[pc-oai]

tldr: Record advertised destination state before push negotiation so timings can distinguish absent and existing refs.

The bounded Trace2 event classifies selected branch refs as absent or existing, identifies other and mixed selections, and records whether an absent advertisement supports explicit-haves. It includes no ref names or object IDs and describes the advertisement, not the push result.

Testing

Exercised local pushes with ordinary and explicit-haves advertisements, including new refs, forced updates, up-to-date refs, and mixed selections.

What Could Go Wrong

Hidden refs can appear absent. Consumers must verify the advertisement guarantees before interpreting absence as branch creation and treat missing or ambiguous evidence as unknown.

[chatgpt-codex-connector]

Codex Review Summary

This comment shows the latest Codex review activity on this pull request.

Review	Status	Commit	Review trigger
📝 Code Review	✅ Completed 2026-10-22T18:41:48.767547Z	e0e9b7e	Draft marked ready
🔒 Security Review	✅ Completed 2026-10-22T18:36:53.077726Z	e0e9b7e	Draft marked ready

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[chatgpt-codex-connector]

💡 Codex Review

git/credential.c

Lines 228 to 229 in e0e9b7e

	changed = !credential_match(&old, &new, 1) ||
	!credential_match(&new, &old, 1) ||

Retain URL credentials across same-context redirects

When a URL containing credentials receives an absolute same-host redirect whose Location omits userinfo, these bidirectional matches treat the missing destination username/password as an identity change. credential_update_url() consequently replaces http_auth before following the redirect, so the first request to an authentication-protected destination is unauthenticated and a push or fetch fails when prompting is disabled and no helper can reproduce the URL credentials. Preserve the current credential when the redirect remains in the same credential scope and merely omits userinfo.

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