Add federation worker and canonical handoffs

internal/continuity/continuity.go

@@ -11,6 +11,7 @@ import (
 	"os"
 	"os/exec"
 	"path/filepath"
+	"regexp"
 	"strings"
 	"time"
 )
@@ -36,6 +37,9 @@ func RenderTaskFile(t domain.Task) []byte {
 	if t.Parent != "" {
 		fmt.Fprintf(&b, "- Parent: %s\n", t.Parent)
 	}
+	if strings.TrimSpace(t.Description) != "" {
+		fmt.Fprintf(&b, "\n## Instructions\n\n%s\n", t.Description)
+	}
 	b.WriteString("\nThis file is immutable for the lifetime of the task (§6.2) — its hash is\ncarried in every handoff and re-verified on every pickup. Do not edit it.\n")
 	return []byte(b.String())
 }
@@ -99,21 +103,14 @@ type Meta struct {
 	RotationIndex int    `json:"rotation_index"`
 }
 type Handoff struct {
-	Meta          Meta        `json:"meta"`
-	Anchor        Anchor      `json:"anchor"`
-	Goal          string      `json:"goal"`
-	DoneWhen      []string    `json:"done_when"`
-	Completed     []Completed `json:"completed"`
-	Remaining     []string    `json:"remaining"`
-	Action        string      `json:"action"`
-	Command       string      `json:"command"`
-	Files         []string    `json:"files"`
-	Invariants    []string    `json:"invariants"`
-	DeadEnds      []DeadEnd   `json:"dead_ends"`
-	OpenQuestions []string    `json:"open_questions"`
-	Build         string      `json:"build"`
-	Test          string      `json:"test"`
-	LastResult    Result      `json:"last_result"`
+	Meta          Meta      `json:"meta"`
+	Anchor        Anchor    `json:"anchor"`
+	Remaining     []string  `json:"remaining"`
+	Action        string    `json:"action"`
+	Command       string    `json:"command"`
+	DeadEnds      []DeadEnd `json:"dead_ends"`
+	OpenQuestions []string  `json:"open_questions"`
+	Learned       []string  `json:"learned"`
 }
 type Result struct {
 	Command  string `json:"command"`
@@ -123,13 +120,32 @@ type Result struct {
 
 var reasons = map[string]bool{"threshold": true, "milestone": true, "thrash": true, "manual": true}
 
+const maxAuthoredLine = 200
+
+var circularAction = regexp.MustCompile(`(?i)handoff|report\.md|^continue the task`)
+var circularCommand = regexp.MustCompile(`(?i)\.orchestra-handoff|handoff-report|report\.md`)
+
 func (h Handoff) Validate() error {
 	if strings.TrimSpace(h.Meta.ID) == "" || !reasons[h.Meta.Reason] || h.Meta.RotationIndex < 0 {
 		return errors.New("invalid handoff meta")
 	}
-	if len(h.Anchor.GitSHA) != 40 || h.Anchor.Branch == "" || strings.TrimSpace(h.Goal) == "" || len(h.DoneWhen) == 0 || strings.TrimSpace(h.Action) == "" || strings.TrimSpace(h.Command) == "" {
+	if len(h.Anchor.GitSHA) != 40 || h.Anchor.Branch == "" || strings.TrimSpace(h.Action) == "" {
 		return errors.New("invalid handoff required fields")
 	}
+	if circularAction.MatchString(h.Action) {
+		return errors.New("invalid handoff action: must name concrete next work, not a handoff")
+	}
+	if err := validateAuthoredLine(h.Action); err != nil {
+		return err
+	}
+	if circularCommand.MatchString(h.Command) {
+		return errors.New("invalid handoff command: must not point to a handoff or report")
+	}
+	for _, item := range append(append([]string{}, h.Remaining...), append(h.OpenQuestions, h.Learned...)...) {
+		if err := validateAuthoredLine(item); err != nil {
+			return err
+		}
+	}
 	for _, d := range h.Anchor.Dirty {
 		if filepath.IsAbs(d.Path) || d.Path == "" || len(d.SHA256) != 64 {
 			return errors.New("invalid dirty anchor")
@@ -139,6 +155,22 @@ func (h Handoff) Validate() error {
 		if strings.TrimSpace(d.Tried) == "" || strings.TrimSpace(d.WhyFailed) == "" {
 			return errors.New("invalid dead end")
 		}
+		if err := validateAuthoredLine(d.Tried); err != nil {
+			return err
+		}
+		if err := validateAuthoredLine(d.WhyFailed); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func validateAuthoredLine(s string) error {
+	if strings.TrimSpace(s) == "" {
+		return errors.New("invalid handoff authored field: empty item")
+	}
+	if strings.Contains(s, "\n#") || len(s) > maxAuthoredLine {
+		return errors.New("invalid handoff authored field: prose smuggled into list")
 	}
 	return nil
 }