fix: display session ID after CLI invoke completes

[notgitika]

Summary

• Shows the session ID and a resume command hint after agentcore invoke completes in non-interactive CLI mode (both --stream and default)
• The TUI path was already fixed by fix(invoke): show full session ID and print resume command on exit #904, but the CLI paths discarded the session ID

Closes #664

Changes

• types.ts — Added sessionId to InvokeResult interface
• action.ts — Capture sessionId from invokeAgentRuntimeStreaming() and invokeAgentRuntime() responses and include it in the returned result
• command.tsx — Print session ID and resume command to stderr after streaming or non-streaming output completes

Example output

<agent response>

Session: abc123-def456-...
To resume: agentcore invoke --session-id abc123-def456-...
Log: agentcore/.cli/logs/invoke/...

Test plan

• Run agentcore invoke "hello" --stream — session ID printed after stream
• Run agentcore invoke "hello" — session ID printed after response
• Run agentcore invoke "hello" --json — session ID included in JSON output
• Verify session ID is not printed when invoke fails

[github-actions]

Package Tarball

aws-agentcore-0.9.1.tgz

How to install

npm install https://github.com/aws/agentcore-cli/releases/download/pr-957-tarball/aws-agentcore-0.9.1.tgz

[jesseturner21]

The AGUI protocol branch in action.ts (around lines 326–378) also receives a sessionId from invokeAguiRuntime() (see aguiResult.sessionId, and how the TUI uses it in useInvokeFlow.ts:349-351), but that branch still returns without populating sessionId on the InvokeResult. As a result, users invoking AGUI agents via the CLI won't get the session ID printed, even though the PR description says CLI paths that discarded the session ID are now fixed.

Suggested fix: capture aguiResult.sessionId in the AGUI branch and include it in the returned InvokeResult, e.g.:

return {
  success: !hasError,
  agentName: agentSpec.name,
  targetName: selectedTargetName,
  response,
  sessionId: aguiResult.sessionId,
  logFilePath: logger.logFilePath,
};

(A2A intentionally returns sessionId: undefined today, so no change needed there.)

[jesseturner21]

Reviewed the PR. The one serious issue I spotted — the AGUI branch in action.ts not propagating aguiResult.sessionId into the returned InvokeResult, which leaves CLI AGUI users without the session ID despite the PR description — has already been flagged by @jesseturner21. No additional blocking issues from me; LGTM once that's addressed.

[jesseturner21]

Reviewed — the only serious issue I found (the AGUI branch not propagating sessionId into the InvokeResult) has already been raised by @jesseturner21. Once that's addressed, this looks good to merge.

[notgitika]

Good catch @jesseturner21 I added it in my latest commit