## Release v0.51.257 — Release HY (stage-r5)
Two rebased ★★★ fixes.
### Fixed
| Issue | Author | Fix |
|-------|--------|-----|
| #3546 | @rodboev | **"Refresh Models" on a provider card no longer returns "Error: Not found".** Sent `POST /api/models/refresh` but no route matched (404). Added the route, wired to the existing `invalidate_provider_models_cache(provider_id)`. |
| #3548 | @franksong2702 | **Credential self-heal no longer writes to a dead `SessionDB` handle.** A credential-refresh evicted/closed the cached agent, but the retry rebuilt a new agent from kwargs still holding the old closed `SessionDB` → persistence silently targeted a dead handle. Per-request `SessionDB` construction centralized + refreshed on the retry. |
### Dropped from this batch
- **#2660** (session-event SSE profile scoping) — the Codex regression gate found **two SILENT dropped-refresh bugs** the scoping introduced: (1) the `maxsize=1` subscriber-queue coalescing overwrites a pending profile-A event with a profile-B event → A-tabs filter B out and never refresh for the A change; (2) renamed-root/`default` alias mismatch (backend `_profiles_match` treats them equal, the client filter uses a literal `!==`). A dropped refresh (stale sidebar) is worse than the extra refreshes the PR removes. Held with `changes-requested` + repros + the fail-safe fix (coalesce to unscoped on a profile mismatch; normalize root aliases).
### Gate
- Full pytest suite: **7622 passed, 0 failed**
- ESLint: CLEAN · ruff: CLEAN · browser-smoke: CLEAN
- Codex (regression): SHIP-ONLY-WITH-FIXES (#2660 dropped-refresh bugs) → #2660 dropped + held → **SAFE TO SHIP**
Co-authored-by: rodboev <rodboev@users.noreply.github.com>
Co-authored-by: franksong2702 <franksong2702@users.noreply.github.com>
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