docs(repo): require safe session Git synchronization

[antongulin]

Adds the required session-start Git synchronization and preservation rule to the root agent instructions. Existing local work and stashes remain preserved.

Validation: git diff --check passed; only the root agent instructions changed. Local main matches origin/main after fast-forward synchronization. No application, runtime maintenance, or deployment commands were run.

[github-actions]

🏹 Robin

✅ Review done. I flagged 2 things worth a look.

Push fixes whenever you like, then comment /robin for another pass.

[github-actions]

🏹 Robin

Heads up: this is a point-in-time review. Push fixes freely, then comment /robin whenever you want another pass.

🔵 1 Low | 💡 1 Suggestions

Summary

This is a documentation-only change adding git-safety rules for agents to AGENTS.md. The rules are sensible and defensive: they explicitly prohibit destructive operations (reset, discard, auto-stash, force-push), require preserving unfinished work, and are correctly placed above the canonical DOX block so they won't be overwritten by DOX sync. The main issue is mild ambiguity in 'resolve the blocker,' which an agent could interpret as license for destructive resolution; the dense single-paragraph format also makes the discrete rules harder for an agent to follow precisely.

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