feat: companion 核心的人設注入、語氣、心情標記與互動記憶

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

plugins/cockpit/companion/interaction.ts

@@ -0,0 +1,63 @@
+import { redactSecrets } from './secrets.ts'
+import type { Fs } from './types.ts'
+
+export type Turn = { role: 'user' | 'assistant'; text: string; at: number }
+export type InteractionMemory = {
+  recent: Turn[]
+  /** 壓縮後的摘要行與累計關係變化 */
+  summary: string[]
+  relationDelta: number
+}
+
+export const RECENT_MAX = 30
+export const COMPRESS_COUNT = 20
+const SUMMARY_MAX = 40
+const LINE_MAX = 60
+
+export const empty = (): InteractionMemory => ({ recent: [], summary: [], relationDelta: 0 })
+
+// 互動記憶不存大段程式碼；只留對話文字
+export function dialogueOnly(text: string): string {
+  return text
+    .replace(/```[\s\S]*?(?:```|$)/g, ' ')
+    .replace(/`[^`\n]{40,}`/g, ' ')
+    .replace(/[ \t]+/g, ' ')
+    .trim()
+}
+
+export function clean(text: string): string {
+  return redactSecrets(dialogueOnly(text))
+}
+
+export function add(m: InteractionMemory, turn: Turn, relationDelta: number): InteractionMemory {
+  const text = clean(turn.text)
+  if (!text) return { ...m, relationDelta: m.relationDelta + relationDelta }
+  let next: InteractionMemory = {
+    ...m,
+    recent: [...m.recent, { ...turn, text }],
+    relationDelta: m.relationDelta + relationDelta,
+  }
+  if (next.recent.length > RECENT_MAX) next = compress(next)
+  return next
+}
+
+/** 把最舊的逐字紀錄壓縮成摘要行 */
+export function compress(m: InteractionMemory): InteractionMemory {
+  const old = m.recent.slice(0, COMPRESS_COUNT)
+  const lines = old
+    .filter(t => t.role === 'user')
+    .map(t => (t.text.length > LINE_MAX ? t.text.slice(0, LINE_MAX) + '…' : t.text))
+  return { ...m, recent: m.recent.slice(COMPRESS_COUNT), summary: [...m.summary, ...lines].slice(-SUMMARY_MAX) }
+}
+
+export async function load(fs: Fs, path: string): Promise<InteractionMemory> {
+  const raw = await fs.read(path)
+  if (!raw) return empty()
+  try {
+    return { ...empty(), ...JSON.parse(raw) }
+  } catch {
+    return empty()
+  }
+}
+
+export const save = (fs: Fs, path: string, m: InteractionMemory) => fs.write(path, JSON.stringify(m))