diff --git a/internal/p9/batchstore.go b/internal/p9/batchstore.go
deleted file mode 100644
index 20c860c..0000000
--- a/internal/p9/batchstore.go
+++ /dev/null
@@ -1,507 +0,0 @@
-package p9
-
-import (
-	"context"
-	"fmt"
-	"os"
-	"strconv"
-	"strings"
-	"sync"
-
-	"ollie/pkg/agent"
-	"ollie/pkg/backend"
-	"ollie/pkg/tools"
-	"ollie/pkg/tools/execute"
-)
-
-const batchNewTemplate = "name=\ncwd=\nagent=\nbackend=\nmodel=\noutput=\nparallel=1\n---\nWrite your prompt here.\n"
-
-// batchJob holds state for one ephemeral batch agent run.
-type batchJob struct {
-	mu        sync.RWMutex
-	id        string
-	spec      string // verbatim input to b/new
-	prompt    string
-	cwd       string
-	agentName string
-	backend   string
-	model     string
-	output    string
-	state     string // "running" | "done" | "failed: ..."
-	result    string
-	usage     string
-	ctxsz     string
-	log       []byte
-	logVers   uint32
-	cancel    context.CancelFunc
-	done      chan struct{} // closed when state reaches a terminal value
-}
-
-// appendLog appends data to the job's log and bumps the Qid version.
-func (job *batchJob) appendLog(data []byte) {
-	if len(data) == 0 {
-		return
-	}
-	job.mu.Lock()
-	job.log = append(job.log, data...)
-	job.logVers++
-	job.mu.Unlock()
-}
-
-// batchSpec is the parsed result of a b/new write.
-type batchSpec struct {
-	name      string
-	cwd       string
-	agentName string
-	backend   string
-	model     string
-	output    string
-	parallel  int
-	prompt    string
-}
-
-// BatchStore implements Store for the /b/ directory.
-// Entries are job IDs (directories) plus the synthetic files "new" and "idx".
-// Put("new", data) creates jobs; Delete(id) cancels and removes one.
-type BatchStore struct {
-	srv *Server
-	mu  sync.RWMutex
-	jobs map[string]*batchJob
-}
-
-func NewBatchStore(srv *Server) *BatchStore {
-	return &BatchStore{srv: srv, jobs: make(map[string]*batchJob)}
-}
-
-func (s *BatchStore) List() ([]os.DirEntry, error) {
-	entries := []os.DirEntry{
-		syntheticEntry("new", 0666),
-		syntheticEntry("idx", 0444),
-	}
-	s.mu.RLock()
-	for id := range s.jobs {
-		entries = append(entries, syntheticDirEntry(id, 0555))
-	}
-	s.mu.RUnlock()
-	return entries, nil
-}
-
-func (s *BatchStore) Stat(name string) (os.FileInfo, error) {
-	switch name {
-	case "new":
-		return &syntheticFileInfo{Name_: "new", Mode_: 0666, Size_: int64(len(batchNewTemplate))}, nil
-	case "idx":
-		return &syntheticFileInfo{Name_: "idx", Mode_: 0444, Size_: int64(len(s.index()))}, nil
-	}
-	s.mu.RLock()
-	_, ok := s.jobs[name]
-	s.mu.RUnlock()
-	if ok {
-		return &syntheticFileInfo{Name_: name, Mode_: 0555, IsDir_: true}, nil
-	}
-	return nil, fmt.Errorf("%s: not found", name)
-}
-
-func (s *BatchStore) Get(name string) ([]byte, error) {
-	switch name {
-	case "new":
-		return []byte(batchNewTemplate), nil
-	case "idx":
-		return s.index(), nil
-	}
-	return nil, fmt.Errorf("%s: not a readable file", name)
-}
-
-func (s *BatchStore) Put(name string, data []byte) error {
-	if name != "new" {
-		return fmt.Errorf("%s: not writable", name)
-	}
-	return s.handleNewBatch(strings.TrimSpace(string(data)))
-}
-
-func (s *BatchStore) Delete(name string) error {
-	s.mu.Lock()
-	job, ok := s.jobs[name]
-	if ok {
-		delete(s.jobs, name)
-	}
-	s.mu.Unlock()
-	if !ok {
-		return fmt.Errorf("batch job not found: %s", name)
-	}
-	job.mu.RLock()
-	cancel := job.cancel
-	job.mu.RUnlock()
-	if cancel != nil {
-		cancel()
-	}
-	s.srv.log.Info("removed batch job %s", name)
-	return nil
-}
-
-func (s *BatchStore) Create(name string) error {
-	return fmt.Errorf("create not supported for batch jobs")
-}
-
-func (s *BatchStore) Rename(oldName, newName string) error {
-	return fmt.Errorf("rename not supported for batch jobs")
-}
-
-// Shutdown cancels all running jobs.
-func (s *BatchStore) Shutdown() {
-	s.mu.Lock()
-	ids := make([]string, 0, len(s.jobs))
-	for id := range s.jobs {
-		ids = append(ids, id)
-	}
-	s.mu.Unlock()
-	for _, id := range ids {
-		s.Delete(id) //nolint:errcheck
-	}
-}
-
-// job looks up a job by ID (nil if not found).
-func (s *BatchStore) job(id string) *batchJob {
-	s.mu.RLock()
-	defer s.mu.RUnlock()
-	return s.jobs[id]
-}
-
-// index returns the live b/idx content: id\tstate\tcwd\tagent per line.
-func (s *BatchStore) index() []byte {
-	var sb strings.Builder
-	s.mu.RLock()
-	defer s.mu.RUnlock()
-	for id, job := range s.jobs {
-		job.mu.RLock()
-		fmt.Fprintf(&sb, "%s\t%s\t%s\t%s\n", id, job.state, job.cwd, job.agentName)
-		job.mu.RUnlock()
-	}
-	return []byte(sb.String())
-}
-
-// handleNewBatch parses the spec, creates parallel batchJobs, and starts them.
-func (s *BatchStore) handleNewBatch(input string) error {
-	spec, err := parseBatchSpec(input)
-	if err != nil {
-		return err
-	}
-
-	baseID := spec.name
-	if baseID == "" {
-		baseID = agent.NewSessionID()
-	}
-
-	for i := 0; i < spec.parallel; i++ {
-		id := fmt.Sprintf("%s-%d", baseID, i)
-
-		s.mu.Lock()
-		if _, exists := s.jobs[id]; exists {
-			s.mu.Unlock()
-			return fmt.Errorf("batch job already exists: %s", id)
-		}
-		job := &batchJob{
-			id:        id,
-			spec:      input,
-			prompt:    spec.prompt,
-			cwd:       spec.cwd,
-			agentName: spec.agentName,
-			backend:   spec.backend,
-			model:     spec.model,
-			output:    spec.output,
-			state:     "running",
-			done:      make(chan struct{}),
-		}
-		s.jobs[id] = job
-		s.mu.Unlock()
-
-		ctx, cancel := context.WithCancel(context.Background())
-		job.mu.Lock()
-		job.cancel = cancel
-		job.mu.Unlock()
-
-		go s.runJob(ctx, job)
-	}
-
-	s.srv.log.Info("new batch base=%s parallel=%d", baseID, spec.parallel)
-	return nil
-}
-
-// runJob executes one batch job and updates its state and result.
-func (s *BatchStore) runJob(ctx context.Context, job *batchJob) {
-	result, err := s.executeJob(ctx, job)
-	job.mu.Lock()
-	defer job.mu.Unlock()
-	if err != nil {
-		if ctx.Err() != nil {
-			job.state = "failed: cancelled"
-		} else {
-			job.state = "failed: " + err.Error()
-		}
-		job.result = job.state
-		s.srv.log.Info("batch job %s failed: %v", job.id, err)
-		close(job.done)
-		return
-	}
-	job.result = result
-	job.state = "done"
-	s.srv.log.Info("batch job %s done", job.id)
-	close(job.done)
-}
-
-// executeJob creates an ephemeral agentCore, submits the prompt, and returns
-// the assistant reply. The core is closed before returning.
-func (s *BatchStore) executeJob(ctx context.Context, job *batchJob) (string, error) {
-	job.mu.RLock()
-	backendName := job.backend
-	modelName := job.model
-	agentName := job.agentName
-	cwd := job.cwd
-	prompt := job.prompt
-	output := job.output
-	jobID := job.id
-	job.mu.RUnlock()
-
-	var (
-		be  backend.Backend
-		err error
-	)
-	if backendName != "" {
-		old := os.Getenv("OLLIE_BACKEND")
-		os.Setenv("OLLIE_BACKEND", backendName) //nolint:errcheck
-		be, err = backend.New()
-		os.Setenv("OLLIE_BACKEND", old) //nolint:errcheck
-	} else {
-		be, err = backend.New()
-	}
-	if err != nil {
-		return "", fmt.Errorf("backend: %w", err)
-	}
-	if modelName != "" {
-		be.SetModel(modelName)
-	}
-
-	cfg := loadAgentConfig(s.srv.agentsDir, agentName)
-
-	newDisp := tools.NewDispatcherFunc(map[string]func() tools.Server{
-		"execute": execute.Decl(cwd),
-	})
-	env := agent.BuildAgentEnv(cfg, newDisp(), cwd)
-
-	core := agent.NewAgentCore(agent.AgentCoreConfig{
-		Backend:       be,
-		AgentName:     agentName,
-		AgentsDir:     s.srv.agentsDir,
-		SessionsDir:   "", // ephemeral: no persistence
-		SessionID:     jobID,
-		CWD:           cwd,
-		Env:           env,
-		NewDispatcher: newDisp,
-		Log:           s.srv.sink.NewLogger("core"),
-	})
-	defer core.Close()
-
-	if output == "json" {
-		prompt += "\n\nRespond with valid JSON only, no prose."
-	}
-
-	var replyBuf, errBuf strings.Builder
-	assistantStarted := false
-	core.Submit(ctx, prompt, func(ev agent.Event) {
-		switch ev.Role {
-		case "assistant":
-			replyBuf.WriteString(ev.Content)
-			if !assistantStarted {
-				job.appendLog([]byte("assistant: "))
-				assistantStarted = true
-			}
-		case "user", "call", "tool":
-			assistantStarted = false
-		case "error":
-			errBuf.WriteString(ev.Content)
-		}
-		job.appendLog(formatEvent(ev))
-	})
-
-	usage := core.Usage()
-	ctxsz := core.CtxSz()
-
-	job.mu.Lock()
-	job.usage = usage
-	job.ctxsz = ctxsz
-	job.mu.Unlock()
-
-	if ctx.Err() != nil {
-		return "", ctx.Err()
-	}
-	if errBuf.Len() > 0 {
-		return "", fmt.Errorf("%s", strings.TrimSpace(errBuf.String()))
-	}
-	return replyBuf.String(), nil
-}
-
-// parseBatchSpec splits input on the first \n---\n, parses key=value headers
-// above it, and treats everything below as the prompt body.
-func parseBatchSpec(input string) (batchSpec, error) {
-	spec := batchSpec{
-		agentName: "default",
-		parallel:  1,
-	}
-
-	const sep = "\n---\n"
-	idx := strings.Index(input, sep)
-	if idx < 0 {
-		return spec, fmt.Errorf("missing --- delimiter between headers and prompt")
-	}
-
-	for _, line := range strings.Split(input[:idx], "\n") {
-		line = strings.TrimSpace(line)
-		if line == "" {
-			continue
-		}
-		k, v, ok := strings.Cut(line, "=")
-		if !ok {
-			continue
-		}
-		k = strings.TrimSpace(k)
-		v = strings.TrimSpace(v)
-		if v == "" {
-			continue
-		}
-		switch k {
-		case "name":
-			spec.name = v
-		case "cwd":
-			spec.cwd = v
-		case "agent":
-			spec.agentName = v
-		case "backend":
-			spec.backend = v
-		case "model":
-			spec.model = v
-		case "output":
-			spec.output = v
-		case "parallel":
-			if n, err := strconv.Atoi(v); err == nil && n > 0 {
-				spec.parallel = n
-			}
-		}
-	}
-
-	spec.prompt = strings.TrimSpace(input[idx+len(sep):])
-
-	if spec.cwd == "" {
-		return spec, fmt.Errorf("cwd is required")
-	}
-	if spec.prompt == "" {
-		return spec, fmt.Errorf("prompt is required")
-	}
-	return spec, nil
-}
-
-// ---------------------------------------------------------------------------
-// BatchJobStore — per-job file access, mirrors SessionFileStore.
-// ---------------------------------------------------------------------------
-
-var batchJobFiles = []struct {
-	name string
-	mode os.FileMode
-}{
-	{"spec",      0444},
-	{"state",     0444},
-	{"statewait", 0444},
-	{"result",    0444},
-	{"usage",     0444},
-	{"ctxsz",     0444},
-	{"log",       0444},
-}
-
-// BatchJobStore provides Stat/List/Get for the files within a single batch job
-// directory (/b/{id}/*). The file set is fixed.
-type BatchJobStore struct {
-	job *batchJob
-}
-
-func (s *BatchStore) JobStore(id string) (*BatchJobStore, bool) {
-	job := s.job(id)
-	if job == nil {
-		return nil, false
-	}
-	return &BatchJobStore{job: job}, true
-}
-
-func (js *BatchJobStore) List() ([]os.DirEntry, error) {
-	entries := make([]os.DirEntry, len(batchJobFiles))
-	for i, f := range batchJobFiles {
-		entries[i] = syntheticEntry(f.name, f.mode)
-	}
-	return entries, nil
-}
-
-func (js *BatchJobStore) Stat(name string) (os.FileInfo, error) {
-	for _, f := range batchJobFiles {
-		if f.name == name {
-			var size int64
-			if name == "log" {
-				js.job.mu.RLock()
-				size = int64(len(js.job.log))
-				js.job.mu.RUnlock()
-			} else {
-				size = int64(len(js.content(name)))
-			}
-			return &syntheticFileInfo{Name_: name, Mode_: f.mode, Size_: size}, nil
-		}
-	}
-	return nil, fmt.Errorf("%s: not found", name)
-}
-
-func (js *BatchJobStore) Get(name string) ([]byte, error) {
-	if name == "log" {
-		js.job.mu.RLock()
-		data := make([]byte, len(js.job.log))
-		copy(data, js.job.log)
-		js.job.mu.RUnlock()
-		return data, nil
-	}
-	for _, f := range batchJobFiles {
-		if f.name == name {
-			return []byte(js.content(name)), nil
-		}
-	}
-	return nil, fmt.Errorf("%s: not found", name)
-}
-
-func (js *BatchJobStore) content(name string) string {
-	js.job.mu.RLock()
-	defer js.job.mu.RUnlock()
-	switch name {
-	case "spec":
-		return js.job.spec
-	case "state":
-		return js.job.state + "\n"
-	case "result":
-		return js.job.result
-	case "usage":
-		return js.job.usage + "\n"
-	case "ctxsz":
-		return js.job.ctxsz + "\n"
-	}
-	return ""
-}
-
-// Wait blocks until the job reaches a terminal state, then returns it.
-// Returns nil content (empty read) on context cancellation.
-func (js *BatchJobStore) Wait(ctx context.Context, name, _ string) ([]byte, error) {
-	if name != "statewait" {
-		return nil, fmt.Errorf("%s: not a wait file", name)
-	}
-	select {
-	case <-ctx.Done():
-		return nil, nil
-	case <-js.job.done:
-	}
-	js.job.mu.RLock()
-	state := js.job.state
-	js.job.mu.RUnlock()
-	return []byte(state + "\n"), nil
-}
diff --git a/internal/p9/server.go b/internal/p9/server.go
index a04ef07..ee0cebe 100644
--- a/internal/p9/server.go
+++ b/internal/p9/server.go
@@ -48,6 +48,7 @@ import (
 	"ollie/pkg/backend"
 	olog "ollie/pkg/log"
 	"ollie/pkg/paths"
+	"ollie/pkg/store"
 	"ollie/pkg/tools"
 	"ollie/pkg/tools/execute"
 
@@ -150,7 +151,11 @@ func New(sink *olog.Sink) *Server {
 		tmpStore:        NewFlatDirStore(tmpDir, 0600),
 	}
 	s.sessionStore = &SessionStore{srv: s}
-	s.batchStore = NewBatchStore(s)
+	s.batchStore = store.NewBatchStore(store.BatchStoreConfig{
+		AgentsDir: agentsDir,
+		Log:       s.log,
+		Sink:      s.sink,
+	})
 	return s
 }
 
@@ -1238,7 +1243,7 @@ func (s *Server) createSession(args []string) error {
 		return fmt.Errorf("sessions dir: %w", err)
 	}
 
-	cfg := loadAgentConfig(s.agentsDir, agentName)
+	cfg := store.LoadAgentConfig(s.agentsDir, agentName)
 
 	newDisp := tools.NewDispatcherFunc(map[string]func() tools.Server{
 		"execute": execute.Decl(cwd),
@@ -1324,40 +1329,6 @@ func (s *Server) killSession(id string) {
 	}
 }
 
-// formatEvent converts an agent Event to bytes for appending to the chat log.
-// Output matches ollie-tui's MakeOutputFn so the chat file looks identical to
-// what appears in the TUI chat pane.
-func formatEvent(ev agent.Event) []byte {
-	switch ev.Role {
-	case "user":
-		return []byte("user: " + ev.Content + "\n")
-	case "assistant":
-		return []byte(ev.Content)
-	case "call":
-		args := squashWhitespace(ev.Content)
-		if len(args) > 500 {
-			args = args[:500] + "..."
-		}
-		return []byte("-> " + ev.Name + "(" + args + ")\n")
-	case "tool":
-		return []byte(strings.TrimRight(ev.Content, "\n") + "\n")
-	case "retry":
-		return []byte("retrying in " + ev.Content + "s...\n")
-	case "error":
-		return []byte("error: " + ev.Content + "\n")
-	case "stalled":
-		return []byte("agent stalled\n")
-	case "info":
-		return []byte(ev.Content)
-	default:
-		return nil
-	}
-}
-
-func squashWhitespace(s string) string {
-	return strings.Join(strings.Fields(s), " ")
-}
-
 // readDir serializes directory entries for the given path, respecting offset and count.
 func (s *Server) readDir(path string, offset uint64, count uint32) []byte {
 	var dirs []plan9.Dir
@@ -1635,10 +1606,9 @@ func (s *Server) makeStat(path string) plan9.Dir {
 		if len(parts) == 3 && parts[0] == "b" {
 			if js, ok := s.batchStore.JobStore(parts[1]); ok {
 				if base == "log" {
-					js.job.mu.RLock()
-					dir.Length = uint64(len(js.job.log))
-					dir.Qid.Vers = js.job.logVers
-					js.job.mu.RUnlock()
+					length, vers := js.LogInfo()
+					dir.Length = uint64(length)
+					dir.Qid.Vers = vers
 				}
 			}
 		}
diff --git a/internal/p9/sessionfilestore.go b/internal/p9/sessionfilestore.go
index 75913ff..b8dcd02 100644
--- a/internal/p9/sessionfilestore.go
+++ b/internal/p9/sessionfilestore.go
@@ -10,6 +10,7 @@ import (
 	"ollie/pkg/agent"
 	"ollie/pkg/backend"
 	olog "ollie/pkg/log"
+	"ollie/pkg/store"
 )
 
 // sessionFileList defines the fixed set of files in a session directory,
@@ -332,7 +333,7 @@ func (s *SessionFileStore) makePublish() func(agent.Event) {
 				assistantStarted = true
 			}
 		}
-		s.sess.appendChat(formatEvent(ev))
+		s.sess.appendChat(store.FormatEvent(ev))
 		if ev.Role == "user" {
 			s.sess.mu.Lock()
 			s.sess.chatOffset = len(s.sess.chatLog)
diff --git a/internal/p9/store.go b/internal/p9/store.go
index 0acc9a3..4550fec 100644
--- a/internal/p9/store.go
+++ b/internal/p9/store.go
@@ -5,7 +5,6 @@ import (
 	"os"
 	"strings"
 
-	"ollie/pkg/config"
 	"ollie/pkg/paths"
 	"ollie/pkg/store"
 	"ollie/pkg/tools/execute"
@@ -20,6 +19,8 @@ type (
 	Store          = store.Store
 	FlatDirStore   = store.FlatDir
 	SkillStore     = store.SkillStore
+	BatchStore     = store.BatchStore
+	BatchJobStore  = store.BatchJobStore
 
 	syntheticFileInfo = store.SyntheticFileInfo
 )
@@ -40,21 +41,6 @@ func syntheticDirEntry(name string, mode os.FileMode) os.DirEntry {
 	return store.DirEntry(name, mode)
 }
 
-// --- config ---
-
-// loadAgentConfig resolves and loads the config for a named agent.
-// 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(agentsDir + "/" + name + ".json")
-	if err != nil {
-		return nil
-	}
-	defer f.Close()
-	cfg, _ := config.Load(f)
-	return cfg
-}
-
 // --- util ---
 
 // UtilStore is a FlatDirStore backed by the scripts/u/ directory.