feat(agentci): add model/runner fields for multi-backend support

Tickets now carry model (sonnet/haiku/opus) and runner (claude/codex)
fields. agent-runner.sh dispatches to the right backend. Defaults to
claude with sonnet model for cost efficiency.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

pkg/agentci/config.go

@@ -13,6 +13,8 @@ type AgentConfig struct {
 	Host        string `yaml:"host" mapstructure:"host"`
 	QueueDir    string `yaml:"queue_dir" mapstructure:"queue_dir"`
 	ForgejoUser string `yaml:"forgejo_user" mapstructure:"forgejo_user"`
+	Model       string `yaml:"model" mapstructure:"model"`   // claude model: sonnet, haiku, opus (default: sonnet)
+	Runner      string `yaml:"runner" mapstructure:"runner"` // runner binary: claude, codex (default: claude)
 	Active      bool   `yaml:"active" mapstructure:"active"`
 }
 
@@ -37,9 +39,19 @@ func LoadAgents(cfg *config.Config) (map[string]handlers.AgentTarget, error) {
 		if queueDir == "" {
 			queueDir = "/home/claude/ai-work/queue"
 		}
+		model := ac.Model
+		if model == "" {
+			model = "sonnet"
+		}
+		runner := ac.Runner
+		if runner == "" {
+			runner = "claude"
+		}
 		targets[name] = handlers.AgentTarget{
 			Host:     ac.Host,
 			QueueDir: queueDir,
+			Model:    model,
+			Runner:   runner,
 		}
 	}
 
@@ -49,12 +61,19 @@ func LoadAgents(cfg *config.Config) (map[string]handlers.AgentTarget, error) {
 // SaveAgent writes an agent config entry to the config file.
 func SaveAgent(cfg *config.Config, name string, ac AgentConfig) error {
 	key := fmt.Sprintf("agentci.agents.%s", name)
-	return cfg.Set(key, map[string]any{
+	data := map[string]any{
 		"host":         ac.Host,
 		"queue_dir":    ac.QueueDir,
 		"forgejo_user": ac.ForgejoUser,
 		"active":       ac.Active,
-	})
+	}
+	if ac.Model != "" {
+		data["model"] = ac.Model
+	}
+	if ac.Runner != "" {
+		data["runner"] = ac.Runner
+	}
+	return cfg.Set(key, data)
 }
 
 // RemoveAgent removes an agent from the config file.

pkg/jobrunner/handlers/dispatch.go

@@ -18,6 +18,8 @@ import (
 type AgentTarget struct {
 	Host     string // SSH destination (e.g., "claude@192.168.0.201")
 	QueueDir string // Remote queue directory (e.g., "~/ai-work/queue")
+	Model    string // AI model: sonnet, haiku, opus (default: sonnet)
+	Runner   string // Runner binary: claude, codex (default: claude)
 }
 
 // DispatchTicket is the JSON payload written to the agent's queue.
@@ -33,6 +35,8 @@ type DispatchTicket struct {
 	ForgeURL     string `json:"forge_url"`
 	ForgeToken   string `json:"forge_token"`
 	ForgeUser    string `json:"forgejo_user"`
+	Model        string `json:"model,omitempty"`
+	Runner       string `json:"runner,omitempty"`
 	CreatedAt    string `json:"created_at"`
 }
 
@@ -93,6 +97,8 @@ func (h *DispatchHandler) Execute(ctx context.Context, signal *jobrunner.Pipelin
 		ForgeURL:     h.forgeURL,
 		ForgeToken:   h.token,
 		ForgeUser:    signal.Assignee,
+		Model:        agent.Model,
+		Runner:       agent.Runner,
 		CreatedAt:    time.Now().UTC().Format(time.RFC3339),
 	}
 

scripts/agent-runner.sh

@@ -101,15 +101,30 @@ The repo is cloned at the current directory on branch '${TARGET_BRANCH}'.
 Create a feature branch from '${TARGET_BRANCH}', make minimal targeted changes, commit referencing #${ISSUE_NUM}, and push.
 Then create a PR targeting '${TARGET_BRANCH}' using the forgejo MCP tools or git push."
 
-# --- 9. Run Claude ---
+# --- 9. Run AI agent ---
+MODEL=$(jq -r '.model // "sonnet"' "$TICKET_FILE")
+RUNNER=$(jq -r '.runner // "claude"' "$TICKET_FILE")
 LOG_FILE="$LOG_DIR/${REPO_OWNER}-${REPO_NAME}-${ISSUE_NUM}.log"
-echo "$(date -Iseconds) Running claude..."
+
+echo "$(date -Iseconds) Running ${RUNNER} (model: ${MODEL})..."
+
+case "$RUNNER" in
+    codex)
+        codex --approval-mode full-auto \
+            --quiet \
+            "$PROMPT" \
+            > "$LOG_FILE" 2>&1
+        ;;
+    *)
         echo "$PROMPT" | claude -p \
+            --model "$MODEL" \
             --dangerously-skip-permissions \
             --output-format text \
             > "$LOG_FILE" 2>&1
+        ;;
+esac
 EXIT_CODE=$?
-echo "$(date -Iseconds) Claude exited with code: $EXIT_CODE"
+echo "$(date -Iseconds) ${RUNNER} exited with code: $EXIT_CODE"
 
 # --- 10. Move to done ---
 mv "$TICKET_FILE" "$DONE_DIR/"