diff --git a/pkg/core/contract.go b/pkg/core/contract.go
index 8e74b0c..cab7fa0 100644
--- a/pkg/core/contract.go
+++ b/pkg/core/contract.go
@@ -8,8 +8,6 @@ import (
 	"context"
 	"embed"
 	"fmt"
-	"io/fs"
-	"path/filepath"
 	"reflect"
 	"strings"
 )
@@ -188,32 +186,6 @@ func WithAssets(efs embed.FS) Option {
 	}
 }
 
-// WithIO sandboxes filesystem I/O to a root path.
-func WithIO(root string) Option {
-	return func(c *Core) error {
-		abs, err := filepath.Abs(root)
-		if err != nil {
-			return E("core.WithIO", "failed to create IO at "+root, err)
-		}
-		if resolved, err := filepath.EvalSymlinks(abs); err == nil {
-			abs = resolved
-		}
-		c.fs = &Fs{root: abs}
-		return nil
-	}
-}
-
-// WithMount mounts an fs.FS at a specific subdirectory.
-func WithMount(fsys fs.FS, basedir string) Option {
-	return func(c *Core) error {
-		sub, err := Mount(fsys, basedir)
-		if err != nil {
-			return E("core.WithMount", "failed to mount "+basedir, err)
-		}
-		c.emb = sub
-		return nil
-	}
-}
 
 // WithServiceLock prevents service registration after initialisation.
 func WithServiceLock() Option {
diff --git a/pkg/core/core.go b/pkg/core/core.go
index a54b6f6..ad5aa4d 100644
--- a/pkg/core/core.go
+++ b/pkg/core/core.go
@@ -46,12 +46,10 @@ func (c *Core) Core() *Core     { return c }
 
 // --- IPC (uppercase aliases) ---
 
-func (c *Core) ACTION(msg Message) error                               { return c.Action(msg) }
-func (c *Core) RegisterAction(handler func(*Core, Message) error)      { c.RegisterAction(handler) }
-func (c *Core) RegisterActions(handlers ...func(*Core, Message) error) { c.RegisterActions(handlers...) }
-func (c *Core) QUERY(q Query) (any, bool, error)                       { return c.Query(q) }
-func (c *Core) QUERYALL(q Query) ([]any, error)                        { return c.QueryAll(q) }
-func (c *Core) PERFORM(t Task) (any, bool, error)                      { return c.Perform(t) }
+func (c *Core) ACTION(msg Message) error              { return c.Action(msg) }
+func (c *Core) QUERY(q Query) (any, bool, error)      { return c.Query(q) }
+func (c *Core) QUERYALL(q Query) ([]any, error)       { return c.QueryAll(q) }
+func (c *Core) PERFORM(t Task) (any, bool, error)     { return c.Perform(t) }
 
 // --- Error+Log ---
 
diff --git a/pkg/core/task.go b/pkg/core/task.go
index cc6e308..5420d8b 100644
--- a/pkg/core/task.go
+++ b/pkg/core/task.go
@@ -56,6 +56,18 @@ func (c *Core) Perform(t Task) (any, bool, error) {
 	return nil, false, nil
 }
 
+func (c *Core) RegisterAction(handler func(*Core, Message) error) {
+	c.ipc.ipcMu.Lock()
+	c.ipc.ipcHandlers = append(c.ipc.ipcHandlers, handler)
+	c.ipc.ipcMu.Unlock()
+}
+
+func (c *Core) RegisterActions(handlers ...func(*Core, Message) error) {
+	c.ipc.ipcMu.Lock()
+	c.ipc.ipcHandlers = append(c.ipc.ipcHandlers, handlers...)
+	c.ipc.ipcMu.Unlock()
+}
+
 func (c *Core) RegisterTask(handler TaskHandler) {
 	c.ipc.taskMu.Lock()
 	c.ipc.taskHandlers = append(c.ipc.taskHandlers, handler)