store: use core pkg/store, re-export types as aliases

Replace local store interfaces and FlatDirStore with type aliases to
ollie/pkg/store. Synthetic dir entry helpers remain 9p-local.

internal/p9/configstore.go

@@ -3,7 +3,6 @@ package p9
 import (
 	"os"
 
-	"ollie/pkg/agent"
 	"ollie/pkg/config"
 )
 
@@ -11,7 +10,7 @@ import (
 // Returns nil (not an error) if the config file does not exist;
 // BuildAgentEnv handles nil configs.
 func loadAgentConfig(agentsDir, name string) *config.Config {
-	f, err := os.Open(agent.AgentConfigPath(agentsDir, name))
+	f, err := os.Open(agentsDir + "/" + name + ".json")
 	if err != nil {
 		return nil
 	}

internal/p9/store.go

@@ -2,10 +2,25 @@ package p9
 
 import (
 	"os"
-	"path/filepath"
 	"time"
+
+	"ollie/pkg/store"
 )
 
+// Re-export core store types so existing 9p code compiles unchanged.
+type (
+	ReadableStore  = store.ReadableStore
+	WritableStore  = store.WritableStore
+	ReadWriteStore = store.ReadWriteStore
+	BlobStore      = store.BlobStore
+	Store          = store.Store
+	FlatDirStore   = store.FlatDir
+)
+
+func NewFlatDirStore(dir string, perm os.FileMode) *FlatDirStore {
+	return store.NewFlatDir(dir, perm)
+}
+
 // syntheticFileInfo implements os.FileInfo for entries with no backing file.
 type syntheticFileInfo struct {
 	name  string
@@ -49,81 +64,3 @@ func syntheticEntry(name string, mode os.FileMode) os.DirEntry {
 func syntheticDirEntry(name string, mode os.FileMode) os.DirEntry {
 	return &syntheticEntryImpl{name: name, mode: mode, isDir: true}
 }
-
-// ReadableStore is a named collection of byte blobs supporting only read operations.
-type ReadableStore interface {
-	Stat(name string) (os.FileInfo, error)
-	List() ([]os.DirEntry, error)
-	Get(name string) ([]byte, error)
-}
-
-// WritableStore supports writing blobs by name.
-type WritableStore interface {
-	Put(name string, data []byte) error
-}
-
-// ReadWriteStore supports reading and writing but not structural mutations.
-type ReadWriteStore interface {
-	ReadableStore
-	WritableStore
-}
-
-// BlobStore extends ReadWriteStore with creation and deletion.
-// Suitable for content-addressed or append-only backing stores.
-type BlobStore interface {
-	ReadWriteStore
-	Delete(name string) error
-	Create(name string) error
-}
-
-// Store is a fully mutable store that also supports renaming entries.
-type Store interface {
-	BlobStore
-	Rename(oldName, newName string) error
-}
-
-// FlatDirStore implements Store backed by a directory on the local filesystem.
-type FlatDirStore struct {
-	dir  string
-	perm os.FileMode
-}
-
-// NewFlatDirStore returns a FlatDirStore rooted at dir.
-// perm is applied to newly created or written files.
-func NewFlatDirStore(dir string, perm os.FileMode) *FlatDirStore {
-	return &FlatDirStore{dir: dir, perm: perm}
-}
-
-func (s *FlatDirStore) Stat(name string) (os.FileInfo, error) {
-	return os.Stat(filepath.Join(s.dir, name))
-}
-
-func (s *FlatDirStore) List() ([]os.DirEntry, error) {
-	return os.ReadDir(s.dir)
-}
-
-func (s *FlatDirStore) Get(name string) ([]byte, error) {
-	return os.ReadFile(filepath.Join(s.dir, name))
-}
-
-func (s *FlatDirStore) Put(name string, data []byte) error {
-	if err := os.MkdirAll(s.dir, 0755); err != nil {
-		return err
-	}
-	return os.WriteFile(filepath.Join(s.dir, name), data, s.perm)
-}
-
-func (s *FlatDirStore) Delete(name string) error {
-	return os.Remove(filepath.Join(s.dir, name))
-}
-
-func (s *FlatDirStore) Create(name string) error {
-	if err := os.MkdirAll(s.dir, 0755); err != nil {
-		return err
-	}
-	return os.WriteFile(filepath.Join(s.dir, name), nil, s.perm)
-}
-
-func (s *FlatDirStore) Rename(oldName, newName string) error {
-	return os.Rename(filepath.Join(s.dir, oldName), filepath.Join(s.dir, newName))
-}