/**
 * Non-executable source-line gate.
 *
 * Defensive utility for circle-ir + downstream consumers (cognium-ai).
 * A "source" whose line number points at an import, package, comment,
 * annotation-only line, or a compile-time constant declaration cannot
 * legitimately host a runtime taint source — no HTTP parameter, cookie,
 * DB read, or user-controlled variable can be introduced by such a
 * line. When we see one, it is either:
 *
 *   1. an LLM enrichment hallucination (cognium-dev#250 root cause) —
 *      circle-ir-ai's `discoverSourcesForLanguage` step occasionally
 *      returns fabricated `additionalSources` at the top of the file,
 *   2. a static-detector regression that resolved a source line to a
 *      wrong AST node, or
 *   3. a caller bug — some external consumer passed a synthetic
 *      TaintSource with an obviously-wrong line.
 *
 * In all three cases, dropping the source is correct: any resulting
 * finding is a fabricated flow that would fail human review anyway.
 *
 * This module is intentionally regex-only (no AST dependency) so it can
 * run at any pipeline stage — including after enrichment, before finding
 * emission — and is fast enough to invoke per-source without measurable
 * overhead.
 */
/**
 * Return true when the given 1-based line number in `sourceCode` cannot
 * host a runtime taint source under the given language.
 *
 * Returns false (permissive) when:
 *   - `line` is out of range (defensive; callers should already have valid lines)
 *   - the language is unrecognized
 *   - the line's content genuinely looks executable
 */
export declare function isNonExecutableSourceLine(sourceCode: string, line: number, language: string): boolean;
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