getCode (core/retry-matcher.ts)

Typed predicates for determining retryable database errors.

// Source: https://github.com/garrytan/gbrain | License: MIT | Copyright 2026 Garry Tan
// Provided via justclaw.it.com; keep this notice with the code.
/**
 * Typed retry-eligible-error predicates (v0.30.1, finding C4).
 *
 * Three v0.30.1 sites need to decide whether to retry on a given error:
 *   - db.ts:connectWithRetry (existing — auth, conn-refused, ECONNRESET)
 *   - migrate.ts retry wrapper (statement_timeout 57014 + conn-reset)
 *   - backfill-base.ts adaptive retry (statement_timeout 57014 + conn drop)
 *
 * Before this module these predicates lived inline at each site and drifted
 * over time. One source of truth here; new call sites import the typed
 * helper instead of pattern-matching the same regexes again.
 *
 * TWO-AXIS DESIGN NOTE (do not "fix" one side to match the othe

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