/**
 * Concurrency detection: is another session working in this repository?
 * (AC-7, AC-8, AC-12, AC-13, AC-14)
 *
 * Primary signal: another session's non-stale claim in the claim store.
 * Pure reads — one directory listing plus YAML parses, no git subprocess
 * on the hot path (NFR-1). Branch-pattern / dirty-tree corroboration is
 * for reporting only and never blocks alone.
 *
 * Own-session exclusion (design F2): claims matching the resolved session
 * id are excluded, as are claims recorded from this worktree's own path.
 */
import { type ClaimStore } from './claim-store.js';
import { type ConcurrencyConfig, type Detection } from './types.js';
/** Load the `concurrency:` block from `.aidlc/config.yaml` (AC-13). */
export declare function loadConcurrencyConfig(projectRoot: string): ConcurrencyConfig;
/**
 * Detect other live sessions holding claims in this repository (AC-7).
 * Staleness is `claim_timeout_minutes` — the one existing knob, no
 * parallel threshold (idea decision 4).
 *
 * Splits live claims by whether they SHARE this session's working directory
 * (automation-verdicts/AC-8). The gate exists because two sessions in one
 * checkout collide on git — one's `git add -A` stages what the other left on
 * disk, and creating a branch in place yanks the other session off its own. A
 * session in its own worktree, on its own branch, can do none of that.
 *
 * Before this, the check asked "is another session live?" while meaning "does
 * another session share my working directory?", and it got the one worktree
 * comparison it had backwards: it excluded claims recorded from THIS path and
 * blocked claims recorded from OTHER paths — so taking the gate's own
 * recommendation (option 1, "start in a separate worktree") made every later
 * start in the primary checkout hit the same block, and offered a worktree it
 * did not need. Observed 2026-09-03 while releasing `single-clack-prompt-seam`,
 * where none of the three offered options fit and the instance was created by
 * hand.
 *
 * @param primaryRoot - The primary checkout's copy of the project
 *   (`primaryProjectRoot`), or null/undefined when the caller does not know. It is
 *   compared with `projectRoot`, so it must name the same kind of directory: the
 *   checkout's top would never match a project below the repository root
 *   (repo-root-is-not-the-project/AC-4). A claim with no `worktree_path` was
 *   recorded from the primary checkout; without knowing where that is we cannot
 *   rule out that it is here, so it is treated as sharing. That is the fail-safe
 *   direction and it is exactly today's behaviour.
 *
 *   Passed in rather than resolved here to keep NFR-1: this function stays pure
 *   reads — one directory listing plus YAML parses — and adds no git subprocess.
 */
export declare function detectConcurrency(store: ClaimStore, ownSessionId: string, timeoutMinutes: number, projectRoot: string, primaryRoot?: string | null, now?: Date): Detection;
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