Hooks du cycle de vie de la session

• Initialiser le contexte lorsque les sessions commencent
• Nettoyer les ressources lorsque les sessions se terminent
• Suivre les métriques de session et l'analyse
• Configurer dynamiquement le comportement de session

Point d’ancrage de début de session {#session-start}

Le onSessionStart hook est appelé lorsqu’une session commence (nouvelle ou reprise).

Signature du hook

import type { SessionStartHookInput, HookInvocation, SessionStartHookOutput } from "@github/copilot-sdk";
type SessionStartHandler = (
  input: SessionStartHookInput,
  invocation: HookInvocation
) => Promise<SessionStartHookOutput | null | undefined>;

type SessionStartHandler = (
  input: SessionStartHookInput,
  invocation: HookInvocation
) => Promise<SessionStartHookOutput | null | undefined>;

from copilot.session import SessionStartHookInput, SessionStartHookOutput
from typing import Callable, Awaitable

SessionStartHandler = Callable[
    [SessionStartHookInput, dict[str, str]],
    Awaitable[SessionStartHookOutput | None]
]

SessionStartHandler = Callable[
    [SessionStartHookInput, dict[str, str]],
    Awaitable[SessionStartHookOutput | None]
]

package main

import copilot "github.com/github/copilot-sdk/go"

type SessionStartHandler func(
    input copilot.SessionStartHookInput,
    invocation copilot.HookInvocation,
) (*copilot.SessionStartHookOutput, error)

func main() {}

type SessionStartHandler func(
    input SessionStartHookInput,
    invocation HookInvocation,
) (*SessionStartHookOutput, error)

using GitHub.Copilot;

public delegate Task<SessionStartHookOutput?> SessionStartHandler(
    SessionStartHookInput input,
    HookInvocation invocation);

public delegate Task<SessionStartHookOutput?> SessionStartHandler(
    SessionStartHookInput input,
    HookInvocation invocation);

import com.github.copilot.rpc.*;
import java.util.concurrent.CompletableFuture;

public class SessionStartSignature {
    SessionStartHandler handler = (SessionStartHookInput input, HookInvocation invocation) ->
        CompletableFuture.completedFuture(null);
    public static void main(String[] args) {}
}

@FunctionalInterface
public interface SessionStartHandler {
    CompletableFuture<SessionStartHookOutput> handle(
        SessionStartHookInput input,
        HookInvocation invocation);
}

Input

Sortie

Exemples

Ajouter un contexte de projet au début

const session = await client.createSession({
  hooks: {
    onSessionStart: async (input, invocation) => {
      console.log(`Session ${invocation.sessionId} started (${input.source})`);
      
      const projectInfo = await detectProjectType(input.cwd);
      
      return {
        additionalContext: `
This is a ${projectInfo.type} project.
Main language: ${projectInfo.language}
Package manager: ${projectInfo.packageManager}
        `.trim(),
      };
    },
  },
});

from copilot.session import PermissionHandler

async def on_session_start(input_data, invocation):
    print(f"Session {invocation['session_id']} started ({input_data['source']})")
    
    project_info = await detect_project_type(input_data["cwd"])
    
    return {
        "additionalContext": f"""
This is a {project_info['type']} project.
Main language: {project_info['language']}
Package manager: {project_info['packageManager']}
        """.strip()
    }

session = await client.create_session(on_permission_request=PermissionHandler.approve_all, hooks={"on_session_start": on_session_start})

Gérer la reprise de session

const session = await client.createSession({
  hooks: {
    onSessionStart: async (input, invocation) => {
      if (input.source === "resume") {
        // Load previous session state
        const previousState = await loadSessionState(invocation.sessionId);
        
        return {
          additionalContext: `
Session resumed. Previous context:
- Last topic: ${previousState.lastTopic}
- Open files: ${previousState.openFiles.join(", ")}
          `.trim(),
        };
      }
      return null;
    },
  },
});

Charger les préférences utilisateur

const session = await client.createSession({
  hooks: {
    onSessionStart: async () => {
      const preferences = await loadUserPreferences();
      
      const contextParts = [];
      
      if (preferences.language) {
        contextParts.push(`Preferred language: ${preferences.language}`);
      }
      if (preferences.codeStyle) {
        contextParts.push(`Code style: ${preferences.codeStyle}`);
      }
      if (preferences.verbosity === "concise") {
        contextParts.push("Keep responses brief and to the point.");
      }
      
      return {
        additionalContext: contextParts.join("\n"),
      };
    },
  },
});

Hook de fin de session {#session-end}

Le onSessionEnd hook est appelé lorsqu’une session se termine.

Signature du hook

type SessionEndHandler = (
  input: SessionEndHookInput,
  invocation: HookInvocation
) => Promise<SessionEndHookOutput | null | undefined>;

from copilot.session import SessionEndHookInput
from typing import Callable, Awaitable

SessionEndHandler = Callable[
    [SessionEndHookInput, dict[str, str]],
    Awaitable[None]
]

SessionEndHandler = Callable[
    [SessionEndHookInput, dict[str, str]],
    Awaitable[SessionEndHookOutput | None]
]

package main

import copilot "github.com/github/copilot-sdk/go"

type SessionEndHandler func(
    input copilot.SessionEndHookInput,
    invocation copilot.HookInvocation,
) error

func main() {}

type SessionEndHandler func(
    input SessionEndHookInput,
    invocation HookInvocation,
) (*SessionEndHookOutput, error)

public delegate Task<SessionEndHookOutput?> SessionEndHandler(
    SessionEndHookInput input,
    HookInvocation invocation);

import com.github.copilot.rpc.*;
import java.util.concurrent.CompletableFuture;

public class SessionEndSignature {
    SessionEndHandler handler = (SessionEndHookInput input, HookInvocation invocation) ->
        CompletableFuture.completedFuture(null);
    public static void main(String[] args) {}
}

@FunctionalInterface
public interface SessionEndHandler {
    CompletableFuture<SessionEndHookOutput> handle(
        SessionEndHookInput input,
        HookInvocation invocation);
}

Input

Raisons de fin

Sortie

Exemples

Suivre les métriques de session

const sessionStartTimes = new Map<string, number>();

const session = await client.createSession({
  hooks: {
    onSessionStart: async (input, invocation) => {
      sessionStartTimes.set(invocation.sessionId, input.timestamp);
      return null;
    },
    onSessionEnd: async (input, invocation) => {
      const startTime = sessionStartTimes.get(invocation.sessionId);
      const duration = startTime ? input.timestamp - startTime : 0;
      
      await recordMetrics({
        sessionId: invocation.sessionId,
        duration,
        endReason: input.reason,
      });
      
      sessionStartTimes.delete(invocation.sessionId);
      return null;
    },
  },
});

from copilot.session import PermissionHandler

session_start_times = {}

async def on_session_start(input_data, invocation):
    session_start_times[invocation["session_id"]] = input_data["timestamp"]
    return None

async def on_session_end(input_data, invocation):
    start_time = session_start_times.get(invocation["session_id"])
    duration = input_data["timestamp"] - start_time if start_time else 0
    
    await record_metrics({
        "session_id": invocation["session_id"],
        "duration": duration,
        "end_reason": input_data["reason"],
    })
    
    session_start_times.pop(invocation["session_id"], None)
    return None

session = await client.create_session(on_permission_request=PermissionHandler.approve_all, hooks={
        "on_session_start": on_session_start,
        "on_session_end": on_session_end,
    })

Nettoyer les ressources

const sessionResources = new Map<string, { tempFiles: string[] }>();

const session = await client.createSession({
  hooks: {
    onSessionStart: async (input, invocation) => {
      sessionResources.set(invocation.sessionId, { tempFiles: [] });
      return null;
    },
    onSessionEnd: async (input, invocation) => {
      const resources = sessionResources.get(invocation.sessionId);
      
      if (resources) {
        // Clean up temp files
        for (const file of resources.tempFiles) {
          await fs.unlink(file).catch(() => {});
        }
        sessionResources.delete(invocation.sessionId);
      }
      
      console.log(`Session ${invocation.sessionId} ended: ${input.reason}`);
      return null;
    },
  },
});

Enregistrer l’état de session pour reprendre

const session = await client.createSession({
  hooks: {
    onSessionEnd: async (input, invocation) => {
      if (input.reason !== "error") {
        // Save state for potential resume
        await saveSessionState(invocation.sessionId, {
          endTime: input.timestamp,
          cwd: input.cwd,
          reason: input.reason,
        });
      }
      return null;
    },
  },
});

Résumé de la session de journalisation

const sessionData: Record<string, { prompts: number; tools: number; startTime: number }> = {};

const session = await client.createSession({
  hooks: {
    onSessionStart: async (input, invocation) => {
      sessionData[invocation.sessionId] = { 
        prompts: 0, 
        tools: 0, 
        startTime: input.timestamp 
      };
      return null;
    },
    onUserPromptSubmitted: async (_, invocation) => {
      sessionData[invocation.sessionId].prompts++;
      return null;
    },
    onPreToolUse: async (_, invocation) => {
      sessionData[invocation.sessionId].tools++;
      return { permissionDecision: "allow" };
    },
    onSessionEnd: async (input, invocation) => {
      const data = sessionData[invocation.sessionId];
      console.log(`
Session Summary:
  ID: ${invocation.sessionId}
  Duration: ${(input.timestamp - data.startTime) / 1000}s
  Prompts: ${data.prompts}
  Tool calls: ${data.tools}
  End reason: ${input.reason}
      `.trim());
      
      delete sessionData[invocation.sessionId];
      return null;
    },
  },
});

Crochet d’arrêt de l’agent {#agent-stop}

Le crochet d’arrêt de l’agent s’exécute lorsque l’agent de niveau supérieur atteint naturellement la fin d’un tour. Il est distinct de onSessionEnd: la session reste active et le hook peut demander un autre tour d’agent.

Input

Les noms des membres publics suivent les conventions de casse de chaque langue :

Sortie

Retournez aucune sortie pour laisser l’agent s’arrêter. Renvoyer une décision de bloc pour mettre un autre message utilisateur en file d’attente et continuer :

{
  "decision": "block",
  "reason": "Run the final validation and fix any failures."
}

Utilisez le membre actif-stop listé ci-dessus pour éviter de bloquer à plusieurs reprises un agent qui a déjà continué en raison de ce crochet. Le runtime limite également les décisions de bloc consécutives.

Bonnes pratiques

1. Assurez onSessionStart la rapidité - Les utilisateurs attendent que la session soit prête.

2. Gérer toutes les raisons de fin - Ne partez pas du principe que les sessions se terminent correctement ; gérer les erreurs et les abandons.

3. Libérer les ressources - Utilisez onSessionEnd pour libérer les ressources allouées pendant la session.

4. Stocker un état minimal : si vous effectuez le suivi des données de session, veillez à les limiter au strict nécessaire.

5. Rendez le nettoyage idempotent - onSessionEnd peut ne pas être appelé si le processus se bloque.

Voir aussi

• Utiliser des crochets
• Hook de gestion des erreurs
• Guide de débogage