feat(cli): export and import sessions

[uinstinct]

Description

Add the ability to export a selected session and import it by path of the file.

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Checklist

• [] I've read the contributing guide
• [] The relevant docs, if any, have been updated or created
• [] The relevant tests, if any, have been updated or created

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Summary by cubic

Add CLI support to export a session to JSON and import a session from a file path. Adds new slash commands and a TUI export selector to make moving sessions easy.

• New Features
  • Added /export to pick a session and save it as JSON in the current directory (continue-session-.json), including version and exportedAt.
  • Added /import with helpful errors for missing/invalid paths.
  • On import, if the sessionId already exists, a new UUID is generated and the session is saved without overwriting.
  • Integrated with the TUI: new Export selector screen, command routing, and system messages on success/failure.

^{Written for commit 026a449. Summary will update on new commits.}

[cubic-dev-ai]

3 issues found across 8 files

Prompt for AI agents (unresolved issues)

Check if these issues are valid — if so, understand the root cause of each and fix them. If appropriate, use sub-agents to investigate and fix each issue separately.


<file name="extensions/cli/src/slashCommands.ts">

<violation number="1" location="extensions/cli/src/slashCommands.ts:199">
P2: `/import` only uses `args[0]`, so file paths containing spaces are truncated and reported as missing.</violation>

<violation number="2" location="extensions/cli/src/slashCommands.ts:218">
P2: Import command lacks runtime validation of exported session format/version before persistence, allowing incompatible or malformed session data to be saved.</violation>

<violation number="3" location="extensions/cli/src/slashCommands.ts:222">
P1: Import collision detection only checks 1000 sessions, so duplicate IDs outside that window can be missed and existing sessions overwritten.</violation>
</file>

_{Reply with feedback, questions, or to request a fix. Tag @cubic-dev-ai to re-run a review.}

[cubic-dev-ai]

P1: Import collision detection only checks 1000 sessions, so duplicate IDs outside that window can be missed and existing sessions overwritten.

Prompt for AI agents

Check if this issue is valid — if so, understand the root cause and fix it. At extensions/cli/src/slashCommands.ts, line 222:

<comment>Import collision detection only checks 1000 sessions, so duplicate IDs outside that window can be missed and existing sessions overwritten.</comment>

<file context>
@@ -173,6 +178,83 @@ function handleJobs() {
+
+    let session = exportedData.session;
+
+    const existingSessions = historyManager.list({ limit: 1000 });
+    const sessionExists = existingSessions.some(
+      (s) => s.sessionId === session.sessionId,
</file context>

Suggested change

	const existingSessions = historyManager.list({ limit: 1000 });
	const existingSessions = historyManager.list({});

[cubic-dev-ai]

P2: /import only uses args[0], so file paths containing spaces are truncated and reported as missing.

Prompt for AI agents

Check if this issue is valid — if so, understand the root cause and fix it. At extensions/cli/src/slashCommands.ts, line 199:

<comment>`/import` only uses `args[0]`, so file paths containing spaces are truncated and reported as missing.</comment>

<file context>
@@ -173,6 +178,83 @@ function handleJobs() {
+function handleImport(args: string[]): SlashCommandResult {
+  posthogService.capture("useSlashCommand", { name: "import" });
+
+  const filePath = args[0];
+  if (!filePath) {
+    return {
</file context>

Suggested change

	const filePath = args[0];
	const filePath = args.join(" ").trim().replace(/^['\"]|['\"]$/g, "");

[cubic-dev-ai]

P2: Import command lacks runtime validation of exported session format/version before persistence, allowing incompatible or malformed session data to be saved.

Prompt for AI agents

Check if this issue is valid — if so, understand the root cause and fix it. At extensions/cli/src/slashCommands.ts, line 218:

<comment>Import command lacks runtime validation of exported session format/version before persistence, allowing incompatible or malformed session data to be saved.</comment>

<file context>
@@ -173,6 +178,83 @@ function handleJobs() {
+
+  try {
+    const fileContent = fs.readFileSync(filePath, "utf-8");
+    const exportedData: ExportedSession = JSON.parse(fileContent);
+
+    let session = exportedData.session;
</file context>