agentfootprint/dist/esm/core/toolShownArgs.js

The explainable agent framework — backtrack a wrong answer to the exact context that caused it (evidence, not guesses). Built on footprintjs.

import { RedactionRule } from 'footprintjs/advanced';
/** The registry symbol a tool carries its arguments view under. */
export const SHOWN_ARGS = Symbol.for('agentfootprint.tool.shownArgs');
/**
 * The arguments view a redaction policy implies — footprintjs's own rule
 * (`RedactionRule` · `retainRecord`: keys, patterns and fields, the one
 * owner), with the placeholder the tool's served result carries
 * (`'REDACTED'`, the redacted mirror's), so a hidden key reads the same in
 * the arguments as in the result. A fresh rule per call: `RedactionRule`
 * remembers marked keys for a run, and two calls are not one run.
 */
export function argsRedactedBy(policy) {
    return (args) => new RedactionRule(policy).retainRecord(args, 'REDACTED');
}
/**
 * Whether `tool` carries an arguments view — its author declared that some
 * argument's value must not reach the record (`flowchartAsTool({ redact })`,
 * `runbookAsTool({ redact })`, or the symbol set by hand).
 */
export function carriesArgumentView(tool) {
    return (tool !== null &&
        typeof tool === 'object' &&
        typeof tool[SHOWN_ARGS] === 'function');
}
/**
 * What an event may say `tool` was called with: its own view when it carries
 * one, else the arguments themselves (same reference). Never throws — a view
 * that fails hides everything rather than show what it could not judge.
 */
export function shownArgsOf(tool, args) {
    if (tool === null || typeof tool !== 'object')
        return args;
    const view = tool[SHOWN_ARGS];
    if (typeof view !== 'function')
        return args;
    try {
        return view(args);
    }
    catch {
        return Object.fromEntries(Object.keys(args).map((key) => [key, 'REDACTED']));
    }
}
/**
 * The names of the keys whose value differs between the proposal and the
 * arguments as shown: set, rewritten, removed, or hidden by the tool's view.
 * Compared by reference, key by key — a link that spreads `...args` keeps the
 * untouched keys' references, so only what it changed is named; a rebuilt
 * nested value counts as changed (it may name more, never fewer). Plain
 * strings, so the list is detached from both objects by construction.
 */
export function changedArgKeys(proposal, shown) {
    if (proposal === shown)
        return [];
    const keys = new Set([...Object.keys(proposal), ...Object.keys(shown)]);
    return [...keys].filter((key) => !Object.prototype.hasOwnProperty.call(proposal, key) ||
        !Object.prototype.hasOwnProperty.call(shown, key) ||
        proposal[key] !== shown[key]);
}
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