Method provisionChildWorkspace

packages/runtime/src/session-manager.ts:991–1015

(
    parent: SessionHeader,
    definition: AgentDefinition,
    requestFingerprint: string,
  )

  }

  private async provisionChildWorkspace(
    parent: SessionHeader,
    definition: AgentDefinition,
    requestFingerprint: string,
  ): Promise<SubagentWorkspaceBinding | undefined> {
    if (definition.contract.workspace !== AGENT_WORKSPACE_WORKTREE) return undefined;
    const executor = this.deps.worktreeChildExecutor;
    if (!executor) {
      throw new Error(
        `Agent "${definition.id}" is unavailable: "worktree" workspace isolation requires a worktree child executor.`,
      );
    }
    const fingerprint = requestFingerprint.startsWith('sha256:')
      ? requestFingerprint.slice('sha256:'.length)
      : requestFingerprint;
    if (!/^[a-f0-9]{64}$/.test(fingerprint)) {
      throw new Error('Child workspace request fingerprint must be SHA-256');
    }
    return executor.provision({
      leaseId: `subagent_worktree_${fingerprint.slice(0, 32)}`,
      sourceSessionId: parent.id,
      sourceCwd: parent.cwd,
      ...(parent.projectId !== undefined ? { sourceProjectId: parent.projectId } : {}),
    });
  }

  private async ensureChildWorkspace(header: SessionHeader): Promise<void> {
    const binding = header.subagentWorkspace;