{"version":"2.1.286","anchor":"forked-agents-can-swap-parent-tools-via-toolcallroutes-and-c","canonical_anchor":"forked-agents-can-swap-parent-tools-via-toolcallroutes-and-c","heading":"Forked agents can swap individual tools and share a retry budget","tier":"internal","area":"Subagents","url":"https:\/\/changelogs.core-directive.com\/v\/2.1.286\/e\/forked-agents-can-swap-parent-tools-via-toolcallroutes-and-c","release_url":"https:\/\/changelogs.core-directive.com\/v\/2.1.286","markdown":"### Forked agents can swap individual tools and share a retry budget\n\nForked agents can now replace some of the main conversation's tools with altered copies and receive a count of API attempts left\n\n**Unclear.** It is not clear which parts of Claude Code pass tool replacements to a forked agent, or whether this is in use yet.\n\n**What**\n\nA forked agent is a separate copy of Claude that Claude Code starts to handle part of a task, carrying on from the main conversation's history. When Claude Code starts one, it can now pass two more things:\n\n- A count of API attempts left, which the forked agent uses for its own requests to the model.\n\n- A set of tool replacements, where some of the main conversation's tools are swapped for copies that behave differently when run but are otherwise identical.\n\nClaude Code refuses to start the fork, with an error, if the fork does not pick up exactly where the main conversation left off, or if a replacement is not a genuine copy of one of the main conversation's tools. A related relay mode for forks remains behind a switch that is off unless it is turned on remotely.\n\n**Why**\n\nPassing on a count of attempts left fits with retries after a dropped connection now drawing from the same budget as a request's other retries, so a forked agent cannot quietly start its retry count over.\n\n- Flag `tengu_wild_tome`: Off by default, switched on for this account (read for one account on one subscription tier against v2.1.286; this account: on, anonymous baseline: on, compiled default: off) These values were read against a different version of Claude Code, so treat them as the nearest reading available instead of one taken on this release.\n- Area: Subagents\n- Tier: Under the hood\n- Useful: 4\/5\n- Signal: 4\/5"}