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fix(core): guard against null event.seq when inserting session_messages - #31419

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Cain-Brouwer wants to merge 1 commit into
anomalyco:devfrom
Cain-Brouwer:fix/agent-switch-null-seq
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Cain-Brouwer wants to merge 1 commit into
anomalyco:devfrom
Cain-Brouwer:fix/agent-switch-null-seq

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@Cain-Brouwer

@Cain-Brouwer Cain-Brouwer commented Jun 8, 2026 •

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Issue for this PR

Closes #31204

Type of change

  • Bug fix

What does this PR do?

When switching from plan to build agent the db throws NOT NULL constraint failed: session_message.seq because event.seq is null but the check only catches undefined. Changed all === undefined checks on event.seq to == null.

How did you verify your code works?

Ran bun test in packages/core — all existing tests pass.

Checklist

  • I have tested my changes locally
  • I have not included unrelated changes in this PR

The NOT NULL constraint on session_message.seq could be violated when
event.seq is null instead of undefined. All projectors and message
inserters checked event.seq === undefined, which only guards against
undefined — null passed through and caused a SQLite constraint failure:

  NOT NULL constraint failed: session_message.seq

This occurred during session.next.agent.switched handling, preventing
the build agent from responding after switching from plan mode.

Change all event.seq === undefined checks to event.seq == null to
catch both null and undefined values.
@github-actions github-actions Bot added needs:compliance This means the issue will auto-close after 2 hours. and removed needs:compliance This means the issue will auto-close after 2 hours. labels Jun 8, 2026
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github-actions Bot commented Jun 8, 2026

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Thanks for updating your PR! It now meets our contributing guidelines. 👍

@github-actions

github-actions Bot commented Jul 8, 2026

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Automated PR Cleanup

Thank you for contributing to opencode.

Due to the high volume of PRs from users and AI agents, we periodically close older PRs using automated criteria so maintainers can focus review time on the most active and community-supported contributions.

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BUG: session_message.seq NOT NULL constraint failed on agent-switched sessions

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