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88 lines
3.7 KiB
Go
88 lines
3.7 KiB
Go
package agent
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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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"log"
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"runtime/debug"
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actool "github.com/Autumn-27/norma/tool"
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)
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// DeferredInfo carries the deferred-tools wiring an agent needs to build its
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// Options: the MCP tool names whose schemas are withheld, the subset listed in the
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// global system-prompt block (non-skill-gated), and the shared session unlock set.
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// UnlockSkill unlocks a named skill's MCPs — hosts call it to rebuild the unlock set
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// from history on a resumed session (design doc C2).
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type DeferredInfo struct {
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FindingGuidance string // derived from the final permitted tools, including DB overrides
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Deferred []string // all MCP tool names (schema withheld)
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GlobalNames []string // MCP names to list in the system-prompt block
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Unlock *actool.UnlockSet // shared call-gate; nil when no MCP tools
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UnlockSkill func(skillName string)
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}
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// ToolAugment, if set, returns the EXTRA tools an agent should see beyond its
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// built-in base set — the agent's visible skills (packed into one Skill meta-tool)
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// and visible MCP servers (expanded to mcp__server__tool). It also returns the
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// DeferredInfo describing how those MCP tools are deferred/gated. The server wires
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// it to the PG agent_visibility table. cleanup releases any spawned MCP clients.
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//
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// When nil, agents run with only their built-in tools — behavior is unchanged
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// until a user assigns a skill/MCP to the agent in the UI.
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var ToolAugment func(ctx context.Context, agentKey string) (extra []actool.CoreTool, def DeferredInfo, cleanup func())
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// AugmentTools returns base plus the agent's visible skill/MCP tools, the
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// DeferredInfo, and a cleanup func the caller must defer (closes MCP clients).
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// Built-in base tools are kept as-is — never filtered (内置工具留代码层，不做可见性过滤).
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func AugmentTools(ctx context.Context, agentKey string, base []actool.CoreTool) ([]actool.CoreTool, DeferredInfo, func()) {
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var (
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def DeferredInfo
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cleanup = func() {}
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out = base
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)
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if ToolAugment != nil {
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var extra []actool.CoreTool
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var cl func()
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extra, def, cl = ToolAugment(ctx, agentKey)
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if cl != nil {
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cleanup = cl
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}
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if len(extra) > 0 {
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out = append(append([]actool.CoreTool{}, base...), extra...)
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}
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}
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// DB tools table has the final say on the built-in tools: drop the ones this
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// agent isn't bound to (or that are disabled) and swap in overridden
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// descriptions/schemas + default injection. MCP/skill/host tools have no row
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// and pass through untouched, so deferred/unlock wiring stays consistent.
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if ToolResolve != nil {
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out = ToolResolve(ctx, agentKey, out)
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}
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out, def.FindingGuidance = findingWorkflowTools(agentKey, out)
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for i, t := range out {
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out[i] = guardPanic(t)
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}
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return out, def, cleanup
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}
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// guardPanic turns a panicking tool handler into an ordinary tool error. The
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// harness runs each tool on its own goroutine, so a panic inside a handler can't
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// be recovered by the caller that started the run — it takes the whole process
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// down, and on restart the agent replays the same call and crashes again. Applied
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// last, so it covers every tool the agent can reach: domain, SDK, MCP and skill.
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func guardPanic(t actool.CoreTool) actool.CoreTool { return &guardedTool{CoreTool: t} }
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type guardedTool struct{ actool.CoreTool }
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func (g *guardedTool) Call(ctx context.Context, in json.RawMessage, tc *actool.ToolContext) (res actool.Result, err error) {
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defer func() {
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if r := recover(); r != nil {
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log.Printf("[tools] %s panic: %v\n%s", g.Name(), r, debug.Stack())
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res, err = actool.Errorf(fmt.Sprintf("工具 %s 内部错误：%v（本次调用已失败，可换个参数或改用别的工具）", g.Name(), r)), nil
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}
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}()
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return g.CoreTool.Call(ctx, in, tc)
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}
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