[ynadge]

Primary change type

• Bug fix

Problem and motivation

Selecting the final twelve native parts by position could discard the latest useful Assistant result when blank or omitted control parts followed it.

Summary and scope

Use the same usefulness predicate for part selection and message reduction. Preserve the latest useful text/tool/file parts and report all omitted parts without claiming they were necessarily earlier.

Related work

Related issue: https://linear.app/sapiom/issue/SAP-3292

Depends on #1035. Native stack target: main.

Validation

pnpm --filter @sapiom/harness test — 4,814 unit tests and 10 performance tests passed (2 skipped), including this review correction.

The combined focused core review run passed 304 tests. Server TypeScript, scoped ESLint and diff checks passed.

Tests and documentation

Three trailing-placeholder regressions cover blank, omitted and mixed parts. Restoring positional selection failed all three assertions. Updated assistant-history.md. Increment: 97 changed lines including tests/docs/changeset; SDK pr:size is absent.

Compatibility and release impact

• No wire or persisted format migration; existing lifecycle and history contracts remain.
• Changeset: @sapiom/harness patch.
• Fix-forward: correct the bounded part selector in a focused follow-up while preserving useful recent state and explicit omissions.

Security

• No secrets, credentials, private data, or unsanitized logs included.
• No suspected vulnerability disclosed publicly.

AI assistance

• AI assistance used: Codex implemented and reviewed the change with the validation described above.

Checklist

• CONTRIBUTING.md read; maintainer-authorized issue work.
• One focused increment, checks, documentation and release impact addressed.
• I can explain and maintain the submitted changes.

---

[coderabbitai]

Important

Review skipped

Auto reviews are disabled on base/target branches other than the default branch.

Please check the settings in the CodeRabbit UI or the .coderabbit.yaml file in this repository. To trigger a single review, invoke the @coderabbitai review command.

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Advanced

Run ID: 0c05f633-6e46-44e5-b4b2-ca20f6372211

You can disable this status message by setting the reviews.review_status to false in the CodeRabbit configuration file.

Use the checkbox below for a quick retry:

• 🔍 Trigger review

---

Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.

❤️ Share

• X
• Mastodon
• Reddit
• LinkedIn

_{Comment @coderabbitai help to get the list of available commands.}

[devin-ai-integration]

✅ Devin Review: No Issues Found

Devin Review analyzed this PR and found no bugs or issues to report.