spec: session-2.md — wholesale-replace vs field-merge on the default session; thin intermediate emissions

[JarbasAl]

Refines OVOS-SESSION-2 to Version 2.

• §5.1: the two write paths onto the default session are now unambiguous — a committed Match.updated_session (PIPELINE-1 §4.2) is a complete snapshot the orchestrator MUST adopt wholesale (deletion by omission); inbound client Messages merge field-by-field and cannot delete by omission, only overwrite.
• §3.2 thin intermediate emissions: full session REQUIRED on dispatch Messages and terminal lifecycle events clients adopt from; intermediate/status emissions MAY carry only {"session_id": ...} — fat sessions on every no-payload status event multiply bridge/layer-2 traffic for Messages nobody merges from. The §3.3 convergence point always carries the full object.
• §2.5: flip side of client authority — a boundary component injecting policy fields MUST re-apply them on every inbound Message (BRIDGE-1 §4.1 gate invariant); connect-time-only policy is not conformant.
• Citation fixes: SESSION-1 registry claims →§2.2; restart-loss →§5.2; companion-spec count six; intro CONTEXT-1/CONVERSE-1 attribution untangled.
• CHANGELOG entry + Version bump to 2.

🤖 Generated with Claude Code

[coderabbitai]

Important

Review skipped

Draft detected.

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: defaults

Review profile: CHILL

Plan: Pro

Run ID: cb583b3a-5e6f-4847-89ea-a70e75f92454

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

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch spec/session-2

---

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.}