115 lines
3.5 KiB
Go
115 lines
3.5 KiB
Go
// SPDX-License-Identifier: EUPL-1.2
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package agentic
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import (
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"context"
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"fmt"
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"os"
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"path/filepath"
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coreio "forge.lthn.ai/core/go-io"
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coreerr "forge.lthn.ai/core/go-log"
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"github.com/modelcontextprotocol/go-sdk/mcp"
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)
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// ResumeInput is the input for agentic_resume.
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type ResumeInput struct {
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Workspace string `json:"workspace"` // workspace name (e.g. "go-scm-1773581173")
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Answer string `json:"answer,omitempty"` // answer to the blocked question (written to ANSWER.md)
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Agent string `json:"agent,omitempty"` // override agent type (default: same as original)
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DryRun bool `json:"dry_run,omitempty"` // preview without executing
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}
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// ResumeOutput is the output for agentic_resume.
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type ResumeOutput struct {
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Success bool `json:"success"`
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Workspace string `json:"workspace"`
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Agent string `json:"agent"`
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PID int `json:"pid,omitempty"`
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OutputFile string `json:"output_file,omitempty"`
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Prompt string `json:"prompt,omitempty"`
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}
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func (s *PrepSubsystem) registerResumeTool(server *mcp.Server) {
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mcp.AddTool(server, &mcp.Tool{
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Name: "agentic_resume",
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Description: "Resume a blocked agent workspace. Writes ANSWER.md if an answer is provided, then relaunches the agent with instructions to read it and continue.",
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}, s.resume)
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}
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func (s *PrepSubsystem) resume(ctx context.Context, _ *mcp.CallToolRequest, input ResumeInput) (*mcp.CallToolResult, ResumeOutput, error) {
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if input.Workspace == "" {
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return nil, ResumeOutput{}, coreerr.E("resume", "workspace is required", nil)
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}
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wsDir := filepath.Join(WorkspaceRoot(), input.Workspace)
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srcDir := filepath.Join(wsDir, "src")
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// Verify workspace exists
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if _, err := os.Stat(srcDir); err != nil {
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return nil, ResumeOutput{}, coreerr.E("resume", "workspace not found: "+input.Workspace, nil)
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}
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// Read current status
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st, err := readStatus(wsDir)
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if err != nil {
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return nil, ResumeOutput{}, coreerr.E("resume", "no status.json in workspace", err)
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}
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if st.Status != "blocked" && st.Status != "failed" && st.Status != "completed" {
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return nil, ResumeOutput{}, coreerr.E("resume", "workspace is "+st.Status+", not resumable (must be blocked, failed, or completed)", nil)
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}
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// Determine agent
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agent := st.Agent
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if input.Agent != "" {
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agent = input.Agent
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}
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// Write ANSWER.md if answer provided
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if input.Answer != "" {
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answerPath := filepath.Join(srcDir, "ANSWER.md")
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content := fmt.Sprintf("# Answer\n\n%s\n", input.Answer)
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if err := coreio.Local.Write(answerPath, content); err != nil {
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return nil, ResumeOutput{}, coreerr.E("resume", "failed to write ANSWER.md", err)
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}
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}
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// Build resume prompt
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prompt := "You are resuming previous work in this workspace. "
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if input.Answer != "" {
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prompt += "Read ANSWER.md for the response to your question. "
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}
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prompt += "Read PROMPT.md for the original task. Read BLOCKED.md to see what you were stuck on. Continue working."
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if input.DryRun {
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return nil, ResumeOutput{
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Success: true,
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Workspace: input.Workspace,
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Agent: agent,
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Prompt: prompt,
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}, nil
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}
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// Spawn agent via go-process
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pid, _, err := s.spawnAgent(agent, prompt, wsDir, srcDir)
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if err != nil {
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return nil, ResumeOutput{}, err
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}
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// Update status
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st.Status = "running"
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st.PID = pid
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st.Runs++
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st.Question = ""
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writeStatus(wsDir, st)
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return nil, ResumeOutput{
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Success: true,
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Workspace: input.Workspace,
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Agent: agent,
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PID: pid,
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OutputFile: filepath.Join(wsDir, fmt.Sprintf("agent-%s.log", agent)),
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}, nil
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}
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