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Consolidate session events: remove session_before_new/session_new, add reason field to switch events

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- Remove session_before_new and session_new hook events
- Add reason: 'new' | 'resume' to session_before_switch and session_switch events
- Remove 'new' reason from custom tool onSession (use 'switch' for both /new and /resume)
- Rename reset() to newSession(options?) in AgentSession
- Add NewSessionOptions with optional parentSession for lineage tracking
- Rename branchedFrom to parentSession in SessionHeader
- Rename RPC reset command to new_session with optional parentSession
- Update example hooks to use new event structure
- Update documentation and changelog

Based on discussion in #293
This commit is contained in:
Mario Zechner 2026-01-01 23:31:26 +01:00
parent 1d9fa13d58
commit 484d7e06bb
19 changed files with 117 additions and 117 deletions
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24
packages/coding-agent/examples/hooks/confirm-destructive.ts
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@ -5,24 +5,26 @@
* Demonstrates how to cancel session events using the before_* events.
*/
import type { HookAPI, SessionMessageEntry } from "@mariozechner/pi-coding-agent";
import type { HookAPI, SessionBeforeSwitchEvent, SessionMessageEntry } from "@mariozechner/pi-coding-agent";
export default function (pi: HookAPI) {
pi.on("session_before_new", async (_event, ctx) => {
pi.on("session_before_switch", async (event: SessionBeforeSwitchEvent, ctx) => {
if (!ctx.hasUI) return;
const confirmed = await ctx.ui.confirm("Clear session?", "This will delete all messages in the current session.");
if (event.reason === "new") {
const confirmed = await ctx.ui.confirm(
"Clear session?",
"This will delete all messages in the current session.",
);
if (!confirmed) {
ctx.ui.notify("Clear cancelled", "info");
return { cancel: true };
if (!confirmed) {
ctx.ui.notify("Clear cancelled", "info");
return { cancel: true };
}
return;
}
});
pi.on("session_before_switch", async (_event, ctx) => {
if (!ctx.hasUI) return;
// Check if there are unsaved changes (messages since last assistant response)
// reason === "resume" - check if there are unsaved changes (messages since last assistant response)
const entries = ctx.sessionManager.getEntries();
const hasUnsavedWork = entries.some(
(e): e is SessionMessageEntry => e.type === "message" && e.message.role === "user",