refactor agent pre-step inbox lifecycle

packages/guard/repeat-tool-guard/src/index.ts

@@ -8,7 +8,7 @@
 
 import type { Context } from 'cordis'
 import z from 'schemastery'
-import type { Agent, PromptDecision } from '@deepseek-ai/dsh-agent'
+import type { Agent, PreStepDecision } from '@deepseek-ai/dsh-agent'
 import { createUserMessage } from '@deepseek-ai/dsh-llm'
 import type { MessageSource } from '@deepseek-ai/dsh-llm'
 import type { UserMessage } from '@deepseek-ai/dsh-session'
@@ -223,8 +223,8 @@ export function apply(ctx: Context, config: Config): void {
   // A user interjection changes the context; repetition across it is not a
   // loop. Pure reset hook: always delegates (attaching nothing, vetoing
   // nothing).
-  ctx.on('agent/prompt-submit', (agent, _message, _signal, next): Promise<PromptDecision> => {
-    chains.delete(agent)
+  ctx.on('agent/pre-step', (agent, messages, _context, next): Promise<PreStepDecision> => {
+    if (messages.some(message => message.source.kind === 'user')) chains.delete(agent)
     return next()
   })
 }