.Fd())
-	if err != nil {
-		return nil, err
-	}
-
-	data, err := syscall.Mmap(fd, 0, int(size), syscall.PROT_READ, syscall.MAP_PRIVATE)
-	if err != nil {
-		return nil, err
-	}
-
-	if binary.BigEndian.Uint32(data[:4]) != packfmt.Signature {
-		_ = syscall.Munmap(data)
-
-		return nil, fmt.Errorf("objectstorer/packed: pack %q invalid signature", name)
-	}
-
-	version := binary.BigEndian.Uint32(data[4:8])
-	if !packfmt.VersionSupported(version) {
-		_ = syscall.Munmap(data)
-
-		return nil, fmt.Errorf("objectstorer/packed: pack %q unsupported version %d", name, version)
-	}
-
-	return &packFile{name: name, file: file, data: data}, nil
-}
-
-// close unmaps and closes one pack handle.
-func (pack *packFile) close() error {
-	var closeErr error
-
-	if pack.data != nil {
-		err := syscall.Munmap(pack.data)
-		if err != nil && closeErr == nil {
-			closeErr = err
-		}
-
-		pack.data = nil
-	}
-
-	if pack.file != nil {
-		err := pack.file.Close()
-		if err != nil && closeErr == nil {
-			closeErr = err
-		}
-
-		pack.file = nil
-	}
-
-	return closeErr
-}
diff --git a/object/storer/packed/pack_idx_checksum.go b/object/storer/packed/pack_idx_checksum.go
deleted file mode 100644
index 81fd75ec..00000000
--- a/object/storer/packed/pack_idx_checksum.go
+++ /dev/null
@@ -1,34 +0,0 @@
-package packed
-
-import (
-	"bytes"
-	"fmt"
-
-	objectid "codeberg.org/lindenii/furgit/object/id"
-)
-
-// verifyMappedPackMatchesMappedIdx compares one mapped pack trailer hash with
-// the pack hash recorded in one mapped idx trailer.
-func verifyMappedPackMatchesMappedIdx(packData, idxData []byte, algo objectid.Algorithm) error {
-	hashSize := algo.Size()
-	if hashSize <= 0 {
-		return objectid.ErrInvalidAlgorithm
-	}
-
-	if len(packData) < hashSize {
-		return fmt.Errorf("objectstorer/packed: pack too short for trailer hash")
-	}
-
-	if len(idxData) < hashSize*2 {
-		return fmt.Errorf("objectstorer/packed: idx too short for trailer hashes")
-	}
-
-	packTrailerHash := packData[len(packData)-hashSize:]
-
-	idxPackHash := idxData[len(idxData)-hashSize*2 : len(idxData)-hashSize]
-	if !bytes.Equal(packTrailerHash, idxPackHash) {
-		return fmt.Errorf("objectstorer/packed: pack hash does not match idx")
-	}
-
-	return nil
-}
diff --git a/object/storer/packed/read_bytes.go b/object/storer/packed/read_bytes.go
deleted file mode 100644
index 6ed0585d..00000000
--- a/object/storer/packed/read_bytes.go
+++ /dev/null
@@ -1,38 +0,0 @@
-package packed
-
-import (
-	"fmt"
-
-	objectheader "codeberg.org/lindenii/furgit/object/header"
-	objectid "codeberg.org/lindenii/furgit/object/id"
-	objecttype "codeberg.org/lindenii/furgit/object/type"
-)
-
-// ReadBytesContent reads an object's type and content bytes.
-func (store *Store) ReadBytesContent(id objectid.ObjectID) (objecttype.Type, []byte, error) {
-	loc, err := store.lookup(id)
-	if err != nil {
-		return objecttype.TypeInvalid, nil, err
-	}
-
-	return store.deltaResolveContent(loc)
-}
-
-// ReadBytesFull reads a full serialized object as "type size\0content".
-func (store *Store) ReadBytesFull(id objectid.ObjectID) ([]byte, error) {
-	ty, content, err := store.ReadBytesContent(id)
-	if err != nil {
-		return nil, err
-	}
-
-	header, ok := objectheader.Encode(ty, int64(len(content)))
-	if !ok {
-		return nil, fmt.Errorf("objectstorer/packed: failed to encode object header for type %d", ty)
-	}
-
-	out := make([]byte, len(header)+len(content))
-	copy(out, header)
-	copy(out[len(header):], content)
-
-	return out, nil
-}
diff --git a/object/storer/packed/read_closer.go b/object/storer/packed/read_closer.go
deleted file mode 100644
index c317d002..00000000
--- a/object/storer/packed/read_closer.go
+++ /dev/null
@@ -1,19 +0,0 @@
-package packed
-
-import "io"
-
-// readCloser proxies reads and closes one underlying closer.
-type readCloser struct {
-	reader io.Reader
-	closer io.Closer
-}
-
-// Read proxies reads to the underlying reader.
-func (reader *readCloser) Read(dst []byte) (int, error) {
-	return reader.reader.Read(dst)
-}
-
-// Close closes the underlying closer.
-func (reader *readCloser) Close() error {
-	return reader.closer.Close()
-}
diff --git a/object/storer/packed/read_header.go b/object/storer/packed/read_header.go
deleted file mode 100644
index d774de7c..00000000
--- a/object/storer/packed/read_header.go
+++ /dev/null
@@ -1,20 +0,0 @@
-package packed
-
-import (
-	objectid "codeberg.org/lindenii/furgit/object/id"
-	objecttype "codeberg.org/lindenii/furgit/object/type"
-)
-
-// ReadHeader reads an object's type and declared content size.
-//
-// It resolves header metadata only. It does not verify that the full pack entry
-// payload is readable and does not verify any zlib Adler-32 trailer for
-// compressed entry data.
-func (store *Store) ReadHeader(id objectid.ObjectID) (objecttype.Type, int64, error) {
-	loc, err := store.lookup(id)
-	if err != nil {
-		return objecttype.TypeInvalid, 0, err
-	}
-
-	return store.resolveHeaderAt(loc)
-}
diff --git a/object/storer/packed/read_header_resolve.go b/object/storer/packed/read_header_resolve.go
deleted file mode 100644
index 9c2d37e2..00000000
--- a/object/storer/packed/read_header_resolve.go
+++ /dev/null
@@ -1,66 +0,0 @@
-package packed
-
-import (
-	"fmt"
-
-	packfmt "codeberg.org/lindenii/furgit/format/packfile"
-	objecttype "codeberg.org/lindenii/furgit/object/type"
-)
-
-// resolveHeaderAt resolves one object's canonical type and declared content size.
-func (store *Store) resolveHeaderAt(start location) (objecttype.Type, int64, error) {
-	visited := make(map[location]struct{})
-	current := start
-	declaredSize := int64(-1)
-
-	for {
-		if _, ok := visited[current]; ok {
-			return objecttype.TypeInvalid, 0, fmt.Errorf("objectstorer/packed: delta cycle while resolving object header")
-		}
-
-		visited[current] = struct{}{}
-
-		pack, meta, err := store.entryMetaAt(current)
-		if err != nil {
-			return objecttype.TypeInvalid, 0, err
-		}
-
-		if declaredSize < 0 {
-			if packfmt.IsBaseObjectType(meta.ty) {
-				declaredSize = meta.size
-			} else {
-				size, err := deltaDeclaredSizeAt(pack, meta.dataOffset)
-				if err != nil {
-					return objecttype.TypeInvalid, 0, err
-				}
-
-				declaredSize = size
-			}
-		}
-
-		if packfmt.IsBaseObjectType(meta.ty) {
-			return meta.ty, declaredSize, nil
-		}
-
-		switch meta.ty {
-		case objecttype.TypeRefDelta:
-			next, err := store.lookup(meta.baseRefID)
-			if err != nil {
-				return objecttype.TypeInvalid, 0, err
-			}
-
-			current = next
-		case objecttype.TypeOfsDelta:
-			current = location{
-				packName: current.packName,
-				offset:   meta.baseOfs,
-			}
-		case objecttype.TypeCommit, objecttype.TypeTree, objecttype.TypeBlob, objecttype.TypeTag:
-			return objecttype.TypeInvalid, 0, fmt.Errorf("objectstorer/packed: internal invariant violation for base type %d", meta.ty)
-		case objecttype.TypeInvalid, objecttype.TypeFuture:
-			return objecttype.TypeInvalid, 0, fmt.Errorf("objectstorer/packed: unsupported pack type %d", meta.ty)
-		default:
-			return objecttype.TypeInvalid, 0, fmt.Errorf("objectstorer/packed: unsupported pack type %d", meta.ty)
-		}
-	}
-}
diff --git a/object/storer/packed/read_reader.go b/object/storer/packed/read_reader.go
deleted file mode 100644
index 6b2dee73..00000000
--- a/object/storer/packed/read_reader.go
+++ /dev/null
@@ -1,103 +0,0 @@
-package packed
-
-import (
-	"bytes"
-	"fmt"
-	"io"
-
-	packfmt "codeberg.org/lindenii/furgit/format/packfile"
-	"codeberg.org/lindenii/furgit/internal/iolimit"
-	objectheader "codeberg.org/lindenii/furgit/object/header"
-	objectid "codeberg.org/lindenii/furgit/object/id"
-	objecttype "codeberg.org/lindenii/furgit/object/type"
-)
-
-// ReadReaderContent reads an object's type, declared content size, and content
-// stream.
-//
-// The caller must close the returned reader.
-//
-// For base pack entries, the returned reader borrows store-owned mapped pack
-// data and is only valid until the store is closed.
-//
-// Close releases reader-local resources only. It does not drain unread data for
-// additional validation. In particular, malformed trailing compressed data,
-// trailing bytes past the declared object size, and the zlib Adler-32 trailer
-// may go unverified unless the caller reads to io.EOF.
-func (store *Store) ReadReaderContent(id objectid.ObjectID) (objecttype.Type, int64, io.ReadCloser, error) {
-	loc, err := store.lookup(id)
-	if err != nil {
-		return objecttype.TypeInvalid, 0, nil, err
-	}
-
-	pack, meta, err := store.entryMetaAt(loc)
-	if err != nil {
-		return objecttype.TypeInvalid, 0, nil, err
-	}
-
-	if packfmt.IsBaseObjectType(meta.ty) {
-		zr, err := zlibReaderAt(pack, meta.dataOffset)
-		if err != nil {
-			return objecttype.TypeInvalid, 0, nil, err
-		}
-
-		return meta.ty, meta.size, &readCloser{
-			reader: iolimit.ExpectLengthReader(zr, meta.size),
-			closer: zr,
-		}, nil
-	}
-
-	ty, content, err := store.deltaResolveContent(loc)
-	if err != nil {
-		return objecttype.TypeInvalid, 0, nil, err
-	}
-
-	return ty, int64(len(content)), io.NopCloser(bytes.NewReader(content)), nil
-}
-
-// ReadReaderFull reads a full serialized object stream as "type size\0content".
-//
-// The caller must close the returned reader.
-//
-// For base pack entries, the returned reader borrows store-owned mapped pack
-// data and is only valid until the store is closed.
-//
-// Close releases reader-local resources only. It does not drain unread data for
-// additional validation. In particular, malformed trailing compressed data,
-// trailing bytes past the declared object size, and the zlib Adler-32 trailer
-// may go unverified unless the caller reads to io.EOF.
-func (store *Store) ReadReaderFull(id objectid.ObjectID) (io.ReadCloser, error) {
-	loc, err := store.lookup(id)
-	if err != nil {
-		return nil, err
-	}
-
-	pack, meta, err := store.entryMetaAt(loc)
-	if err != nil {
-		return nil, err
-	}
-
-	if packfmt.IsBaseObjectType(meta.ty) {
-		header, ok := objectheader.Encode(meta.ty, meta.size)
-		if !ok {
-			return nil, fmt.Errorf("objectstorer/packed: failed to encode object header for type %d", meta.ty)
-		}
-
-		zr, err := zlibReaderAt(pack, meta.dataOffset)
-		if err != nil {
-			return nil, err
-		}
-
-		return &readCloser{
-			reader: io.MultiReader(bytes.NewReader(header), iolimit.ExpectLengthReader(zr, meta.size)),
-			closer: zr,
-		}, nil
-	}
-
-	raw, err := store.ReadBytesFull(id)
-	if err != nil {
-		return nil, err
-	}
-
-	return io.NopCloser(bytes.NewReader(raw)), nil
-}
diff --git a/object/storer/packed/read_size.go b/object/storer/packed/read_size.go
deleted file mode 100644
index f6a3bca4..00000000
--- a/object/storer/packed/read_size.go
+++ /dev/null
@@ -1,46 +0,0 @@
-package packed
-
-import (
-	"fmt"
-
-	packfmt "codeberg.org/lindenii/furgit/format/packfile"
-	objectid "codeberg.org/lindenii/furgit/object/id"
-	objecttype "codeberg.org/lindenii/furgit/object/type"
-)
-
-// ReadSize reads an object's declared content size.
-//
-// Like ReadHeader, it resolves header metadata only. It does not verify that
-// the full pack entry payload is readable and does not verify any zlib
-// Adler-32 trailer for compressed entry data.
-func (store *Store) ReadSize(id objectid.ObjectID) (int64, error) {
-	loc, err := store.lookup(id)
-	if err != nil {
-		return 0, err
-	}
-
-	return store.resolveSizeAt(loc)
-}
-
-// resolveSizeAt resolves one object's declared content size from location.
-func (store *Store) resolveSizeAt(start location) (int64, error) {
-	pack, meta, err := store.entryMetaAt(start)
-	if err != nil {
-		return 0, err
-	}
-
-	if packfmt.IsBaseObjectType(meta.ty) {
-		return meta.size, nil
-	}
-
-	switch meta.ty {
-	case objecttype.TypeRefDelta, objecttype.TypeOfsDelta:
-		return deltaDeclaredSizeAt(pack, meta.dataOffset)
-	case objecttype.TypeInvalid, objecttype.TypeFuture:
-		return 0, fmt.Errorf("objectstorer/packed: unsupported pack type %d", meta.ty)
-	case objecttype.TypeCommit, objecttype.TypeTree, objecttype.TypeBlob, objecttype.TypeTag:
-		return 0, fmt.Errorf("objectstorer/packed: internal invariant violation for base type %d", meta.ty)
-	default:
-		return 0, fmt.Errorf("objectstorer/packed: unsupported pack type %d", meta.ty)
-	}
-}
diff --git a/object/storer/packed/read_test.go b/object/storer/packed/read_test.go
deleted file mode 100644
index 841019fe..00000000
--- a/object/storer/packed/read_test.go
+++ /dev/null
@@ -1,301 +0,0 @@
-package packed_test
-
-import (
-	"bytes"
-	"errors"
-	"fmt"
-	"io/fs"
-	"strconv"
-	"strings"
-	"testing"
-
-	"codeberg.org/lindenii/furgit/internal/testgit"
-	objectid "codeberg.org/lindenii/furgit/object/id"
-	objectstorer "codeberg.org/lindenii/furgit/object/storer"
-	"codeberg.org/lindenii/furgit/object/storer/packed"
-)
-
-func TestPackedStoreReadAgainstGit(t *testing.T) {
-	t.Parallel()
-	testgit.ForEachAlgorithm(t, func(t *testing.T, algo objectid.Algorithm) { //nolint:thelper
-		testRepo, ids := createPackedFixtureRepo(t, algo)
-		store := openPackedStore(t, testRepo, algo)
-
-		for _, id := range ids {
-			t.Run(id.String(), func(t *testing.T) {
-				wantType, wantBody, wantRaw := expectedRawObject(t, testRepo, id)
-
-				gotHeaderType, gotHeaderSize, err := store.ReadHeader(id)
-				if err != nil {
-					t.Fatalf("ReadHeader: %v", err)
-				}
-
-				if gotHeaderType != wantType {
-					t.Fatalf("ReadHeader type = %v, want %v", gotHeaderType, wantType)
-				}
-
-				if gotHeaderSize != int64(len(wantBody)) {
-					t.Fatalf("ReadHeader size = %d, want %d", gotHeaderSize, len(wantBody))
-				}
-
-				gotSize, err := store.ReadSize(id)
-				if err != nil {
-					t.Fatalf("ReadSize: %v", err)
-				}
-
-				if gotSize != int64(len(wantBody)) {
-					t.Fatalf("ReadSize = %d, want %d", gotSize, len(wantBody))
-				}
-
-				gotRaw, err := store.ReadBytesFull(id)
-				if err != nil {
-					t.Fatalf("ReadBytesFull: %v", err)
-				}
-
-				if !bytes.Equal(gotRaw, wantRaw) {
-					t.Fatalf("ReadBytesFull mismatch")
-				}
-
-				gotType, gotBody, err := store.ReadBytesContent(id)
-				if err != nil {
-					t.Fatalf("ReadBytesContent: %v", err)
-				}
-
-				if gotType != wantType {
-					t.Fatalf("ReadBytesContent type = %v, want %v", gotType, wantType)
-				}
-
-				if !bytes.Equal(gotBody, wantBody) {
-					t.Fatalf("ReadBytesContent mismatch")
-				}
-
-				fullReader, err := store.ReadReaderFull(id)
-				if err != nil {
-					t.Fatalf("ReadReaderFull: %v", err)
-				}
-
-				got := mustReadAllAndClose(t, fullReader)
-				if !bytes.Equal(got, wantRaw) {
-					t.Fatalf("ReadReaderFull mismatch")
-				}
-
-				contentType, contentSize, contentReader, err := store.ReadReaderContent(id)
-				if err != nil {
-					t.Fatalf("ReadReaderContent: %v", err)
-				}
-
-				if contentType != wantType {
-					t.Fatalf("ReadReaderContent type = %v, want %v", contentType, wantType)
-				}
-
-				if contentSize != int64(len(wantBody)) {
-					t.Fatalf("ReadReaderContent size = %d, want %d", contentSize, len(wantBody))
-				}
-
-				got = mustReadAllAndClose(t, contentReader)
-				if !bytes.Equal(got, wantBody) {
-					t.Fatalf("ReadReaderContent mismatch")
-				}
-			})
-		}
-	})
-}
-
-func TestPackedStoreErrors(t *testing.T) {
-	t.Parallel()
-	testgit.ForEachAlgorithm(t, func(t *testing.T, algo objectid.Algorithm) { //nolint:thelper
-		testRepo, _ := createPackedFixtureRepo(t, algo)
-		store := openPackedStore(t, testRepo, algo)
-
-		notFoundID, err := objectid.ParseHex(algo, strings.Repeat("0", algo.HexLen()))
-		if err != nil {
-			t.Fatalf("ParseHex(notFound): %v", err)
-		}
-
-		_, err = store.ReadBytesFull(notFoundID)
-		if !errors.Is(err, objectstorer.ErrObjectNotFound) {
-			t.Fatalf("ReadBytesFull not-found error = %v", err)
-		}
-
-		_, _, err = store.ReadBytesContent(notFoundID)
-		if !errors.Is(err, objectstorer.ErrObjectNotFound) {
-			t.Fatalf("ReadBytesContent not-found error = %v", err)
-		}
-
-		_, err = store.ReadReaderFull(notFoundID)
-		if !errors.Is(err, objectstorer.ErrObjectNotFound) {
-			t.Fatalf("ReadReaderFull not-found error = %v", err)
-		}
-
-		_, _, _, err = store.ReadReaderContent(notFoundID)
-		if !errors.Is(err, objectstorer.ErrObjectNotFound) {
-			t.Fatalf("ReadReaderContent not-found error = %v", err)
-		}
-
-		_, _, err = store.ReadHeader(notFoundID)
-		if !errors.Is(err, objectstorer.ErrObjectNotFound) {
-			t.Fatalf("ReadHeader not-found error = %v", err)
-		}
-
-		_, err = store.ReadSize(notFoundID)
-		if !errors.Is(err, objectstorer.ErrObjectNotFound) {
-			t.Fatalf("ReadSize not-found error = %v", err)
-		}
-
-		var otherAlgo objectid.Algorithm
-
-		for _, candidate := range objectid.SupportedAlgorithms() {
-			if candidate != algo {
-				otherAlgo = candidate
-
-				break
-			}
-		}
-
-		if otherAlgo != objectid.AlgorithmUnknown {
-			mismatchID, err := objectid.ParseHex(otherAlgo, strings.Repeat("0", otherAlgo.HexLen()))
-			if err != nil {
-				t.Fatalf("ParseHex(mismatch): %v", err)
-			}
-
-			_, err = store.ReadBytesFull(mismatchID)
-			if err == nil || !strings.Contains(err.Error(), "algorithm mismatch") {
-				t.Fatalf("ReadBytesFull algorithm-mismatch error = %v", err)
-			}
-		}
-	})
-}
-
-func TestPackedStoreNewValidation(t *testing.T) {
-	t.Parallel()
-	testgit.ForEachAlgorithm(t, func(t *testing.T, algo objectid.Algorithm) { //nolint:thelper
-		testRepo, _ := createPackedFixtureRepo(t, algo)
-
-		store := openPackedStore(t, testRepo, algo)
-
-		err := store.Close()
-		if err != nil {
-			t.Fatalf("Close: %v", err)
-		}
-	})
-}
-
-func TestPackedStoreInvalidAlgorithm(t *testing.T) {
-	t.Parallel()
-	testRepo := testgit.NewRepo(t, testgit.RepoOptions{ObjectFormat: objectid.AlgorithmSHA1, Bare: true})
-
-	root := testRepo.OpenPackRoot(t)
-
-	_, err := packed.New(root, objectid.AlgorithmUnknown, packed.Options{})
-	if !errors.Is(err, objectid.ErrInvalidAlgorithm) {
-		t.Fatalf("packed.New invalid algorithm error = %v", err)
-	}
-}
-
-func TestPackedStoreReadHeaderUsesResolvedObjectSizeForDelta(t *testing.T) {
-	t.Parallel()
-	testgit.ForEachAlgorithm(t, func(t *testing.T, algo objectid.Algorithm) { //nolint:thelper
-		testRepo := testgit.NewRepo(t, testgit.RepoOptions{ObjectFormat: algo, Bare: true})
-
-		var parent objectid.ObjectID
-
-		for i := range 96 {
-			content := strings.Repeat("common-line-"+strconv.Itoa(i%7)+"\n", 384) + fmt.Sprintf("tail-%03d\n", i)
-
-			_, treeID := testRepo.MakeSingleFileTree(t, "file.txt", []byte(content))
-			if i == 0 {
-				parent = testRepo.CommitTree(t, treeID, "delta-header-size-0")
-
-				continue
-			}
-
-			parent = testRepo.CommitTree(t, treeID, fmt.Sprintf("delta-header-size-%03d", i), parent)
-		}
-
-		testRepo.UpdateRef(t, "refs/heads/main", parent)
-		testRepo.Repack(t, "-a", "-d", "-f", "--window=128", "--depth=128")
-
-		deltaID, wantResolvedSize := findDeltaObjectWithResolvedSizeMismatch(t, testRepo, algo)
-		store := openPackedStore(t, testRepo, algo)
-
-		_, gotSize, err := store.ReadHeader(deltaID)
-		if err != nil {
-			t.Fatalf("ReadHeader(%s): %v", deltaID, err)
-		}
-
-		if gotSize != wantResolvedSize {
-			t.Fatalf("ReadHeader(%s) size = %d, want resolved size %d", deltaID, gotSize, wantResolvedSize)
-		}
-
-		gotReadSize, err := store.ReadSize(deltaID)
-		if err != nil {
-			t.Fatalf("ReadSize(%s): %v", deltaID, err)
-		}
-
-		if gotReadSize != wantResolvedSize {
-			t.Fatalf("ReadSize(%s) = %d, want resolved size %d", deltaID, gotReadSize, wantResolvedSize)
-		}
-	})
-}
-
-func findDeltaObjectWithResolvedSizeMismatch(t *testing.T, testRepo *testgit.TestRepo, algo objectid.Algorithm) (objectid.ObjectID, int64) {
-	t.Helper()
-
-	packRoot := testRepo.OpenPackRoot(t)
-
-	entries, err := fs.ReadDir(packRoot.FS(), ".")
-	if err != nil {
-		t.Fatalf("ReadDir(pack): %v", err)
-	}
-
-	var idxName string
-
-	for _, entry := range entries {
-		if strings.HasSuffix(entry.Name(), ".idx") {
-			idxName = entry.Name()
-
-			break
-		}
-	}
-
-	if idxName == "" {
-		t.Fatalf("no idx files found")
-	}
-
-	verifyOut := testRepo.Run(t, "verify-pack", "-v", "objects/pack/"+idxName)
-	for line := range strings.SplitSeq(strings.TrimSpace(verifyOut), "\n") {
-		fields := strings.Fields(line)
-		if len(fields) < 7 {
-			continue
-		}
-
-		idHex := fields[0]
-
-		deltaStreamSize, err := strconv.ParseInt(fields[2], 10, 64)
-		if err != nil {
-			continue
-		}
-
-		resolvedSizeStr := testRepo.Run(t, "cat-file", "-s", idHex)
-
-		resolvedSize, err := strconv.ParseInt(strings.TrimSpace(resolvedSizeStr), 10, 64)
-		if err != nil {
-			t.Fatalf("parse cat-file size for %s: %v", idHex, err)
-		}
-
-		if deltaStreamSize == resolvedSize {
-			continue
-		}
-
-		id, err := objectid.ParseHex(algo, idHex)
-		if err != nil {
-			t.Fatalf("ParseHex(%s): %v", idHex, err)
-		}
-
-		return id, resolvedSize
-	}
-
-	t.Fatalf("did not find a delta object with mismatched stream/resolved size")
-
-	return objectid.ObjectID{}, 0
-}
diff --git a/object/storer/packed/store.go b/object/storer/packed/store.go
deleted file mode 100644
index 99556d32..00000000
--- a/object/storer/packed/store.go
+++ /dev/null
@@ -1,51 +0,0 @@
-// Package packed provides packfile reading and associated indexes.
-package packed
-
-import (
-	"os"
-	"sync"
-	"sync/atomic"
-
-	objectid "codeberg.org/lindenii/furgit/object/id"
-	objectstorer "codeberg.org/lindenii/furgit/object/storer"
-)
-
-// Store reads Git objects from pack/index files under an objects/pack root.
-//
-// Store borrows its root. Cached pack/index mappings are retained until Close.
-type Store struct {
-	// root is the borrowed objects/pack capability used for all file access.
-	root *os.Root
-	// algo is the expected object ID algorithm for lookups.
-	algo objectid.Algorithm
-	// refreshPolicy controls automatic candidate refresh on lookup misses.
-	refreshPolicy RefreshPolicy
-
-	// candidates stores the latest immutable candidate snapshot.
-	candidates atomic.Pointer[candidateSnapshot]
-	// refreshMu serializes candidate refresh.
-	refreshMu sync.Mutex
-	// mruMu guards candidate MRU linked-list state.
-	mruMu sync.RWMutex
-	// mruHead is the first pack in MRU order.
-	mruHead *packCandidateNode
-	// mruTail is the last pack in MRU order.
-	mruTail *packCandidateNode
-	// mruNodeByPack maps pack basename to MRU node.
-	mruNodeByPack map[string]*packCandidateNode
-	// idxByPack caches opened and parsed indexes by pack basename.
-	idxByPack map[string]*idxFile
-
-	// stateMu guards pack cache and close state.
-	stateMu sync.RWMutex
-	// idxMu guards parsed index cache.
-	idxMu sync.RWMutex
-	// cacheMu guards delta cache operations.
-	cacheMu sync.RWMutex
-	// packs caches opened .pack handles by basename.
-	packs map[string]*packFile
-	// deltaCache caches resolved base objects by pack location.
-	deltaCache *deltaCache
-}
-
-var _ objectstorer.Store = (*Store)(nil)
diff --git a/object/storer/packed/store_lookup.go b/object/storer/packed/store_lookup.go
deleted file mode 100644
index accb2d25..00000000
--- a/object/storer/packed/store_lookup.go
+++ /dev/null
@@ -1,106 +0,0 @@
-package packed
-
-import (
-	"errors"
-
-	objectid "codeberg.org/lindenii/furgit/object/id"
-	objectstorer "codeberg.org/lindenii/furgit/object/storer"
-)
-
-// lookup resolves one object ID to its pack location.
-func (store *Store) lookup(id objectid.ObjectID) (location, error) {
-	var zero location
-	if id.Algorithm() != store.algo {
-		return zero, errors.New("objectstorer/packed: object id algorithm mismatch")
-	}
-
-	snapshot, err := store.ensureCandidates()
-	if err != nil {
-		return zero, err
-	}
-
-	loc, ok, err := store.lookupInCandidates(id, snapshot)
-	if err != nil {
-		return zero, err
-	}
-
-	if ok {
-		return loc, nil
-	}
-
-	if store.refreshPolicy == RefreshPolicyOnMissing { //nolint:nestif
-		err = store.Refresh()
-		if err != nil {
-			return zero, err
-		}
-
-		refreshed := store.candidates.Load()
-		if refreshed != nil && refreshed != snapshot {
-			loc, ok, err = store.lookupInCandidates(id, refreshed)
-			if err != nil {
-				return zero, err
-			}
-
-			if ok {
-				return loc, nil
-			}
-		}
-	}
-
-	return zero, objectstorer.ErrObjectNotFound
-}
-
-func (store *Store) lookupInCandidates(
-	id objectid.ObjectID,
-	snapshot *candidateSnapshot,
-) (location, bool, error) {
-	var zero location
-
-	nextPackName := store.firstCandidatePackName(snapshot)
-	for nextPackName != "" {
-		candidate, ok := snapshot.candidateByPack[nextPackName]
-		if !ok {
-			nextPackName = store.firstCandidatePackName(snapshot)
-
-			continue
-		}
-
-		nextPackName = store.nextCandidatePackName(candidate.packName, snapshot)
-
-		index, err := store.openIndex(candidate)
-		if err != nil {
-			return zero, false, err
-		}
-
-		offset, ok, err := index.lookup(id)
-		if err != nil {
-			return zero, false, err
-		}
-
-		if ok {
-			store.touchCandidate(candidate.packName)
-
-			return location{packName: index.packName, offset: offset}, true, nil
-		}
-	}
-
-	for _, candidate := range snapshot.candidates {
-		index, err := store.openIndex(candidate)
-		if err != nil {
-			return zero, false, err
-		}
-
-		offset, ok, err := index.lookup(id)
-		if err != nil {
-			return zero, false, err
-		}
-
-		if ok {
-			store.touchCandidate(candidate.packName)
-
-			return location{packName: index.packName, offset: offset}, true, nil
-		}
-	}
-
-	return zero, false, nil
-}
diff --git a/object/storer/packed/store_open_pack.go b/object/storer/packed/store_open_pack.go
deleted file mode 100644
index c621e08c..00000000
--- a/object/storer/packed/store_open_pack.go
+++ /dev/null
@@ -1,57 +0,0 @@
-package packed
-
-// openPack returns one opened and validated pack handle.
-func (store *Store) openPack(name string) (*packFile, error) {
-	store.stateMu.RLock()
-
-	pack, ok := store.packs[name]
-	if ok {
-		store.stateMu.RUnlock()
-
-		return pack, nil
-	}
-
-	store.stateMu.RUnlock()
-
-	file, err := store.root.Open(name)
-	if err != nil {
-		return nil, err
-	}
-
-	info, err := file.Stat()
-	if err != nil {
-		_ = file.Close()
-
-		return nil, err
-	}
-
-	pack, err = openPackFile(name, file, info.Size())
-	if err != nil {
-		_ = file.Close()
-
-		return nil, err
-	}
-
-	err = store.verifyPackMatchesIndexes(pack)
-	if err != nil {
-		_ = pack.close()
-
-		return nil, err
-	}
-
-	store.stateMu.Lock()
-
-	existing, ok := store.packs[name]
-	if ok {
-		store.stateMu.Unlock()
-
-		_ = pack.close()
-
-		return existing, nil
-	}
-
-	store.packs[name] = pack
-	store.stateMu.Unlock()
-
-	return pack, nil
-}
diff --git a/object/storer/packed/trailer_match.go b/object/storer/packed/trailer_match.go
deleted file mode 100644
index baf9316a..00000000
--- a/object/storer/packed/trailer_match.go
+++ /dev/null
@@ -1,29 +0,0 @@
-package packed
-
-import "fmt"
-
-// verifyPackMatchesIndexes checks that one opened pack's trailer hash matches
-// every loaded index that references the same pack name.
-func (store *Store) verifyPackMatchesIndexes(pack *packFile) error {
-	snapshot, err := store.ensureCandidates()
-	if err != nil {
-		return err
-	}
-
-	candidate, ok := snapshot.candidateByPack[pack.name]
-	if !ok {
-		return fmt.Errorf("objectstorer/packed: missing index for pack %q", pack.name)
-	}
-
-	index, err := store.openIndex(candidate)
-	if err != nil {
-		return err
-	}
-
-	err = verifyMappedPackMatchesMappedIdx(pack.data, index.data, store.algo)
-	if err != nil {
-		return fmt.Errorf("objectstorer/packed: pack %q does not match idx %q: %w", pack.name, index.idxName, err)
-	}
-
-	return nil
-}