logan
5416e86379
Add docs/16 for session state machine, incomplete/resume, queue semantics, and agent-loop/harness/MCP gap review. Wire RunOutcome on max-rounds, run_id through audit, TrimMessages/Redact hooks, ConfirmBindHash on write confirm path; session file skeleton without HTTP yet. No push.
476 lines
14 KiB
Go
476 lines
14 KiB
Go
package ai
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import (
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"context"
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"encoding/json"
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"fmt"
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"strings"
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"time"
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"opsxdb/server/internal/aitools"
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)
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const (
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defaultAgentMaxRounds = 8
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maxToolResultFeedChars = 12000
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maxStepArgsChars = 200
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maxGridRows = 200
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)
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// AgentReq 侧栏 Agent 请求（与 Ask 的 /api/ai/chat 分路径）。
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type AgentReq struct {
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Prompt string `json:"prompt"`
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ConnectionID string `json:"connectionId,omitempty"`
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Driver string `json:"driver,omitempty"`
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Database string `json:"database,omitempty"`
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Model string `json:"model,omitempty"`
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MaxRounds int `json:"maxRounds,omitempty"`
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Stream bool `json:"stream,omitempty"`
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SessionID string `json:"sessionId,omitempty"`
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Continue bool `json:"continue,omitempty"` // 真·续跑：注入 Prior
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Prior []Message `json:"prior,omitempty"` // 含 tool 轨迹的历史（不含本轮 user）
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RunID string `json:"runId,omitempty"` // 可选；空则自动生成
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}
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// AgentStep 挂在回复下的步骤时间线一项。
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type AgentStep struct {
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Tool string `json:"tool"`
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Args string `json:"args,omitempty"`
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OK bool `json:"ok"`
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Summary string `json:"summary"`
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Error string `json:"error,omitempty"`
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Ms int64 `json:"ms"`
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NeedConfirm bool `json:"needConfirm,omitempty"`
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ConfirmSQL string `json:"confirmSql,omitempty"`
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ConfirmBind string `json:"confirmBind,omitempty"`
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Pending bool `json:"pending,omitempty"`
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Result *AgentQueryResult `json:"result,omitempty"`
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}
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// AgentRes Agent 最终回答 + 步骤 + 运行结果契约。
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type AgentRes struct {
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Content string `json:"content"`
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SQL string `json:"sql,omitempty"`
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Steps []AgentStep `json:"steps"`
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Rounds int `json:"rounds"`
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RunID string `json:"runId,omitempty"`
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SessionID string `json:"sessionId,omitempty"`
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Outcome string `json:"runOutcome,omitempty"`
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IncompleteReason string `json:"incompleteReason,omitempty"`
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Resumable bool `json:"resumable,omitempty"`
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StepsBudget int `json:"stepsBudget,omitempty"`
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}
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// RunAgent 多轮：LLM tool_call → aitools.Runtime.Call → 回灌。
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// ConfirmDanger 永不由模型自动带上（execOneTool 会剥离 confirm_danger）。
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func RunAgent(ctx context.Context, llm ToolChat, rt *aitools.Runtime, req AgentReq) (AgentRes, error) {
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return runAgent(ctx, llm, rt, req, nil)
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}
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// RunAgentStream 同 RunAgent，经 emit 边跑边推（步骤 / 正文块 / done）。
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func RunAgentStream(ctx context.Context, llm ToolChat, rt *aitools.Runtime, req AgentReq, emit AgentEmitter) (AgentRes, error) {
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return runAgent(ctx, llm, rt, req, emit)
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}
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func runAgent(ctx context.Context, llm ToolChat, rt *aitools.Runtime, req AgentReq, emit AgentEmitter) (AgentRes, error) {
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if rt == nil {
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return AgentRes{}, fmt.Errorf("aitools runtime required")
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}
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if llm == nil {
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return AgentRes{}, fmt.Errorf("tool chat LLM required")
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}
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prompt := strings.TrimSpace(req.Prompt)
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if prompt == "" && !(req.Continue && len(req.Prior) > 0) {
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return AgentRes{}, fmt.Errorf("prompt required")
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}
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h := DefaultHarness()
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maxRounds := h.ClampRounds(req.MaxRounds)
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runID := strings.TrimSpace(req.RunID)
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if runID == "" {
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runID = NewRunID()
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}
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rt.RunID = runID
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// Agent 路径禁止模型自行带确认令牌
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rt.RejectCallerConfirm = true
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tools := aitools.OpenAITools()
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var msgs []Message
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if req.Continue && len(req.Prior) > 0 {
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msgs = append([]Message{}, req.Prior...)
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hasSystem := false
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for _, m := range msgs {
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if m.Role == "system" {
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hasSystem = true
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break
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}
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}
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if !hasSystem {
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msgs = append([]Message{{Role: "system", Content: buildAgentSystem(req)}}, msgs...)
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}
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if prompt != "" {
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msgs = append(msgs, Message{Role: "user", Content: prompt})
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}
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msgs = TrimMessages(msgs, h)
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} else {
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msgs = []Message{
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{Role: "system", Content: buildAgentSystem(req)},
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{Role: "user", Content: prompt},
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}
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}
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baseMeta := func(steps []AgentStep, rounds int) AgentRes {
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return AgentRes{
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Steps: steps,
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Rounds: rounds,
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RunID: runID,
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SessionID: req.SessionID,
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StepsBudget: maxRounds,
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}
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}
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var steps []AgentStep
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var callHistory []string
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rounds := 0
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for round := 0; round < maxRounds; round++ {
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if err := ctx.Err(); err != nil {
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res := baseMeta(steps, rounds)
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res.Content = "已取消"
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res.Outcome = OutcomeCancelled
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res.Resumable = len(steps) > 0
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emitEvent(emit, AgentEvent{Type: AgentEventError, Error: "cancelled", Steps: steps, Rounds: rounds, RunID: runID, Outcome: OutcomeCancelled})
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return res, err
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}
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rounds = round + 1
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turn, err := llm.ChatWithTools(ctx, req.Model, msgs, tools)
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if err != nil {
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res := baseMeta(steps, rounds)
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res.Outcome = OutcomeFailed
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emitEvent(emit, AgentEvent{Type: AgentEventError, Error: err.Error(), Steps: steps, Rounds: rounds, RunID: runID, Outcome: OutcomeFailed})
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return res, err
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}
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if len(turn.ToolCalls) == 0 {
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content := turn.Content
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if content == "" {
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content = "（模型未返回文本，也未调用工具）"
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}
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for _, part := range chunkDelta(content, 36) {
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emitEvent(emit, AgentEvent{Type: AgentEventDelta, Delta: part})
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}
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res := baseMeta(steps, rounds)
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res.Content = content
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res.SQL = extractSQL(content)
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res.Outcome = OutcomeCompleted
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emitEvent(emit, AgentEvent{
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Type: AgentEventDone, Content: res.Content, SQL: res.SQL, Steps: steps, Rounds: rounds,
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RunID: runID, Outcome: OutcomeCompleted, StepsBudget: maxRounds,
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})
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return res, nil
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}
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msgs = append(msgs, Message{
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Role: "assistant",
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Content: turn.Content,
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ToolCalls: turn.ToolCalls,
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})
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awaiting := false
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for _, tc := range turn.ToolCalls {
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name := strings.TrimSpace(tc.Function.Name)
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argsRaw := strings.TrimSpace(tc.Function.Arguments)
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fp := ToolCallFingerprint(name, argsRaw)
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if DetectRepeatedToolCall(callHistory, fp, h.SameCallLimit) {
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step := AgentStep{
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Tool: name,
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Args: truncateRunes(argsRaw, maxStepArgsChars),
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OK: false,
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Summary: "repeated tool call rejected (same args)",
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Error: "repeated tool call rejected (same args)",
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}
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steps = append(steps, step)
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cp := step
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emitEvent(emit, AgentEvent{Type: AgentEventStep, Step: &cp, RunID: runID})
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msgs = append(msgs, Message{
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Role: "tool", ToolCallID: tc.ID, Name: name,
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Content: step.Error,
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})
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callHistory = append(callHistory, fp)
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continue
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}
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callHistory = append(callHistory, fp)
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pending := AgentStep{Tool: name, Args: truncateRunes(argsRaw, maxStepArgsChars), Pending: true}
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emitEvent(emit, AgentEvent{Type: AgentEventStepStart, Step: &pending, RunID: runID})
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step, toolMsg := execOneTool(ctx, rt, tc)
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steps = append(steps, step)
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cp := step
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ev := AgentEvent{Type: AgentEventStep, Step: &cp, RunID: runID}
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if step.Result != nil {
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ev.Result = step.Result
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}
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emitEvent(emit, ev)
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msgs = append(msgs, toolMsg)
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if step.NeedConfirm {
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awaiting = true
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}
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}
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if awaiting {
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content := "需要确认写操作后才能继续。"
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res := baseMeta(steps, rounds)
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res.Content = content
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res.Outcome = OutcomeAwaitingConfirm
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res.Resumable = true
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emitEvent(emit, AgentEvent{
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Type: AgentEventDone, Content: content, Steps: steps, Rounds: rounds,
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RunID: runID, Outcome: OutcomeAwaitingConfirm, Resumable: true, StepsBudget: maxRounds,
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})
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return res, nil
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}
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msgs = TrimMessages(msgs, h)
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}
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content := fmt.Sprintf("已达最大工具轮次（%d）。可加预算继续，或缩小问题后重试。", maxRounds)
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for _, part := range chunkDelta(content, 36) {
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emitEvent(emit, AgentEvent{Type: AgentEventDelta, Delta: part})
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}
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res := baseMeta(steps, rounds)
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res.Content = content
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res.Outcome = OutcomeIncomplete
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res.IncompleteReason = ReasonMaxSteps
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res.Resumable = true
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emitEvent(emit, AgentEvent{
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Type: AgentEventIncomplete, Content: content, Steps: steps, Rounds: rounds,
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RunID: runID, Outcome: OutcomeIncomplete, IncompleteReason: ReasonMaxSteps,
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Resumable: true, StepsBudget: maxRounds,
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})
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return res, nil
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}
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func buildAgentSystem(req AgentReq) string {
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var b strings.Builder
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b.WriteString("你是 OpsxDB 数据库 Agent。你可以通过工具查询用户已白名单的连接。\n")
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b.WriteString("规则：\n")
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b.WriteString("1. 需要查库时必须调用工具；不要假装已执行 SQL。\n")
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b.WriteString("2. 默认只读：execute_query 以 SELECT/SHOW/EXPLAIN/DESCRIBE/WITH…SELECT 为主；Redis 以读命令为主。\n")
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b.WriteString("3. 写操作若被拒绝并提示需要确认，向用户说明须在界面确认后执行；不要声称已写入。\n")
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b.WriteString("4. 先确认 connection_id（可用 opsxdb_list_connections）；用户给出偏好连接时优先用它。\n")
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b.WriteString("5. 用中文简明回答；可执行 SQL 放在 ```sql 代码块中。\n")
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b.WriteString("6. 工具结果可能截断，注意说明。\n")
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if req.ConnectionID != "" {
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b.WriteString(fmt.Sprintf("\n用户当前偏好连接 id: %s", req.ConnectionID))
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if req.Driver != "" {
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b.WriteString(fmt.Sprintf("（%s）", req.Driver))
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}
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if req.Database != "" {
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b.WriteString(fmt.Sprintf("，数据库: %s", req.Database))
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}
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b.WriteString("。\n")
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}
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return b.String()
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}
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func execOneTool(ctx context.Context, rt *aitools.Runtime, tc ToolCall) (AgentStep, Message) {
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name := strings.TrimSpace(tc.Function.Name)
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argsRaw := strings.TrimSpace(tc.Function.Arguments)
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if argsRaw == "" {
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argsRaw = "{}"
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}
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step := AgentStep{
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Tool: name,
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Args: truncateRunes(argsRaw, maxStepArgsChars),
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}
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start := time.Now()
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var args map[string]any
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if err := json.Unmarshal([]byte(argsRaw), &args); err != nil {
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step.OK = false
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step.Error = "invalid tool arguments JSON: " + err.Error()
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step.Summary = step.Error
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step.Ms = time.Since(start).Milliseconds()
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return step, Message{
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Role: "tool",
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ToolCallID: tc.ID,
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Name: name,
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Content: step.Error,
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}
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}
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// 永不让模型自行带确认令牌
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delete(args, "confirm_danger")
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delete(args, "confirmDanger")
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out, err := rt.Call(ctx, name, args)
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step.Ms = time.Since(start).Milliseconds()
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if err != nil {
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step.OK = false
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step.Error = err.Error()
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step.Summary = err.Error()
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return step, Message{
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Role: "tool",
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ToolCallID: tc.ID,
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Name: name,
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Content: err.Error(),
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}
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}
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if m, ok := out.(map[string]any); ok {
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if nc, _ := m["needConfirm"].(bool); nc {
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step.OK = false
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step.NeedConfirm = true
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if sql, _ := m["sql"].(string); sql != "" {
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step.ConfirmSQL = sql
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} else if cmd, _ := m["command"].(string); cmd != "" {
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step.ConfirmSQL = cmd
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}
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if bind, _ := m["confirmBind"].(string); bind != "" {
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step.ConfirmBind = bind
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}
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msg, _ := m["message"].(string)
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if msg == "" {
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msg = "requires user confirmation (confirm_danger)"
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}
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step.Error = msg
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step.Summary = msg
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feed := aitools.ResultJSON(out)
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return step, Message{
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Role: "tool",
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ToolCallID: tc.ID,
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Name: name,
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Content: feed,
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}
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}
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if name == aitools.ToolExecuteQuery || name == aitools.ToolExecuteRedisCommand {
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if qr := extractQueryResult(name, args, m); qr != nil {
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step.Result = qr
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}
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}
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}
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step.OK = true
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step.Summary = summarizeToolResult(name, out)
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feed := aitools.ResultJSON(out)
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if len(feed) > maxToolResultFeedChars {
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feed = feed[:maxToolResultFeedChars] + "\n…(truncated)"
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}
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return step, Message{
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Role: "tool",
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ToolCallID: tc.ID,
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Name: name,
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Content: feed,
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}
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}
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func extractQueryResult(tool string, args map[string]any, m map[string]any) *AgentQueryResult {
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cols, _ := m["columns"].([]string)
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if cols == nil {
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if raw, ok := m["columns"].([]any); ok {
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cols = make([]string, 0, len(raw))
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for _, c := range raw {
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cols = append(cols, fmt.Sprint(c))
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}
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}
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}
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var rows []map[string]interface{}
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switch v := m["rows"].(type) {
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case []map[string]interface{}:
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rows = v
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case []any:
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for _, item := range v {
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if row, ok := item.(map[string]interface{}); ok {
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rows = append(rows, row)
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} else if row, ok := item.(map[string]any); ok {
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rows = append(rows, row)
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}
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}
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}
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if len(cols) == 0 && len(rows) == 0 {
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return nil
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}
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if len(rows) > maxGridRows {
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rows = rows[:maxGridRows]
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}
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rc := len(rows)
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switch v := m["rowCount"].(type) {
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case int:
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rc = v
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case int64:
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rc = int(v)
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case float64:
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rc = int(v)
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}
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sqlText, _ := args["sql"].(string)
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if sqlText == "" {
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sqlText, _ = args["command"].(string)
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}
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return &AgentQueryResult{
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Columns: cols,
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Rows: rows,
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RowCount: rc,
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SQL: sqlText,
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Tool: tool,
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}
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}
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func summarizeToolResult(tool string, out any) string {
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m, ok := out.(map[string]any)
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if !ok {
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return truncateRunes(fmt.Sprint(out), 120)
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}
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lenAny := func(key string) (int, bool) {
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switch v := m[key].(type) {
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case []any:
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return len(v), true
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case []string:
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return len(v), true
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default:
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return 0, false
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}
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}
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switch tool {
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case aitools.ToolListConnections:
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if n, ok := lenAny("connections"); ok {
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return fmt.Sprintf("%d connections", n)
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}
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case aitools.ToolListDatabases:
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if n, ok := lenAny("databases"); ok {
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return fmt.Sprintf("%d databases", n)
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}
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case aitools.ToolListTables:
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if n, ok := lenAny("tables"); ok {
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return fmt.Sprintf("%d tables", n)
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}
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case aitools.ToolDescribeTable:
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if t, _ := m["table"].(string); t != "" {
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if n, ok := lenAny("columns"); ok {
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return fmt.Sprintf("%s (%d cols)", t, n)
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}
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return t
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}
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case aitools.ToolGetSchemaContext:
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if s, ok := m["schema"].(string); ok {
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return fmt.Sprintf("schema %d chars", len(s))
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}
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case aitools.ToolExecuteQuery, aitools.ToolExecuteRedisCommand:
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rc := 0
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switch v := m["rowCount"].(type) {
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case int:
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rc = v
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case int64:
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rc = int(v)
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case float64:
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rc = int(v)
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}
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return fmt.Sprintf("rows=%d", rc)
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}
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return truncateRunes(aitools.ResultJSON(out), 120)
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}
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func truncateRunes(s string, n int) string {
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s = strings.Join(strings.Fields(s), " ")
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r := []rune(s)
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if len(r) <= n {
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return s
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}
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return string(r[:n]) + "…"
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}
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