(workflow) add simple harness workflow for manual testing

action/lessons.go

@@ -1,3 +1,97 @@
 package action
 
-// Empty stub - will be filled in later
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"os"
+	"path/filepath"
+)
+
+// Lesson represents a learned lesson from a failed attempt.
+type Lesson struct {
+	Attempt              int    `json:"attempt"`
+	Critique             string `json:"critique"`
+	FailedApproachSummary string `json:"failed_approach_summary"`
+	Timestamp            string `json:"timestamp"`
+}
+
+// ReadLessonsInput is input to ReadLessonsActivity.
+type ReadLessonsInput struct {
+	TargetRepoPath string
+	TaskID         string
+}
+
+// ReadLessonsOutput is the output of ReadLessonsActivity.
+type ReadLessonsOutput struct {
+	Lessons string // JSONL or formatted string of lessons
+}
+
+// ReadLessonsActivity reads lessons for a task.
+func ReadLessonsActivity(ctx context.Context, in ReadLessonsInput) (ReadLessonsOutput, error) {
+	lessonsFile := filepath.Join(in.TargetRepoPath, "tasks", ".orchestrator", "lessons", in.TaskID+".jsonl")
+
+	// If file doesn't exist, return empty lessons
+	if _, err := os.Stat(lessonsFile); os.IsNotExist(err) {
+		return ReadLessonsOutput{Lessons: ""}, nil
+	}
+
+	// Read and format lessons
+	data, err := os.ReadFile(lessonsFile)
+	if err != nil {
+		return ReadLessonsOutput{}, fmt.Errorf("failed to read lessons file: %w", err)
+	}
+
+	// Format lessons as plain text
+	lines := string(data)
+	return ReadLessonsOutput{Lessons: lines}, nil
+}
+
+// UpdateLessonsInput is input to UpdateLessonsActivity.
+type UpdateLessonsInput struct {
+	TargetRepoPath        string
+	TaskID                string
+	Attempt               int
+	Critique              string
+	FailedApproachSummary string
+}
+
+// UpdateLessonsActivity appends a lesson to the lessons file.
+func UpdateLessonsActivity(ctx context.Context, in UpdateLessonsInput) error {
+	lessonsDir := filepath.Join(in.TargetRepoPath, "tasks", ".orchestrator", "lessons")
+
+	// Create directory if it doesn't exist
+	if err := os.MkdirAll(lessonsDir, 0755); err != nil {
+		return fmt.Errorf("failed to create lessons directory: %w", err)
+	}
+
+	lessonsFile := filepath.Join(lessonsDir, in.TaskID+".jsonl")
+
+	// Create lesson entry
+	lesson := map[string]any{
+		"attempt":                in.Attempt,
+		"critique":               in.Critique,
+		"failed_approach_summary": in.FailedApproachSummary,
+		"timestamp":              "",
+	}
+
+	// Marshal to JSON
+	data, err := json.Marshal(lesson)
+	if err != nil {
+		return fmt.Errorf("failed to marshal lesson: %w", err)
+	}
+
+	// Append to file
+	f, err := os.OpenFile(lessonsFile, os.O_CREATE|os.O_APPEND|os.O_WRONLY, 0644)
+	if err != nil {
+		return fmt.Errorf("failed to open lessons file: %w", err)
+	}
+	defer f.Close()
+
+	_, err = f.Write(append(data, '\n'))
+	if err != nil {
+		return fmt.Errorf("failed to write lesson: %w", err)
+	}
+
+	return nil
+}