/**
 * Investigate agent loop. Reads a GitHub issue, runs a Claude
 * tool-use loop with read-only repo tools, and emits a validated
 * BugProfile.
 *
 * alpha.2b — real LLM integration. PR opening (creating a branch
 * + pushing the bug-profile.yaml + opening the PR) lands in
 * alpha.2c; this returns the profile to the caller for now.
 *
 * Pattern mirrors brew/agent.ts's runTurn loop but smaller:
 * - read-only tools (no write_file, no justify_diff_overflow)
 * - single conversation, not multi-turn ratchet
 * - output validated against bug-profile schema
 */
import { type BugProfile } from "./schema.js";
export interface InvestigateContext {
    repoRoot: string;
    anthropicApiKey: string;
    model: string;
    /** Filled in by the caller; the LLM doesn't pick the bug-id. */
    bugId: string;
    /** CLI version stamp for `investigated_by`. */
    cliVersion: string;
    issue: {
        number: number;
        title: string;
        body: string;
        /** Prior comments (oldest first), already filtered to non-bot. */
        priorComments: string[];
    };
    /** Used to stamp `created_at` deterministically in tests. */
    now?: () => Date;
}
export interface InvestigateResult {
    profile: BugProfile;
    /** USD spent on the investigation round. */
    spendUsd: number;
    /** Number of LLM rounds (1 round = one LLM call + tool execution). */
    rounds: number;
    /** True if the agent emitted a `<halt>` block instead of a profile. */
    halted: boolean;
    /** Halt reason from the agent (only set when halted=true). */
    haltReason?: string;
    /** Raw final-round text the agent emitted (debugging aid). */
    finalText: string;
}
export declare function runInvestigation(ctx: InvestigateContext): Promise<InvestigateResult>;
/**
 * Extract the YAML body from a `<bug_profile>...</bug_profile>` block,
 * parse + validate it. Throws on missing block / invalid YAML / failed
 * schema validation. The agent prompt explicitly requires the block;
 * a missing block is a contract violation.
 */
export declare function parseBugProfileBlock(finalText: string, ctx: InvestigateContext): BugProfile;
/**
 * Minimal YAML subset parser. Handles the shape investigate emits:
 *   - top-level scalar `key: value` (string, number, or quoted string)
 *   - `key:` followed by `  - "string"` list items
 *   - `key:` followed by indented `child: value` pairs (one level deep)
 *   - block scalars `key: |` followed by indented lines
 *
 * NOT a general YAML parser. We avoid pulling `yaml` dep into this
 * module; the agent's output has a constrained shape that this can
 * cover. Falls back to throwing on anything outside that shape, which
 * surfaces parser drift as a clear error rather than silent miss.
 */
export declare function parseSimpleYaml(src: string): Record<string, unknown>;
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