diff --git a/cmd/olliesrv/internal/fs/spec.go b/cmd/olliesrv/internal/fs/spec.go
index 817d90d..a4a9c7c 100644
--- a/cmd/olliesrv/internal/fs/spec.go
+++ b/cmd/olliesrv/internal/fs/spec.go
@@ -10,6 +10,7 @@ import (
 	"os"
 	"os/exec"
 	"os/user"
+	"sort"
 	"strconv"
 	"strings"
 	"syscall"
@@ -60,9 +61,12 @@ func startAsync(ctx context.Context, fn func()) bool {
 }
 
 // runWorkflow executes a workflow script in the background.
-func runWorkflow(s *session.Session, workflow string) {
+// If variant is non-empty and not "default", the matching conf sidecar is
+// sourced as environment variables before the script runs.
+func runWorkflow(s *session.Session, workflow, variant string) {
 	startAsync(s.Ctx, func() {
-		scriptPath := util.CfgDir() + "/workflows/" + workflow
+		workflowDir := util.CfgDir() + "/workflows/"
+		scriptPath := workflowDir + workflow
 		if _, err := os.Stat(scriptPath); err != nil {
 			s.SetGoalStatus("error: workflow not found: " + workflow)
 			return
@@ -74,6 +78,24 @@ func runWorkflow(s *session.Session, workflow string) {
 			"OLLIE_SESSION_NAME="+s.Name(),
 			"OLLIE_CWD="+cwd,
 		)
+		// Source variant conf if specified.
+		if variant != "" && variant != "default" {
+			confPath := workflowDir + workflow + "-" + variant + ".conf"
+			confData, err := os.ReadFile(confPath)
+			if err != nil {
+				s.SetGoalStatus("error: variant conf not found: " + workflow + "-" + variant + ".conf")
+				return
+			}
+			for _, line := range strings.Split(string(confData), "\n") {
+				line = strings.TrimSpace(line)
+				if line == "" || line[0] == '#' {
+					continue
+				}
+				if _, _, ok := strings.Cut(line, "="); ok {
+					cmd.Env = append(cmd.Env, line)
+				}
+			}
+		}
 		cmd.Dir = cwd
 		out, err := cmd.CombinedOutput()
 		if err != nil {
@@ -146,19 +168,52 @@ func buildTreeSpec(cfg *Config) virtfs.FsNodeDecl {
 			}),
 		),
 		virtfs.FileNode("workflows", 0444,
-			virtfs.Doc("Available workflows, one per line"),
+			virtfs.Doc("Available workflows with variants. Format: name\\tdefault,variant1,variant2"),
 			virtfs.Read(func() ([]byte, error) {
 				dir := util.CfgDir() + "/workflows"
 				entries, err := os.ReadDir(dir)
 				if err != nil {
 					return nil, nil
 				}
-				var sb strings.Builder
+				// Collect executable workflow scripts (no extension).
+				workflows := make(map[string][]string)
 				for _, e := range entries {
 					if e.IsDir() {
 						continue
 					}
-					sb.WriteString(e.Name())
+					name := e.Name()
+					if strings.Contains(name, ".") {
+						continue // skip .conf files
+					}
+					workflows[name] = []string{"default"}
+				}
+				// Find variant confs: {name}-{variant}.conf
+				for _, e := range entries {
+					name := e.Name()
+					if !strings.HasSuffix(name, ".conf") {
+						continue
+					}
+					base := strings.TrimSuffix(name, ".conf")
+					// Find the longest workflow name that is a prefix.
+					for wf := range workflows {
+						if strings.HasPrefix(base, wf+"-") {
+							variant := strings.TrimPrefix(base, wf+"-")
+							if variant != "" {
+								workflows[wf] = append(workflows[wf], variant)
+							}
+						}
+					}
+				}
+				var sb strings.Builder
+				names := make([]string, 0, len(workflows))
+				for wf := range workflows {
+					names = append(names, wf)
+				}
+				sort.Strings(names)
+				for _, wf := range names {
+					sb.WriteString(wf)
+					sb.WriteByte('\t')
+					sb.WriteString(strings.Join(workflows[wf], ","))
 					sb.WriteByte('\n')
 				}
 				return []byte(sb.String()), nil
@@ -256,7 +311,7 @@ func buildTreeSpec(cfg *Config) virtfs.FsNodeDecl {
 				virtfs.Doc("Create session"),
 				virtfs.Rdwr(func(_ context.Context, data []byte) ([]byte, error) {
 					args := strings.Fields(string(data))
-					name, remote, workflow, cwd := "", "", "", ""
+					name, remote, workflow, variant, cwd := "", "", "", "", ""
 					yolo := false
 					for _, arg := range args {
 						if k, v, ok := strings.Cut(arg, "="); ok {
@@ -267,6 +322,8 @@ func buildTreeSpec(cfg *Config) virtfs.FsNodeDecl {
 								remote = v
 							case "workflow":
 								workflow = v
+							case "variant":
+								variant = v
 							case "cwd":
 								cwd = v
 							case "yolo":
@@ -285,6 +342,9 @@ func buildTreeSpec(cfg *Config) virtfs.FsNodeDecl {
 					if workflow != "" {
 						sess.SetWorkflow(workflow)
 					}
+					if variant != "" {
+						sess.SetVariant(variant)
+					}
 					return []byte(sess.Name() + "\n"), nil
 				}),
 			),
@@ -375,7 +435,7 @@ func buildSessionChildren(
 				s.SetGoal(input)
 				// Trigger workflow only if not already running.
 				if status == "" || status == "complete" || status == "blocked" || strings.HasPrefix(status, "error") {
-					runWorkflow(s, s.Workflow())
+					runWorkflow(s, s.Workflow(), s.Variant())
 				}
 				return nil
 			}),
@@ -454,10 +514,14 @@ func buildSessionChildren(
 					},
 					"run": func(args []string) ([]byte, error) {
 						workflow := s.Workflow()
+						variant := s.Variant()
 						if len(args) > 0 {
 							workflow = args[0]
 						}
-						runWorkflow(s, workflow)
+						if len(args) > 1 {
+							variant = args[1]
+						}
+						runWorkflow(s, workflow, variant)
 						return []byte("ok\n"), nil
 					},
 				}, data)
diff --git a/cmd/olliesrv/internal/session/persist.go b/cmd/olliesrv/internal/session/persist.go
index e055bcd..5659551 100644
--- a/cmd/olliesrv/internal/session/persist.go
+++ b/cmd/olliesrv/internal/session/persist.go
@@ -24,6 +24,7 @@ type PersistedSession struct {
 	Yolo       bool             `json:"yolo,omitempty"`
 	Paused     bool             `json:"paused,omitempty"`
 	Workflow   string           `json:"workflow,omitempty"`
+	Variant   string           `json:"variant,omitempty"`
 	Goal       string           `json:"goal,omitempty"`
 	GoalStatus string           `json:"goalStatus,omitempty"`
 	Agents     []PersistedAgent `json:"agents"`
@@ -75,6 +76,7 @@ func PersistSession(name string) error {
 		Yolo:       sess.Yolo,
 		Paused:     sess.IsPaused(),
 		Workflow:   sess.Workflow(),
+		Variant:    sess.Variant(),
 		Goal:       goalText,
 		GoalStatus: goalStatus,
 	}
@@ -206,6 +208,9 @@ func restoreMultiAgentSession(ps *PersistedSession) (*RestoredSession, error) {
 	if ps.Workflow != "" {
 		sess.SetWorkflow(ps.Workflow)
 	}
+	if ps.Variant != "" {
+		sess.SetVariant(ps.Variant)
+	}
 	if ps.Goal != "" {
 		sess.SetGoal(ps.Goal)
 	}
diff --git a/cmd/olliesrv/internal/session/session.go b/cmd/olliesrv/internal/session/session.go
index 662e2bb..34da95c 100644
--- a/cmd/olliesrv/internal/session/session.go
+++ b/cmd/olliesrv/internal/session/session.go
@@ -51,6 +51,7 @@ type Session struct {
 	goalSignalMu sync.Mutex
 	goalSignalCh chan struct{}
 	workflow     string // workflow profile name (default: "conductor")
+	variant     string // workflow variant (empty = "default")
 
 	// Autosave
 	saveMu    sync.Mutex
@@ -274,6 +275,21 @@ func (s *Session) SetWorkflow(w string) {
 	s.mu.Unlock()
 }
 
+// Variant returns the workflow variant name (empty means "default").
+func (s *Session) Variant() string {
+	s.mu.RLock()
+	v := s.variant
+	s.mu.RUnlock()
+	return v
+}
+
+// SetVariant sets the workflow variant name.
+func (s *Session) SetVariant(v string) {
+	s.mu.Lock()
+	s.variant = v
+	s.mu.Unlock()
+}
+
 // FindAgent returns the agent matching the given name or ID, or nil.
 func (s *Session) FindAgent(nameOrID string) *agent.Agent {
 	for _, ag := range s.agents {
diff --git a/data/workflows/review b/data/workflows/review
index 063b7ef..6d80283 100755
--- a/data/workflows/review
+++ b/data/workflows/review
@@ -8,17 +8,19 @@ set -euo pipefail
 SESSION_NAME="$OLLIE_SESSION_NAME"
 CWD="$OLLIE_CWD"
 MAX_ROUNDS=${OLLIE_REFINE_MAX:-3}
+AUTHOR_PROFILE=${AUTHOR_PROFILE:-author}
+REVIEWER_PROFILE=${REVIEWER_PROFILE:-reviewer}
 
 # Set status to running.
 echo "running" | ollie-9p write "session/$SESSION_NAME/goalstatus"
 
 # Create the author agent.
-AUTHOR=$(printf 'profile=author\ncwd=%s\nname=author\n' "$CWD" \
+AUTHOR=$(printf 'profile=%s\ncwd=%s\nname=author\n' "$AUTHOR_PROFILE" "$CWD" \
   | ollie-9p rdwr "session/$SESSION_NAME/agent/new")
 AUTHOR=$(echo "$AUTHOR" | tr -d '\n')
 
 # Create the reviewer agent.
-REVIEWER=$(printf 'profile=reviewer\ncwd=%s\nname=reviewer\n' "$CWD" \
+REVIEWER=$(printf 'profile=%s\ncwd=%s\nname=reviewer\n' "$REVIEWER_PROFILE" "$CWD" \
   | ollie-9p rdwr "session/$SESSION_NAME/agent/new")
 REVIEWER=$(echo "$REVIEWER" | tr -d '\n')
 
diff --git a/data/workflows/review-code.conf b/data/workflows/review-code.conf
new file mode 100644
index 0000000..0fbe1d9
--- /dev/null
+++ b/data/workflows/review-code.conf
@@ -0,0 +1,5 @@
+# Variant: code
+# Optimized for code review cycles — more iterations, code-focused profiles.
+OLLIE_REFINE_MAX=5
+AUTHOR_PROFILE=author
+REVIEWER_PROFILE=reviewer
diff --git a/data/workflows/review-writing.conf b/data/workflows/review-writing.conf
new file mode 100644
index 0000000..0a91344
--- /dev/null
+++ b/data/workflows/review-writing.conf
@@ -0,0 +1,5 @@
+# Variant: writing
+# Optimized for document drafting — fewer iterations, writing-focused profiles.
+OLLIE_REFINE_MAX=3
+AUTHOR_PROFILE=author
+REVIEWER_PROFILE=reviewer