182 lines
6.1 KiB
Go
182 lines
6.1 KiB
Go
package memory
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import (
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"crypto/sha256"
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"encoding/hex"
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"fmt"
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"sort"
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"strings"
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"time"
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)
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// 本文件是记忆整理的**候选**侧:候选与证据的落库形状、由判定结果构造候选、
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// 以及候选的幂等键。它从 tidy.go 拆出来,让编排(扫描→召回→判定→落库)
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// 保持在一屏内(AGENTS §10 文件 ≤500 行)。
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// TidyEvidence 是一条候选的判定证据。design/23 §7 要求 diff 预览能展示
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// 「A 原文 / B 原文 / 合并后内容 / A 被 B 包含的证据 / 命中或未命中的否决规则」,
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// 因此这四项都在这里。它装的是主人自己的记忆正文,只落本机库、只走 owner-only
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// 的读侧(design/23 §11)。
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type TidyEvidence struct {
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// Similarity 是召回用的余弦相似度(只用来召回,不是判定依据)。
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Similarity float64 `json:"similarity"`
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// RecallMode 记录本轮相似度的来源(embedding / lexical),便于运维判读。
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RecallMode string `json:"recall_mode,omitempty"`
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// Containment 是包含判定结论:a_subset_b / b_subset_a / both / none。
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Containment string `json:"containment,omitempty"`
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// ContainmentEvidence 是「A ⊆ B」的逐要素证据(缺哪一项就列哪一项)。
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ContainmentEvidence []string `json:"containment_evidence,omitempty"`
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// VetoReason 是命中的否决规则(未命中时为空)。
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VetoReason string `json:"veto_reason,omitempty"`
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// KindA/KindB/ProposedKind 供 reclassify 候选展示 kind 误分类建议。
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KindA string `json:"kind_a,omitempty"`
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KindB string `json:"kind_b,omitempty"`
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ProposedKind string `json:"proposed_kind,omitempty"`
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// ContentA/ContentB 是两条原文,供面板 diff 预览。
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ContentA string `json:"content_a,omitempty"`
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ContentB string `json:"content_b,omitempty"`
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}
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// TidyCandidate 是一条整理建议(落库形状,design/23 §10)。
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type TidyCandidate struct {
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ID string
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PersonaID string
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Scope Scope
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ProjectID string
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Kind Kind
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Action TidyAction
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SourceIDs []string
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TargetID string
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ProposedContent string
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MergedContent string
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Reason string
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Evidence TidyEvidence
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RuleVersion string
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ScoreMin float64
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ScoreMax float64
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Status string
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IdempotencyKey string
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CreatedAt time.Time
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}
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// tidyVerdict 是一条候选对的判定结果。
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type tidyVerdict struct {
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Action TidyAction
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Veto TidyVetoReason
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Target *MemoryItem
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Containment containment
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Reason string
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}
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// archiveCandidate 为一次性事件产一条归档建议(design/23 §5.1 T0-5)。
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func archiveCandidate(it MemoryItem, now time.Time) TidyCandidate {
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return TidyCandidate{
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ID: mustNewTidyID(),
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PersonaID: it.PersonaID,
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Scope: it.Scope,
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ProjectID: it.ProjectID,
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Kind: it.Kind,
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Action: TidyArchive,
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SourceIDs: []string{it.ID},
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ProposedContent: it.Content,
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Reason: "one_off_event",
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Evidence: TidyEvidence{
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Containment: "none",
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ContentA: it.Content,
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KindA: string(it.Kind),
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},
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RuleVersion: TidyRuleVersion,
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Status: tidyCandidatePending,
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CreatedAt: now,
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}
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}
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// buildCandidates 把一条判定结果转成候选:merge 需要一条存活条目(超集),
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// kind 不一致时附带一条 reclassify 建议(design/23 §5.1 T0-6)。
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func buildCandidates(pr tidyPair, v tidyVerdict, now time.Time) []TidyCandidate {
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evidence := TidyEvidence{
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Similarity: pr.score,
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RecallMode: pr.mode,
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Containment: string(v.Containment.Kind),
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ContainmentEvidence: v.Containment.Missing,
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KindA: string(pr.a.Kind),
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KindB: string(pr.b.Kind),
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ContentA: pr.a.Content,
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ContentB: pr.b.Content,
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}
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base := TidyCandidate{
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ID: mustNewTidyID(),
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PersonaID: pr.a.PersonaID,
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Scope: pr.a.Scope,
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ProjectID: pr.a.ProjectID,
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Evidence: evidence,
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RuleVersion: TidyRuleVersion,
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Status: tidyCandidatePending,
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ScoreMin: pr.score,
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ScoreMax: pr.score,
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CreatedAt: now,
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}
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if v.Action != TidyMerge || v.Target == nil {
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// 相似但互不包含:只建链接/分组,绝不合并(design §1.3 的 A-MEM 口径)。
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base.Action = TidyLink
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base.SourceIDs = []string{pr.a.ID, pr.b.ID}
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base.Kind = pr.a.Kind
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base.Reason = "similar_but_not_contained"
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return []TidyCandidate{base}
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}
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absorbed, target := pr.a, *v.Target
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if v.Target.ID == pr.a.ID {
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absorbed, target = pr.b, pr.a
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}
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base.Action = TidyMerge
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base.SourceIDs = []string{absorbed.ID}
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base.TargetID = target.ID
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base.Kind = target.Kind
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base.ProposedContent = absorbed.Content
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base.MergedContent = target.Content
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base.Reason = v.Reason
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out := []TidyCandidate{base}
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if absorbed.Kind != target.Kind {
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// kind 误分类:以存活条目(超集)的 kind 为建议值,交人工确认
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// (design/23 §5.1 T0-6「取多数票或交人工,不自动改」)。
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re := base
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re.ID = mustNewTidyID()
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re.Action = TidyReclassify
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re.SourceIDs = []string{absorbed.ID}
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re.TargetID = ""
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re.ProposedContent = ""
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re.MergedContent = ""
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re.Reason = "kind_mismatch"
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re.Evidence.ProposedKind = string(target.Kind)
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out = append(out, re)
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}
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return out
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}
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// tidyIdempotencyKey 由 design/23 §9 的幂等键口径算出:
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// hash(persona_id, scope, project_id, sorted(source_ids), action, rule_version)。
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// 规则不变时同一批数据重复运行产出同一个键,因此候选绝不重复落库。
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func tidyIdempotencyKey(c TidyCandidate) string {
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ids := append([]string(nil), c.SourceIDs...)
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sort.Strings(ids)
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parts := []string{
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c.PersonaID, string(c.Scope), c.ProjectID,
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strings.Join(ids, ","), string(c.Action), c.RuleVersion,
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}
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sum := sha256.Sum256([]byte(strings.Join(parts, "\x00")))
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return hex.EncodeToString(sum[:])
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}
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// mustNewTidyID 生成候选 id。它复用与记忆条目同一个随机源;熵源损坏时回退到
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// 时间戳,而不是让整理整轮失败(候选 id 只需要在本库唯一)。
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func mustNewTidyID() string {
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id, err := newID()
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if err != nil {
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return fmt.Sprintf("tidy-%d", time.Now().UnixNano())
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}
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return id
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}
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