# All files / src/components/tools AgentToolCard.tsx

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     import { useState, type JSX } from "react";
    import { Link } from "react-router";
    import { parseDelegationArgs } from "@grackle-ai/common";
    import { sessionUrl } from "../../utils/navigation.js";
    import type { ToolCardProps } from "./ToolCardProps.js";
    import styles from "./toolCards.module.scss";
    import agentStyles from "./AgentToolCard.module.scss";

    /** Regex to parse Copilot read_agent structured result prefix. */
    const READ_AGENT_STATUS_PATTERN: RegExp =
      /^Agent\s+(completed|running|failed|error)\.\s*agent_id:\s*(\S+),?\s*([^\n]*)(?:\n\n([\s\S]*))?$/i;

    /** Parsed result from a Copilot read_agent poll. */
    interface ReadAgentResult {
      /** Agent lifecycle status. */
      status: string;
      /** The agent_id that was polled. */
      agentId: string;
      /** Metadata line (e.g. "elapsed: 6s, total_turns: 0, duration: 4s"). */
      metadata: string;
      /** The actual content after the status prefix. */
      content?: string;
    }

    /** Attempts to parse the structured prefix from a read_agent result. */
    function parseReadAgentResult(result: string): ReadAgentResult | undefined {
      const match = READ_AGENT_STATUS_PATTERN.exec(result);
      if (!match) {
        return undefined;
      }
      const rawContent: string | undefined = match[4] as string | undefined;
      return {
        status: match[1].toLowerCase(),
        agentId: match[2].replace(/,$/, ""),
        metadata: match[3].trim(),
        content: rawContent ? rawContent.trim() : undefined,
      };
    }

    /** Number of result lines shown when collapsed. */
    const PREVIEW_LINES: number = 5;

    /** Renders a subagent tool call (Claude Code Agent, Copilot task/read_agent). */
    export function AgentToolCard({
      tool,
      args,
      result,
      isError,
      childSessionId,
    }: ToolCardProps): JSX.Element {
      const [expanded, setExpanded] = useState(false);
      const [promptExpanded, setPromptExpanded] = useState(false);
      const info = parseDelegationArgs(tool, args);
      const inProgress = result === undefined;

      // For read_agent, try to parse the structured result
      const parsedPoll = info.isPoll && result ? parseReadAgentResult(result) : undefined;
      const displayResult = parsedPoll?.content ?? result;

      const resultLines = displayResult?.split("\n") ?? [];
      const hasMore = resultLines.length > PREVIEW_LINES;
      const visibleResult = expanded ? displayResult : resultLines.slice(0, PREVIEW_LINES).join("\n");

      // Header label
      const headerLabel = info.isPoll ? "Subagent" : "Agent";

      return (
        <div
          className={`${styles.card} ${isError ? styles.cardRed : styles.cardTeal} ${inProgress ? styles.inProgress : ""}`}
          data-testid="tool-card-agent"
        >
          {/* Header row */}
          <div className={styles.header}>
            <span className={styles.icon} style={{ color: "var(--accent-teal, #2dd4bf)" }}>
              &#9654;
            </span>
            <span className={styles.toolName} style={{ color: "var(--accent-teal, #2dd4bf)" }}>
              {headerLabel}
            </span>

            {info.agentType && (
              <span className={agentStyles.badgePill} data-testid="tool-card-agent-type">
                {info.agentType}
              </span>
            )}

            {info.model && (
              <span className={agentStyles.modelBadge} data-testid="tool-card-agent-model">
                {info.model}
              </span>
            )}

            {info.isBackground && (
              <span className={agentStyles.backgroundBadge} data-testid="tool-card-agent-background">
                <span
                  className={inProgress ? agentStyles.backgroundDotPulsing : agentStyles.backgroundDot}
                >
                  &#9679;
                </span>
                BG
              </span>
            )}

            {info.agentName && (
              <span className={styles.fileName} data-testid="tool-card-agent-name">
                {info.agentName}
              </span>
            )}

            {info.agentId && (
              <span className={styles.fileName} data-testid="tool-card-agent-id">
                {info.agentId}
              </span>
            )}

            <span className={styles.spacer} />

            {childSessionId && (
              <Link
                to={sessionUrl(childSessionId)}
                className={agentStyles.viewActivity}
                data-testid="tool-card-agent-view-activity"
              >
                View activity &#8594;
              </Link>
            )}

            {inProgress && !info.isBackground && (
              <span className={styles.exitPending} data-testid="tool-card-pending">
                &#9679;
              </span>
            )}
          </div>

          {/* Description */}
          {info.description && (
            <div className={agentStyles.description} data-testid="tool-card-agent-description">
              {info.isResume ? `Resuming: ${info.description}` : info.description}
            </div>
          )}

          {/* read_agent status line */}
          {parsedPoll && (
            <div className={agentStyles.statusLine} data-testid="tool-card-agent-status">
              <span
                className={
                  parsedPoll.status === "completed"
                    ? agentStyles.statusCompleted
                    : parsedPoll.status === "running"
                      ? agentStyles.statusRunning
                      : agentStyles.statusError
                }
              >
                {parsedPoll.status}
              </span>
              {parsedPoll.metadata && <span>{parsedPoll.metadata}</span>}
            </div>
          )}

          {/* Collapsible prompt */}
          {info.prompt && (
            <>
              <button
                type="button"
                className={agentStyles.promptToggle}
                onClick={() => {
                  setPromptExpanded((v) => !v);
                }}
                aria-expanded={promptExpanded}
                data-testid="tool-card-prompt-toggle"
              >
                <span className={`${styles.chevron} ${promptExpanded ? styles.chevronExpanded : ""}`}>
                  &#9656;
                </span>
                prompt
              </button>
              {promptExpanded && (
                <pre className={styles.pre} data-testid="tool-card-prompt">
                  {info.prompt}
                </pre>
              )}
            </>
          )}

          {/* Error result */}
          {isError && result && (
            <pre className={styles.pre} data-testid="tool-card-error">
              {result}
            </pre>
          )}

          {/* Normal result */}
          {!isError && !inProgress && displayResult && (
            <>
              <pre className={styles.pre} data-testid="tool-card-result">
                {visibleResult}
              </pre>
              {hasMore && (
                <button
                  type="button"
                  className={styles.bodyToggle}
                  onClick={() => {
                    setExpanded((v) => !v);
                  }}
                  aria-expanded={expanded}
                  data-testid="tool-card-toggle"
                >
                  <span className={`${styles.chevron} ${expanded ? styles.chevronExpanded : ""}`}>
                    &#9656;
                  </span>
                  {expanded ? "collapse" : `${resultLines.length - PREVIEW_LINES} more lines`}
                </button>
              )}
            </>
          )}
        </div>
      );
    }