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Cause: #8182's terminal-connection guard in checkConnection() returns early for any testStatus in {credits_exhausted, banned, expired} to stop the sweep from wasting CPU/network probing connections that can never self-heal. But testStatus="expired" + errorCode="no_refresh_token" is exactly the state the pre-existing GitHub Copilot self-heal targets (isGitHubAccessTokenOnlyConnection + canClearGitHubNoRefreshTokenState, ~line 83-97 / 413-492): a Copilot connection with no OAuth refresh token but a still-valid copilotToken, which the sweep is supposed to flip back to "active". With the new guard placed ahead of that block unconditionally, the self-heal became unreachable for exactly the state it exists to clear. Impact: healthy GitHub Copilot connections that once lost their OAuth refresh token got stuck at testStatus="expired" in the dashboard forever, even though their Copilot sub-token kept working and the sweep would have cleared the stale status back to "active" every cycle before #8182. Fix: carve out the exact recoverable shape from the terminal-skip guard — testStatus==="expired" && errorCode==="no_refresh_token" && isGitHubAccessTokenOnlyConnection(conn) — so the guard still skips every other terminal case (credits_exhausted, banned, and "expired" for any other reason) untouched, matching #8182's original intent. Validation: tests/unit/token-health-no-refresh-token-expired-5326.test.ts was red (1 fail / 4 pass) before the fix — "checkConnection clears stale no_refresh_token state for usable GitHub Copilot connections" asserted testStatus flips back to "active" but got "expired". Green after the fix (6/6, including a new boundary test proving a GitHub Copilot connection expired for any OTHER reason, e.g. errorCode "invalid_grant", is still skipped untouched). Also reran the adjacent checkConnection/tokenHealthCheck suites (token-health-check.test.ts, token-health-check-circuit-breaker.test.ts, apikey-connection-health-check.test.ts, token-health-check-sweep.test.ts, token-health-check-tickms-defined.test.ts, tokenHealthCheck-batchSize.test.ts, codex-oauth-refresh-persist-6352.test.ts, oauth-providers-error-handling.test.ts) — all green, confirming #8182's terminal-skip behavior is otherwise unchanged. npm run typecheck:core clean. Refs #8182 Refs #8286 Refs #5326