/** Structured worktree entry from git worktree list --porcelain */
export interface WorktreeEntry {
    /** Absolute path to worktree root */
    path: string;
    /** HEAD commit hash */
    head: string;
    /** Branch name, null if detached HEAD */
    branch: string | null;
    /** Whether this worktree is locked */
    locked: boolean;
    /** Lock reason if locked */
    lockReason?: string;
    /** Whether this worktree is prunable */
    prunable: boolean;
}
/** Structured execution environment for agent context */
export interface ExecutionEnvironment {
    host: string;
    os: string;
    /** Login shell from $SHELL or platform default — may differ from the tool shell */
    loginShell: string;
    initialCwd: string;
    effectiveCwd: string;
    /** Git root of the effective working directory, or null */
    gitRoot: string | null;
    /** Git root of the initial working directory, only set when different from gitRoot */
    controllerGitRoot: string | null;
    gitBranch: string | null;
    gitWorktree: string | null;
    worktreeCount: number;
    isDetachedHead: boolean;
}
/**
 * Parse git worktree list --porcelain output into structured entries.
 * Returns empty array if git is unavailable or the repo has no worktrees.
 */
export declare function parseWorktreeList(cwd: string): WorktreeEntry[];
/**
 * Build a concise execution environment summary for the agent prompt.
 *
 * Sources:
 * - os.hostname() for host
 * - process.platform for OS (linux, darwin, win32)
 * - process.env.SHELL or platform default for shell
 * - initialCwd must be captured at session start and passed in
 * - process.cwd() for effective cwd
 * - git rev-parse for repo root
 * - git worktree list for worktree info
 *
 * Never includes secrets, full env vars, or sensitive data.
 */
export declare function buildExecutionEnvironment(initialCwd: string): ExecutionEnvironment;
/**
 * Provides git branch and extension statuses - data not otherwise accessible to extensions.
 * Token stats, model info available via ctx.sessionManager and ctx.model.
 */
export declare class FooterDataProvider {
    private extensionStatuses;
    private cachedBranch;
    private gitPaths;
    private headWatcher;
    private reftableWatcher;
    private branchChangeCallbacks;
    private availableProviderCount;
    constructor();
    /** Current git branch, null if not in repo, "detached" if detached HEAD */
    getGitBranch(): string | null;
    /** Repository directory name, null if not in a git repository */
    getGitRepoName(): string | null;
    /** Extension status texts set via ctx.ui.setStatus() */
    getExtensionStatuses(): ReadonlyMap<string, string>;
    /** Subscribe to git branch changes. Returns unsubscribe function. */
    onBranchChange(callback: () => void): () => void;
    /** Internal: set extension status */
    setExtensionStatus(key: string, text: string | undefined): void;
    /** Internal: clear extension statuses */
    clearExtensionStatuses(): void;
    /** Number of unique providers with available models (for footer display) */
    getAvailableProviderCount(): number;
    /** Internal: update available provider count */
    setAvailableProviderCount(count: number): void;
    /** Internal: cleanup */
    dispose(): void;
    private notifyBranchChange;
    private refreshGitBranch;
    private resolveGitBranch;
    private setupGitWatcher;
}
/** Read-only view for extensions - excludes setExtensionStatus, setAvailableProviderCount and dispose */
export type ReadonlyFooterDataProvider = Pick<FooterDataProvider, "getGitBranch" | "getGitRepoName" | "getExtensionStatuses" | "getAvailableProviderCount" | "onBranchChange">;
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