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feat(commands): add /subagents spawn command

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Add a `spawn` action to the /subagents command handler that invokes
spawnSubagentDirect() to deterministically launch a named subagent.

Usage: /subagents spawn <agentId> <task> [--model <model>] [--thinking <level>]

Also includes the shared subagent-spawn module extraction (same as the
refactor/extract-shared-subagent-spawn branch) since it hasn't merged yet.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
This commit is contained in:
Joshua Mitchell
2026-02-16 10:07:22 -06:00
committed by Peter Steinberger
parent bb5ce3b02f
commit 5a3a448bc4
6 changed files with 616 additions and 284 deletions
Download Patch File Download Diff File Expand all files Collapse all files

55
src/auto-reply/reply/commands-subagents.ts
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@@ -10,6 +10,7 @@ import {
markSubagentRunForSteerRestart,
replaceSubagentRunAfterSteer,
} from "../../agents/subagent-registry.js";
import { spawnSubagentDirect } from "../../agents/subagent-spawn.js";
import {
extractAssistantText,
resolveInternalSessionKey,
@@ -47,7 +48,7 @@ const COMMAND = "/subagents";
const COMMAND_KILL = "/kill";
const COMMAND_STEER = "/steer";
const COMMAND_TELL = "/tell";
const ACTIONS = new Set(["list", "kill", "log", "send", "steer", "info", "help"]);
const ACTIONS = new Set(["list", "kill", "log", "send", "steer", "info", "spawn", "help"]);
const RECENT_WINDOW_MINUTES = 30;
const SUBAGENT_TASK_PREVIEW_MAX = 110;
const STEER_ABORT_SETTLE_TIMEOUT_MS = 5_000;
@@ -192,6 +193,7 @@ function buildSubagentsHelp() {
"- /subagents info <id|#>",
"- /subagents send <id|#> <message>",
"- /subagents steer <id|#> <message>",
"- /subagents spawn <agentId> <task> [--model <model>] [--thinking <level>]",
"- /kill <id|#|all>",
"- /steer <id|#> <message>",
"- /tell <id|#> <message>",
@@ -644,5 +646,56 @@ export const handleSubagentsCommand: CommandHandler = async (params, allowTextCo
};
}
if (action === "spawn") {
const agentId = restTokens[0];
// Parse remaining tokens: task text with optional --model and --thinking flags.
const taskParts: string[] = [];
let model: string | undefined;
let thinking: string | undefined;
for (let i = 1; i < restTokens.length; i++) {
if (restTokens[i] === "--model" && i + 1 < restTokens.length) {
i += 1;
model = restTokens[i];
} else if (restTokens[i] === "--thinking" && i + 1 < restTokens.length) {
i += 1;
thinking = restTokens[i];
} else {
taskParts.push(restTokens[i]);
}
}
const task = taskParts.join(" ").trim();
if (!agentId || !task) {
return {
shouldContinue: false,
reply: {
text: "Usage: /subagents spawn <agentId> <task> [--model <model>] [--thinking <level>]",
},
};
}
const result = await spawnSubagentDirect(
{ task, agentId, model, thinking, cleanup: "keep" },
{
agentSessionKey: requesterKey,
agentChannel: params.command.channel,
agentAccountId: params.ctx.AccountId,
agentTo: params.command.to,
agentThreadId: params.ctx.MessageThreadId,
},
);
if (result.status === "accepted") {
return {
shouldContinue: false,
reply: {
text: `Spawned subagent ${agentId} (session ${result.childSessionKey}, run ${result.runId?.slice(0, 8)}).${result.warning ? ` Warning: ${result.warning}` : ""}`,
},
};
}
return {
shouldContinue: false,
reply: { text: `Spawn failed: ${result.error ?? result.status}` },
};
}
return { shouldContinue: false, reply: { text: buildSubagentsHelp() } };
};