Implement fleet topology epidemiology tracker and strain plague map.

Adds epidemiology package, auth epidemiology_fix push, strain-based 3D map, and Vitest coverage.

server/internal/ai/seer_memory.go

@@ -0,0 +1,110 @@
+package ai
+
+import (
+	"encoding/json"
+	"regexp"
+	"strings"
+)
+
+// SeerBridge supplies persisted notes and streams LLM payloads to The Seer UI.
+type SeerBridge interface {
+	NotesForPrompt(agentID string) string
+	AppendNote(agentID, content, promptHash string) error
+	EmitEvent(agentID, direction string, payload interface{})
+}
+
+// SeerNoteInstruction is appended to the system prompt when Seer memory is active.
+var SeerNoteInstruction string
+
+// SeerToolCatalog documents fleet tool endpoints the model may invoke via tool-call JSON.
+var SeerToolCatalog string
+
+func init() {
+	SeerNoteInstruction = strings.TrimSpace(`
+Seer memory: after your JSON commands block, append exactly one line:
+SEER_NOTE: <one concise sentence summarizing what you learned this turn for future cycles>.
+The server persists SEER_NOTE lines and replays them on the next turn — this is your only cross-turn memory.`)
+
+	SeerToolCatalog = strings.TrimSpace(`
+Available Seer tool endpoints (POST /api/v1/seer/tools/{name}):
+- spread_route: BGP-style minimum-clearance spread routing — body {"session_id","target_subnets":[],"join_lane"}
+- graft_strain: clone winning spread strain onto sibling subnet — body {"source_agent_id","target_subnet","strain"}
+- fork_onion: split LOTL tier chain for A/B recovery — body {"agent_id","tier_order":[],"skip_tiers":[]}
+Stub handlers return {"ok":true,"stub":true} until live orchestration ships.`)
+}
+
+var seerNoteLineRe = regexp.MustCompile(`(?m)^SEER_NOTE:\s*(.+)$`)
+
+// AugmentUserPromptWithNotes prepends replayed Seer notes before the fresh snapshot.
+func AugmentUserPromptWithNotes(basePrompt, notesBlock string) string {
+	notesBlock = strings.TrimSpace(notesBlock)
+	if notesBlock == "" {
+		return basePrompt
+	}
+	var b strings.Builder
+	b.WriteString("Seer notes (server memory — replayed from prior turns):\n")
+	b.WriteString(notesBlock)
+	b.WriteString("\n\n--- current snapshot ---\n")
+	b.WriteString(basePrompt)
+	return b.String()
+}
+
+// FormatSeerNotesBlock renders DB notes for prompt injection.
+func FormatSeerNotesBlock(notes []string) string {
+	if len(notes) == 0 {
+		return ""
+	}
+	var b strings.Builder
+	for i, n := range notes {
+		n = strings.TrimSpace(n)
+		if n == "" {
+			continue
+		}
+		if i > 0 {
+			b.WriteByte('\n')
+		}
+		b.WriteString("- ")
+		b.WriteString(n)
+	}
+	return b.String()
+}
+
+// ExtractSeerNote pulls the SEER_NOTE line from an LLM response.
+func ExtractSeerNote(response string) (note string, ok bool) {
+	m := seerNoteLineRe.FindStringSubmatch(response)
+	if len(m) < 2 {
+		return "", false
+	}
+	note = strings.TrimSpace(m[1])
+	if note == "" {
+		return "", false
+	}
+	if len(note) > 2000 {
+		note = note[:2000]
+	}
+	return note, true
+}
+
+// BuildChatCompletionPayload mirrors the exact OpenAI-compatible body sent to the LLM.
+func BuildChatCompletionPayload(model, systemPrompt, userPrompt string) map[string]interface{} {
+	if strings.TrimSpace(model) == "" {
+		model = "llama3.2"
+	}
+	return map[string]interface{}{
+		"model": model,
+		"messages": []map[string]string{
+			{"role": "system", "content": systemPrompt},
+			{"role": "user", "content": userPrompt},
+		},
+		"stream": false,
+	}
+}
+
+// SeerStreamEvent is one request/response frame for The Seer terminal.
+type SeerStreamEvent struct {
+	ID        int64           `json:"id"`
+	AgentID   string          `json:"agent_id"`
+	Direction string          `json:"direction"`
+	Payload   json.RawMessage `json:"payload"`
+	Ts        string          `json:"ts"`
+}